技术领域Technical field
本发明属于配电网的安全保护配置与故障处理技术领域，具体涉及一种架空线-电缆混合线路的故障处理方法和安保配置。The invention belongs to the technical field of safety protection configuration and fault handling of distribution network, and specifically relates to a fault handling method and security configuration of an overhead line-cable hybrid line.
背景技术Background technique
传统配电网中普遍采用架空线路，然而，随着电网的迅速发展，铺设电缆不仅能够提高线路的输送容量、降低变电站的出线规模，而且减轻了对线路通道方面的压力，提高通道利用率，简化网络接线，因此，电网中电缆线路的比例逐渐上升，与原有架空线路结合，形成了配电网中架空线—电缆混合线路越来越多的现象。现有配电网安全保护配置与故障处理的研究多面向纯架空线路或纯电缆线路，而对架空线-电缆混合线路考虑较少。Overhead lines are commonly used in traditional distribution networks. However, with the rapid development of the power grid, laying cables can not only increase the transmission capacity of the lines and reduce the size of the outgoing substations, but also reduce the pressure on line channels and improve channel utilization. Simplifying network wiring, therefore, the proportion of cable lines in the power grid is gradually increasing, and combined with the original overhead lines, the phenomenon of more and more overhead line-cable hybrid lines in the distribution network has been formed. Research on the existing distribution network safety protection configuration and fault handling is mostly oriented towards pure overhead lines or pure cable lines, while less consideration is given to overhead line-cable hybrid lines.
对于纯架空线路，瞬时性故障较多，多配置多级别延时级差配合的电流保护，并据此采用继电保护与重合闸配合的方式进行故障处理，能够有效、快速地隔离永久性故障，并避免瞬时性故障下的用户失电。For pure overhead lines, there are many transient faults. It is better to configure current protection with multi-level delay and differential coordination, and use relay protection and reclosing to handle faults accordingly, which can effectively and quickly isolate permanent faults. And avoid power loss for users under transient faults.
对于纯电缆线路，一般认为故障基本是永久性的，跳闸后线路绝缘无法自动恢复，且电缆线路抗短路电流冲击能力弱，重合闸会对电缆产生再次损伤，容易引起事故扩大，因此不宜重合闸。多采用邻域交互快速自愈故障处理方式或集中智能配电自动化系统故障处理方式。其中，邻域交互快速自愈方式下，故障发生后，故障区域周边装设有邻域交互快速自愈控制功能的断路器迅速跳闸隔离故障区域；而集中智能配电自动化系统处理方式下，故障信息通过装设于环网柜的站所终端单元(date terminalunit，DTU)上传至主站进行统一分析处理，确定故障位置后，再遥控相应开关，隔离故障区域，恢复非故障区域供电。For pure cable lines, it is generally believed that the fault is basically permanent. The line insulation cannot automatically recover after tripping, and the cable line has weak resistance to short-circuit current impact. Reclosing will damage the cable again and easily cause the accident to expand, so it is not suitable to reclose. . The neighborhood interactive fast self-healing fault handling method or the centralized intelligent distribution automation system fault handling method is mostly used. Among them, in the neighborhood interactive fast self-healing mode, after a fault occurs, circuit breakers equipped with neighborhood interactive fast self-healing control functions around the fault area quickly trip to isolate the fault area; while in the centralized intelligent distribution automation system processing mode, the fault The information is uploaded to the main station through the date terminal unit (DTU) installed in the ring main unit for unified analysis and processing. After the fault location is determined, the corresponding switch is remotely controlled to isolate the fault area and restore power supply to the non-fault area.
对于架空-电缆混合线路，现有研究多依据电缆线路的故障处理方式，一般不投重合闸。但由于混合线路架空线路部分瞬时性故障多发，再加上用户内部线路也容易发生瞬时性故障，这种状况下如果不采用自动重合闸，往往会导致整条线路长时间停电，严重影响供电可靠性。另一方面，早期提出的含电缆线路不宜使用重合闸的依据，主要是考虑重合于永久故障时，故障电流可能造成电缆损坏以及对主变压器造成冲击，但目前情况已有很大不同。关于电缆，目前主流的交联聚乙烯(XLPE)电缆，在绝缘水平、机械强度、耐热能力、抗老化能力等方面都比早期电缆有了显著提高，有些还具备阻水、阻燃、耐火等特性。关于主变压器，出线开关重合于永久性故障时，短路电流会对主变压器形成再次冲击，但会不会导致变压器损坏，则应根据不同情况具体分析。For overhead-cable hybrid lines, existing research is mostly based on fault handling methods of cable lines, and reclosing is generally not used. However, due to the frequent transient faults in the overhead lines of hybrid lines, and the user's internal lines are also prone to transient faults, if automatic reclosing is not used in this situation, it will often lead to long-term power outages on the entire line, seriously affecting the reliability of power supply. sex. On the other hand, the early reasons why reclosing should not be used on lines containing cables were mainly based on the consideration that when reclosing occurs in a permanent fault, the fault current may cause cable damage and impact on the main transformer. However, the current situation is very different. Regarding cables, the current mainstream cross-linked polyethylene (XLPE) cables have significantly improved compared to early cables in terms of insulation level, mechanical strength, heat resistance, and anti-aging capabilities. Some are also water-resistant, flame-retardant, and fire-resistant. and other characteristics. Regarding the main transformer, when the outlet switch coincides with a permanent fault, the short-circuit current will have another impact on the main transformer, but whether it will cause damage to the transformer should be analyzed in detail according to different situations.
发明内容Contents of the invention
为克服上述现有技术的不足，本发明提出一种架空线-电缆混合线路的故障处理方法和安保配置。该方法和采用该方法的安保配置，面向配电网中的架空-电缆混合线路，考虑了配电网中的主变压器以及电缆线路抗短路电流能力的差异，针对不同的抗短路电流能力，进行不同的安全保护配置，并合理利用分布式处理与集中智能处理的优势，通过继电保护与重合闸的配合，快速实现最小范围的故障隔离与最大范围的供电恢复。In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes a fault handling method and security configuration for overhead line-cable hybrid lines. This method and the security configuration using this method are oriented to the overhead-cable hybrid lines in the distribution network. The differences in the short-circuit current resistance capabilities of the main transformers and cable lines in the distribution network are taken into account. According to different short-circuit current resistance capabilities, Different safety protection configurations, and rational use of the advantages of distributed processing and centralized intelligent processing, through the cooperation of relay protection and reclosing, can quickly achieve the smallest range of fault isolation and the largest range of power supply restoration.
实现上述目的所采用的解决方案为：The solutions adopted to achieve the above goals are:
一种架空线-电缆混合线路的故障处理方法，其改进之处在于，包括：A troubleshooting method for overhead line-cable hybrid lines, the improvement of which includes:
当预先设置安全保护配置的架空线-电缆混合线路发生故障时，When the overhead line-cable hybrid line with preset safety protection configuration fails,
针对所述架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与所述故障线路抗短路电流能力相对应的策略进行故障处理；In view of the short-circuit current resistance capability of the overhead line-cable hybrid line, select a strategy corresponding to the short-circuit current resistance capability of the fault line from the pre-constructed fault handling strategies for fault handling;
其中，所述架空线-电缆混合线路包括：架空线路和与所述架空线路连接的电缆线路；所述安全保护配置基于电缆线路和连接所述架空线-电缆混合线路的主变压器的抗短路电流能力进行配置；所述故障处理策略基于所述电缆线路和主变压器的抗短路电流能力进行配置。Wherein, the overhead line-cable hybrid line includes: an overhead line and a cable line connected to the overhead line; the safety protection configuration is based on the short-circuit current resistance of the cable line and the main transformer connected to the overhead line-cable hybrid line The fault handling strategy is configured based on the short-circuit current resistance capabilities of the cable line and the main transformer.
本发明提供的第一优选技术方案，其改进之处在于，所述为架空线-电缆混合线路进行安全保护配置，包括：The improvement of the first preferred technical solution provided by the present invention is that the safety protection configuration for the overhead line-cable hybrid line includes:
针对所有要进行安全保护配置的架空线-电缆混合线路，基于预设标准判断电缆线路和主变压器的抗短路电流能力；For all overhead line-cable hybrid lines that need to be configured for safety protection, the short-circuit current resistance capabilities of the cable lines and main transformers are judged based on preset standards;
当电缆线路抗短路电流能力低于第一标准时，对架空线路配置三级延时极差配合的电流保护，并在架空线路与电缆接点位置处配置电流速断保护；When the cable line's ability to withstand short-circuit current is lower than the first standard, the overhead line should be equipped with a three-level time delay current protection with extremely poor coordination, and a current quick-break protection should be installed at the contact point between the overhead line and the cable;
当电缆线路抗短路电流能力不低于第一标准且主变压器抗短路电流能力低于第二标准时，配置三级延时极差配合的电流保护，在主变压器所属变电站出线位置处配置速断保护，所述速断保护的设定值根据所述主变压器对短路电流的承受能力进行设置；When the cable line's ability to withstand short-circuit current is not lower than the first standard and the main transformer's ability to withstand short-circuit current is lower than the second standard, a three-level current protection with extremely poor coordination of time delay is configured, and a quick-break protection is configured at the outlet position of the substation to which the main transformer belongs. The setting value of the quick-break protection is set according to the main transformer's ability to withstand short-circuit current;
当电缆线路抗短路电流能力不低于第一标准且主变压器抗短路电流能力不低于第二标准时，配置三级延时极差配合的电流保护；When the cable line's resistance to short-circuit current is not lower than the first standard and the main transformer's resistance to short-circuit current is not lower than the second standard, a three-level current protection with extremely poor coordination of time delay is configured;
其中，所述第一标准根据对电缆线路抗短路电流能力要求设置，所述第二标准根据主变压器抗短路电流能力要求设置。Wherein, the first standard is set according to the short-circuit current resistance capability requirements of the cable line, and the second standard is set according to the short-circuit current resistance capability requirements of the main transformer.
本发明提供的第二优选技术方案，其改进之处在于，所述配置三级延时极差配合的电流保护，包括：The improvement of the second preferred technical solution provided by the present invention is that the current protection configured with three-level delay and extremely poor coordination includes:
分别在所述主变压器所属变电站出线处设置第一断路器、在架空线路的T接分支线处配置第二断路器以及在架空线路的次分支T接节点处配置第三断路器；A first circuit breaker is respectively provided at the outlet of the substation to which the main transformer belongs, a second circuit breaker is configured at the T-connection branch line of the overhead line, and a third circuit breaker is configured at the T-connection node of the secondary branch of the overhead line;
所述第一断路器的电流速断保护延时时间为速断延时，过流保护延时时间为第一过流延时，且所述第一过流延时大于速断延时，所述速断延时大于0，所述第一过流延时与速断延时的差值大于所述第一断路器的开关动作时间；The current quick-break protection delay time of the first circuit breaker is the quick-break delay, the over-current protection delay time is the first over-current delay, and the first over-current delay is greater than the quick-break delay, and the quick-break delay is greater than 0, the difference between the first overcurrent delay and the quick-break delay is greater than the switching action time of the first circuit breaker;
所述第二断路器的电流速断保护延时时间为0，过流保护延时时间为第二过流延时，且所述第二过流延时小于第一过流延时，所述第二过流延时大于0，所述述第二过流延时与第一过流延时的差值大于所述第二断路器的开关动作时间；The current quick-break protection delay time of the second circuit breaker is 0, the over-current protection delay time is the second over-current delay time, and the second over-current delay time is smaller than the first over-current delay time. The second overcurrent delay time is greater than 0, and the difference between the second overcurrent delay time and the first overcurrent delay time is greater than the switching action time of the second circuit breaker;
所述第三断路器的过流保护延时时间为0。The overcurrent protection delay time of the third circuit breaker is 0.
本发明提供的第三优选技术方案，其改进之处在于，所述故障处理策略，包括：继电保护与重合闸配合的故障处理策略和集中式故障处理策略。The improvement of the third preferred technical solution provided by the present invention is that the fault processing strategy includes: a fault processing strategy in which relay protection and reclosing are combined and a centralized fault processing strategy.
本发明提供的第四优选技术方案，其改进之处在于，所述针对所述架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与所述故障线路抗短路电流能力相对应的策略进行故障处理，包括：The improvement of the fourth preferred technical solution provided by the present invention is that, for the short-circuit current resistance of the overhead line-cable hybrid line, the short-circuit current resistance of the fault line is selected from the pre-constructed fault handling strategies. Capabilities corresponding strategies for troubleshooting, including:
若电缆线路抗短路能力不低于第一标准且主变压器抗短路能力不低于第二标准，基于所述三级延时极差配合的电流保护配置，进行继电保护与重合闸配合的故障处理。If the short-circuit resistance of the cable line is not lower than the first standard and the short-circuit resistance of the main transformer is not lower than the second standard, based on the current protection configuration of the three-level delay extreme coordination, the fault of relay protection and reclosing coordination is carried out deal with.
本发明提供的第五优选技术方案，其改进之处在于，所述针对所述架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与所述故障线路抗短路电流能力相对应的策略进行故障处理，包括：The improvement of the fifth preferred technical solution provided by the present invention is that with respect to the short-circuit current resistance of the overhead line-cable hybrid line, the short-circuit current resistance of the fault line is selected from the pre-constructed fault handling strategies. Capabilities corresponding strategies for troubleshooting, including:
若电缆线路抗短路能力不低于第一标准且主变压器抗短路能力低于第二标准，判断主变压器所属变电站出线位置处检测的故障电流是否小于所述速断保护的设定值：If the short-circuit resistance of the cable line is not lower than the first standard and the short-circuit resistance of the main transformer is lower than the second standard, determine whether the fault current detected at the outlet position of the substation to which the main transformer belongs is less than the set value of the quick-break protection:
若是，则基于所述三级延时极差配合的电流保护配置，进行继电保护与重合闸配合的故障处理；If so, based on the current protection configuration of the three-level delay extreme poor coordination, fault handling of relay protection and reclosing coordination is performed;
否则，所述变电站出线处速断保护动作，开关跳开并闭锁重合闸，采用集中式故障处理方法进行故障处理。Otherwise, the quick-break protection at the outlet of the substation is activated, the switch is tripped and the reclosing is blocked, and a centralized fault handling method is used for fault handling.
本发明提供的第六优选技术方案，其改进之处在于，所述针对所述架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与所述故障线路抗短路电流能力相对应的策略进行故障处理，包括：The improvement of the sixth preferred technical solution provided by the present invention is that, for the short-circuit current resistance of the overhead line-cable hybrid line, the short-circuit current resistance of the fault line is selected from the pre-constructed fault handling strategies. Capabilities corresponding strategies for troubleshooting, including:
若电缆线路抗短路能力低于第一标准，对架空线路内部故障，基于所述三级延时极差配合的电流保护配置采用继电保护与重合闸配合的方式进行故障处理；对电缆线内部故障，架空线路与电缆线路连接点处的电流速断保护发生动作，跳开架空线路与电缆连接处开关并闭锁重合闸，采用集中式故障处理方法进行故障处理。If the short-circuit resistance of the cable line is lower than the first standard, for internal faults in the overhead line, the current protection configuration based on the three-level delay extreme coordination adopts the combination of relay protection and reclosing to handle the fault; for internal faults in the cable line In the event of a fault, the current quick-break protection at the connection point between the overhead line and the cable line operates, the switch at the connection point between the overhead line and the cable line is tripped and the reclosing is blocked, and a centralized fault handling method is used for troubleshooting.
本发明提供的第七优选技术方案，其改进之处在于，所述采用集中式故障处理方法进行故障处理，包括：The improvement of the seventh preferred technical solution provided by the present invention is that the centralized fault processing method is used for fault processing, including:
采集故障前后输电线路信息并发送至配电自动化主站；Collect transmission line information before and after the fault and send it to the distribution automation main station;
所述配电自动化主站根据所述信息判断故障发生区域，并断开故障区域开关隔离故障区域；The distribution automation master station determines the fault occurrence area based on the information, and disconnects the fault area switch to isolate the fault area;
所述配电自动化主站闭合非故障区域开关，恢复非故障区域供电。The distribution automation master station closes the non-fault area switch and restores power supply to the non-fault area.
一种架空线-电缆混合线路的故障处理系统，其改进之处在于，包括：故障处理模块；A fault handling system for overhead line-cable hybrid lines, which is improved in that it includes: a fault handling module;
所述故障处理模块，用于当预先设置安全保护配置的架空线-电缆混合线路发生故障时，针对所述架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与所述故障线路抗短路电流能力相对应的策略进行故障处理；The fault processing module is used to select from the pre-constructed fault processing strategies based on the short-circuit current resistance capability of the overhead wire-cable hybrid line when a fault occurs in the overhead wire-cable hybrid line with pre-set safety protection configuration. Carry out fault handling according to strategies corresponding to the short-circuit current resistance capability of the faulty line;
其中，所述架空线-电缆混合线路包括：架空线路和与所述架空线路连接的电缆线路；所述安全保护配置基于电缆线路和连接所述架空线-电缆混合线路的主变压器的抗短路电流能力进行配置；所述故障处理策略基于所述电缆线路和主变压器的抗短路电流能力进行配置。Wherein, the overhead line-cable hybrid line includes: an overhead line and a cable line connected to the overhead line; the safety protection configuration is based on the short-circuit current resistance of the cable line and the main transformer connected to the overhead line-cable hybrid line The fault handling strategy is configured based on the short-circuit current resistance capabilities of the cable line and the main transformer.
本发明提供的第八优选技术方案，其改进之处在于，还包括用于为架空线-电缆混合线路进行安全保护配置的安保配置模块，所述安保配置模块包括抗短路电流判断单元、第一配置单元、第二配置单元和第三配置单元；The improvement of the eighth preferred technical solution provided by the present invention is that it also includes a security configuration module for configuring safety protection for overhead line-cable hybrid lines. The security configuration module includes an anti-short-circuit current judgment unit, a first configuration unit, second configuration unit and third configuration unit;
所述抗短路电流判断单元，用于针对所有要进行安全保护配置的架空线-电缆混合线路，基于预设标准判断电缆线路和主变压器的抗短路电流能力；The short-circuit current resistance judgment unit is used to judge the short-circuit current resistance capabilities of cable lines and main transformers based on preset standards for all overhead line-cable hybrid lines that are to be configured for safety protection;
所述第一配置单元，用于当电缆线路抗短路电流能力低于第一标准时，对架空线路配置三级延时极差配合的电流保护，并在架空线路与电缆接点位置处配置电流速断保护；The first configuration unit is used to configure a three-level delay current protection for the overhead line when the short-circuit current resistance of the cable line is lower than the first standard, and configure a current quick-break protection at the contact point between the overhead line and the cable. ;
所述第二配置单元，用于当电缆线路抗短路电流能力不低于第一标准且主变压器抗短路电流能力低于第二标准时，配置三级延时极差配合的电流保护，在主变压器所属变电站出线位置处配置速断保护，所述速断保护的设定值根据所述主变压器对短路电流的承受能力进行设置；The second configuration unit is used to configure the current protection with three-level delay and extremely poor coordination when the short-circuit current resistance capability of the cable line is not lower than the first standard and the short-circuit current resistance capability of the main transformer is lower than the second standard. The outlet position of the substation is equipped with quick-break protection, and the setting value of the quick-break protection is set according to the main transformer's ability to withstand short-circuit current;
所述第三配置单元，用于当电缆线路抗短路电流能力不低于第一标准且主变压器抗短路电流能力不低于第二标准时，配置三级延时极差配合的电流保护；The third configuration unit is used to configure the current protection with three levels of time delay and extremely poor coordination when the short-circuit current resistance capability of the cable line is not lower than the first standard and the short-circuit current resistance capability of the main transformer is not lower than the second standard;
其中，所述第一标准根据对电缆线路抗短路电流能力要求设置，所述第二标准根据主变压器抗短路电流能力要求设置。Wherein, the first standard is set according to the short-circuit current resistance capability requirements of the cable line, and the second standard is set according to the short-circuit current resistance capability requirements of the main transformer.
本发明提供的第九优选技术方案，其改进之处在于，所述安保配置模块还包括三级延时配置单元；The improvement of the ninth preferred technical solution provided by the present invention is that the security configuration module further includes a three-level delay configuration unit;
所述三级延时配置单元，用于分别在所述主变压器所属变电站出线处设置第一断路器、在架空线路的T接分支线处配置第二断路器以及在架空线路的次分支T接节点处配置第三断路器；The three-level delay configuration unit is used to set a first circuit breaker at the outlet of the substation to which the main transformer belongs, a second circuit breaker at the T-connection branch line of the overhead line, and a T-connection sub-branch of the overhead line. A third circuit breaker is configured at the node;
所述第一断路器的电流速断保护延时时间为速断延时，过流保护延时时间为第一过流延时，且所述第一过流延时大于速断延时，所述速断延时大于0，所述第一过流延时与速断延时的差值大于所述第一断路器的开关动作时间；The current quick-break protection delay time of the first circuit breaker is the quick-break delay, the over-current protection delay time is the first over-current delay, and the first over-current delay is greater than the quick-break delay, and the quick-break delay is greater than 0, the difference between the first overcurrent delay and the quick-break delay is greater than the switching action time of the first circuit breaker;
所述第二断路器的电流速断保护延时时间为0，过流保护延时时间为第二过流延时，且所述第二过流延时小于第一过流延时，所述第二过流延时大于0，所述述第二过流延时与第一过流延时的差值大于所述第二断路器的开关动作时间；The current quick-break protection delay time of the second circuit breaker is 0, the over-current protection delay time is the second over-current delay time, and the second over-current delay time is smaller than the first over-current delay time. The second overcurrent delay time is greater than 0, and the difference between the second overcurrent delay time and the first overcurrent delay time is greater than the switching action time of the second circuit breaker;
所述第三断路器的过流保护延时时间为0。The overcurrent protection delay time of the third circuit breaker is 0.
与最接近的现有技术相比，本发明具有的有益效果如下：Compared with the closest existing technology, the beneficial effects of the present invention are as follows:
本发明考虑了配电网中的主变压器以及电缆线路抗短路电流能力的差异，针对不同的抗短路电流能力，进行不同的安全保护配置并建立故障处理策略，能够针对线路不同的抗短路电流能力，进行对应的故障处理。This invention takes into account the difference in the short-circuit current resistance capabilities of the main transformer and cable lines in the distribution network, and carries out different safety protection configurations and establishes fault handling strategies for different short-circuit current resistance capabilities, and can target the different short-circuit current resistance capabilities of the lines. , perform corresponding fault handling.
本发明进一步合理利用分布式处理与集中智能处理的优势，通过继电保护与重合闸的配合，有效区分永久性故障与瞬时性故障，快速实现最小范围的故障隔离与最大范围的供电恢复。The present invention further rationally utilizes the advantages of distributed processing and centralized intelligent processing, and effectively distinguishes permanent faults from transient faults through the cooperation of relay protection and reclosing, and quickly realizes the smallest range of fault isolation and the largest range of power supply restoration.
附图说明Description of the drawings
图1为本发明提供的一种架空线-电缆混合线路的故障处理方法流程示意图；Figure 1 is a schematic flow chart of a fault handling method for an overhead line-cable hybrid line provided by the present invention;
图2为本发明提供的一种架空线-电缆混合线路的故障处理方法具体流程示意图；Figure 2 is a schematic flowchart of a specific fault handling method for an overhead line-cable hybrid line provided by the present invention;
图3为本发明涉及的一个配电网中架空线-电缆混合线路的实施例示意图；Figure 3 is a schematic diagram of an embodiment of an overhead line-cable hybrid line in a distribution network related to the present invention;
图4为本发明提供的一种架空线-电缆混合线路的故障处理系统基本结构示意图；Figure 4 is a schematic diagram of the basic structure of a fault handling system for an overhead line-cable hybrid line provided by the present invention;
图5为本发明提供的一种架空线-电缆混合线路的故障处理系统详细结构示意图。Figure 5 is a detailed structural diagram of a fault handling system for an overhead line-cable hybrid line provided by the present invention.
具体实施方式Detailed ways
下面结合附图对本发明的具体实施方式做进一步的详细说明。The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
实施例1：Example 1:
本发明提供的一种架空线-电缆混合线路的故障处理方法流程示意图如图1所示，包括：The schematic flow chart of a fault handling method for an overhead line-cable hybrid line provided by the present invention is shown in Figure 1, including:
当预先设置安全保护配置的架空线-电缆混合线路发生故障时，When the overhead line-cable hybrid line with preset safety protection configuration fails,
针对架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与故障线路抗短路电流能力相对应的策略进行故障处理；In view of the short-circuit current resistance capability of the overhead line-cable hybrid line, a strategy corresponding to the short-circuit current resistance capability of the fault line is selected from the pre-constructed fault handling strategies for fault handling;
其中，架空线-电缆混合线路包括：架空线路和与架空线路连接的电缆线路；安全保护配置基于电缆线路和连接架空线-电缆混合线路的主变压器的抗短路电流能力进行配置；故障处理策略基于电缆线路和主变压器的抗短路电流能力进行配置。Among them, the overhead line-cable hybrid line includes: overhead lines and cable lines connected to the overhead line; the safety protection configuration is configured based on the short-circuit current capability of the cable line and the main transformer connecting the overhead line-cable hybrid line; the fault handling strategy is based on The cable lines and the main transformer are configured for short-circuit current resistance.
具体的，架空线路主要指架空明线，架设在地面之上，是用绝缘子将输电导线固定在直立于地面的杆塔上以传输电能的输电线路，一般使用无绝缘的裸导线。电力电缆线路一般由导线、绝缘层和保护层组成有单芯、双芯和三芯电缆；地下电缆线路多用于架空线路架设困难的地区，如城市或特殊跨越地段的输电。在本申请中，架空线-电缆混合线路包括：架空线路和与该架空线路连接的电缆线路。Specifically, overhead lines mainly refer to overhead open wires, which are erected above the ground. They are transmission lines that use insulators to fix transmission wires on towers standing on the ground to transmit electrical energy. Generally, uninsulated bare wires are used. Power cable lines are generally composed of wires, insulation layers and protective layers, including single-core, double-core and three-core cables; underground cable lines are mostly used in areas where it is difficult to erect overhead lines, such as cities or special cross-section power transmission. In this application, the overhead line-cable hybrid line includes: an overhead line and a cable line connected to the overhead line.
架空线-电缆混合线路的故障处理方法如图2所示，包括：The troubleshooting method for overhead line-cable hybrid lines is shown in Figure 2, including:
首先分别判断主变压器以及电缆线路抗短路电流的能力。First, determine the ability of the main transformer and cable lines to withstand short-circuit current.
若配电网中的主变压器以及电缆线路抗短路电流能力强即主变压器抗短路电流能力不低于预设第一标准且主变压器抗短路能力不低于预设第二标准，则配置变电站出线断路器、分支和用户(次分支)三级延时级差配合的电流保护，据此采用继电保护与重合闸配合的方式进行故障处理。具体为：在变电站出线处配置断路器，具备“三遥”功能、电流保护和故障电流上报功能；在T接分支线处配置断路器，具备“三遥”功能、电流保护和故障电流上报功能；在次分支T接节点(故障发生次数较多的次分支节点处设置即可)处配置断路器，具备“三遥”功能、电流保护和故障电流上报功能。变电站出线断路器配置延时电流速断保护和过流保护，延时时间分别为t1(如0.25s)和t2(如0.5s)(t1与t2满足0＜t1＜t2，且0、t1与t2之间时间间隔应大于开关的动作时间)；T接分支线处的断路器配置瞬时电流速断保护和过流保护，延时时间分别为0s和t3(如0.25s)(t3应满足0＜t3＜t2，且0、t3与t2之间时间间隔应大于开关的动作时间)；次分支T接节点处的断路器配置过流保护，延时时间为0s。由三处断路器配合进行继电保护与重合闸配合的故障处理。本申请中，第一标准根据对电缆线路抗短路电流能力要求设置，第二标准根据主变压器抗短路电流能力要求设置。If the main transformer and cable lines in the distribution network have strong resistance to short-circuit current, that is, the main transformer's resistance to short-circuit current is not lower than the preset first standard and the main transformer's short-circuit resistance is not lower than the preset second standard, then configure the substation outlet The three-level delayed differential current protection of circuit breaker, branch and user (sub-branch) is used to deal with faults by combining relay protection and reclosing. Specifically: a circuit breaker is configured at the outgoing line of the substation, with "three remote" functions, current protection and fault current reporting functions; a circuit breaker is configured at the T-connection branch line, with "three remote" functions, current protection and fault current reporting functions. ; Configure a circuit breaker at the T-junction node of the sub-branch (it can be set at the sub-branch node with more faults), with the "three remote" function, current protection and fault current reporting functions. The outgoing circuit breaker of the substation is equipped with delayed current quick-break protection and overcurrent protection. The delay times are t1 (such as 0.25s) and t2 (such as 0.5s) respectively (t1 and t2 satisfy 0＜t1＜t2, and 0, t1 and t2 The time interval between them should be greater than the action time of the switch); the circuit breaker at the branch line connected to T is equipped with instantaneous current quick-break protection and overcurrent protection, and the delay time is 0s and t3 (such as 0.25s) respectively (t3 should satisfy 0<t3 <t2, and the time interval between 0, t3 and t2 should be greater than the action time of the switch); the circuit breaker at the T connection node of the secondary branch is configured with overcurrent protection, and the delay time is 0s. Three circuit breakers cooperate to handle faults in relay protection and reclosing. In this application, the first standard is set based on the requirements for the cable line's ability to withstand short-circuit current, and the second standard is set based on the requirements for the main transformer's ability to withstand short-circuit current.
若配电网中的电缆抗短路电流能力强即电缆线路抗短路能力不低于第一标准，但主变压器抗短路电流能力较弱即低于第二标准，则按照前述保护配置方案配置保护外，另在变电站出线位置处配置速断保护，并根据主变压器对短路电流的承受能力设置相应设定值即阈值。当变电站出线位置处检测到的故障电流小于设定值时，依靠变电站出线断路器、分支和用户(次分支)三级延时级差配合的电流保护进行故障的隔离处理；当变电站出线位置处检测到的故障电流大于设定值时，变电站出线位置处的电流速断保护动作，开关跳开并自动闭锁重合闸，各配电开关监控终端FTU、站所终端单元DTU将故障时刻前后采集到的信息发送至配电自动化主站，由主站判定故障区域并遥控相应开关断开隔离故障区域，之后闭合其他开关，恢复非故障区域供电。If the cables in the distribution network have a strong ability to withstand short-circuit current, that is, the cable line's ability to withstand short-circuit current is not lower than the first standard, but the main transformer's ability to withstand short-circuit current is weak, that is, it is lower than the second standard, then configure the external protection according to the aforementioned protection configuration plan. In addition, quick-break protection is configured at the outlet position of the substation, and the corresponding setting value, that is, the threshold, is set according to the main transformer's ability to withstand short-circuit current. When the fault current detected at the substation outlet position is less than the set value, the fault is isolated by relying on the current protection of the three-level delay differential of the substation outlet circuit breaker, branch and user (sub-branch); when the fault current is detected at the substation outlet position When the fault current is greater than the set value, the current quick-break protection at the outlet of the substation is activated, the switch trips and automatically locks and recloses. Each distribution switch monitoring terminal FTU and the station terminal unit DTU collect the information collected before and after the fault moment. It is sent to the power distribution automation master station, which determines the fault area and remotely controls the corresponding switch to disconnect and isolate the fault area, and then closes other switches to restore power supply to the non-fault area.
若配电网中的电缆抗短路电流能力较弱即低于第一标准，则对架空线路部分，配置变电站出线断路器、分支和用户(次分支)三级延时级差配合的电流保护，据此采用继电保护与重合闸配合的方式进行故障处理。对电缆线路，在架空-电缆接点位置处配置电流速断保护，若电缆线路内部发生短路故障，则架空-电缆接点位置处速断保护动作，开关跳开并自动闭锁重合闸，电缆线路部分配置的各DTU将故障时刻前后采集到的信息发送至配电自动化主站，由主站判定故障区域并遥控相应开关断开，之后闭合其他开关，恢复非故障区域供电。If the ability of the cables in the distribution network to withstand short-circuit current is weak, that is, lower than the first standard, then for the overhead line part, a three-level delayed differential current protection of the substation outlet circuit breaker, branch and user (sub-branch) is configured. This method uses relay protection and reclosing to handle faults. For cable lines, a current quick-break protection is configured at the overhead-cable contact position. If a short-circuit fault occurs inside the cable line, the quick-break protection at the overhead-cable contact position will activate, the switch will trip and automatically lock and reclos. The DTU sends the information collected before and after the fault moment to the distribution automation master station. The master station determines the fault area and remotely opens the corresponding switch. Then it closes other switches and restores power supply to the non-fault area.
实施例2：Example 2:
针对图3所示架空线-电缆混合线路，实施本专利所述方法。For the overhead line-cable hybrid line shown in Figure 3, the method described in this patent is implemented.
若变电站1中的主变压器以及电缆线路区域的电缆抗短路电流能力强，则在变电站出线C1、分支C2以及用户(次分支)C5处配置三级延时级差配合的电流保护，据此采用继电保护与重合闸配合的方式进行故障处理。具体为：在C1处配置断路器，具备“三遥”功能、电流保护和故障电流上报功能；在C2处配置断路器，具备“三遥”功能、电流保护和故障电流上报功能；在C5处配置断路器，具备“三遥”功能、电流保护和故障电流上报功能。C1处断路器配置延时电流速断保护和过流保护，延时时间分别为0.25s和0.5s；C2处断路器配置瞬时电流速断保护和过流保护，延时时间分别为0s和0.25s；C5处的断路器配置过流保护，延时时间为0s。If the main transformer in substation 1 and the cables in the cable line area have strong resistance to short-circuit current, then three-level delay differential current protection is configured at the substation outlet C1, branch C2 and user (secondary branch) C5, and relay protection is adopted accordingly. Troubleshooting is done through the cooperation of electrical protection and reclosing. Specifically: a circuit breaker is configured at C1 with the "three remote" function, current protection and fault current reporting function; a circuit breaker is configured at C2 with the "three remote" function, current protection and fault current reporting function; at C5 Equipped with a circuit breaker, it has "three remote" functions, current protection and fault current reporting functions. The circuit breaker at C1 is equipped with delayed current quick-break protection and over-current protection, with delay times of 0.25s and 0.5s respectively; the circuit breaker at C2 is equipped with instantaneous current quick-break protection and over-current protection, with delay times of 0s and 0.25s respectively; The circuit breaker at C5 is configured with overcurrent protection, and the delay time is 0s.
若配电网中的电缆抗短路电流能力强，但变电站1中的主变压器抗短路电流能力较弱，则按照前述保护配置方案配置保护外，另在变电站出线位置处配置速断保护，并根据主变压器对短路电流的承受能力设置相应定值。当变电站出线位置处(即C1)检测到的故障电流小于设定值时，依靠变电站出线断路器、分支和用户(次分支)三级延时级差配合的电流保护进行故障的隔离处理；当变电站出线位置处(即C1)检测到的故障电流大于设定值时，变电站出线位置处的电流速断保护动作，开关跳开并自动闭锁重合闸，各FTU、DTU将故障时刻前后采集到的信息发送至配电自动化主站，由主站判定故障区域并遥控相应开关断开，隔离故障区域，之后闭合其他开关，恢复非故障区域供电。If the cables in the distribution network have a strong ability to withstand short-circuit current, but the main transformer in substation 1 has a weak ability to withstand short-circuit current, in addition to configuring protection according to the aforementioned protection configuration scheme, additionally configure quick-break protection at the outgoing line position of the substation, and configure it according to the main The transformer's ability to withstand short-circuit current is set to a corresponding value. When the fault current detected at the substation outlet position (i.e. C1) is less than the set value, the fault is isolated by relying on the current protection of the substation outlet circuit breaker, branch and user (sub-branch) three-level delay step difference; when the substation When the fault current detected at the outlet position (i.e. C1) is greater than the set value, the current quick-break protection at the outlet position of the substation operates, the switch trips and automatically locks and recloses. Each FTU and DTU sends the information collected before and after the fault moment. To the distribution automation master station, the master station determines the fault area and remotely controls the disconnection of the corresponding switch to isolate the fault area, and then closes other switches to restore power supply to the non-fault area.
若配电网中的电缆抗短路电流能力较弱，则对架空线路部分，配置变电站出线断路器、分支和用户(次分支)三级延时级差配合的电流保护，据此采用继电保护与重合闸配合的方式进行故障处理。对电缆线路，在架空-电缆接点位置处(即C6)配置电流速断保护，若电缆线路内部发生短路故障，则架空-电缆接点位置处速断保护动作，开关跳开并自动闭锁重合闸，电缆线路部分配置的各DTU将故障时刻前后采集到的信息发送至配电自动化主站，由主站判定故障区域并遥控相应开关断开，之后闭合其他开关，恢复非故障区域供电。If the cables in the distribution network have weak resistance to short-circuit current, then for the overhead line part, a current protection with three-level delay differential coordination of the substation outgoing circuit breaker, branch and user (sub-branch) is used. Accordingly, relay protection and Troubleshooting is performed using reclosing coordination. For cable lines, a current quick-break protection is configured at the overhead-cable contact position (i.e. C6). If a short-circuit fault occurs inside the cable line, the quick-break protection at the overhead-cable contact position will activate, the switch will trip and automatically lock and reclosing, and the cable line Each partially configured DTU sends the information collected before and after the fault moment to the distribution automation master station. The master station determines the fault area and remotely controls the corresponding switch to open, and then closes other switches to restore power supply to the non-fault area.
实施例3：Example 3:
基于同一发明构思，本发明还提供了一种架空线-电缆混合线路的故障处理系统，由于这些设备解决技术问题的原理与架空线-电缆混合线路的故障处理方法相似，重复之处不再赘述。Based on the same inventive concept, the present invention also provides a troubleshooting system for overhead line-cable hybrid lines. Since the principles of these devices for solving technical problems are similar to the troubleshooting methods for overhead line-cable hybrid lines, the repetitive details will not be repeated. .
该系统基本结构如图4所示，包括：故障处理模块；The basic structure of the system is shown in Figure 4, including: fault handling module;
其中，故障处理模块，用于当预先设置安全保护配置的架空线-电缆混合线路发生故障时，针对架空线-电缆混合线路的抗短路电流能力，从预先构建的故障处理策略中选择与故障线路抗短路电流能力相对应的策略进行故障处理；Among them, the fault processing module is used to select the faulty line from the pre-built fault handling strategy based on the short-circuit current resistance capability of the overhead line-cable hybrid line when a fault occurs in the overhead line-cable hybrid line with pre-set safety protection configuration. Troubleshooting strategies corresponding to the short-circuit current capability;
其中，架空线-电缆混合线路包括：架空线路和与架空线路连接的电缆线路；安全保护配置基于电缆线路和连接架空线-电缆混合线路的主变压器的抗短路电流能力进行配置；故障处理策略基于电缆线路和主变压器的抗短路电流能力进行配置。Among them, the overhead line-cable hybrid line includes: overhead lines and cable lines connected to the overhead line; the safety protection configuration is configured based on the short-circuit current capability of the cable line and the main transformer connecting the overhead line-cable hybrid line; the fault handling strategy is based on The cable lines and the main transformer are configured for short-circuit current resistance.
架空线-电缆混合线路的故障处理系统详细结构如图5所示，还包括用于为架空线-电缆混合线路进行安全保护配置的安保配置模块，安保配置模块包括抗短路电流判断单元、第一配置单元、第二配置单元和第三配置单元；The detailed structure of the fault handling system of the overhead line-cable hybrid line is shown in Figure 5. It also includes a security configuration module for configuring safety protection for the overhead line-cable hybrid line. The security configuration module includes an anti-short-circuit current judgment unit, a first configuration unit, second configuration unit and third configuration unit;
抗短路电流判断单元，用于针对所有要进行安全保护配置的架空线-电缆混合线路，基于预设标准判断电缆线路和主变压器的抗短路电流能力；The anti-short-circuit current judgment unit is used to judge the anti-short-circuit current capabilities of cable lines and main transformers based on preset standards for all overhead line-cable hybrid lines that need to be configured for safety protection;
第一配置单元，用于当电缆线路抗短路电流能力低于第一标准时，对架空线路配置三级延时极差配合的电流保护，并在架空线路与电缆接点位置处配置电流速断保护；The first configuration unit is used to configure the three-level delay current protection for the overhead line when the short-circuit current resistance of the cable line is lower than the first standard, and configure the current quick-break protection at the contact point between the overhead line and the cable;
第二配置单元，用于当电缆线路抗短路电流能力不低于第一标准且主变压器抗短路电流能力低于第二标准时，配置三级延时极差配合的电流保护，在主变压器所属变电站出线位置处配置速断保护，速断保护的设定值根据主变压器对短路电流的承受能力进行设置；The second configuration unit is used to configure the current protection with three-level delay and extremely poor coordination when the short-circuit current resistance capability of the cable line is not lower than the first standard and the short-circuit current resistance capability of the main transformer is lower than the second standard. It is installed in the substation to which the main transformer belongs. The outlet position is equipped with quick-break protection, and the setting value of the quick-break protection is set according to the main transformer's ability to withstand short-circuit current;
第三配置单元，用于当电缆线路抗短路电流能力不低于第一标准且主变压器抗短路电流能力不低于第二标准时，配置三级延时极差配合的电流保护。The third configuration unit is used to configure the current protection with three-level delay and extremely poor coordination when the short-circuit current resistance capability of the cable line is not lower than the first standard and the short-circuit current resistance capability of the main transformer is not lower than the second standard.
其中，安保配置模块还包括三级延时配置单元；Among them, the security configuration module also includes a three-level delay configuration unit;
三级延时配置单元，用于分别在主变压器所属变电站出线处设置第一断路器、在架空线路的T接分支线处配置第二断路器以及在架空线路的次分支T接节点处配置第三断路器；The three-level delay configuration unit is used to set the first circuit breaker at the outlet of the substation to which the main transformer belongs, configure the second circuit breaker at the T-connection branch line of the overhead line, and configure the third circuit breaker at the T-connection node of the secondary branch of the overhead line. Three circuit breakers;
第一断路器的电流速断保护延时时间为速断延时，过流保护延时时间为第一过流延时，且第一过流延时大于速断延时，速断延时大于0，第一过流延时与速断延时的差值大于第一断路器的开关动作时间；The current quick-break protection delay time of the first circuit breaker is the quick-break delay, and the over-current protection delay time is the first over-current delay, and the first over-current delay is greater than the quick-break delay, and the quick-break delay is greater than 0. The difference between the overcurrent delay and the quick-break delay is greater than the switching action time of the first circuit breaker;
第二断路器的电流速断保护延时时间为0，过流保护延时时间为第二过流延时，且第二过流延时小于第一过流延时，第二过流延时大于0，述第二过流延时与第一过流延时的差值大于第二断路器的开关动作时间；The current quick-break protection delay time of the second circuit breaker is 0, the overcurrent protection delay time is the second overcurrent delay time, and the second overcurrent delay time is smaller than the first overcurrent delay time, and the second overcurrent delay time is greater than 0, the difference between the second overcurrent delay time and the first overcurrent delay time is greater than the switching action time of the second circuit breaker;
第三断路器的过流保护延时时间为0。The overcurrent protection delay time of the third circuit breaker is 0.
其中，故障处理策略，包括：继电保护与重合闸配合的故障处理策略和集中式故障处理策略。Among them, the fault handling strategy includes: the fault handling strategy of relay protection and reclosing and the centralized fault handling strategy.
其中，架空线-电缆混合线路的故障处理系统还包括用于构建故障处理策略的策略构建模块；策略构建模块包括第一策略单元、第二策略单元和第三策略单元；Among them, the fault handling system of the overhead line-cable hybrid line also includes a strategy building module for constructing a fault handling strategy; the strategy building module includes a first strategy unit, a second strategy unit and a third strategy unit;
第一策略单元，若电缆线路抗短路能力低于第一标准，对架空线路内部故障，基于三级延时极差配合的电流保护配置采用继电保护与重合闸配合的方式进行故障处理；对电缆线内部故障，架空线路与电缆线路连接点处的电流速断保护发生动作，跳开架空线路与电缆连接处开关并闭锁重合闸，采用集中式故障处理方法进行故障处理。In the first strategy unit, if the short-circuit resistance of the cable line is lower than the first standard, for the internal fault of the overhead line, the current protection configuration based on the three-level delay extreme coordination adopts the combination of relay protection and reclosing to handle the fault; If there is an internal fault in the cable line, the current quick-break protection at the connection point between the overhead line and the cable line will operate, the switch at the connection point between the overhead line and the cable line will be tripped and the reclosing block will be blocked, and a centralized fault handling method will be used for troubleshooting.
第二策略单元，若电缆线路抗短路能力不低于第一标准且主变压器抗短路能力低于第二标准，判断主变压器所属变电站出线位置处检测的故障电流是否小于速断保护的设定值：若是，则基于三级延时极差配合的电流保护配置，进行继电保护与重合闸配合的故障处理；否则，变电站出线处速断保护动作，开关跳开并闭锁重合闸，采用集中式故障处理方法进行故障处理。The second strategy unit, if the short-circuit resistance of the cable line is not lower than the first standard and the short-circuit resistance of the main transformer is lower than the second standard, determines whether the fault current detected at the outlet position of the substation to which the main transformer belongs is less than the set value of the quick-break protection: If so, based on the current protection configuration with three-level delay and extremely poor coordination, fault handling of relay protection and reclosing is performed; otherwise, the quick-break protection at the outlet of the substation is activated, the switch trips and the reclosing is blocked, and centralized fault handling is adopted method for troubleshooting.
第三策略单元，若电缆线路抗短路能力不低于第一标准且主变压器抗短路能力不低于第二标准，基于三级延时极差配合的电流保护配置，进行继电保护与重合闸配合的故障处理。The third strategy unit, if the short-circuit resistance of the cable line is not lower than the first standard and the short-circuit resistance of the main transformer is not lower than the second standard, relay protection and reclosing are performed based on the current protection configuration of the three-level delay extreme cooperation. Coordinated troubleshooting.
其中，策略构建模块还包括集中处理单元，集中处理单元，用于采集故障前后输电线路信息并发送至配电自动化主站；控制配电自动化主站根据信息判断故障发生区域，并断开故障区域开关隔离故障区域；并控制配电自动化主站闭合非故障区域开关，恢复非故障区域供电。Among them, the strategy building module also includes a centralized processing unit, which is used to collect transmission line information before and after the fault and send it to the distribution automation master station; it controls the distribution automation master station to determine the fault occurrence area based on the information and disconnect the fault area. The switch isolates the fault area; and controls the distribution automation master station to close the switch in the non-fault area and restore the power supply to the non-fault area.
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will understand that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.
最后应当说明的是:以上实施例仅用于说明本申请的技术方案而非对其保护范围的限制,尽管参照上述实施例对本申请进行了详细的说明,所属领域的普通技术人员应当理解:本领域技术人员阅读本申请后依然可对申请的具体实施方式进行种种变更、修改或者等同替换，但这些变更、修改或者等同替换，均在申请待批的权利要求保护范围之内。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and do not limit the scope of protection. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: After reading this application, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are within the scope of the claims of the application that are pending approval.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910327386.XACN110098599B (en) | 2019-04-23 | 2019-04-23 | A fault handling method and system for overhead line-cable hybrid lines |
| Application Number | Priority Date | Filing Date | Title |
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| CN201910327386.XACN110098599B (en) | 2019-04-23 | 2019-04-23 | A fault handling method and system for overhead line-cable hybrid lines |
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| CN110098599Btrue CN110098599B (en) | 2024-03-15 |
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| CN201910327386.XAActiveCN110098599B (en) | 2019-04-23 | 2019-04-23 | A fault handling method and system for overhead line-cable hybrid lines |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794340B (en)* | 2019-11-13 | 2022-06-14 | 深圳供电局有限公司 | A kind of disconnection protection method and circuit of high-voltage overhead line |
| CN112234588B (en)* | 2020-11-10 | 2023-03-31 | 国网河南省电力公司经济技术研究院 | Circuit breaker-based power distribution network line protection system and method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336218A (en)* | 2013-06-25 | 2013-10-02 | 国家电网公司 | Reclosing criterion system for hybrid transmission line to ground short circuit fault |
| CN105071357A (en)* | 2015-08-13 | 2015-11-18 | 国家电网公司 | Fault processing method based on multistage extreme difference protection and power distribution network automation system |
| CN106655122A (en)* | 2016-12-13 | 2017-05-10 | 国网山东省电力公司电力科学研究院 | Multilevel differential protection system and method of power distribution overhead-cable mixed lines |
| CN108988303A (en)* | 2018-07-19 | 2018-12-11 | 西安交通大学 | Utilize the adaptive reclosing method of MMC-HVDC DC line of breaker injected pulse signal |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336218A (en)* | 2013-06-25 | 2013-10-02 | 国家电网公司 | Reclosing criterion system for hybrid transmission line to ground short circuit fault |
| CN105071357A (en)* | 2015-08-13 | 2015-11-18 | 国家电网公司 | Fault processing method based on multistage extreme difference protection and power distribution network automation system |
| CN106655122A (en)* | 2016-12-13 | 2017-05-10 | 国网山东省电力公司电力科学研究院 | Multilevel differential protection system and method of power distribution overhead-cable mixed lines |
| CN108988303A (en)* | 2018-07-19 | 2018-12-11 | 西安交通大学 | Utilize the adaptive reclosing method of MMC-HVDC DC line of breaker injected pulse signal |
| Title |
|---|
| 带T接分支的电缆-架空线混合线路双端行波故障定位;蔡俊强等;《电工技术》;第37-40+43页* |
| Publication number | Publication date |
|---|---|
| CN110098599A (en) | 2019-08-06 |
| Publication | Publication Date | Title |
|---|---|---|
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