技术领域technical field
本发明涉及电力系统继电保护技术领域，具体涉及一种变电站就地化保护系统。The invention relates to the technical field of electric power system relay protection, in particular to an in-situ protection system for a substation.
背景技术Background technique
目前，智能变电站普遍采用“三层两网”的系统架构，合并单元、智能终端等新IED设备得到广泛应用，安装方式发生了较大变化，在促进智能变电站发展的同时，给二次专业带来了一些新的问题，主要体现在：保护采样、跳闸环节增多、快速性和可靠性降低；网络架构复杂，交换机数量多；装置虚回路配置复杂，对配置接口和文件要求高；安装、调试及检修工作量大。At present, smart substations generally adopt the system architecture of "three layers and two networks". New IED devices such as merging units and smart terminals have been widely used, and the installation methods have undergone major changes. While promoting the development of smart substations, it will bring secondary professional There are some new problems, mainly reflected in: more protection sampling and tripping links, lower speed and reliability; complex network structure, large number of switches; complex virtual circuit configuration of devices, high requirements for configuration interfaces and files; installation and debugging And maintenance workload is large.
近年来，GE公司推出了符合IEC 61850的变电站过程层总线解决方案HardFiberProcess Bus System，该方案的核心是被称为 Bricks的开关场I/O接口设备，Bricks采用户外无防护安装方式，通过电缆完成对一次设备进行所有的测量和控制，并通过光纤与保护控制装置进行数据交换，实现了I/O接口设备的就地化。但保护控制设备本身特别是跨间隔保护仍采用传统的安装方式，没有实现全站二次设备就地化安装。In recent years, GE has launched the HardFiberProcess Bus System, a substation process bus solution that complies with IEC 61850. The core of the solution is the switchyard I/O interface device called Bricks. Bricks are installed outdoors without protection and completed through cables. Perform all measurement and control on the primary equipment, and exchange data with the protection control device through optical fiber, realizing the localization of I/O interface equipment. However, the protection and control equipment itself, especially the cross-interval protection, still adopts the traditional installation method, and the on-site installation of the secondary equipment of the whole station has not been realized.
中国已受理专利201510370184.5“一种面向间隔的多功能纵向集成装置”公开了一种面向间隔的多功能纵向集成装置，具体实现方式是将合并单元、智能终端及保护测控分别采用独立的CPU实现，采用多CPU板卡，保证了多功能的相对独立性。这种方法虽然节省了装置间数据传输时间，但存在板间数据传输延时，因此保护动作时间仍将比常规变电站线路保护慢约3~4ms，同时该方法未提及就地化无防护安装措施，不适于就地化安装。China's accepted patent 201510370184.5 "A Multifunctional Vertical Integration Device Oriented to Interval" discloses a multifunctional vertical integration device oriented to an interval. The use of multiple CPU boards ensures the relative independence of multiple functions. Although this method saves data transmission time between devices, there is a delay in data transmission between boards, so the protection action time will still be about 3~4ms slower than conventional substation line protection. At the same time, this method does not mention on-site unprotected installation Measures, not suitable for local installation.
中国已受理专利201610393714.2“基于双环网的无主式就地化变压器保护装置及保护方法”公开了基于双环网的无主式就地化变压器保护装置及保护方法，具体实现方法是变压器各侧设置保护子机，子机之间通过双环网手拉手连接，共享数据，各子机就地采集本侧模拟量和开关量，进行变压器主、后保护逻辑运算，并直接控制跳开相应的断路器。这种方法没有主机，每个子机对等，每个子机依赖其他子机的数据，存在以下问题，任一子机异常时保护功能将失效，数据采集、保护逻辑运算和跳闸分别由不同装置实现，数据链路长，环节多，可靠性降低。China has accepted the patent 201610393714.2 "Non-hosted localized transformer protection device and protection method based on double-ring network" discloses a non-hosted localized transformer protection device and protection method based on double-ring network. The specific implementation method is to set up on each side of the transformer To protect the sub-units, the sub-units are connected hand-in-hand through the double-loop network to share data. Each sub-unit collects the analog and switch values on the local side, performs the logic operation of the main and rear protection of the transformer, and directly controls the corresponding circuit breaker to trip. . This method has no master, each sub-machine is equal, each sub-machine depends on the data of other sub-machines, there are the following problems, the protection function will be invalid when any sub-machine is abnormal, data collection, protection logic operation and tripping are realized by different devices , the data link is long, there are many links, and the reliability is reduced.
中国已受理专利201611181075.X“就地化继电保护系统”公开了一种就地化继电保护系统，具体实现方法是设置单间隔保护、跨间隔保护和测控自动化装置，单间隔保护装置就地安装，跨间隔保护和测控装置安装于主控室，单间隔保护包括超级采集单元、线路保护、合并单元和智能终端，跨间隔保护由保护主机、单间隔子机、合并单元、智能终端、GOOSE交换机和点对点SV光纤组成。这种实现方法在现有智能变电站基础上增加超级采集单元作为一二次系统间接口，跨间隔实现方式复杂，跨间隔保护主机未能就地化安装。China's accepted patent 201611181075.X "In-situ relay protection system" discloses an in-situ relay protection system. The specific implementation method is to set up single-interval protection, cross-interval protection and measurement and control automation devices. The single-interval protection device is Ground installation, cross-bay protection and measurement and control devices are installed in the main control room, single-bay protection includes super acquisition unit, line protection, merging unit and intelligent terminal, cross-bay protection consists of protection host, single-bay slave, merging unit, smart terminal, Composed of GOOSE switches and point-to-point SV optical fibers. This implementation method adds a super acquisition unit as an interface between the primary and secondary systems on the basis of the existing smart substation. The cross-interval implementation method is complicated, and the cross-interval protection host cannot be installed locally.
发明内容Contents of the invention
本发明的目的在于克服现有技术中的不足，提供了一种变电站就地化保护系统，采用功能纵向集成的单间隔保护、分布式跨间隔保护和双向环形网络，解决智能变电站继电保护系统快速性和可靠性降低的问题，同时可适应多种安装场合和运行环境。The purpose of the present invention is to overcome the deficiencies in the prior art and provide an in-situ substation protection system, which adopts single-bay protection, distributed cross-bay protection and bidirectional ring network with vertically integrated functions to solve the problem of intelligent substation relay protection system. The problems of rapidity and reliability reduction can be adapted to various installation occasions and operating environments at the same time.
为解决上述技术问题，本发明提供了一种变电站就地化保护系统，其特征是，包括功能纵向集成单间隔保护、基于双向环网的分布式跨间隔保护、站域保护和自动化监控装置，单间隔保护和跨间隔保护采用SoC（System on Chip）片上系统、全密封一体成型机箱，实现就地化安装；In order to solve the above technical problems, the present invention provides an in-situ substation protection system, which is characterized in that it includes vertically integrated single-bay protection, distributed cross-bay protection based on bidirectional ring network, station domain protection and automatic monitoring devices, Single-bay protection and cross-bay protection adopt SoC (System on Chip) system on chip and fully sealed integrated chassis to realize local installation;
单间隔保护包括线路、母联和分段保护，跨间隔保护包括变压器和母线保护；Single-bay protection includes line, bus-tie and section protection, and cross-bay protection includes transformer and busbar protection;
在线路、母联和分段就地化配置单间隔保护及公用采集控制终端；在变压器各侧就地化配置公用采集控制终端；在母线和变压器分别就地化配置保护主机；站域保护和自动化监控装置在控制室中集中组屏配置；Locally configure single-bay protection and public collection and control terminals on lines, bus couplers, and sections; localize public collection and control terminals on each side of the transformer; locally configure protection hosts on busbars and transformers; station domain protection and The automatic monitoring device is centrally grouped and configured in the control room;
变压器保护由变压器保护主机和变压器各侧公用采集控制终端组成，变压器保护主机与公用采集控制终端组建变压器保护专用环网连接；母线保护由线路、变压器相应侧、母联和分段的公用采集控制终端与母线保护主机组成，母线保护主机与公用采集控制终端组建母线保护专用环网连接；Transformer protection is composed of transformer protection host and public collection and control terminals on each side of the transformer. Transformer protection host and public collection and control terminals form a special ring network connection for transformer protection; busbar protection is controlled by public collection and control of lines, transformer corresponding sides, bus couplers and sections The terminal is composed of the busbar protection host, and the busbar protection host and the public acquisition control terminal form a dedicated ring network connection for busbar protection;
单间隔保护和跨间隔保护主机与自动化监控装置之间组成监控双向环网连接；Single-interval protection and cross-interval protection hosts and automatic monitoring devices form a monitoring two-way ring network connection;
所有公用采集控制终端与站域保护之间组成保护公用环网连接。All public collection and control terminals form a protection public ring network connection with the station domain protection.
进一步的，母线保护专网和变压器保护专网通过SV和GOOSE报文实现数据共享。Further, the private busbar protection network and the private transformer protection network realize data sharing through SV and GOOSE messages.
进一步的，在监控双向环形网络上，单间隔保护与自动化监控装置通过MMS报文实现监视和控制，单间隔保护与跨间隔保护间通过GOOSE报文实现联动、闭锁。Furthermore, on the monitoring two-way ring network, the single-bay protection and automatic monitoring device realize monitoring and control through MMS messages, and the linkage and blocking between single-bay protection and cross-bay protection are realized through GOOSE messages.
进一步的，保护公用环网通过SV和GOOSE报文实现网采网跳、报文采集和故障记录。Further, the protection of the public ring network implements network sampling and network jumping, message collection and fault recording through SV and GOOSE messages.
进一步的，站域保护同时接入保护公用环网和监控环网。Further, the station domain protection accesses the protection public ring network and the monitoring ring network at the same time.
进一步的，自动化监控装置包括网络记录和故障录波器、监控后台、远动机和保信子站。Further, the automatic monitoring device includes a network recorder and a fault recorder, a monitoring background, a remote machine and a sub-station of Baoxin.
与现有技术相比，本发明所达到的有益效果是：本发明通过单间隔保护功能独立实现，加快保护动作速度，同时提高单间隔保护可靠性；跨间隔保护分布式布置，扩建配置灵活，独立组建专用环网，提高跨间隔保护可靠性。环网的网络架构方案，在实现数据冗余、保证通信可靠性的同时，取消了交换机设备。相比智能变电站取消了全站交换机投资、减少了电缆和光纤、屏柜的数量，就地化安装减少站内建筑物占地面积，实现了变电站安全可靠、经济高效运行。Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention independently realizes the single-interval protection function, speeds up the protection action speed, and improves the reliability of the single-interval protection; Independently set up a dedicated ring network to improve the reliability of cross-interval protection. The network architecture scheme of the ring network eliminates the switch equipment while realizing data redundancy and ensuring communication reliability. Compared with the smart substation, the investment of the whole station switch is canceled, the number of cables, optical fibers and screen cabinets is reduced, and the on-site installation reduces the building area in the station, realizing safe, reliable, economical and efficient operation of the substation.
附图说明Description of drawings
图1为变电站就地化保护系统架构图；Figure 1 is the structure diagram of the substation local protection system;
图2为单间隔保护结构框图；Figure 2 is a block diagram of a single compartment protection structure;
图3为公用采集控制终端结构框图；Fig. 3 is a structural block diagram of a public collection and control terminal;
图4为跨间隔保护结构框图；Fig. 4 is a block diagram of cross-interval protection structure;
图5为变压器保护专用环网架构图；Figure 5 is a structural diagram of a dedicated ring network for transformer protection;
图6为母线保护专用环网架构图；Figure 6 is a diagram of the dedicated ring network architecture for busbar protection;
图7为保护公用环网架构图；Figure 7 is a structure diagram of the protection public ring network;
图8为监控系统环网架构图。Figure 8 is a ring network architecture diagram of the monitoring system.
具体实施方式detailed description
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
如图1所示，本发明的一种变电站就地化保护系统，包括功能纵向集成单间隔保护、基于双向环网的分布式跨间隔保护、站域保护和自动化监控装置，单间隔保护和跨间隔保护就地化安装；As shown in Figure 1, an in-situ substation protection system of the present invention includes vertically integrated single-bay protection, distributed cross-bay protection based on bidirectional ring network, station domain protection and automatic monitoring devices, single-bay protection and cross-bay In-situ installation of interval protection;
单间隔保护包括线路、母联和分段保护，跨间隔保护包括变压器和母线保护；Single-bay protection includes line, bus-tie and section protection, and cross-bay protection includes transformer and busbar protection;
在线路、母联和分段就地化配置单间隔保护及公用采集控制终端；在变压器各侧就地化配置公用采集控制终端；在母线和变压器分别就地化配置保护主机；站域保护和自动化监控装置在控制室中集中组屏配置；Locally configure single-bay protection and public collection and control terminals on lines, bus couplers, and sections; localize public collection and control terminals on each side of the transformer; locally configure protection hosts on busbars and transformers; station domain protection and The automatic monitoring device is centrally grouped and configured in the control room;
变压器保护由变压器保护主机和变压器各侧公用采集控制终端组成，变压器保护主机与公用采集控制终端组建变压器保护专用环网连接；母线保护由线路、变压器相应侧、母联和分段的公用采集控制终端与母线保护主机组成，母线保护主机与公用采集控制终端组建母线保护专用环网连接；Transformer protection is composed of transformer protection host and public collection and control terminals on each side of the transformer. Transformer protection host and public collection and control terminals form a special ring network connection for transformer protection; busbar protection is controlled by public collection and control of lines, transformer corresponding sides, bus couplers and sections The terminal is composed of the busbar protection host, and the busbar protection host and the public acquisition control terminal form a dedicated ring network connection for busbar protection;
单间隔保护和跨间隔保护主机与自动化监控装置之间组成监控双向环网连接；Single-interval protection and cross-interval protection hosts and automatic monitoring devices form a monitoring two-way ring network connection;
所有公用采集控制终端与站域保护之间组成保护公用环网连接。All public collection and control terminals form a protection public ring network connection with the station domain protection.
以上所述的自动化监控装置包括现有技术中网络记录和故障录波器、监控后台、远动机和保信子站等。The above-mentioned automatic monitoring device includes network recorder and fault recorder, monitoring background, remote machine and sub-station of Baoxin in the prior art.
单间隔保护实施例如下：在各线路、母联和分段处各配置一台单间隔保护装置，安装于户外接线端子线附件支架上。单间隔保护集成保护、合并单元和智能终端功能，为功能纵向集成。具有模拟量采集、保护逻辑运算、开入开出和SV、GOOSE通信功能，直接电缆采样电缆跳闸，能独立反应被保护对象的各种类型故障，装置由SOC片上系统和外围芯片配合实现，采用航空插头，适于就地化无防护安装。The implementation of single-compartment protection is as follows: a single-compartment protection device is installed at each line, bus coupler and section, and installed on the accessory bracket of the outdoor terminal line. Single compartment protection integrates protection, merging unit and intelligent terminal functions, which is vertical integration of functions. It has analog quantity acquisition, protection logic operation, input and output, SV, GOOSE communication functions, direct cable sampling and cable tripping, and can independently respond to various types of faults of the protected object. The device is realized by SOC system on chip and peripheral chips. Aviation plug, suitable for local unprotected installation.
如图2所示，单间隔保护装置设有环网接口、光IRIG-B模块、通信FPGA、采样FPGA、SOC、模拟量输入模块、开入模块和开出模块；模拟量输入模块接入采样FPGA，光IRIG-B模块、采样FPGA、通信FPGA、开入模块、开出模块均接入SOC， SOC片上系统中包含保护启动DSP1、保护出口DSP2和管理CPU1，DSP1完成保护出口逻辑运算，DSP2完成保护启动逻辑运算，启动和动作逻辑均满足时通过开出模块发出跳闸信号，管理CPU1完成保护定值管理、内部模块管理功能。装置至少具有一个环网接口，接入监控双向环网。光IRIG-B接口连接至FPGA，接收外部对时信号，FPGA解析卫星对时信息，生成时间同步信息，并产生内部模块间同步信号，实现装置时钟同步。装置通过电缆接入一次互感器，然后通过模拟量输入模块完成信号调理和A/D转换，A/D转换频率为4000Hz，A/D信号由采集FPGA控制，转换后的数据搬移至采集FPGA缓存，保护启动和动作分别由2片不同的A/D芯片采集。DSP1通过内部高速总线读写开入开出模块，开入开出通过电缆接入一次开关和刀闸接线端子箱。DSP1和DSP2从管理CPU1获取保护定值，根据电压和电流采样值，进行保护启动、动作逻辑运算，向开出模块发出跳闸信号，并产生保护事件。通信FPGA作为通信接口的一部分，具有MMS、GOOSE和SV通信报文组织，网络任务调度、风暴过滤、流量控制和MAC功能，与SoC片上系统实现数据交互。As shown in Figure 2, the single-bay protection device is equipped with a ring network interface, optical IRIG-B module, communication FPGA, sampling FPGA, SOC, analog input module, input module and output module; the analog input module is connected to the sampling FPGA, optical IRIG-B module, sampling FPGA, communication FPGA, input module, and output module are all connected to SOC. The SOC system includes protection start DSP1, protection exit DSP2 and management CPU1. DSP1 completes the logic operation of protection exit, and DSP2 Complete the protection start logic operation, when the start and action logic are satisfied, the trip signal is sent through the output module, and the management CPU1 completes the protection fixed value management and internal module management functions. The device has at least one ring network interface, which is connected to the monitoring bidirectional ring network. The optical IRIG-B interface is connected to the FPGA to receive external time synchronization signals. The FPGA analyzes the satellite time synchronization information, generates time synchronization information, and generates internal inter-module synchronization signals to achieve device clock synchronization. The device is connected to the primary transformer through the cable, and then completes signal conditioning and A/D conversion through the analog input module. The A/D conversion frequency is 4000Hz. The A/D signal is controlled by the acquisition FPGA, and the converted data is moved to the acquisition FPGA buffer. , Protection start and action are collected by 2 different A/D chips respectively. DSP1 reads and writes the input and output module through the internal high-speed bus, and the input and output is connected to the primary switch and the knife terminal box through the cable. DSP1 and DSP2 obtain the protection setting value from the management CPU1, perform protection start-up and action logic operations according to the voltage and current sampling values, send a trip signal to the output module, and generate protection events. As a part of the communication interface, the communication FPGA has MMS, GOOSE and SV communication message organization, network task scheduling, storm filtering, flow control and MAC functions, and realizes data interaction with the SoC system on chip.
公共采集控制终端作为跨间隔保护主机、站域保护和自动化监控装置的公用采集控制终端，设有多组环网端口适应以上应用，具有模拟量、状态量采集及控制功能，直接电缆采样电缆跳闸，按间隔配置，与单间隔保护独立，装置由SOC片上系统和外围芯片配合实现，采用航空插头，适于就地化无防护安装。The public collection and control terminal is used as a public collection and control terminal for cross-interval protection hosts, station domain protection and automatic monitoring devices. It is equipped with multiple sets of ring network ports to adapt to the above applications. It has analog and state quantity collection and control functions, and direct cable sampling cable tripping , Configured according to intervals, independent of single-interval protection, the device is realized by SOC system on chip and peripheral chips, using aviation plugs, suitable for on-site installation without protection.
如图3所示，公用采集控制终端由环网接口、光IRIG-B模块、通信FPGA、采样FPGA、SOC、模拟量输入模块、开入模块和开出模块组成，模拟量输入模块接入采样FPGA，光IRIG-B模块、采样FPGA、通信FPGA、开入模块、开出模块均接入SOC，SOC片上系统中包含运算DSP3、管理CPU2，运算DSP3完成采样值处理，管理CPU2完成装置参数管理、内部模块管理功能。环网模块至少具有两个环网接口，分别接入上述系统内跨间隔保护专网（包括变压器专网和母线专网）和保护公用双向环网。光IRIG-B接口连接至FPGA，接收外部对时信号，FPGA解析卫星对时信息，生成时间同步信息，并产生内部模块间同步信号，实现装置时钟同步。装置通过电缆接入一次互感器，然后通过模拟量输入模块完成信号调理和A/D转换，A/D转换频率为4000Hz，A/D信号由采集FPGA控制，转换后的数据搬移至采集FPGA缓存，保护启动和动作分别由2片不同的A/D芯片采集。DSP3通过内部高速总线读写开入开出模块，开入开出通过电缆接入一次开关和刀闸接线端子箱。通信FPGA作为通信接口的一部分，具有MMS、GOOSE和SV通信报文组织，网络任务调度、风暴过滤、流量控制和MAC功能，与SoC片上系统实现数据交互。As shown in Figure 3, the public acquisition and control terminal is composed of a ring network interface, an optical IRIG-B module, a communication FPGA, a sampling FPGA, a SOC, an analog input module, an input module, and an output module. The analog input module is connected to the sampling FPGA, optical IRIG-B module, sampling FPGA, communication FPGA, input module, and output module are all connected to SOC. The SOC system includes computing DSP3 and management CPU2. The computing DSP3 completes sampling value processing, and management CPU2 completes device parameter management. , Internal module management function. The ring network module has at least two ring network interfaces, which are respectively connected to the inter-interval protection private network (including transformer private network and busbar private network) and the protection public bidirectional ring network in the above-mentioned system. The optical IRIG-B interface is connected to the FPGA to receive external time synchronization signals. The FPGA analyzes the satellite time synchronization information, generates time synchronization information, and generates internal inter-module synchronization signals to achieve device clock synchronization. The device is connected to the primary transformer through the cable, and then completes signal conditioning and A/D conversion through the analog input module. The A/D conversion frequency is 4000Hz. The A/D signal is controlled by the acquisition FPGA, and the converted data is moved to the acquisition FPGA buffer. , Protection start and action are collected by 2 different A/D chips respectively. DSP3 reads and writes the input and output module through the internal high-speed bus, and the input and output is connected to the primary switch and the knife terminal box through the cable. As a part of the communication interface, the communication FPGA has MMS, GOOSE and SV communication message organization, network task scheduling, storm filtering, flow control and MAC functions, and realizes data interaction with the SoC system on chip.
公用采集控制终端应用至变压器各侧时，可配置1台公用采集控制终端，具有至少3个环网接口，分别接入母线保护专用环网、变压器保护专用环网和保护公用环网，也可以配置2台公用采集控制终端，每台具有至少2个环网接口，每台一个环网接口分别接入母线保护及变压器保护专用环网，另一个环网接口同时接入保护公用环网。When the public collection and control terminal is applied to each side of the transformer, one public collection and control terminal can be configured, with at least 3 ring network interfaces, respectively connected to the bus protection dedicated ring network, transformer protection dedicated ring network and protection public ring network. Configure 2 public collection and control terminals, each with at least 2 ring network interfaces, each with one ring network interface connected to the dedicated ring network for busbar protection and transformer protection, and the other ring network interface connected to the protection public ring network at the same time.
跨间隔保护主机（变压器保护主机和母线保护主机的统称）设有多组双向环网接口，接收子网内公用采集控制终端的GOOSE、SV报文，完成数据同步，实现保护逻辑运算，向子机发送GOOSE报文，同时主机可通过环网端口与其它保护交互失灵启动、失灵联跳等信息。The cross-interval protection host (collectively referred to as transformer protection host and busbar protection host) is equipped with multiple sets of bidirectional ring network interfaces to receive GOOSE and SV messages from public collection and control terminals in the subnet, complete data synchronization, and realize protection logic operations. The host computer sends GOOSE messages, and at the same time, the host computer can interact with other protections through the ring network port, such as failure start, failure joint jump and other information.
如图4所示，跨间隔保护主机设有环网接口、光IRIG-B模块、通信FPGA、SOC、开入模块和开出模块，光IRIG-B模块、通信FPGA、开入模块、开出模块均接入SOC，SoC包含保护启动DSP4、保护出口DSP5和管理CPU3，DSP4完成保护启动逻辑运算，DSP5完成保护出口逻辑运算，启动和动作逻辑均满足时通过开出模块发出跳闸信号，管理CPU3完成保护定值、装置参数、模块管理。DSP4通过内部高速总线读写开入开出模块，开入开出用于压板采集和告警节点输出。光IRIG-B接口连接至FPGA，接收外部对时信号，FPGA解析卫星对时信息，生成时间同步信息，并产生内部模块间同步信号，实现装置时钟同步。通信FPGA介于环网接口和SoC之间，作为通信接口的一部分，具有MMS、GOOSE和SV通信报文组织，网络任务调度、风暴过滤、流量控制和MAC功能，与SoC片上系统实现数据交互。装置至少具有两个环网接口，分别接入上述系统内跨间隔专网和监控环网，通过跨间隔专网接收SV采样值，收发GOOSE信号，通过监控环网收发保护间联闭锁GOOSE信息和MMS监控信息。As shown in Figure 4, the cross-interval protection host is equipped with ring network interface, optical IRIG-B module, communication FPGA, SOC, input module and output module, optical IRIG-B module, communication FPGA, input module, output module All modules are connected to SOC, SoC includes protection start DSP4, protection exit DSP5 and management CPU3, DSP4 completes protection start logic operation, DSP5 completes protection exit logic operation, when the start and action logic are satisfied, the module sends a trip signal to manage CPU3 Complete protection setting, device parameters, and module management. DSP4 reads and writes the input and output module through the internal high-speed bus, and the input and output are used for platen acquisition and alarm node output. The optical IRIG-B interface is connected to the FPGA to receive external time synchronization signals. The FPGA analyzes the satellite time synchronization information, generates time synchronization information, and generates internal inter-module synchronization signals to achieve device clock synchronization. The communication FPGA is between the ring network interface and the SoC. As a part of the communication interface, it has MMS, GOOSE and SV communication message organization, network task scheduling, storm filtering, flow control and MAC functions, and realizes data interaction with the SoC system on chip. The device has at least two ring network interfaces, which are respectively connected to the inter-interval private network and the monitoring ring network in the above-mentioned system, receive SV sampling values through the inter-interval private network, send and receive GOOSE signals, and send and receive protection interlocking GOOSE information and MMS monitoring information.
本发明的保护系统包含三个相互独立的双向环形网络，可根据变电站规模及设备类型，划分成多个相互解耦的子环网，平衡每个子环网内节点数量，有效减少网络传输延时，利于间隔的灵活扩展，具体如下：The protection system of the present invention includes three mutually independent bidirectional ring networks, which can be divided into multiple decoupled sub-ring networks according to the scale of the substation and the type of equipment, so as to balance the number of nodes in each sub-ring network and effectively reduce network transmission delay , which is conducive to the flexible expansion of the interval, as follows:
一、跨间隔保护专用双向环形网络，包括母线保护专网和变压器保护专网，通过IEC61850-9-2 SV和GOOSE报文实现数据共享；1. Special two-way ring network for cross-interval protection, including bus protection private network and transformer protection private network, and realizes data sharing through IEC61850-9-2 SV and GOOSE messages;
二、间隔保护、跨间隔保护和自动化监控装置组成监控双向环形网络，在此环网上，保护装置与自动化监控装置通过MMS报文实现监视和控制，间隔保护与跨间隔保护间通过GOOSE报文实现联动、闭锁；2. Interval protection, cross-interval protection and automatic monitoring devices form a monitoring two-way ring network. On this ring network, the protection device and automatic monitoring device realize monitoring and control through MMS messages, and the inter-interval protection and cross-interval protection are realized through GOOSE messages. Linkage, locking;
三、公用采集控制终端、站域保护组成保护公用双向环网，通过IEC 61850-9-2 SV和GOOSE报文实现网采网跳、报文采集和故障记录功能。3. The public collection control terminal and station domain protection form a protected public bidirectional ring network, and realize the functions of network sampling, network jumping, message collection and fault recording through IEC 61850-9-2 SV and GOOSE messages.
下面对各双向环网进行详细介绍：The following is a detailed introduction to each bidirectional ring network:
变压器保护如图5所示，包括：在变压器三侧（高压侧、中压侧和低压侧）各配置一个公用采集控制终端，配置一台变压器保护主机，均安装于户外接线端子线附件支架上，公用采集控制终端接入一次CT、PT、开入、开出电缆回路，变压器保护主机接入压板、告警节点电缆，各公用采集控制终端和变压器保护主机接入变压器保护专用环网，公用采集控制终端同时接入保护公用双向环网，接入站内IRIG-B对时光纤。Transformer protection is shown in Figure 5, including: a public collection and control terminal is installed on the three sides of the transformer (high voltage side, medium voltage side and low voltage side), and a transformer protection host is installed on the outdoor terminal line accessory bracket , the public acquisition control terminal is connected to the primary CT, PT, open-in, open-out cable loop, the transformer protection host is connected to the pressure plate and the alarm node cable, and each public acquisition control terminal and transformer protection host are connected to the dedicated ring network for transformer protection. The control terminal is connected to the protection public bidirectional ring network at the same time, and connected to the IRIG-B time synchronization fiber in the station.
母线保护如图6所示，包括：在各线路、母联或分段处各配置一台公用采集控制终端，配置一台母线保护主机，均安装于户外接线端子线附件支架上，公用采集控制终端接入一次CT、PT、开入、开出电缆回路，母线保护主机接入压板、告警节点电缆，线路、变压器单侧、母联或分段公用采集控制终端和母线保护主机接入母线保护专用环网，公用采集控制终端同时接入保护公用双向环网，接入站内IRIG-B对时光纤。The busbar protection is shown in Figure 6, including: one public acquisition control terminal is installed at each line, bus coupler or section, and one busbar protection host is installed on the accessory bracket of the outdoor terminal line. The terminal is connected to the primary CT, PT, open-in, open-out cable circuit, the busbar protection host is connected to the pressure plate and the alarm node cable, and the line, transformer single side, bus coupler or section public acquisition control terminal and the busbar protection host are connected to the busbar protection Dedicated ring network, public collection and control terminals are connected to the protected public bidirectional ring network at the same time, and connected to the IRIG-B time synchronization fiber in the station.
保护公用环网如图7所示，站内各电压等级线路、母联、变压器各侧公用采集控制终端和站域保护组成保护公用环网。The protection public ring network is shown in Figure 7. The lines of various voltage levels in the station, the bus coupler, the public collection and control terminals on each side of the transformer and the station domain protection form the protection public ring network.
监控环网如图8所示，自动化监控装置、线路保护、母线保护主机、线路保护主机、母联保护和站域保护组成监控环网。The monitoring ring network is shown in Figure 8. The automatic monitoring device, line protection, busbar protection master, line protection master, bus tie protection and station domain protection form a monitoring ring network.
本发明的有益效果为：The beneficial effects of the present invention are:
本发明通过单间隔保护功能独立实现，加快保护动作速度，同时提高单间隔保护可靠性；跨间隔保护分布式布置，扩建配置灵活，独立组建专用环网，提高跨间隔保护可靠性。环网的网络架构方案，在实现数据冗余、保证通信可靠性的同时，取消了交换机设备。相比智能变电站取消了全站交换机投资、减少了电缆和光纤、屏柜的数量，就地化安装减少站内建筑物占地面积。实现了变电站安全可靠、经济高效运行。The invention independently realizes the single-interval protection function, accelerates the protection action speed, and improves the reliability of the single-interval protection; the cross-interval protection is distributed and arranged, the expansion and configuration are flexible, and a dedicated ring network is independently formed to improve the reliability of the inter-interval protection. The network architecture scheme of the ring network eliminates the switch equipment while realizing data redundancy and ensuring communication reliability. Compared with the smart substation, the investment of the whole station switch is canceled, the number of cables, optical fibers and screen cabinets is reduced, and the on-site installation reduces the floor area of the building in the station. The safe, reliable, economical and efficient operation of the substation has been realized.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201710706886.5ACN107681642B (en) | 2017-08-17 | 2017-08-17 | A kind of substation's site protection system |
| Application Number | Priority Date | Filing Date | Title |
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| CN201710706886.5ACN107681642B (en) | 2017-08-17 | 2017-08-17 | A kind of substation's site protection system |
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| CN107681642Atrue CN107681642A (en) | 2018-02-09 |
| CN107681642B CN107681642B (en) | 2019-07-23 |
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| CN201710706886.5AActiveCN107681642B (en) | 2017-08-17 | 2017-08-17 | A kind of substation's site protection system |
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