技术领域technical field
本发明涉及一种电力系统保护系统，特别是一种数字化变电站的继电保护系统。The invention relates to a power system protection system, in particular to a digital substation relay protection system.
背景技术Background technique
现有技术的数字化变电站有以下两种结构模式：1.数字式合并单元+智能终端+纯数字式保护装置(采样值SV和面向通用对象的变电站事件Goose跳闸)，2.传统采样合并单元+智能终端+纯数字式保护装置。现场应用主要采用主控室+就地柜组合方式，主控室内安装保护装置，就地柜内安装合并单元和智能终端，主控室与电力机房类似，对主控室的IP防护等级(INGRESS PROTECTION防护等级系统)要求不高，一般IP20即可，要求不超过55℃工作环境。就地柜设置在户外，对其的IP防护等级要求比较高，通常为IP65，一般会设有空调机，合并单元和智能终端的防护等级要求为IP42，需要满足不超过85℃高温的工作环境。The existing digital substation has the following two structural modes: 1. Digital merging unit + intelligent terminal + pure digital protection device (sampling value SV and general object-oriented substation event Goose trip), 2. Traditional sampling merging unit + Intelligent terminal + pure digital protection device. On-site application mainly adopts the combination of main control room + on-site cabinet. The main control room is equipped with protection devices, and the on-site cabinet is installed with merging units and intelligent terminals. The main control room is similar to the power room. The IP protection level of the main control room (INGRESS PROTECTION protection level system) is not demanding, generally IP20 is enough, and the working environment is required not to exceed 55°C. The local cabinet is installed outdoors, and its IP protection level is relatively high, usually IP65, and it is usually equipped with an air conditioner. The protection level of the merging unit and the intelligent terminal is IP42, which needs to meet the working environment of a high temperature of no more than 85°C .
现有技术的数字化变电站的结构在实际使用中存在以下不足：安装在就地柜的合并单元、智能终端装置发热量大，光纤数量多，导致可靠性下降。The structure of the existing digital substation has the following disadvantages in actual use: the merging unit installed in the local cabinet, the intelligent terminal device generates a lot of heat, and the number of optical fibers is large, resulting in a decrease in reliability.
发明内容Contents of the invention
本发明的目的是提供一种就地化继电保护系统，要解决的技术问题是提高数字化变电站的可靠性。The purpose of the present invention is to provide an in-situ relay protection system, and the technical problem to be solved is to improve the reliability of the digital substation.
本发明采用以下技术方案：一种就地化继电保护系统，设有单间隔保护装置、跨间隔保护装置和测控自动化装置，所述单间隔保护装置就地设置，跨间隔保护装置和测控自动化装置设置在数字化变电站的主控室内，单间隔保护装置与主控室之间通过百兆光纤通信。The present invention adopts the following technical solutions: an in-situ relay protection system, which is provided with a single-interval protection device, a cross-interval protection device, and a measurement and control automation device. The device is installed in the main control room of the digital substation, and the single-interval protection device communicates with the main control room through 100M optical fiber.
本发明的单间隔保护装置中，直接与一次设备电缆连接的超级采集单元放在户外柜内，线路保护、母差子机、合并单元和智能终端通过光纤放在户外柜外面。In the single-interval protection device of the present invention, the super acquisition unit directly connected with the primary equipment cable is placed in the outdoor cabinet, and the line protection, master and sub-units, merging unit and intelligent terminal are placed outside the outdoor cabinet through optical fibers.
本发明的超级采集单元连接有母差子机、B码光串、线路保护、合并单元、智能终端、线路保护的电流电压采集单元、母差子机的电流电压采集单元、合并单元的电流电压采集单元、开入量采集单元、开出量采集单元和变压器油温、档位的直流量采集单元；所述超级采集单元、线路保护的电流电压采集单元、母差子机的电流电压采集单元、合并单元的电流电压采集单元、开入量采集单元、开出量采集单元和直流量采集单元设置在靠近一次设备放置的户外柜内；所述线路保护、合并单元、智能终端和母差子机在户外柜外壁上就地设置；所述超级采集单元分别经千兆光纤与线路保护、合并单元、智能终端和母差子机通信连接；所述线路保护、合并单元、智能终端和母差子机分别经百兆光纤与设置在数字化变电站的主控室通信连接。The super acquisition unit of the present invention is connected with a master differential sub-unit, a B-code optical string, a line protection, a merging unit, an intelligent terminal, a current and voltage acquisition unit for line protection, a current and voltage acquisition unit of a main differential sub-unit, and the current and voltage of the merging unit Acquisition unit, binary input acquisition unit, binary output acquisition unit, DC flow acquisition unit for transformer oil temperature and gear position; the super acquisition unit, current and voltage acquisition unit for line protection, and current and voltage acquisition unit for main differential sub-machine The current and voltage acquisition unit, binary input acquisition unit, binary output acquisition unit and DC flow acquisition unit of the merging unit are arranged in an outdoor cabinet placed close to the primary equipment; the line protection, merging unit, intelligent terminal and bus differential The machine is set on-site on the outer wall of the outdoor cabinet; the super acquisition unit communicates with the line protection, merging unit, intelligent terminal, and bus differential sub-machine respectively through gigabit optical fibers; the line protection, merging unit, intelligent terminal, and bus differential The sub-machines are respectively connected to the main control room installed in the digital substation via 100M optical fiber.
本发明的跨间隔保护装置包括母差保护装置和主变保护装置。The inter-bay protection device of the present invention includes a bus differential protection device and a main transformer protection device.
本发明的线路保护设有线路保护现场可编程门阵列和以太网收发器1,线路保护现场可编程门阵列与主控室测控自动化装置和跨间隔保护装置通信经以太网收发器1分别采用MMS和Goose报文，所述以太网收发器1中设有至少两个收发MMS报文的百兆光纤接口和至少两个收发Goose报文的百兆光纤接口，所述线路保护现场可编程门阵列连接有两路E1、B码光纤接口1、CPU1、CPU2和千兆光模块1。The line protection of the present invention is equipped with a line protection field programmable gate array and an Ethernet transceiver 1, and the line protection field programmable gate array communicates with the measurement and control automation device in the main control room and the cross-interval protection device through the Ethernet transceiver 1 respectively using MMS and Goose messages, the Ethernet transceiver 1 is provided with at least two 100M fiber interfaces for sending and receiving MMS messages and at least two 100M fiber interfaces for sending and receiving Goose messages, and the line protection field programmable gate array There are two channels of E1, B code fiber interface 1, CPU1, CPU2 and Gigabit optical module 1 connected.
本发明的合并单元设有合并单元保护现场可编程门阵列和以太网收发器2，合并单元现场可编程门阵列与主控室的跨间隔保护装置通信经百兆光纤按采样数据点对点传输，所述以太网收发器2设有1～8个采样数据百兆光纤接口，所述合并单元现场可编程门阵列级连接有CPU3、千兆光模块2和B码光纤接口2。The merging unit of the present invention is provided with a merging unit to protect the field programmable gate array and the Ethernet transceiver 2, and the merging unit field programmable gate array communicates with the cross-interval protection device in the main control room and transmits the sampling data point-to-point through the 100M optical fiber. The Ethernet transceiver 2 is provided with 1 to 8 sampling data 100M optical fiber interfaces, and the merging unit is connected with a CPU 3 , a gigabit optical module 2 and a B-code optical fiber interface 2 at the field programmable gate array level.
本发明的智能终端设有智能终端现场可编程门阵列和以太网收发器3，现场可编程门阵列与主控室的测控自动化装置通信经以太网收发器3采用Goose报文，所述以太网收发器3设有1～8个收发Goose报文的百兆光纤接口，所述智能终端现场可编程门阵列连接有CPU4、千兆光模块3和B码光纤接口3。The intelligent terminal of the present invention is provided with an intelligent terminal field programmable gate array and an Ethernet transceiver 3, and the communication between the field programmable gate array and the measurement and control automation device in the main control room adopts Goose messages through the Ethernet transceiver 3, and the Ethernet The transceiver 3 is provided with 1 to 8 100-megabit optical fiber interfaces for sending and receiving Goose messages, and the field programmable gate array of the intelligent terminal is connected with a CPU 4 , a gigabit optical module 3 and a B-code optical fiber interface 3 .
本发明的母差子机设有母差子机现场可编程门阵列和私有协议模块，母差子机现场可编程门阵列通过私有协议与主控室通信，所述母差子机现场可编程门阵列连接有千兆光模块5、CPU6和B码光纤接口5。The master differential sub-machine of the present invention is provided with a field programmable gate array of a female differential sub-machine and a private protocol module. The field programmable gate array of a female differential sub-machine communicates with the main control room through a private protocol. The gate array is connected with a gigabit optical module 5, a CPU 6 and a B-code optical fiber interface 5.
本发明在110kV以下电压等级的数字化变电站中，合并单元与智能终端集成为合智装置。In the present invention, in a digital substation with a voltage level below 110kV, the merging unit and the intelligent terminal are integrated into a combined intelligent device.
本发明的合智装置设有合智装置现场可编程门阵列和以太网收发器4，合智装置现场可编程门阵列与主控室的跨间隔保护装置通信经百兆光纤按采样数据点对点传输，所述以太网收发器4设有1～8个采样数据百兆光纤接口，合智装置现场可编程门阵列与主控室测控自动化装置通信经以太网收发器4采用Goose报文，以太网收发器4设有1～8个收发Goose报文的百兆光纤接口，所述合智装置现场可编程门阵列连接有千兆光模块4接、CPU5处和B码光纤接口4。The Hezhi device of the present invention is provided with a Hezhi device field programmable gate array and an Ethernet transceiver 4, and the Hezhi device Field Programmable Gate Array communicates with the cross-interval protection device in the main control room and transmits the sampling data point-to-point through a 100M optical fiber. , the Ethernet transceiver 4 is provided with 1 to 8 sampling data 100M optical fiber interfaces, and the field programmable gate array of the Hezhi device communicates with the measurement and control automation device in the main control room. The Ethernet transceiver 4 adopts Goose messages, and the Ethernet The transceiver 4 is provided with 1 to 8 100-megabit optical fiber interfaces for sending and receiving Goose messages, and the field programmable gate array of the Hezhi device is connected with a gigabit optical module 4, a CPU 5 and a B-code optical fiber interface 4.
本发明与现有技术相比，将线路保护、合并单元、智能终端、母差子机就地布置，跨间隔保护装置和测控自动化装置设置在主控室内，单间隔保护装置与主控室通过光纤通信，节省了大量电缆，节省了部分光纤，就地布置的系统，端接在户外柜内安装，方便布线和接线，发热大的装置安装在户外柜外，通过其本身的外壳直接自然散热，户外柜发热降低，不再需要空调机，降低了继电保护成本，提高了系统的可靠性，并且方便运维。Compared with the prior art, the present invention arranges the line protection, the merging unit, the intelligent terminal, and the bus and sub-units on the spot; Optical fiber communication saves a lot of cables and some optical fibers. The system arranged on site is terminated and installed in the outdoor cabinet, which is convenient for wiring and wiring. The device with large heat generation is installed outside the outdoor cabinet and directly and naturally dissipates heat through its own shell. , The heat generated by the outdoor cabinet is reduced, the air conditioner is no longer needed, the cost of relay protection is reduced, the reliability of the system is improved, and it is convenient for operation and maintenance.
附图说明Description of drawings
图1是互感器采样的超级采集单元结构框图。Figure 1 is a structural block diagram of the super acquisition unit for transformer sampling.
图2是数字化互感器采样超级采集单元结构框图。Figure 2 is a structural block diagram of the digital transformer sampling super acquisition unit.
图3是本发明在户外柜布置的结构框图。Fig. 3 is a structural block diagram of the present invention arranged in an outdoor cabinet.
图4是本发明的整体设置示意图。Fig. 4 is a schematic diagram of the overall arrangement of the present invention.
图5是本发明的线路保护结构框图。Fig. 5 is a block diagram of the line protection structure of the present invention.
图6是本发明的合并单元结构框图。Fig. 6 is a structural block diagram of the merging unit of the present invention.
图7是本发明的智能终端结构框图。Fig. 7 is a structural block diagram of the intelligent terminal of the present invention.
图8是本发明的合并单元和智能装置结构框图。Fig. 8 is a structural block diagram of the merging unit and the intelligent device of the present invention.
图9是本发明的母差子机结构框图。Fig. 9 is a block diagram of the structure of the master and slave units of the present invention.
具体实施方式detailed description
下面结合附图和实施例对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
如图1所示，互感器采样的超级采集单元用于数字化变电站，采用主控室+就地柜的组合方式。就地柜设有现场可编程门阵列FPGA，FPGA连接有千兆光模块1～4、B码光纤串行通信接口(B码光串)和单片机，FPGA经滤波电路连接有线路保护装置(线路保护)的电流电压采集单元CT/PT(CT/PT 1#)、母差保护装置子机(Bus Differential Protection SubUnit，母差子机)的电流电压采集单元CT/PT(CT/PT 2#)、线路间隔和主变高压侧合并单元(合并单元)的电流电压采集单元CT/PT(CT/PT 3#)、采集变压器油温、档位的直流量采集单元，FPGA经开入隔离电路连接有开入量采集单元，经开出隔离电路连接有开出量采集单元。单片机连接开出隔离电路和调试串行通信接口(调试串口)。千兆光模块1～4用于发送端把电信号转换成光信号，通过光纤光传送到主控室。As shown in Figure 1, the super acquisition unit for transformer sampling is used in digital substations, and the combination of main control room + local cabinet is adopted. The local cabinet is equipped with a field programmable gate array FPGA, and the FPGA is connected with gigabit optical modules 1 to 4, B-code optical fiber serial communication interface (B-code optical string) and a single-chip microcomputer, and the FPGA is connected with a line protection device (line Protection) current and voltage acquisition unit CT/PT (CT/PT 1#), bus differential protection subunit (Bus Differential Protection SubUnit, bus differential subunit) current and voltage acquisition unit CT/PT (CT/PT 2#) , the line interval and the current and voltage acquisition unit CT/PT (CT/PT 3#) of the merging unit (merging unit) on the high-voltage side of the main transformer, the DC flow acquisition unit for acquiring transformer oil temperature and gear position, and the FPGA is connected through the input isolation circuit There is a binary input quantity acquisition unit, and a binary output quantity acquisition unit is connected through a binary output isolation circuit. The MCU is connected to the isolation circuit and the debugging serial communication interface (debugging serial port). Gigabit optical modules 1 to 4 are used at the sending end to convert electrical signals into optical signals and transmit them to the main control room through optical fiber.
滤波电路采用两级无源RC滤波电路，截止频率为2KHz，用于滤除高频干扰，保护、测量需要的更低的截止频率由FPGA及其系统实现。The filter circuit adopts a two-stage passive RC filter circuit with a cut-off frequency of 2KHz, which is used to filter out high-frequency interference. The lower cut-off frequency required for protection and measurement is realized by FPGA and its system.
超级采集单元采用FPGA和单片机构成，将采集到的模拟量和开关量信号转换为符合千兆光纤接口格式的报文数据。FPGA和单片机连接至千兆光模块，对线路保护、母差子机的保护系统解耦，因此可以一次配置，只要与其连接的互感器、刀闸、断路器一次设备不失效，后续免升级免维护。单片机实现对1A/5A互感器、110V/220V开关量输入的配置管理和调试，可以采用普通ARMCortexM0级别的单片机。The super acquisition unit is composed of FPGA and single-chip microcomputer, which converts the collected analog and switch signals into message data conforming to the gigabit optical fiber interface format. The FPGA and MCU are connected to the gigabit optical module to decouple the line protection and the protection system of the mother-interface and sub-units, so it can be configured at one time. As long as the transformers, switches, and circuit breakers connected to it are not invalid, subsequent upgrades are free. maintain. The single-chip microcomputer realizes the configuration management and debugging of 1A/5A transformer and 110V/220V switch input, and ordinary ARMCortexM0-level single-chip microcomputer can be used.
电流互感器CT信号采用双模拟信号转换成数字信号AD配置，可以提高整体可靠性，AD选用美国ADI公司的AD7606芯片，具有8通道同步采样，单5V供电，可以简化了电源配置。开入隔离电路采用光耦隔离，开出隔离电路采用继电器隔离。The CT signal of the current transformer is converted into a digital signal by dual analog signals into a digital signal AD configuration, which can improve the overall reliability. The AD uses the AD7606 chip of the American Analog Devices Company, which has 8-channel synchronous sampling and a single 5V power supply, which can simplify the power supply configuration. The input isolation circuit adopts optocoupler isolation, and the output isolation circuit adopts relay isolation.
采集交流信息的电流互感器CT、电压互感器PT采用模拟量，采样合并单元与电子式互感器的合并单元依靠千兆光模块1～4与主控室内的线路保护、合并单元、电力系统的智能终端(智能终端，Smart Terminal电力系统的智能终端用于数字化变电站，接收Goose报文，控制断路器、刀闸的分合)、母差子机进行数据传输。The current transformer CT and voltage transformer PT that collect AC information use analog quantities, and the sampling and merging unit and the merging unit of the electronic transformer rely on gigabit optical modules 1 to 4 and the line protection in the main control room, the merging unit, and the power system. Smart terminals (smart terminals, smart terminals of the Smart Terminal power system are used in digital substations, receive Goose messages, control the opening and closing of circuit breakers and knife switches), and the bus and sub-machines for data transmission.
就地柜的主要发热源头是光模块，每路百兆光模块的功耗在1W左右。为降低功耗，现有技术采用的单片机+FPGA+光模块结构，用FPGA直接驱动光模块，光模块选择千兆位电信号转换为光信号的接口器件SFP或小型化光纤连接器件SFF，功耗最低可以到0.3W以下，FPGA选用低功耗产品，例如美国阿尔卡特Altera公司的MAX10系列，美国莱迪思Lattice公司的MathXO2系列，美国爱特Actel公司的IGLOO2系列。单片机做配置管理和调试。按采集36路交流模拟量，控制100路输入输出IO，对外提供4对千兆接口来计算，整体功耗可以控制在单片机0.2W+FPGA 0.5W+光模块4×0.3W＝1.9W，假设电源损耗80％，整体功耗可以控制在2.5W以下。随着光模块数量增多，每路只增加0.3W，发热是可控的。假设按现有技术，则至少功耗为高性能CPU 2.5W+FPGA1.5W+网卡PHY 1W+以太网物理层芯片(Physical Layer)4×0.5W＝8W，电源损耗80％，整机功耗10W以上。而且随着光模块数量增多，功耗急剧增大。The main heat source of the local cabinet is the optical module, and the power consumption of each 100M optical module is about 1W. In order to reduce power consumption, the single-chip microcomputer + FPGA + optical module structure adopted in the prior art uses FPGA to directly drive the optical module, and the optical module selects the interface device SFP or the miniaturized optical fiber connection device SFF that converts gigabit electrical signals into optical signals, and the power consumption The minimum can be below 0.3W. FPGAs use low-power products, such as the MAX10 series from Altera, the MathXO2 series from Lattice, and the IGLOO2 series from Actel. The single chip microcomputer is used for configuration management and debugging. Calculated by collecting 36 channels of AC analog, controlling 100 channels of input and output IO, and providing 4 pairs of Gigabit interfaces to the outside world, the overall power consumption can be controlled at 0.2W+FPGA 0.5W+optical module 4×0.3W=1.9W, assuming the power supply The loss is 80%, and the overall power consumption can be controlled below 2.5W. As the number of optical modules increases, each channel only increases by 0.3W, and the heat generation is controllable. Assuming that according to the existing technology, at least the power consumption is high-performance CPU 2.5W+FPGA1.5W+network card PHY 1W+Ethernet physical layer chip (Physical Layer) 4×0.5W=8W, power consumption is 80%, and the power consumption of the whole machine is more than 10W . Moreover, as the number of optical modules increases, the power consumption increases sharply.
可见，现有技术结构存在的不足是功耗大，可靠性低，而且需要大量光缆、电缆进入主控室。It can be seen that the disadvantages of the prior art structure are high power consumption, low reliability, and the need for a large number of optical cables and cables to enter the main control room.
如图2所示，数字化互感器采样的超级采集单元，采集交流信息的线路保护的电流电压采集单元CT/PT、母差子机的电流电压采集单元CT/PT、合并单元的电流电压采集单元CT/PT可以采用电子式互感器，经隔离和积分还原电路得到交流数据，以数字量报文的形式发送至FPGA。相对于图1所示的结构，将互感器电缆改为光缆进入户外柜。As shown in Figure 2, the super acquisition unit for digital transformer sampling, the current and voltage acquisition unit CT/PT for line protection that collects AC information, the current and voltage acquisition unit CT/PT for bus differential and sub-units, and the current and voltage acquisition unit for the merging unit CT/PT can use electronic transformers to obtain AC data through isolation and integral restoration circuits, and send them to FPGA in the form of digital messages. Compared with the structure shown in Figure 1, the transformer cable is changed to an optical cable to enter the outdoor cabinet.
本发明的就地化继电保护系统(系统)，采样就地设置的结构方式，将单间隔保护装置就地设置，跨间隔保护装置和测控自动化装置设置在主控室内，跨间隔保护装置包括母差保护装置和主变保护装置。单间隔保护装置与主控室之间通过百兆光纤通信。系统直接采集模拟量、开关量(直采)，跳闸开出直接连接智能终端(直跳)。The in-situ relay protection system (system) of the present invention adopts the structural mode of sampling and setting on the spot, and the single-interval protection device is arranged on-site, and the inter-interval protection device and the measurement and control automation device are arranged in the main control room, and the inter-interval protection device includes Bus differential protection device and main transformer protection device. The communication between the single compartment protection device and the main control room is through 100M optical fiber. The system directly collects analog and switch values (direct mining), and trips out and directly connects to the smart terminal (direct trip).
根据单间隔保护装置功能、发热分为不同的组件，直接与一次设备电缆连接的超级采集单元放在户外柜内，线路保护、母差子机、合并单元、智能终端等通过光纤和主控室相连的装置放在户外柜外面。According to the function and heat generation of the single-interval protection device, it is divided into different components. The super acquisition unit directly connected to the primary equipment cable is placed in the outdoor cabinet, and the line protection, master and sub-units, merging units, and intelligent terminals are connected to the main control room through optical fibers. Connected units are placed outside the outdoor cabinet.
间隔保护装置为线路保护、合并单元、智能终端和母差子机。The interval protection devices are line protection, merging unit, intelligent terminal and main differential sub-machine.
如图3和图4所示，本发明的装置，就地设置有超级采集单元，超级采集单元连接有母差子机、B码光串、线路保护、合并单元、智能终端、线路保护的电流电压采集单元CT/PT(CT/PT 1#)、母差子机的电流电压采集单元CT/PT(CT/PT 2#)、合并单元的电流电压采集单元CT/PT(CT/PT 3#)、开入量采集单元、开出量采集单元和变压器油温、档位的直流量采集单元。As shown in Fig. 3 and Fig. 4, the device of the present invention is provided with a super acquisition unit on the spot, and the super acquisition unit is connected with a mother differential unit, a B code light string, a line protection, a merging unit, an intelligent terminal, and a current of the line protection Voltage acquisition unit CT/PT (CT/PT 1#), current and voltage acquisition unit CT/PT (CT/PT 2#) of the master differential sub-machine, current and voltage acquisition unit CT/PT (CT/PT 3#) of the merging unit ), a binary input volume acquisition unit, a binary output volume acquisition unit, and a DC flow acquisition unit for transformer oil temperature and gear position.
超级采集单元、CT/PT 1#、CT/PT 2#、CT/PT 3#、开入量采集单元、开出量采集单元和直流量采集单元设置在靠近一次设备放置的户外柜内。线路保护、合并单元、智能终端和母差子机在户外柜外壁上就地设置。超级采集单元分别经千兆光纤与线路保护、合并单元、智能终端和母差子机通信连接。线路保护、合并单元、智能终端和母差子机分别经百兆光纤与设置在数字化变电站的主控室通信连接。The super acquisition unit, CT/PT 1#, CT/PT 2#, CT/PT 3#, binary input volume acquisition unit, binary output volume acquisition unit and DC flow acquisition unit are set in the outdoor cabinet placed close to the primary equipment. The line protection, merging unit, intelligent terminal and master and slave units are set on the outer wall of the outdoor cabinet. The super acquisition unit is respectively connected to the line protection, the merging unit, the intelligent terminal and the master and sub-units through gigabit optical fiber. The line protection, merging unit, intelligent terminal and master differential unit are respectively connected to the main control room set up in the digital substation through 100M optical fiber.
超级采集单元接收CT/PT 1#、CT/PT 2#、CT/PT 3#、开入量采集单元、开出量采集单元和直流量采集单元发送来的交流量和开关量，向母差子机、线路保护、合并单元和智能终端输出控制信号，控制断路器动作。超级采集单元经传输校时B码的光纤与设置在主控室的全球定位系统GPS连接，将校时信息经B码光串引入到与超级采集单元连接的各个单元中，进行同步。The super acquisition unit receives the AC and switch values sent by CT/PT 1#, CT/PT 2#, CT/PT 3#, binary input quantity acquisition unit, binary output quantity acquisition unit and DC flow quantity acquisition unit, and sends to the bus differential The slave unit, line protection, merging unit and intelligent terminal output control signals to control the action of the circuit breaker. The super acquisition unit is connected to the global positioning system GPS installed in the main control room through the optical fiber transmitting the B code for time calibration, and the time calibration information is introduced into each unit connected to the super acquisition unit through the B code light string for synchronization.
超级采集单元采用低功耗高可靠性的FPGA，具备4路千兆并行转换器Serders功能，功耗低于2.5W，实现超低功耗和高可靠性。本实施例选择美国爱特Actel公司的SMARTFUSION2系列产品。The super acquisition unit adopts FPGA with low power consumption and high reliability, and has the function of 4-way gigabit parallel converter Serders, and the power consumption is less than 2.5W, realizing ultra-low power consumption and high reliability. This embodiment selects the SMARTFUSION2 series products of American Actel Company.
母差子机经千兆光纤与超级采集单元连接，超级采集单元通过母差子机接收主控室的母差保护装置(母差主机)传来的母差保护的跳合闸开关量数据的面向通用对象的变电站事件GOOSE报文。母差子机对上与主控室的母差保护装置通过百兆光纤接口相连，对下经千兆光纤与超级采集单元相连。The master differential sub-machine is connected to the super acquisition unit through a gigabit optical fiber, and the super acquisition unit receives the tripping and closing switch data of the bus differential protection from the bus differential protection device (bus differential host) in the main control room through the main differential sub-machine Generic object-oriented substation event GOOSE message. The parent differential and sub-units are connected to the parent differential protection device in the main control room through the 100M optical fiber interface, and the downstream is connected to the super acquisition unit via the gigabit optical fiber.
线路保护通过千兆光纤与超级采集单元连接，线路保护经超级采集单元接收从电流电压采集单元CT/PT采集来的交流量信息。线路保护装置用于保护线路的一次设备，线路保护经百兆光纤与主控室通信，采用制造报文规范MMS报文和Goose报文格式，线路保护的E1端经E1光纤与数字化变电站的对侧线路保护相连接。E1为一种电信信道，采用同步时分复用方法将30个语音信道和2个控制信道复合在一条2.048Mbit/s的高速信道上。对侧是指供电线路另一端的数字化变电站。The line protection is connected to the super acquisition unit through a gigabit optical fiber, and the line protection receives the AC volume information collected from the current and voltage acquisition unit CT/PT through the super acquisition unit. The line protection device is used to protect the primary equipment of the line. The line protection communicates with the main control room through the 100M optical fiber, and adopts the manufacturing message specification MMS message and Goose message format. The E1 end of the line protection communicates with the digital substation through the E1 optical fiber. The side line protection is connected. E1 is a kind of telecommunication channel, which uses synchronous time division multiplexing method to combine 30 voice channels and 2 control channels on a 2.048Mbit/s high-speed channel. The opposite side refers to the digital substation at the other end of the power supply line.
合并单元经千兆光纤与超级采集单元连接，接收从合并单元互感器CT/PT3#采集来的交流量采样数据，经百兆光纤按采样数据SV点对点传输至主控室的跨间隔保护装置。The merging unit is connected to the super acquisition unit via a gigabit optical fiber, receives the AC volume sampling data collected from the transformer CT/PT3# of the merging unit, and transmits the sampled data SV point-to-point to the cross-interval protection device in the main control room through a 100-megabit optical fiber.
智能终端经千兆光纤与超级采集单元连接，接收从开入量采集单元、开出量采集单元和直流量采集单元发送来的交流量和开关量信息数据，智能终端经百兆光纤采用Goose报文与主控室通信。The smart terminal is connected to the super acquisition unit via a gigabit optical fiber, and receives the AC and switch information data sent from the binary input acquisition unit, binary output acquisition unit, and DC flow acquisition unit. text to communicate with the main control room.
如图5所示，线路保护设有线路保护FPGA和8口以太网收发器PHY188E3082,线路保护FPGA与主控室测控自动化装置和跨间隔保护装置通信经PHY1分别采用MMS和Goose报文。8口的以太网收发器PHY1中设有至少两个收发MMS报文的光纤接口和至少两个收发Goose报文的光纤接口，均为百兆光纤接口，由PHY1控制百兆光纤接口进行报文传输。线路保护FPGA连接有两路E1、B码光纤接口1、CPU1和CPU2、千兆光模块1。E1用于与对侧线路保护装置通信，B码光纤接口1用于经B码光纤从超级采集单元获取校时信息，CPU1和CPU2用于运行线路保护系统，千兆光模块1用于线路保护FPGA与超级采集单元通信，获取交流、开入、开出信息。As shown in Figure 5, the line protection is equipped with a line protection FPGA and an 8-port Ethernet transceiver PHY188E3082. The line protection FPGA communicates with the measurement and control automation device in the main control room and the cross-interval protection device through PHY1 using MMS and Goose messages respectively. The 8-port Ethernet transceiver PHY1 is equipped with at least two fiber interfaces for sending and receiving MMS messages and at least two fiber interfaces for sending and receiving Goose messages, all of which are 100M fiber interfaces, and PHY1 controls the 100M fiber interface to send messages transmission. The line protection FPGA is connected with two channels of E1, B-code optical fiber interface 1, CPU1 and CPU2, and Gigabit optical module 1. E1 is used to communicate with the line protection device on the opposite side, B-code optical fiber interface 1 is used to obtain timing information from the super acquisition unit via B-code optical fiber, CPU1 and CPU2 are used to run the line protection system, and Gigabit optical module 1 is used for line protection The FPGA communicates with the super acquisition unit to obtain communication, input and output information.
如图6所示，合并单元设有合并单元FPGA和8口以太网收发器PHY288E3082，合并单元FPGA与主控室的跨间隔保护装置通信经百兆光纤按SV点对点传输，传输交流量数据。PHY2设有N个SV百兆光纤接口，N为1～8个，具体数量按现在要求确定。合并单元FPGA经千兆光模块2接收超级采集单元发送来的交流量信息，经CPU3处理后通过百兆光纤接口发送给主控室，B码光纤接口2用于经B码光纤从超级采集单元获取校时信息。As shown in Figure 6, the merging unit is equipped with a merging unit FPGA and an 8-port Ethernet transceiver PHY288E3082. The merging unit FPGA communicates with the cross-interval protection device in the main control room through SV point-to-point transmission through 100M optical fiber to transmit communication traffic data. PHY2 is equipped with N SV 100M optical fiber interfaces, N is 1 to 8, and the specific number is determined according to current requirements. The merging unit FPGA receives the communication volume information sent by the super acquisition unit through the gigabit optical module 2, and sends it to the main control room through the 100M optical fiber interface after being processed by the CPU3. Get school time information.
如图7所示，智能终端设有智能终端FPGA和8口以太网收发器PHY 388E3082，智能终端FPGA与主控室的测控自动化装置通信经PHY3采用Goose报文。PHY3设有M个收发Goose报文的百兆光纤接口，M为1～8个，具体数量按现在要求确定。智能终端FPGA经千兆光模块接收超级采集单元发送来的开入、开出量信息，经CPU4处理后通过百兆光纤发送给主控室，B码光纤接口3用于经B码光纤从超级采集单元获取校时信息。As shown in Figure 7, the intelligent terminal is equipped with an intelligent terminal FPGA and an 8-port Ethernet transceiver PHY 388E3082. The communication between the intelligent terminal FPGA and the measurement and control automation device in the main control room uses Goose messages through PHY3. PHY3 is equipped with M 100M optical fiber interfaces for sending and receiving Goose messages, M is 1 to 8, and the specific number is determined according to current requirements. The intelligent terminal FPGA receives the input and output information sent by the super acquisition unit through the gigabit optical module, and sends it to the main control room through the 100M optical fiber after being processed by the CPU4. The acquisition unit acquires the timing information.
在110kV以下电压等级的变电站中，合并单元与智能终端集成为一个装置，可以减少合并单元与智能终端数量，降低成本。In substations with a voltage level below 110kV, the merging unit and smart terminal are integrated into one device, which can reduce the number of merging units and smart terminals and reduce costs.
如图8所示，合并单元和智能装置(合智装置)设有合智装置FPGA和8口以太网收发器PHY4 88E3082。合智装置FPGA与主控室的跨间隔保护装置通信经百兆光纤按SV点对点传输，合智装置PHY4设有N个SV百兆光纤接口，N为1～8个。合智装置FPGA与主控室测控自动化装置通信经PHY4采用Goose报文，合智装置PHY4设有M个收发Goose报文的百兆光纤接口，M为1～8个。合智装置FPGA的千兆光模块4接收超级采集单元发送来的交流、开入、开出量信息，经CPU5处理后通过百兆光纤接口发送给主控室，B码光纤接口4用于经B码光纤从超级采集单元获取校时信息。As shown in Fig. 8, the merging unit and the smart device (intelligent device) are provided with a combined smart device FPGA and an 8-port Ethernet transceiver PHY4 88E3082. The communication between the FPGA of Hezhi device and the cross-interval protection device in the main control room is transmitted by SV point-to-point through 100M optical fiber. The PHY4 of Hezhi device is equipped with N SV 100M optical fiber interfaces, and N is 1 to 8. The communication between the FPGA of Hezhi device and the measurement and control automation device in the main control room adopts Goose messages via PHY4. The gigabit optical module 4 of the FPGA of the Hezhi device receives the exchange, input, and output information sent by the super acquisition unit, and sends it to the main control room through the 100M optical fiber interface after being processed by the CPU5. The B code optical fiber interface 4 is used for The B-code optical fiber obtains the timing information from the super acquisition unit.
如图9所示，母差子机设有母差子机FPGA和私有协议模块，母差子机FPGA通过私有协议与主控室的母差主机通信。私有协议为母差子机FPGA与不同数字化变电站母差主机的专有通信协议。母差子机FPGA的千兆光模块5接收超级采集单元发送来的采集交流、开入、开出数据，经CPU6处理后通过百兆光纤接口传输至主控室的母差主机，B码光纤接口5用于经B码光纤从超级采集单元获取校时信息。As shown in Figure 9, the main differential sub-unit is equipped with a main differential sub-unit FPGA and a private protocol module, and the main differential sub-unit FPGA communicates with the main control room main control unit through a private protocol. The proprietary protocol is a proprietary communication protocol between the FPGA of the bus differential sub-machine and the bus differential host of different digital substations. The gigabit optical module 5 of FPGA of the bus and slave unit receives the collected communication, input and output data sent by the super acquisition unit. Interface 5 is used to obtain time correction information from the super acquisition unit via the B-code optical fiber.
本发明将数量最大的单间隔保护装置线路保护、合并单元、智能终端、母差子机就地布置，跨间隔保护装置和测控自动化装置设置在主控室内，单间隔保护装置与主控室通过光纤通信，节省了现有技术中的数字化变电站连接进入主控室的大量电缆，节省了现有技术中单间隔保护装置到智能终端的点对点传输的部分光纤。系统直采、直跳，本间隔内的交流量、开入、开出量在本间隔处理，不再经通信转发，安全可靠。就地布置的系统，端接在户外柜内安装，方便布线和接线。根据功能、发热分为不同设置的组件，发热量大的组件安装在户外柜外，通过其本身的外壳直接自然散热，散热好，户外柜发热降低，不再需要空调机，降低了继电保护的成本，与一次设备直连的超级采集单元柜内安装，IP防护好，提高了系统的可靠性，并且方便运维。In the present invention, the line protection, merging unit, intelligent terminal, and bus and sub-units of the largest number of single-interval protection devices are arranged on the spot, and the cross-interval protection devices and measurement and control automation devices are arranged in the main control room, and the single-interval protection devices pass through the main control room. Optical fiber communication saves a large number of cables connected to the main control room in the digital substation in the prior art, and saves part of the optical fiber in the point-to-point transmission from the single-interval protection device to the intelligent terminal in the prior art. The system directly collects and skips, and the communication volume, input and output volume in this interval are processed in this interval, and are no longer forwarded by communication, which is safe and reliable. An in-place system with terminations installed in an outdoor cabinet for easy cabling and wiring. According to the function and heat generation, it is divided into components with different settings. The components with high heat generation are installed outside the outdoor cabinet, and the heat is directly and naturally dissipated through its own shell. The heat dissipation is good, the heat generation of the outdoor cabinet is reduced, and the air conditioner is no longer needed, which reduces the relay protection. The cost is low, and the super acquisition unit directly connected to the primary equipment is installed in the cabinet, and the IP protection is good, which improves the reliability of the system and facilitates operation and maintenance.
| Application Number | Priority Date | Filing Date | Title |
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| CN201611181075.XACN106532957B (en) | 2016-12-20 | 2016-12-20 | Site relay protection system |
| Application Number | Priority Date | Filing Date | Title |
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| CN201611181075.XACN106532957B (en) | 2016-12-20 | 2016-12-20 | Site relay protection system |
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| CN106532957Atrue CN106532957A (en) | 2017-03-22 |
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| CN201611181075.XAActiveCN106532957B (en) | 2016-12-20 | 2016-12-20 | Site relay protection system |
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| TA01 | Transfer of patent application right | Effective date of registration:20180710 Address after:100032 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Applicant after:State Grid Corporation of China Applicant after:CYG Sunri Automation Co., Ltd. Applicant after:State Grid Jiangsu Electric Power Co., Ltd. Electric Power Research Institute Applicant after:Zhejiang Electric Power Co., Ltd. Address before:518057 6, No. 3 Langshan Road, North Nanshan District high tech Industrial Park, Shenzhen, Guangdong Applicant before:CYG Sunri Automation Co., Ltd. | |
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