WO2016090934A1 - Simulation test device for mutual inductor of lte wireless communication intelligent substation - Google Patents

Simulation test device for mutual inductor of lte wireless communication intelligent substation Download PDF

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Publication number
WO2016090934A1
WO2016090934A1 PCT/CN2015/086112 CN2015086112W WO2016090934A1 WO 2016090934 A1 WO2016090934 A1 WO 2016090934A1 CN 2015086112 W CN2015086112 W CN 2015086112W WO 2016090934 A1 WO2016090934 A1 WO 2016090934A1
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WIPO (PCT)
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module
wireless
output end
intelligent substation
transceiver module
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PCT/CN2015/086112
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French (fr)
Chinese (zh)
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罗蓬
郝晓光
赵宇皓
李铁成
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国家电网公司
国网河北省电力公司电力科学研究院
河北省电力建设调整试验所
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Publication of WO2016090934A1 publication Critical patent/WO2016090934A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network

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  • the invention belongs to the technical field of intelligent substation testing, and relates to a LET wireless communication intelligent substation transformer simulation test device.
  • the intelligent substation Based on the DL860 standard (IEC61850 standard), the intelligent substation adopts advanced technologies such as digital sampling, intelligent primary equipment and optical fiber Ethernet. It has the characteristics of digitalization, network and information sharing at the whole station. It also improves the intelligent level of the substation and also gives the substation Testing, commissioning and testing raise higher requirements.
  • Intelligent substation testing is the key to ensure the smooth operation of intelligent substation.
  • the reliability and effectiveness of the secondary equipment and system functions of intelligent substation depend on the guarantee of testing technology.
  • the testing of secondary equipment of intelligent substation should include not only unit detection of equipment such as merging unit, intelligent terminal, digital protection, but also comprehensive system-level testing of communication, interoperation and component systems between devices. Therefore, it is necessary to establish a complete system.
  • the intelligent substation secondary equipment test and test system realizes integrated testing including comprehensive functions such as relay protection and measurement and control.
  • Intelligent substation has the characteristics of communication digitization, network and information sharing at the whole station.
  • Traditional secondary equipment testing tools can only send and receive test data in fixed format, and complete individual testing of specific equipment and single function, which cannot ensure the formation of the system. Reliability and effectiveness of the overall function;
  • the intelligent substation separation layer protection is arranged in the protection room, and the process layer merging unit and the intelligent terminal are dispersedly arranged in situ;
  • the process layer merging unit and the intelligent terminal are dispersedly arranged in situ;
  • test main station can be seamlessly connected to the intelligent station secondary system, and the advanced intelligent station complex fault, development fault, equipment defect, personnel misoperation and other advanced test applications can be constructed.
  • the performance of the substation secondary system is fully and in-depth evaluated.
  • the technical problem to be solved by the present invention is to provide a LET wireless communication intelligent substation testing device that realizes coordinated testing of multiple intervals and multiple types of devices and can perform comprehensive performance testing on secondary devices before installation.
  • a LET wireless communication intelligent substation transformer simulation test device including an emulation main station, a first LET wireless transceiver module, a second LET wireless transceiver module, a distributed data terminal and a power An amplifying circuit;
  • the emulation master station is bidirectionally connected to a corresponding port of the first LET radio transceiver module;
  • the first LET radio transceiver module is wirelessly connected to the second LET radio transceiver module;
  • the second LET radio transceiver module is connected a corresponding port of the distributed data terminal;
  • an output end of the distributed data terminal is connected to a corresponding input end of the power amplifying circuit; and an output end of the power amplifying circuit is connected to an interval combining unit of the smart substation.
  • the distributed data terminal includes an FPGA module, first to second Ethernet transceiver modules, a wireless one-way broadcast module, a wireless two-way broadcast module, a GPS timing module, a GPS antenna, a DA conversion circuit, a driver module, and an Ethernet fiber interface module. And the first to the second 4-way optical fiber interface; the FPGA module includes an SV receiving module, an SV processing module, a GOOSE transceiver module, a GOOSE forwarding module, a clock module, a clock recovery module, and a DA processing module;
  • the input end of the wireless unidirectional broadcast module is connected to the sampled value signal output end of the second LTE wireless transceiver module; the output end of the wireless unidirectional broadcast module is connected to the SV through the first Ethernet transceiver module Input of the module; the SV The output end of the receiving module is connected to the corresponding input end of the SV processing module;
  • the input ends of the DA processing module and the driving module are respectively connected to corresponding output ends of the SV processing module;
  • An input end of the DA conversion circuit is connected to an output end of the DA processing module;
  • the output end of the DA conversion circuit is connected to a corresponding input end of the power amplifying circuit
  • the output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation;
  • the switch signal port of the second LTE wireless transceiver module is bidirectionally connected to the corresponding port of the wireless bidirectional broadcast module;
  • the wireless bidirectional broadcast module passes through the second Ethernet transceiver module and the corresponding port of the GOOSE transceiver module a two-way connection;
  • the GOOSE transceiver module is bidirectionally connected to a corresponding port of the driver module via the GOOSE forwarding module;
  • the first 4-way optical fiber interface is connected to a corresponding output end of the driving module
  • the second 4-way optical fiber interface is bidirectionally connected to a corresponding port of the driving module
  • the GPS antenna is bidirectionally connected to the clock module via the GPS timing module;
  • the clock module is connected to a corresponding input end of the SV processing module
  • the clock module, the SV processing module, and the Ethernet fiber interface module are bidirectionally connected to respective ports of the clock recovery module.
  • the DA conversion circuit is composed of a DAC 8562 chip and its peripheral circuits.
  • the power amplifying circuit is composed of a chip of the model LM1875 and its peripheral circuits.
  • the model of the FPGA module is Cyclone IV EP4CE2217I7N; the models of the first to second Ethernet transceiver modules are all DB83640; the wireless one-way broadcast module and the wireless two-way broadcast module are both Sima wireless bridges;
  • the model of the GPS timing module is TIME-M3339; the model of the driver module is BCM5248; the model of the Ethernet fiber interface module is HFBR-2412TZ; the models of the first to second 4-way fiber interfaces are OCM3825- 54.
  • All hardware devices of the invention adopt portable and modular design, are easy to carry and assemble, and can be widely used in substation sites. Installation and commissioning test and outage maintenance test, technical performance evaluation.
  • the invention is based on the distributed layout consideration of the intelligent substation, and the near-end experimental equipment is respectively arranged beside the field devices of different intervals, connected in situ, connected with the remote device through the LTE wireless local area private network, and no debugging personnel are needed.
  • the fiber is additionally carried, and the system is convenient to construct and has strong environmental adaptability.
  • the invention can accurately simulate the operating state of most power systems, investigate the working conditions of secondary equipment such as protection, measurement and control, and conduct more comprehensive closed-loop testing of the field devices.
  • the present invention simultaneously accesses a plurality of interval-related protection and measurement and control devices, and tests the action logic of the protection device by simulating the electromagnetic transient state of various faults, and examines the action performance of the protection device. Investigating the interoperability between the secondary devices and the performance of the communication network, the complete test of the secondary system of the whole station was realized, and the on-site workflow was optimized.
  • Figure 1 is a schematic block diagram of the present invention.
  • FIG. 2 is a schematic block diagram of a distributed data terminal of the present invention.
  • the simulation main station, the first LET wireless transceiver module, the second LET wireless transceiver module, the distributed data terminal, and the power amplification circuit are included; the simulation main station and the first The corresponding port of the LET wireless transceiver module is bidirectionally connected; the first LET wireless transceiver module is wirelessly connected to the second LET wireless transceiver module; the second LET wireless transceiver module is connected to the corresponding port of the distributed data terminal; The output end of the data terminal is connected to the corresponding input end of the power amplifying circuit; the output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation.
  • the distributed data terminal includes an FPGA module, first to second Ethernet transceiver modules, a wireless one-way broadcast module, a wireless two-way broadcast module, a GPS timing module, a GPS antenna, a DA conversion circuit, a driver module, and an Ethernet fiber interface module. And the first to the second 4-way optical fiber interface; the FPGA module includes an SV receiving module, an SV processing module, GOOSE transceiver module, GOOSE forwarding module, clock module, clock recovery module and DA processing module;
  • the input end of the wireless unidirectional broadcast module is connected to the sampled value signal output end of the second LTE wireless transceiver module; the output end of the wireless unidirectional broadcast module is connected to the SV through the first Ethernet transceiver module An input end of the module; an output end of the SV receiving module is connected to a corresponding input end of the SV processing module;
  • the input ends of the DA processing module and the driving module are respectively connected to corresponding output ends of the SV processing module;
  • An input end of the DA conversion circuit is connected to an output end of the DA processing module;
  • the output end of the DA conversion circuit is connected to a corresponding input end of the power amplifying circuit
  • the output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation;
  • the switch signal port of the second LTE wireless transceiver module is bidirectionally connected to the corresponding port of the wireless bidirectional broadcast module;
  • the wireless bidirectional broadcast module passes through the second Ethernet transceiver module and the corresponding port of the GOOSE transceiver module a two-way connection;
  • the GOOSE transceiver module is bidirectionally connected to a corresponding port of the driver module via the GOOSE forwarding module;
  • the first 4-way optical fiber interface is connected to a corresponding output end of the driving module
  • the second 4-way optical fiber interface is bidirectionally connected to a corresponding port of the driving module
  • the GPS antenna is bidirectionally connected to the clock module via the GPS timing module;
  • the clock module is connected to a corresponding input end of the SV processing module
  • the clock module, the SV processing module, and the Ethernet fiber interface module are bidirectionally connected to respective ports of the clock recovery module.
  • the DA conversion circuit is composed of a DAC 8562 chip and its peripheral circuits.
  • the power amplifying circuit is composed of a chip of the model LM1875 and its peripheral circuits.
  • the model of the FPGA module is Cyclone IV EP4CE2217I7N; the models of the first to second Ethernet transceiver modules are all DB83640; the wireless one-way broadcast module and the wireless two-way broadcast module are both Sima wireless bridges;
  • the model of the GPS timing module is TIME-M3339; the model of the driving module is BCM5248; the Ethernet light
  • the model of the fiber interface module is HFBR-2412TZ; the models of the first to second 4-way fiber interfaces are all OCM3825-54.
  • the SV receiving module receives the current and voltage sampling signals transmitted from the wireless channel (calculated by the simulation master station).
  • the SV processing module obtains the SV message that can be identified by the secondary device such as the back-end substation protection device by using the current and voltage sampling signals obtained by the SV receiving module, and the specific message is in the IEC61850-9-2 format.
  • the DA processing module completes the digital to analog conversion process of the sampled value data.
  • the GOOSE transceiver and forwarding module receives and forwards the GOOSE message transmitted from the wireless channel to the secondary device such as the substation protection device, and transmits the GOOSE message to the wireless module from the substation and transmits it to the simulation main station.
  • the clock module implements full system clock synchronization.
  • the clock recovery module is used for clock recovery when the system clock is out of sync.
  • the data terminal implements the functions of the current and voltage transformers.
  • the 8-channel analog interface of the data terminal directly outputs current and voltage analog small signals.
  • the secondary current and voltage analog quantities are sent to the real interval merging unit, and then protected by point-to-point or networking. , secondary equipment such as measurement and control.
  • This mode can examine the operation and communication performance of secondary equipment including the merging unit.
  • the data terminal replaces the function of the measured interval merging unit.
  • the main station transmits the current and voltage data obtained by the electromagnetic transient calculation to the data terminal through the high-speed synchronous wireless channel, and the data terminal directly outputs the SV digitized sampling message through the 4-channel optical Ethernet port, and provides the interval layer through the point-to-point or networking mode.
  • Secondary equipment such as protection, measurement and control, and its working performance.
  • the actual intelligent terminal and the switch tool gate are not connected to the entire test loop, but the test data terminal replaces the corresponding GOOSE message receiving and forwarding function.
  • the protection device collects the fault quantity
  • the action instruction is fed back to the main station system through the terminal 4 optical Ethernet interface and the wireless channel in the form of GOOSE message, and the main station system changes the switch state in the fault model accordingly, and adjusts the output.
  • the current and voltage quantities enable closed-loop testing of equipment functions such as protection devices.
  • the invention is based on intelligent substation test standards and indicators, and proposes LTE-based application for infrastructure construction and maintenance test sites.
  • Intelligent substation integrated test system solution for wireless communication mainly includes high-performance intelligent substation real-time simulator, electromagnetic transient simulation software for whole station level test, real-time I/O interface device, LTE wireless data transmission channel, distributed data terminal and so on.
  • the test system can not only perform unit detection on each component of the intelligent station secondary system, but also perform system-level testing between the devices and the component system, providing a complete set of synergy for the comprehensive functions of the digital substation including digital protection, measurement and control.
  • the test environment is of great significance for the research, design, testing, testing and evaluation of intelligent substations.
  • the integrated test platform and the real intelligent substation secondary equipment form a closed-loop analog test system.
  • the platform provides the current and voltage required for operation of the secondary system of the tested intelligent substation, and can simulate the current and voltage during the normal operation of the substation.
  • the value can also simulate the fault current and voltage during substation failure and misoperation, so as to examine the action behavior of a single set of protection and the synergy ability of multiple sets of protection.
  • the platform is equipped with a general model parameter library suitable for different main wiring forms of intelligent stations, which can simulate various types of equipment failures such as lines, transformers, bus bars, and various electromagnetic transient processes of complex and developmental faults.
  • a general model parameter library suitable for different main wiring forms of intelligent stations, which can simulate various types of equipment failures such as lines, transformers, bus bars, and various electromagnetic transient processes of complex and developmental faults.
  • the intelligent station real-time simulator is the core of the operation and control of the secondary equipment integration test system of the whole intelligent substation. It is based on the industrial control host hardware structure design and is equipped with intelligent station simulation test software, which can realize the functions of the conventional protection tester and build faults. Model components enable simulation of typical line, main transformer, and bus faults.
  • the emulator host adopts real-time operating system, and the man-machine interface runs in it, which can provide high-precision current and voltage values required for normal operation protection, measurement and control devices, and also provide fault current and voltage during grid faults and misoperations. value.
  • the simulator has detailed electromagnetic transient models and various fault models for transformers, circuits, circuit breakers, etc., and builds more complex composite and development faults on this basis, which can be used for digital protection, measurement and control, etc. Equipment performance Comprehensive and detailed dynamic test.
  • the real-time I/O interface implements the interface function of real-time information interaction between the simulation computing core and the peripheral analog device. Based on the calculation results of the substation real-time simulator, the high-precision voltage and current signal sources are provided for the relay protection and measurement and control devices by digital or analog means, and the state feedback of the circuit breaker, the isolating switch and the grounding device can be collected in real time to the simulator.
  • FPGA-based PCI-E interface design using the PCI Express-specific integrated module built into the FPGA, can save the dedicated PCI-E interface chip, reduce the hardware design cost, and improve the hardware integration. Utilizing the programmable features of the FPGA, design flexibility, adaptability, and scalability are greatly enhanced.
  • LTE wireless data transmission channel According to the typical design requirements of the State Grid Corporation intelligent station, the intelligent station interval layer protection of 220kV and above is arranged in the protection room, while the process layer merging unit and the intelligent terminal are arranged next to the local primary equipment, based on this distributed layout.
  • the test data transmission between the process layer and the spacer layer in the present invention is wireless.
  • the wireless communication device is connected to the emulation host through the PCI-E bus of the real-time I/O interface, and the voltage and current quantities are respectively sent to the specified interval, and the GOOSE message fed back from each interval is parsed and uploaded to the emulator.
  • the test data transmission in the present invention adopts the TD-LTE wireless local area private network mode.
  • This method follows the 3GPP R10 LTE series standard protocol.
  • the working frequency band can be switched to 1.4/1.8 GHz.
  • the data rate is determined to be 80 Mbps downstream, 30 Mbps upstream, and 16 maximum UE numbers.
  • the transceiver adopts 2 antennas (2 receives 1 round), the peak transmitting power is 2W, and the effective coverage radius is 3km, which can fully meet the scale of typical intelligent substation applications.
  • the eNodeB device function and the EPC core network function in the LTE standard are integrated into the embedded operating system of the master station device, which greatly increases the integration degree of the system and reduces The cost is convenient for the use and maintenance of the system.
  • the distributed data terminal connects the simulation test platform with the real intelligent substation secondary system to achieve a closed loop of the entire test process.
  • each data terminal can be placed next to each intelligent control cabinet at the interval to be tested, and connected to a secondary device such as a substation merging unit or an intelligent terminal through a cable or an optical cable.
  • the data terminal should have both analog and digital Two sampled value output modes are used to simulate the output data of the front end and back end of the merged unit.
  • the data terminal also has the function of GOOSE state quantity information communication, and is connected to the protection, measurement and control equipment through a point-to-point or GOOSE network, and becomes an interface for the interaction between the interval layer and the process layer information.
  • the terminal in order to ensure a high degree of time consistency between the test system and the secondary device, the terminal should also have the function of precise timing and deterministic synchronization.
  • the data terminal supports two wireless modules at the same time, and connects to the emulation host through the wireless channel, one receives the sampled value information, and the other is used for transmitting and receiving the switch quantity and position information.
  • the data terminal hardware supports 8 optical 100M Ethernet interfaces, 4 of which are used to transmit 4 channels of the same IEC61850-9-2 or FT3 format SV messages, and the other 4 are used to transmit 4 channels of the same GOOSE message.
  • the SV communication adopts a full data set message, and the data terminal supports an 8-bit unique identification number, and the sampled value required for the interval is extracted from the SV message by the identification number, and the communication is performed according to the following communication protocol: [terminal 1 identification number] [Channel 1 sample value]...[Channel 8 sample value]...[Terminal n identification number] [Channel 1 sample value]...[Channel 8 sample value].
  • the data terminal supports 8-way DA open, compatible with two main bus lines and three main wiring forms.
  • the line interval data terminal provides 1u+3i analog output
  • the bus line interval data terminal provides 3u+3u analog output
  • the line interval data terminal outputs 4u+4i simulation The amount, the bus interval data terminal outputs an analog quantity of 4u + 4u.
  • data terminals and emulation hosts support multiple synchronization methods, including:
  • Both the host and the terminal are equipped with an independent space-based GPS timing system, and the time-sharing antenna is connected through the reserved GPS interface to achieve time alignment;
  • the host and the terminal each reserve one ST optical port, which are connected to the substation optical B code counter screen cabinet, and keep synchronized with the station timing system;
  • the host sends an independent wireless timing signal to the terminal to realize the timing between the master and the slave.
  • the above three timing methods can be individually selected according to the actual space environment and signal conditions, and can also work simultaneously and backup each other to ensure that the entire simulation test system works under the same clock.
  • Different wireless terminals must be synchronized within a precision of 10 ⁇ s .
  • the data terminal can access the secondary system in various ways to realize the function simulation of different devices and the key tests of different scopes and functions of the secondary system.
  • the data terminal replaces the function of the measured interval combining unit.
  • the main station transmits the current and voltage data obtained by the electromagnetic transient calculation to the data terminal through the high-speed synchronous wireless channel, and the data terminal directly outputs the SV digitized sampling message through the 4-channel optical Ethernet port, and provides the interval layer through the point-to-point or networking mode.
  • Secondary equipment such as protection, measurement and control, and its working performance.
  • the data terminal implements the functions of the current and voltage transformers.
  • the 8-channel analog interface of the data terminal directly outputs current and voltage analog small signals.
  • the secondary current and voltage analog quantities are sent to the real interval combining unit, and then provided to the protection through point-to-point or networking. Secondary equipment such as measurement and control.
  • This mode can examine the operation and communication performance of secondary equipment including the merging unit.
  • the GOOSE state quantity information transmission also has the following two modes.
  • the actual intelligent terminal and the switching tool gate device are not connected to the entire test loop, but the test data terminal is replaced by the corresponding GOOSE message receiving and forwarding function.
  • the protection device collects the fault quantity
  • the action instruction is fed back to the main station system through the terminal 4 optical Ethernet interface and the wireless channel in the form of GOOSE message, and the main station system changes the switch state in the fault model accordingly, and adjusts the output.
  • the current and voltage quantities enable closed-loop testing of equipment functions such as protection devices.
  • This mode realizes the entire test of the secondary device with the switch to be tested in the interval.
  • the difference with the way 1 is that the protective device After the fault is collected, the actual protection-intelligent terminal-switching device loop is implemented to jump and close.
  • the test data terminal collects the corresponding message from the GOOSE network, and then parses it back to the primary station system through the wireless channel. Change the state of the switch in the fault model and adjust the current and voltage of the output accordingly. Realize the entire set of dynamic model tests including smart terminals and switch primary devices.

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  • General Physics & Mathematics (AREA)
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Abstract

A simulation test device for a mutual inductor of an LTE wireless communication intelligent substation comprises a simulation master station, a first LTE wireless transceiver module, a second LTE wireless transceiver module, a distributed data terminal and a power amplification circuit, and has the advantageous effects of being convenient to carry and assemble and widely applicable to field installation and debugging tests, outage maintenance tests and technical performance evaluation for substations. Near-end experimental equipment is respectively arranged by the side of field equipment disposed at different intervals and is connected with far-end equipment in an LTE private wireless local area network mode, and there is no need for debugging staff to carry optical fibers; the running state of most of the electric power systems can be accurately simulated, and the working condition of secondary equipment for protection, measurement and control and the like is inspected; and meanwhile, a plurality of interval correlation protection, measurement and control devices are connected, so that a complete test for the secondary system of the whole substation is achieved and field workflow is optimized.

Description

一种LET无线通信智能变电站互感器模拟测试装置LET wireless communication intelligent substation transformer simulation test device 技术领域Technical field
本发明属于智能变电站测试技术领域，涉及一种LET无线通信智能变电站互感器模拟测试装置。The invention belongs to the technical field of intelligent substation testing, and relates to a LET wireless communication intelligent substation transformer simulation test device.
背景技术Background technique
智能变电站基于DL860标准(IEC61850标准)，采用数字化采样、智能一次设备和光纤以太网等先进技术，具有数字化、网络化和全站信息共享的特点，在提高变电站智能化水平的同时也给变电站的检测、调试和试验提出了更高的要求。Based on the DL860 standard (IEC61850 standard), the intelligent substation adopts advanced technologies such as digital sampling, intelligent primary equipment and optical fiber Ethernet. It has the characteristics of digitalization, network and information sharing at the whole station. It also improves the intelligent level of the substation and also gives the substation Testing, commissioning and testing raise higher requirements.
智能变电站测试是确保智能变电站顺利投运的关键环节，智能变电站二次设备及系统功能的可靠性、有效性都依赖于测试技术的保证。智能变电站二次设备的测试不仅应包括合并单元、智能终端、数字化保护等设备的单元检测，还需要对设备之间的通信、互操作以及组成系统进行全面的系统级测试，因此需要建立完备的智能变电站二次设备试验、测试系统，实现包括继电保护、测控等全面功能的集成测试。Intelligent substation testing is the key to ensure the smooth operation of intelligent substation. The reliability and effectiveness of the secondary equipment and system functions of intelligent substation depend on the guarantee of testing technology. The testing of secondary equipment of intelligent substation should include not only unit detection of equipment such as merging unit, intelligent terminal, digital protection, but also comprehensive system-level testing of communication, interoperation and component systems between devices. Therefore, it is necessary to establish a complete system. The intelligent substation secondary equipment test and test system realizes integrated testing including comprehensive functions such as relay protection and measurement and control.
目前，受测试模型、数据传输通道、终端及接口等方面技术水平的影响，现有的针对智能变电站二次设备的测试工具无法良好应用于变电站现场测试环境，实现多个间隔、多种类型设备的协同测试。主要问题包括以下几个方面：At present, due to the technical level of test models, data transmission channels, terminals and interfaces, the existing test tools for secondary sub-equipment of intelligent substation cannot be well applied to the substation field test environment to realize multiple intervals and multiple types of equipment. Collaborative testing. The main issues include the following:
1)智能变电站具有通信数字化、网络化和全站信息共享的特点，传统的二次设备测试工具通常只能收发固定格式的测试数据，完成特定设备、单一功能的单独测试，无法确保构成系统后整体功能的可靠性和有效性；1) Intelligent substation has the characteristics of communication digitization, network and information sharing at the whole station. Traditional secondary equipment testing tools can only send and receive test data in fixed format, and complete individual testing of specific equipment and single function, which cannot ensure the formation of the system. Reliability and effectiveness of the overall function;
2)在运行的智能变电站二次系统配置模式多样，二次设备生产厂家繁杂，设备组网方式、采用的通信规约存在较大的差异，目前尚没有一种测试工具可以通用于不同类型智能变电站的测试任务；2) The secondary system configuration modes of the intelligent substation in operation are diverse, the secondary equipment manufacturers are complicated, the equipment networking mode and the adopted communication protocol are quite different. Currently, there is no test tool that can be applied to different types of intelligent substations. Test task
3)目前智能变电站间隔层保护布置在保护室内，而过程层合并单元及智能终端就地分散布置； 鉴于此分布式布局，受空间距离以及环境影响，变电站现场的间隔整组通流通压及功能传动等难以实现，给变电站的安全稳定运行带来了一定的隐患；3) At present, the intelligent substation separation layer protection is arranged in the protection room, and the process layer merging unit and the intelligent terminal are dispersedly arranged in situ; In view of this distributed layout, due to the spatial distance and the influence of the environment, it is difficult to realize the interval of the substation site, and the circulation and function transmission are difficult to realize, which brings certain hidden dangers to the safe and stable operation of the substation;
4)无法在安装前对二次设备进行全面的性能检测，只能将这部分工作安排在现场调试环节进行，使调试工作异常繁重。4) It is impossible to perform comprehensive performance testing on the secondary equipment before installation. Only this part of the work can be arranged in the on-site debugging, which makes the debugging work extremely heavy.
综上所述，随着我国智能站建设的蓬勃开展，需要一种新型的适用于智能变电站现场的二次设备测试手段。通过更加灵活的数据传输及终端接入模式，实现测试主站无缝接入智能站二次系统，构建典型智能站复杂故障、发展性故障以及设备缺陷、人员误操作等高级测试应用，对智能变电站二次系统的性能进行全面深入的评估。In summary, with the vigorous development of intelligent station construction in China, a new type of secondary equipment testing method suitable for intelligent substation site is needed. Through more flexible data transmission and terminal access mode, the test main station can be seamlessly connected to the intelligent station secondary system, and the advanced intelligent station complex fault, development fault, equipment defect, personnel misoperation and other advanced test applications can be constructed. The performance of the substation secondary system is fully and in-depth evaluated.
发明内容Summary of the invention
本发明所要解决的技术问题是提供一种实现多个间隔、多种类型设备的协同测试且可在安装前对二次设备进行全面性能检测的LET无线通信智能变电站测试装置。The technical problem to be solved by the present invention is to provide a LET wireless communication intelligent substation testing device that realizes coordinated testing of multiple intervals and multiple types of devices and can perform comprehensive performance testing on secondary devices before installation.
为解决上述技术问题所采用的技术方案是：一种LET无线通信智能变电站互感器模拟测试装置，包括仿真主站、第一LET无线收发模块、第二LET无线收发模块、分布式数据终端和功率放大电路；所述仿真主站与所述第一LET无线收发模块的相应端口双向连接；所述第一LET无线收发模块与第二LET无线收发模块无线连接；所述第二LET无线收发模块接所述分布式数据终端的相应端口；所述分布式数据终端的输出端接所述功率放大电路的相应输入端；所述功率放大电路的输出端接智能变电站的间隔合并单元。The technical solution adopted to solve the above technical problem is: a LET wireless communication intelligent substation transformer simulation test device, including an emulation main station, a first LET wireless transceiver module, a second LET wireless transceiver module, a distributed data terminal and a power An amplifying circuit; the emulation master station is bidirectionally connected to a corresponding port of the first LET radio transceiver module; the first LET radio transceiver module is wirelessly connected to the second LET radio transceiver module; and the second LET radio transceiver module is connected a corresponding port of the distributed data terminal; an output end of the distributed data terminal is connected to a corresponding input end of the power amplifying circuit; and an output end of the power amplifying circuit is connected to an interval combining unit of the smart substation.
所述分布式数据终端包括FPGA模块、第一至第二以太网收发模块、无线单向广播模块、无线双向广播模块、GPS定时模块、GPS天线、DA转换电路、驱动模块、以太网光纤接口模块和第一至第二4路光纤接口；所述FPGA模块包括SV接收模块、SV处理模块、GOOSE收发模块、GOOSE转发模块、时钟模块、时钟恢复模块和DA处理模块；The distributed data terminal includes an FPGA module, first to second Ethernet transceiver modules, a wireless one-way broadcast module, a wireless two-way broadcast module, a GPS timing module, a GPS antenna, a DA conversion circuit, a driver module, and an Ethernet fiber interface module. And the first to the second 4-way optical fiber interface; the FPGA module includes an SV receiving module, an SV processing module, a GOOSE transceiver module, a GOOSE forwarding module, a clock module, a clock recovery module, and a DA processing module;
所述无线单向广播模块的输入端接所述第二LET无线收发模块的采样值信号输出端；所述无线单向广播模块的输出端经所述第一以太网收发模块接所述SV接收模块的输入端；所述SV 接收模块的输出端接所述SV处理模块的相应输入端；The input end of the wireless unidirectional broadcast module is connected to the sampled value signal output end of the second LTE wireless transceiver module; the output end of the wireless unidirectional broadcast module is connected to the SV through the first Ethernet transceiver module Input of the module; the SV The output end of the receiving module is connected to the corresponding input end of the SV processing module;
所述DA处理模块和驱动模块的输入端分别接所述SV处理模块的相应输出端；The input ends of the DA processing module and the driving module are respectively connected to corresponding output ends of the SV processing module;
所述DA转换电路的输入端接所述DA处理模块的输出端；An input end of the DA conversion circuit is connected to an output end of the DA processing module;
所述DA转换电路的输出端接功率放大电路的相应输入端；The output end of the DA conversion circuit is connected to a corresponding input end of the power amplifying circuit;
所述功率放大电路的输出端接智能变电站的间隔合并单元；The output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation;
所述第二LET无线收发模块的开关量信号端口与所述无线双向广播模块的相应端口双向连接；所述无线双向广播模块经所述第二以太网收发模块与所述GOOSE收发模块的相应端口双向连接；所述GOOSE收发模块经所述GOOSE转发模块与所述驱动模块的相应端口双向连接；The switch signal port of the second LTE wireless transceiver module is bidirectionally connected to the corresponding port of the wireless bidirectional broadcast module; the wireless bidirectional broadcast module passes through the second Ethernet transceiver module and the corresponding port of the GOOSE transceiver module a two-way connection; the GOOSE transceiver module is bidirectionally connected to a corresponding port of the driver module via the GOOSE forwarding module;
所述第一4路光纤接口接所述驱动模块的相应输出端；The first 4-way optical fiber interface is connected to a corresponding output end of the driving module;
所述第二4路光纤接口与所述驱动模块的相应端口双向连接；The second 4-way optical fiber interface is bidirectionally connected to a corresponding port of the driving module;
所述GPS天线经所述GPS定时模块与所述时钟模块双向连接；The GPS antenna is bidirectionally connected to the clock module via the GPS timing module;
所述时钟模块接所述SV处理模块的相应输入端；The clock module is connected to a corresponding input end of the SV processing module;
所述时钟模块、SV处理模块和以太网光纤接口模块分别与所述时钟恢复模块的相应端口双向连接。The clock module, the SV processing module, and the Ethernet fiber interface module are bidirectionally connected to respective ports of the clock recovery module.
所述DA转换电路是由DAC8562芯片及其外围电路构成。The DA conversion circuit is composed of a DAC 8562 chip and its peripheral circuits.
所述功率放大电路是由型号为LM1875的芯片及其外围电路构成。The power amplifying circuit is composed of a chip of the model LM1875 and its peripheral circuits.
所述FPGA模块的型号为Cyclone IV EP4CE2217I7N；所述第一至第二以太网收发模块的型号均为DB83640；所述无线单向广播模块和无线双向广播模块均为信马无线网桥；所述GPS定时模块的型号为TIME-M3339；所述驱动模块的型号为BCM5248；所述以太网光纤接口模块的型号为HFBR-2412TZ；所述第一至第二4路光纤接口的型号均为OCM3825-54。The model of the FPGA module is Cyclone IV EP4CE2217I7N; the models of the first to second Ethernet transceiver modules are all DB83640; the wireless one-way broadcast module and the wireless two-way broadcast module are both Sima wireless bridges; The model of the GPS timing module is TIME-M3339; the model of the driver module is BCM5248; the model of the Ethernet fiber interface module is HFBR-2412TZ; the models of the first to second 4-way fiber interfaces are OCM3825- 54.
本发明的有益效果是：The beneficial effects of the invention are:
1)本发明所有硬件设备采用便携式、模块化设计，便于携带组装，可广泛应用于变电站现场 的安装调试试验和停运检修测试、技术性能评价。1) All hardware devices of the invention adopt portable and modular design, are easy to carry and assemble, and can be widely used in substation sites. Installation and commissioning test and outage maintenance test, technical performance evaluation.
2)本发明基于智能变电站的分布式布局考虑，将近端的实验设备分别布置在不同间隔的现场设备旁，就地连接，通过LTE无线局域专网方式与远端设备相联，不需要调试人员额外携带光纤，系统构建方便、环境适应性强。2) The invention is based on the distributed layout consideration of the intelligent substation, and the near-end experimental equipment is respectively arranged beside the field devices of different intervals, connected in situ, connected with the remote device through the LTE wireless local area private network, and no debugging personnel are needed. The fiber is additionally carried, and the system is convenient to construct and has strong environmental adaptability.
3)本发明可以准确模拟大部分电力系统的运行状态，考察保护、测控等二次设备的工作情况，对现场装置进行更加全面的闭环测试。3) The invention can accurately simulate the operating state of most power systems, investigate the working conditions of secondary equipment such as protection, measurement and control, and conduct more comprehensive closed-loop testing of the field devices.
4)较以往的单装置检测调试手段，本发明同时接入多个间隔相关保护、测控装置，通过模拟各种故障的电磁暂态状态，检验保护装置的动作逻辑，考察保护装置的动作性能、考察二次装置间的互操作性能和通信网络的性能，实现了对整站二次系统的完整测试，优化了现场工作流程。4) Compared with the previous single-device detection and debugging means, the present invention simultaneously accesses a plurality of interval-related protection and measurement and control devices, and tests the action logic of the protection device by simulating the electromagnetic transient state of various faults, and examines the action performance of the protection device. Investigating the interoperability between the secondary devices and the performance of the communication network, the complete test of the secondary system of the whole station was realized, and the on-site workflow was optimized.
附图说明DRAWINGS
图1为本发明的原理框图。Figure 1 is a schematic block diagram of the present invention.
图2为本发明分布式数据终端原理框图。2 is a schematic block diagram of a distributed data terminal of the present invention.
具体实施方式detailed description
由图1-2所示的实施例可知，包括仿真主站、第一LET无线收发模块、第二LET无线收发模块、分布式数据终端和功率放大电路；所述仿真主站与所述第一LET无线收发模块的相应端口双向连接；所述第一LET无线收发模块与第二LET无线收发模块无线连接；所述第二LET无线收发模块接所述分布式数据终端的相应端口；所述分布式数据终端的输出端接所述功率放大电路的相应输入端；所述功率放大电路的输出端接智能变电站的间隔合并单元。As shown in the embodiment shown in FIG. 1-2, the simulation main station, the first LET wireless transceiver module, the second LET wireless transceiver module, the distributed data terminal, and the power amplification circuit are included; the simulation main station and the first The corresponding port of the LET wireless transceiver module is bidirectionally connected; the first LET wireless transceiver module is wirelessly connected to the second LET wireless transceiver module; the second LET wireless transceiver module is connected to the corresponding port of the distributed data terminal; The output end of the data terminal is connected to the corresponding input end of the power amplifying circuit; the output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation.
所述分布式数据终端包括FPGA模块、第一至第二以太网收发模块、无线单向广播模块、无线双向广播模块、GPS定时模块、GPS天线、DA转换电路、驱动模块、以太网光纤接口模块和第一至第二4路光纤接口；所述FPGA模块包括SV接收模块、SV处理模块、 GOOSE收发模块、GOOSE转发模块、时钟模块、时钟恢复模块和DA处理模块；The distributed data terminal includes an FPGA module, first to second Ethernet transceiver modules, a wireless one-way broadcast module, a wireless two-way broadcast module, a GPS timing module, a GPS antenna, a DA conversion circuit, a driver module, and an Ethernet fiber interface module. And the first to the second 4-way optical fiber interface; the FPGA module includes an SV receiving module, an SV processing module, GOOSE transceiver module, GOOSE forwarding module, clock module, clock recovery module and DA processing module;
所述无线单向广播模块的输入端接所述第二LET无线收发模块的采样值信号输出端；所述无线单向广播模块的输出端经所述第一以太网收发模块接所述SV接收模块的输入端；所述SV接收模块的输出端接所述SV处理模块的相应输入端；The input end of the wireless unidirectional broadcast module is connected to the sampled value signal output end of the second LTE wireless transceiver module; the output end of the wireless unidirectional broadcast module is connected to the SV through the first Ethernet transceiver module An input end of the module; an output end of the SV receiving module is connected to a corresponding input end of the SV processing module;
所述DA处理模块和驱动模块的输入端分别接所述SV处理模块的相应输出端；The input ends of the DA processing module and the driving module are respectively connected to corresponding output ends of the SV processing module;
所述DA转换电路的输入端接所述DA处理模块的输出端；An input end of the DA conversion circuit is connected to an output end of the DA processing module;
所述DA转换电路的输出端接功率放大电路的相应输入端；The output end of the DA conversion circuit is connected to a corresponding input end of the power amplifying circuit;
所述功率放大电路的输出端接智能变电站的间隔合并单元；The output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation;
所述第二LET无线收发模块的开关量信号端口与所述无线双向广播模块的相应端口双向连接；所述无线双向广播模块经所述第二以太网收发模块与所述GOOSE收发模块的相应端口双向连接；所述GOOSE收发模块经所述GOOSE转发模块与所述驱动模块的相应端口双向连接；The switch signal port of the second LTE wireless transceiver module is bidirectionally connected to the corresponding port of the wireless bidirectional broadcast module; the wireless bidirectional broadcast module passes through the second Ethernet transceiver module and the corresponding port of the GOOSE transceiver module a two-way connection; the GOOSE transceiver module is bidirectionally connected to a corresponding port of the driver module via the GOOSE forwarding module;
所述第一4路光纤接口接所述驱动模块的相应输出端；The first 4-way optical fiber interface is connected to a corresponding output end of the driving module;
所述第二4路光纤接口与所述驱动模块的相应端口双向连接；The second 4-way optical fiber interface is bidirectionally connected to a corresponding port of the driving module;
所述GPS天线经所述GPS定时模块与所述时钟模块双向连接；The GPS antenna is bidirectionally connected to the clock module via the GPS timing module;
所述时钟模块接所述SV处理模块的相应输入端；The clock module is connected to a corresponding input end of the SV processing module;
所述时钟模块、SV处理模块和以太网光纤接口模块分别与所述时钟恢复模块的相应端口双向连接。The clock module, the SV processing module, and the Ethernet fiber interface module are bidirectionally connected to respective ports of the clock recovery module.
所述DA转换电路是由DAC8562芯片及其外围电路构成。The DA conversion circuit is composed of a DAC 8562 chip and its peripheral circuits.
所述功率放大电路是由型号为LM1875的芯片及其外围电路构成。The power amplifying circuit is composed of a chip of the model LM1875 and its peripheral circuits.
所述FPGA模块的型号为Cyclone IV EP4CE2217I7N；所述第一至第二以太网收发模块的型号均为DB83640；所述无线单向广播模块和无线双向广播模块均为信马无线网桥；所述GPS定时模块的型号为TIME-M3339；所述驱动模块的型号为BCM5248；所述以太网光 纤接口模块的型号为HFBR-2412TZ；所述第一至第二4路光纤接口的型号均为OCM3825-54。The model of the FPGA module is Cyclone IV EP4CE2217I7N; the models of the first to second Ethernet transceiver modules are all DB83640; the wireless one-way broadcast module and the wireless two-way broadcast module are both Sima wireless bridges; The model of the GPS timing module is TIME-M3339; the model of the driving module is BCM5248; the Ethernet light The model of the fiber interface module is HFBR-2412TZ; the models of the first to second 4-way fiber interfaces are all OCM3825-54.
SV接收模块接收从无线信道传来的电流、电压采样信号(仿真主站计算得到)。The SV receiving module receives the current and voltage sampling signals transmitted from the wireless channel (calculated by the simulation master station).
SV处理模块将SV接收模块取得的电流电压采样信号，通过编码、规约转换得到后端变电站保护装置等二次设备能够识别的SV报文，具体报文为IEC61850-9-2格式。The SV processing module obtains the SV message that can be identified by the secondary device such as the back-end substation protection device by using the current and voltage sampling signals obtained by the SV receiving module, and the specific message is in the IEC61850-9-2 format.
DA处理模块完成采样值数据的数字量到模拟量的转换过程。The DA processing module completes the digital to analog conversion process of the sampled value data.
GOOSE收发、转发模块将从无线信道传来的GOOSE报文接收、转发到变电站保护装置等二次设备，同时将变电站发来GOOSE报文传输到无线模块，并回传到仿真主站。The GOOSE transceiver and forwarding module receives and forwards the GOOSE message transmitted from the wireless channel to the secondary device such as the substation protection device, and transmits the GOOSE message to the wireless module from the substation and transmits it to the simulation main station.
时钟模块实现全系统时钟同步功能。The clock module implements full system clock synchronization.
时钟恢复模块在系统时钟不同步时用于时钟恢复。The clock recovery module is used for clock recovery when the system clock is out of sync.
在该模式下，数据终端实现了电流、电压互感器的功能。数据终端的8通道模拟量接口直接输出电流、电压模拟小信号，经过功率放大电路放大后，将二次电流、电压模拟量发送给真实的间隔合并单元，再通过点对点或组网方式提供给保护、测控等二次设备。这种模式可以考察包括合并单元在内的二次设备运行及通信性能。In this mode, the data terminal implements the functions of the current and voltage transformers. The 8-channel analog interface of the data terminal directly outputs current and voltage analog small signals. After amplification by the power amplifier circuit, the secondary current and voltage analog quantities are sent to the real interval merging unit, and then protected by point-to-point or networking. , secondary equipment such as measurement and control. This mode can examine the operation and communication performance of secondary equipment including the merging unit.
智能变电站合并单元模拟接入模式下，数据终端替代了被测间隔合并单元的功能。主站将电磁暂态计算取得的电流、电压数据通过高速同步无线信道发送给数据终端，数据终端通过4路光以太网口直接输出SV数字化采样报文，通过点对点或组网方式提供给间隔层保护、测控等二次设备，考察其工作性能。In the intelligent substation merging unit analog access mode, the data terminal replaces the function of the measured interval merging unit. The main station transmits the current and voltage data obtained by the electromagnetic transient calculation to the data terminal through the high-speed synchronous wireless channel, and the data terminal directly outputs the SV digitized sampling message through the 4-channel optical Ethernet port, and provides the interval layer through the point-to-point or networking mode. Secondary equipment such as protection, measurement and control, and its working performance.
智能变电站智能终端模拟接入模式下，被测间隔实际智能终端、开关刀闸一次设备未接入整个测试闭环，而是由测试数据终端替代实现了相应的GOOSE报文接收、转发功能。当保护装置采集到故障量后，将动作指令以GOOSE报文形式通过终端4路光以太网接口、无线信道反馈给主站系统，主站系统相应改变故障模型中的开关状态，并调整输出的电流、电压量，实现保护装置等设备功能的闭环测试。In the intelligent substation intelligent terminal analog access mode, the actual intelligent terminal and the switch tool gate are not connected to the entire test loop, but the test data terminal replaces the corresponding GOOSE message receiving and forwarding function. After the protection device collects the fault quantity, the action instruction is fed back to the main station system through the terminal 4 optical Ethernet interface and the wireless channel in the form of GOOSE message, and the main station system changes the switch state in the fault model accordingly, and adjusts the output. The current and voltage quantities enable closed-loop testing of equipment functions such as protection devices.
本发明依据智能变电站测试标准和指标，提出适用于基建及检修测试现场的基于LTE 无线通信的智能变电站集成测试系统方案。该集成测试系统主要包括高性能智能变电站实时仿真器、面向整站级测试的电磁暂态仿真软件、实时I/O接口装置、LTE无线数据传输通道、分布式数据终端等。The invention is based on intelligent substation test standards and indicators, and proposes LTE-based application for infrastructure construction and maintenance test sites. Intelligent substation integrated test system solution for wireless communication. The integrated test system mainly includes high-performance intelligent substation real-time simulator, electromagnetic transient simulation software for whole station level test, real-time I/O interface device, LTE wireless data transmission channel, distributed data terminal and so on.
该测试系统不仅可以对智能站二次系统的各个组成设备进行单元检测，还可以对设备之间以及组成系统进行系统级测试，为智能变电站内包括数字化保护、测控等全面功能提供了整组协同测试环境，对于智能变电站的研究、设计、试验、检测和评估等具有重要意义。The test system can not only perform unit detection on each component of the intelligent station secondary system, but also perform system-level testing between the devices and the component system, providing a complete set of synergy for the comprehensive functions of the digital substation including digital protection, measurement and control. The test environment is of great significance for the research, design, testing, testing and evaluation of intelligent substations.
对应于智能变电站站控层、间隔层和过程层的三层体系架构。该集成测试平台与真实的智能变电站二次设备共同构成闭环的模拟测试系统，平台为被测智能变电站二次系统提供运行所需的电流、电压，既可以模拟变电站正常运行过程中的电流、电压值，也可以模拟变电站故障及误操作时的故障电流、电压，从而考察单套保护的动作行为以及多套保护的协同配合能力。Corresponding to the three-layer architecture of the intelligent substation station control layer, bay level and process layer. The integrated test platform and the real intelligent substation secondary equipment form a closed-loop analog test system. The platform provides the current and voltage required for operation of the secondary system of the tested intelligent substation, and can simulate the current and voltage during the normal operation of the substation. The value can also simulate the fault current and voltage during substation failure and misoperation, so as to examine the action behavior of a single set of protection and the synergy ability of multiple sets of protection.
该平台配置有适用于智能站不同主接线形式的通用模型参数库，能够模拟线路、变压器、母线等各种类型的设备故障以及各种复合性、发展性故障的电磁暂态过程。通过实时仿真器与分布式数据终端之间的LTE高速同步无线数据通道，为整个测试系统提供高精度、高实时性数据传输保障，灵活有效的实现站内合并单元、智能终端、保护装置等单装置及整组测试。The platform is equipped with a general model parameter library suitable for different main wiring forms of intelligent stations, which can simulate various types of equipment failures such as lines, transformers, bus bars, and various electromagnetic transient processes of complex and developmental faults. Through the LTE high-speed synchronous wireless data channel between the real-time simulator and the distributed data terminal, it provides high-precision and high-real-time data transmission guarantee for the entire test system, and flexibly and efficiently realizes a single device such as a station merging unit, an intelligent terminal, and a protection device. And the entire set of tests.
智能站实时仿真器是整个智能变电站二次设备集成测试系统的运算和控制核心，基于工业控制主机硬件结构设计，搭载智能站仿真测试软件，既可以实现常规保护测试仪功能，又可以通过构建故障模型组件实现对典型线路、主变、母线故障的模拟。The intelligent station real-time simulator is the core of the operation and control of the secondary equipment integration test system of the whole intelligent substation. It is based on the industrial control host hardware structure design and is equipped with intelligent station simulation test software, which can realize the functions of the conventional protection tester and build faults. Model components enable simulation of typical line, main transformer, and bus faults.
仿真器主机采用实时操作系统，人机界面运行于其中，既能提供正常运行时保护、测控等装置所需的高精度电流、电压值，也能够提供电网故障及误操作时的故障电流、电压值。仿真器拥有变压器、线路、断路器等设备详细的电磁暂态模型和各种故障模型，并在此基础上构建出更为复杂的复合性、发展性故障，能够对数字化保护、测控等二次设备的性能进行 全面细致的动模测试。The emulator host adopts real-time operating system, and the man-machine interface runs in it, which can provide high-precision current and voltage values required for normal operation protection, measurement and control devices, and also provide fault current and voltage during grid faults and misoperations. value. The simulator has detailed electromagnetic transient models and various fault models for transformers, circuits, circuit breakers, etc., and builds more complex composite and development faults on this basis, which can be used for digital protection, measurement and control, etc. Equipment performance Comprehensive and detailed dynamic test.
实时I/O接口实现了仿真计算核心和外围模拟装置进行实时信息交互的接口功能。基于变电站实时仿真器的计算结果，通过数字或模拟方式为继电保护、测控装置提供高精度的电压、电流信号源，并能够实时采集断路器、隔离开关、接地设备的状态反馈给仿真器。The real-time I/O interface implements the interface function of real-time information interaction between the simulation computing core and the peripheral analog device. Based on the calculation results of the substation real-time simulator, the high-precision voltage and current signal sources are provided for the relay protection and measurement and control devices by digital or analog means, and the state feedback of the circuit breaker, the isolating switch and the grounding device can be collected in real time to the simulator.
基于FPGA的PCI-E接口设计，利用内置于FPGA的PCI Express专用的集成模块，可以省去专用的PCI-E接口芯片，降低了硬件设计成本，提高了硬件的集成度。利用FPGA的可编程特性，大大提高了设计灵活性、适应性和可扩展性。FPGA-based PCI-E interface design, using the PCI Express-specific integrated module built into the FPGA, can save the dedicated PCI-E interface chip, reduce the hardware design cost, and improve the hardware integration. Utilizing the programmable features of the FPGA, design flexibility, adaptability, and scalability are greatly enhanced.
LTE无线数据传输通道：按照国家电网公司智能站典型设计要求，220kV及以上智能站间隔层保护布置在保护室内，而过程层合并单元及智能终端布置在就地一次设备旁，基于此分布式布局，本发明中过程层和间隔层之间的试验数据传输采用无线方式。无线通信设备通过实时I/O接口的PCI-E总线与仿真主机相连，将电压电流量分别发送到指定的间隔，并将各间隔反馈来的GOOSE报文解析后上传给仿真器。LTE wireless data transmission channel: According to the typical design requirements of the State Grid Corporation intelligent station, the intelligent station interval layer protection of 220kV and above is arranged in the protection room, while the process layer merging unit and the intelligent terminal are arranged next to the local primary equipment, based on this distributed layout. The test data transmission between the process layer and the spacer layer in the present invention is wireless. The wireless communication device is connected to the emulation host through the PCI-E bus of the real-time I/O interface, and the voltage and current quantities are respectively sent to the specified interval, and the GOOSE message fed back from each interval is parsed and uploaded to the emulator.
综合考虑数据规模、传输时延抖动等因素，本发明中试验数据传输采用TD-LTE无线局域专网方式。该方式遵循3GPP R10 LTE系列标准协议，考虑到变电站实际应用环境中的临频干扰、设备部署和扩展等因素，选择工作频段为1.4/1.8GHz可切换。根据典型智能站间隔规模，确定数据速率下行80Mbps、上行30Mbps，最大UE数16个。Considering factors such as data size and transmission delay jitter, the test data transmission in the present invention adopts the TD-LTE wireless local area private network mode. This method follows the 3GPP R10 LTE series standard protocol. Considering the factors such as frequency interference, equipment deployment and expansion in the actual application environment of the substation, the working frequency band can be switched to 1.4/1.8 GHz. According to the typical intelligent station interval size, the data rate is determined to be 80 Mbps downstream, 30 Mbps upstream, and 16 maximum UE numbers.
该收发机采用2天线(2收1发)，峰值发射功率2W，有效覆盖半径3km，完全能够满足典型智能变电站应用规模。此外，为了使本仿真测试系统更加便携化，方便现场应用，将LTE标准中的eNodeB设备功能、EPC核心网功能整合进主站设备的嵌入式操作系统中，大大增加了系统的集成度，降低了成本，方便了系统的使用和维护。The transceiver adopts 2 antennas (2 receives 1 round), the peak transmitting power is 2W, and the effective coverage radius is 3km, which can fully meet the scale of typical intelligent substation applications. In addition, in order to make the simulation test system more portable and convenient for field application, the eNodeB device function and the EPC core network function in the LTE standard are integrated into the embedded operating system of the master station device, which greatly increases the integration degree of the system and reduces The cost is convenient for the use and maintenance of the system.
分布式数据终端将仿真测试平台与真实的智能变电站二次系统连接在一起，实现整个测试过程的闭环。实际应用中，可将各数据终端放置于各待测间隔智能汇控柜旁，通过电缆或光缆与变电站合并单元、智能终端等二次设备相连。该数据终端应同时具有模拟量和数字 量两种采样值输出模式，实现对合并单元前端和后端输出数据的模拟。此外，数据终端还具有GOOSE状态量信息通信的功能，通过点对点或GOOSE网与保护、测控等设备相连，成为间隔层和过程层信息交互的接口。此外，为确保测试系统和二次设备的高度时间一致性，终端还应具有精确对时和确定性同步的功能。The distributed data terminal connects the simulation test platform with the real intelligent substation secondary system to achieve a closed loop of the entire test process. In practical applications, each data terminal can be placed next to each intelligent control cabinet at the interval to be tested, and connected to a secondary device such as a substation merging unit or an intelligent terminal through a cable or an optical cable. The data terminal should have both analog and digital Two sampled value output modes are used to simulate the output data of the front end and back end of the merged unit. In addition, the data terminal also has the function of GOOSE state quantity information communication, and is connected to the protection, measurement and control equipment through a point-to-point or GOOSE network, and becomes an interface for the interaction between the interval layer and the process layer information. In addition, in order to ensure a high degree of time consistency between the test system and the secondary device, the terminal should also have the function of precise timing and deterministic synchronization.
数据终端同时支持两个无线模块，通过无线信道与仿真主机连接，一个接收采样值信息，另一个专门用于收发开关量及位置信息。The data terminal supports two wireless modules at the same time, and connects to the emulation host through the wireless channel, one receives the sampled value information, and the other is used for transmitting and receiving the switch quantity and position information.
数据终端硬件支持8个光百兆以太网接口，其中4个用于传送4路一样的IEC61850-9-2或FT3格式SV报文，另外4个用于传送4路内容一样的GOOSE报文。SV通信采用全数据集报文，数据终端支持8位唯一标识号，并通过该标识号从SV报文中提取本间隔所需采样值，并按如下通信协议进行通信：【终端1标识号】【通道1采样值】…【通道8采样值】…【终端n标识号】【通道1采样值】…【通道8采样值】。The data terminal hardware supports 8 optical 100M Ethernet interfaces, 4 of which are used to transmit 4 channels of the same IEC61850-9-2 or FT3 format SV messages, and the other 4 are used to transmit 4 channels of the same GOOSE message. The SV communication adopts a full data set message, and the data terminal supports an 8-bit unique identification number, and the sampled value required for the interval is extracted from the SV message by the identification number, and the communication is performed according to the following communication protocol: [terminal 1 identification number] [Channel 1 sample value]...[Channel 8 sample value]...[Terminal n identification number] [Channel 1 sample value]...[Channel 8 sample value].
数据终端支持8路DA开出，兼容双母线和3/2接线两种主接线形式。在双母线形式下，线路间隔数据终端提供1u+3i的模拟量输出，母线间隔数据终端提供3u+3u的模拟量输出；在3/2接线方式下，线路间隔数据终端输出4u+4i的模拟量，母线间隔数据终端输出4u+4u的模拟量。The data terminal supports 8-way DA open, compatible with two main bus lines and three main wiring forms. In the double bus form, the line interval data terminal provides 1u+3i analog output, the bus line interval data terminal provides 3u+3u analog output; in the 3/2 wiring mode, the line interval data terminal outputs 4u+4i simulation The amount, the bus interval data terminal outputs an analog quantity of 4u + 4u.
此外，数据终端和仿真主机支持多种同步方式，包括：In addition, data terminals and emulation hosts support multiple synchronization methods, including:
①主机和终端均配备独立的天基GPS对时系统，通过预留的GPS接口连接对时天线，实现对时；1 Both the host and the terminal are equipped with an independent space-based GPS timing system, and the time-sharing antenna is connected through the reserved GPS interface to achieve time alignment;
②主机和终端各预留一个ST光口，均连接到变电站光B码对时屏柜，和站内对时系统保持同步；2 The host and the terminal each reserve one ST optical port, which are connected to the substation optical B code counter screen cabinet, and keep synchronized with the station timing system;
③采用无线数传radio主从对时，主机向终端发送独立的无线对时信号，实现主从之间的对时。3 When the wireless data transmission radio master-slave pair is used, the host sends an independent wireless timing signal to the terminal to realize the timing between the master and the slave.
上述三种对时方式可根据实际空间环境、信号条件等单独选择，也可以同时工作、互 为后备，确保整个仿真测试系统工作在同一个时钟下。不同的无线终端必须同步在10μs的精度范围内。The above three timing methods can be individually selected according to the actual space environment and signal conditions, and can also work simultaneously and backup each other to ensure that the entire simulation test system works under the same clock. Different wireless terminals must be synchronized within a precision of 10 μs .
在实际的工程测试过程中，该数据终端可以通过多种方式接入二次系统，实现不同设备的功能模拟以及二次系统不同范围、不同功能的重点测试。In the actual engineering test process, the data terminal can access the secondary system in various ways to realize the function simulation of different devices and the key tests of different scopes and functions of the secondary system.
①合并单元模拟1 merge unit simulation
在这种模式下，数据终端替代了被测间隔合并单元的功能。主站将电磁暂态计算取得的电流、电压数据通过高速同步无线信道发送给数据终端，数据终端通过4路光以太网口直接输出SV数字化采样报文，通过点对点或组网方式提供给间隔层保护、测控等二次设备，考察其工作性能。In this mode, the data terminal replaces the function of the measured interval combining unit. The main station transmits the current and voltage data obtained by the electromagnetic transient calculation to the data terminal through the high-speed synchronous wireless channel, and the data terminal directly outputs the SV digitized sampling message through the 4-channel optical Ethernet port, and provides the interval layer through the point-to-point or networking mode. Secondary equipment such as protection, measurement and control, and its working performance.
②互感器模拟2 transformer simulation
在该模式下，数据终端实现了电流、电压互感器的功能。数据终端的8通道模拟量接口直接输出电流、电压模拟小信号，经过功率放大器放大后，将二次电流、电压模拟量发送给真实的间隔合并单元，再通过点对点或组网方式提供给保护、测控等二次设备。这种模式可以考察包括合并单元在内的二次设备运行及通信性能。In this mode, the data terminal implements the functions of the current and voltage transformers. The 8-channel analog interface of the data terminal directly outputs current and voltage analog small signals. After being amplified by the power amplifier, the secondary current and voltage analog quantities are sent to the real interval combining unit, and then provided to the protection through point-to-point or networking. Secondary equipment such as measurement and control. This mode can examine the operation and communication performance of secondary equipment including the merging unit.
GOOSE状态量信息传输同样具有以下两种模式。The GOOSE state quantity information transmission also has the following two modes.
③智能终端模拟3 intelligent terminal simulation
在该模式下，被测间隔实际智能终端、开关刀闸一次设备未接入整个测试闭环，而是由测试数据终端替代实现了相应的GOOSE报文接收、转发功能。当保护装置采集到故障量后，将动作指令以GOOSE报文形式通过终端4路光以太网接口、无线信道反馈给主站系统，主站系统相应改变故障模型中的开关状态，并调整输出的电流、电压量，实现保护装置等设备功能的闭环测试。In this mode, the actual intelligent terminal and the switching tool gate device are not connected to the entire test loop, but the test data terminal is replaced by the corresponding GOOSE message receiving and forwarding function. After the protection device collects the fault quantity, the action instruction is fed back to the main station system through the terminal 4 optical Ethernet interface and the wireless channel in the form of GOOSE message, and the main station system changes the switch state in the fault model accordingly, and adjusts the output. The current and voltage quantities enable closed-loop testing of equipment functions such as protection devices.
④带开关整组传动4 with switch full set of transmission
该模式实现待测间隔二次系统带开关一次设备的整组测试。和方式1不同之处在于，保护装 置采集到故障量后，按照实际的保护-智能终端-开关设备回路实现跳、合闸，测试数据终端从GOOSE网采集相应的报文，解析后通过无线信道回传给主站系统，主站改变故障模型中的开关状态，并相应调整输出的电流、电压量。实现包括智能终端和开关一次设备在内的整组动模测试。This mode realizes the entire test of the secondary device with the switch to be tested in the interval. The difference with the way 1 is that the protective device After the fault is collected, the actual protection-intelligent terminal-switching device loop is implemented to jump and close. The test data terminal collects the corresponding message from the GOOSE network, and then parses it back to the primary station system through the wireless channel. Change the state of the switch in the fault model and adjust the current and voltage of the output accordingly. Realize the entire set of dynamic model tests including smart terminals and switch primary devices.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。 The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims (5)

  1. 一种LET无线通信智能变电站互感器模拟测试装置，其特征在于：包括仿真主站、第一LET无线收发模块、第二LET无线收发模块、分布式数据终端和功率放大电路；所述仿真主站与所述第一LET无线收发模块的相应端口双向连接；所述第一LET无线收发模块与第二LET无线收发模块无线连接；所述第二LET无线收发模块接所述分布式数据终端的相应端口；所述分布式数据终端的输出端接所述功率放大电路的相应输入端；所述功率放大电路的输出端接智能变电站的间隔合并单元。A LTE wireless communication intelligent substation transformer simulation test device, comprising: an emulation main station, a first LET wireless transceiver module, a second LET wireless transceiver module, a distributed data terminal and a power amplification circuit; the simulation main station Two-way connection with a corresponding port of the first LET wireless transceiver module; the first LET wireless transceiver module is wirelessly connected to the second LET wireless transceiver module; and the second LET wireless transceiver module is connected to the corresponding of the distributed data terminal a port; an output end of the distributed data terminal is connected to a corresponding input end of the power amplifying circuit; and an output end of the power amplifying circuit is connected to an interval combining unit of the smart substation.
  2. 根据权利要求1所述的一种LET无线通信智能变电站互感器模拟测试装置，其特征在于：所述分布式数据终端包括FPGA模块、第一至第二以太网收发模块、无线单向广播模块、无线双向广播模块、GPS定时模块、GPS天线、DA转换电路、驱动模块、以太网光纤接口模块和第一至第二4路光纤接口；所述FPGA模块包括SV接收模块、SV处理模块、GOOSE收发模块、GOOSE转发模块、时钟模块、时钟恢复模块和DA处理模块；The LTE wireless communication intelligent substation transformer simulation test device according to claim 1, wherein the distributed data terminal comprises an FPGA module, first to second Ethernet transceiver modules, and a wireless one-way broadcast module. Wireless two-way broadcast module, GPS timing module, GPS antenna, DA conversion circuit, drive module, Ethernet fiber interface module and first to second 4-way optical interfaces; the FPGA module includes SV receiving module, SV processing module, GOOSE transceiver Module, GOOSE forwarding module, clock module, clock recovery module and DA processing module;
    所述无线单向广播模块的输入端接所述第二LET无线收发模块的采样值信号输出端；所述无线单向广播模块的输出端经所述第一以太网收发模块接所述SV接收模块的输入端；所述SV接收模块的输出端接所述SV处理模块的相应输入端；The input end of the wireless unidirectional broadcast module is connected to the sampled value signal output end of the second LTE wireless transceiver module; the output end of the wireless unidirectional broadcast module is connected to the SV through the first Ethernet transceiver module An input end of the module; an output end of the SV receiving module is connected to a corresponding input end of the SV processing module;
    所述DA处理模块和驱动模块的输入端分别接所述SV处理模块的相应输出端；The input ends of the DA processing module and the driving module are respectively connected to corresponding output ends of the SV processing module;
    所述DA转换电路的输入端接所述DA处理模块的输出端；An input end of the DA conversion circuit is connected to an output end of the DA processing module;
    所述DA转换电路的输出端接功率放大电路的相应输入端；The output end of the DA conversion circuit is connected to a corresponding input end of the power amplifying circuit;
    所述功率放大电路的输出端接智能变电站的间隔合并单元；The output end of the power amplifying circuit is connected to the interval combining unit of the intelligent substation;
    所述第二LET无线收发模块的开关量信号端口与所述无线双向广播模块的相应端口双向连接；所述无线双向广播模块经所述第二以太网收发模块与所述GOOSE收发模块的相应端口双向连接；所述GOOSE收发模块经所述GOOSE转发模块与所述驱动模块的相应端口双向连接；The switch signal port of the second LTE wireless transceiver module is bidirectionally connected to the corresponding port of the wireless bidirectional broadcast module; the wireless bidirectional broadcast module passes through the second Ethernet transceiver module and the corresponding port of the GOOSE transceiver module a two-way connection; the GOOSE transceiver module is bidirectionally connected to a corresponding port of the driver module via the GOOSE forwarding module;
    所述第一4路光纤接口接所述驱动模块的相应输出端； The first 4-way optical fiber interface is connected to a corresponding output end of the driving module;
    所述第二4路光纤接口与所述驱动模块的相应端口双向连接；The second 4-way optical fiber interface is bidirectionally connected to a corresponding port of the driving module;
    所述GPS天线经所述GPS定时模块与所述时钟模块双向连接；The GPS antenna is bidirectionally connected to the clock module via the GPS timing module;
    所述时钟模块接所述SV处理模块的相应输入端；The clock module is connected to a corresponding input end of the SV processing module;
    所述时钟模块、SV处理模块和以太网光纤接口模块分别与所述时钟恢复模块的相应端口双向连接。The clock module, the SV processing module, and the Ethernet fiber interface module are bidirectionally connected to respective ports of the clock recovery module.
  3. 根据权利要求2所述的一种LET无线通信智能变电站互感器模拟测试装置，其特征在于：所述DA转换电路是由DAC8562芯片及其外围电路构成。The LET wireless communication intelligent substation transformer analog test device according to claim 2, wherein the DA conversion circuit is composed of a DAC8562 chip and peripheral circuits thereof.
  4. 根据权利要求3所述的一种LET无线通信智能变电站互感器模拟测试装置，其特征在于：所述功率放大电路是由型号为LM1875的芯片及其外围电路构成。The LET wireless communication intelligent substation transformer simulation test device according to claim 3, wherein the power amplifying circuit is composed of a chip of the type LM1875 and a peripheral circuit thereof.
  5. 根据权利要求4所述的一种LET无线通信智能变电站互感器模拟测试装置，其特征在于：所述FPGA模块的型号为Cyclone IV EP4CE221717N；所述第一至第二以太网收发模块的型号均为DB83640；所述无线单向广播模块和无线双向广播模块均为信马无线网桥；所述GPS定时模块的型号为TIME-M3339；所述驱动模块的型号为BCM5248；所述以太网光纤接口模块的型号为HFBR-2412TZ；所述第一至第二4路光纤接口的型号均为OCM3825-54。 The LTE wireless communication intelligent substation transformer simulation test device according to claim 4, wherein the model of the FPGA module is Cyclone IV EP4CE221717N; and the models of the first to second Ethernet transceiver modules are all DB83640; the wireless one-way broadcast module and the wireless two-way broadcast module are both a Sima wireless bridge; the model of the GPS timing module is TIME-M3339; the model of the drive module is BCM5248; the Ethernet optical interface module The model number is HFBR-2412TZ; the first to second 4-way fiber optic interfaces are all OCM3825-54.
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