CN105376119A - Intelligent transformer substation system grade time characteristic testing device - Google Patents

Abstract

The invention discloses a system-level time characteristic testing device of an intelligent substation, which includes a data transmission system and a data analysis system. The forwarding module is connected to the data analysis system, and the output terminal of the synchronous signal output module is connected to the input terminal of the standard signal acquisition module and the input terminal of the data processing and forwarding module. The invention can realize the time characteristic test of the tested merging unit, the protection measurement and control device and the intelligent switchgear of the intelligent substation, greatly improves the debugging speed of the intelligent substation, and provides a good technical guarantee for the rapid development and construction of the intelligent substation. The safe and stable operation has laid a solid foundation.

Description

System-level time characteristic test device for smart substation

technical field

The invention relates to the technical field of detection and calibration equipment for intelligent substations and digital substations in electric power systems, in particular to a system-level time characteristic testing device for intelligent substations.

Background technique

Smart substation is an indispensable part of smart grid construction. Compared with traditional substations, the sampling and control signals between electrical equipment in smart substations are increasingly transformed from traditional cable analog transmission to optical fiber digital transmission, which also brings about the instability of data information transmission. , where the instability of time performance is particularly obvious. The conformance test of the EC61850 (DL/T860) standard provides relevant regulations and explanations for the system performance test. The conformance test document puts forward two requirements for the performance test, which are time accuracy and communication delay test. Time accuracy domestically mainly uses synchronization accuracy and time punctuality accuracy as test indicators, and communication delay mainly uses dispersion and absolute delay as test indicators.

At present, the development of smart substations and digital substations has entered the stage of large-scale engineering applications. In order to ensure the safe and stable operation of smart substations, it is not only necessary to test the performance and functions of various equipment before putting them into operation, but also to increase the system of substations. Level testing to achieve comprehensive evaluation and detection of the overall performance and functions of smart substations. Judging from the current situation, the existing relevant testing instruments and tools on the market can only test different intelligent electronic devices such as merging units, intelligent terminals, protection measurement and control, etc., breaking away from the integrity and systematic testing requirements of intelligent substations. The test efficiency is reduced, and the test method generates test signals by the test equipment itself, which cannot fully reflect its real operation; the test process relies on the standard clock source and its accuracy, and requires the test equipment to have the ability to access and output timing signals. This reduces test compatibility and increases the complexity and difficulty of on-site test loops.

Contents of the invention

The purpose of the present invention is to provide a system-level time characteristic test device of an intelligent substation, which can simultaneously test the time characteristics of the tested merging unit, protection measurement and control device, and intelligent switchgear of the intelligent substation, so as to satisfy the system-level requirements of the power system users for the intelligent substation. Time characteristic test requirements.

In order to achieve the above object, the technical scheme adopted in the present invention is:

The system-level time characteristic test device of an intelligent substation includes a data transmission system and a data analysis system. The data transmission system includes a standard signal acquisition module, a data processing and forwarding module, and a synchronous signal output module. The standard signal acquisition module and the data processing and forwarding module are connected In the data analysis system, the output end of the synchronous signal output module is connected to the input end of the standard signal acquisition module and the input end of the data processing forwarding module; the standard signal acquisition module is used to obtain the analog signal of the primary power of the smart substation, and based on the The clock beat samples the analog signal, and submits the obtained standard sampling data to the data analysis system; the data processing and forwarding module is used to receive the FT3 sampling value data sent by the tested merging unit of the smart substation, and mark the arrival time information and perform format conversion. Submit the FT3 sampling value data with time stamp to the data analysis system through Ethernet; the data processing and forwarding module is also used to receive the SV message sent by the tested merging unit of the smart substation and mark the arrival time information, and transfer the tested merging unit with time stamp The SV message is submitted to the data analysis system; the data processing and forwarding module is also used to receive the Goose message sent by the intelligent substation protection measurement and control device and the Goose message sent by the intelligent switchgear, and mark the arrival time information respectively, and send the protection measurement and control device with time stamp Goose message and smart switch device Goose message are submitted to the data analysis system; the data processing and forwarding module is also used to collect the switch signal of the smart switch device in real time and submit it to the data analysis system; the synchronization signal output module is used to output the second pulse synchronization signal The data analysis system is used to extract and compare the fundamental wave phase of the standard sampling data output by the standard signal acquisition module and the FT3 sampling value data output by the data processing and forwarding module, so as to realize the time characteristic test of the tested merging unit of the smart substation; the data analysis system also It is used to compare the time stamp information of the tested merging unit SV message output by the data processing and forwarding module and the Goose message of the protection measurement and control device to realize the time characteristic test of the protection measurement and control device; the data analysis system is also used to compare the output of the data processing and forwarding module. The time stamp information of the Goose message of the smart switch device and the displacement information of the switch signal realize the time characteristic test of the smart switch device.

The data processing and forwarding module includes a data receiving unit and a data forwarding unit, the data receiving unit is connected to the data forwarding unit through a shared dual-port memory, and the data receiving unit is used to receive the SV message sent by the tested merging unit of the intelligent substation, conforming to IEC60044-8 standard or national grid standard FT3 sampling value data, Goose message sent by protection measurement and control device and Goose message sent by intelligent switchgear, and respectively record the SV message of the merged unit under test, FT3 sampling value data, protection measurement and control The device Goose message and the arrival time information of the intelligent switch equipment Goose message, the data receiving unit is also used to collect the switch signal of the intelligent switch equipment in real time; The Goose message and the Goose message of the intelligent switch equipment mark the arrival time information, form the SV message of the merged unit under test, the Goose message of the protection measurement and control device, and the Goose message of the intelligent switch equipment with time stamps, and then send them to the data analysis system and the data forwarding unit It is also used to mark the arrival time information of the FT3 sampled value data, and convert the FT3 sampled value data with time stamp into the IEC61850-9-1 protocol form and transmit it to the data analysis system through Ethernet. The data forwarding unit is also used to transfer the intelligent switch The switching signal of the equipment is sent to the data analysis system.

The standard signal acquisition module includes a standard voltage acquisition unit, a standard current acquisition unit and a multi-channel synchronous acquisition board, the standard voltage acquisition unit includes a standard voltage transformer and a voltage signal converter, and the output terminal of the standard voltage transformer is connected to a voltage signal conversion The standard current acquisition unit includes a standard current transformer and a current signal converter, the output terminal of the standard current transformer is connected to the input terminal of the current signal converter, the output terminal of the voltage signal converter and the output of the current signal converter The terminals are respectively connected to the input terminals of the multi-channel synchronous acquisition board, the multi-channel synchronous acquisition board is connected to the data analysis system, and the input terminals of the multi-channel synchronous acquisition board are also connected to the output terminals of the synchronous signal output module.

The synchronization signal output module includes a 1PPS second pulse synchronization signal output unit and an IRIG-B code pair optical pulse signal output unit.

The data receiving unit adopts FPGA, and the data forwarding unit adopts microprocessor.

The data analysis system adopts a PC upper computer.

The invention samples and calibrates the time scale of the analog signal of the primary power of the smart substation through the standard signal acquisition module, and provides a standard source for comparison for the time characteristic test of the merging unit; The reception, synchronous processing and forwarding of the sampling data in the form of data analysis system is used to realize the time characteristic test of the equipment of each layer of the smart substation, which greatly improves the debugging speed of the smart substation and provides a good technical guarantee for the rapid development and construction of the smart substation. , Laying a solid foundation for the safe and stable operation of smart substations.

Description of drawings

Fig. 1 is a functional block diagram of the present invention.

detailed description

As shown in Figure 1, the intelligent substation system-level time characteristic testing device according to the present invention includes a data transmission system and a data analysis system. The data transmission system includes a standard signal acquisition module, a data processing forwarding module and a synchronization signal output module. The standard signal The acquisition module and the data processing and forwarding module are connected to the data analysis system, and the output end of the synchronous signal output module is connected to the input end of the standard signal acquisition module and the input end of the data processing and forwarding module.

The standard signal acquisition module includes a standard voltage acquisition unit, a standard current acquisition unit and a multi-channel synchronous acquisition board. The standard voltage acquisition unit includes a standard voltage transformer and a voltage signal converter. The output of the standard voltage transformer is connected to the input of the voltage signal converter. The output terminal of the voltage signal converter is connected to the input terminal of the multi-channel synchronous acquisition board; the standard current acquisition unit includes a standard current transformer and a current signal converter, and the output terminal of the standard current transformer is connected to the input terminal of the current signal converter. The output end of the current signal converter is connected to the input end of the multi-channel synchronous acquisition board, the multi-channel synchronous acquisition board is connected to the data analysis system, and the input end of the multi-channel synchronous acquisition board is also connected to the output end of the synchronous signal output module. The standard signal acquisition module is used to obtain the analog signal of the primary power of the smart substation, and samples the analog signal based on the clock beat of the synchronous signal output module, and submits the obtained standard sampling data to the data analysis system as a comparison of the time characteristic test of the merged unit Signal. Specifically, the standard voltage transformer converts the primary voltage of the smart substation into a secondary voltage. After the voltage signal converter, the secondary voltage becomes a small voltage signal for A/D conversion. Similarly, the standard current transformer converts the smart The primary current of the substation is converted into a secondary current, and after passing through the current signal converter, the secondary current becomes a small current signal for A/D conversion. The multi-channel synchronous acquisition board is based on the clock beat of the synchronous signal output module for the small voltage signal and The small current signal is collected with high precision, and the standard sampling data with time scale is transmitted to the data analysis system as a comparison standard source for the time characteristic test of the merged unit.

The data processing and forwarding module includes a data receiving unit and a data forwarding unit. In this embodiment, the data receiving unit is realized by an FPGA, and the data forwarding unit is realized by a microprocessor. The data receiving unit is connected with the data forwarding unit through a shared dual-port memory, that is, a dual-port RAM, and can realize data exchange every 1ms. Among them, the peripheral circuit of the data receiving unit includes the second pulse synchronization signal receiving unit, the Ethernet data receiving unit and the FT3 sampling value data receiving unit. The FT3 sampling value data receiving unit adopts two sets of HFBR-2416 optical receiving devices, which can adaptively receive IEC60044-8 standard or the FT3 sampling value data of the national grid standard; the Ethernet data receiving unit adopts two sets of AFBR-5803 Ethernet transceiver devices, which are directly controlled by FPGA, and can realize the reception of two sets of SV messages or Goose messages, among which The SV message is the sampling value data output by the tested merging unit in compliance with the IEC61850-9-1 or IEC61850-9-2 protocol, and the Goose message is the general object-oriented substation event sent by the protection measurement and control device and the intelligent switchgear. The data receiving unit monitors the 1PPS second pulse synchronization signal or the IRIG-B code pair optical pulse signal, and receives the SV message sent by the tested merging unit of the smart substation in real time, the FT3 sampling value data conforming to the IEC60044-8 standard or the national grid standard, and the protection The Goose message sent by the measurement and control device and the Goose message sent by the intelligent switchgear, and respectively record the arrival time information of the SV message of the merged unit under test, the FT3 sampling value data, the Goose message of the protection measurement and control device, and the Goose message of the intelligent switchgear , the data receiving unit is also used for real-time acquisition of the switching signal of the intelligent switching device. The data forwarding unit is used to respectively mark the arrival time information on the SV message of the merging unit under test, the Goose message of the protection measurement and control device, and the Goose message of the intelligent switch equipment, and form the SV message of the merging unit under test and the Goose report of the protection measurement and control device with time stamps. The text and the smart switch equipment Goose message are sent to the data analysis system. Since the data analysis system cannot directly receive the sampled value data in FT3 format, the data forwarding unit is also used to mark the arrival time information on the FT3 sampled value data, and convert the FT3 sampled value data with time stamp into the IEC61850-9-1 protocol form and pass The Ethernet is transmitted to the data analysis system, and the data forwarding unit is also used to transmit the switching signal of the intelligent switching device to the data analysis system.

The synchronization signal output module includes a 1PPS second pulse synchronization signal output unit and an IRIG-B code pair optical pulse signal output unit, which can output a 1PPS second pulse synchronization signal or an IRIG-B code pair optical pulse signal respectively. The data receiving unit of the synchronous acquisition board and the data processing forwarding module provides the second pulse synchronous signal.

The data analysis system in this embodiment adopts a PC upper computer, and the data analysis system is used to extract and compare the fundamental wave phase of the standard sampling data output by the standard signal acquisition module and the FT3 sampling value data output by the data processing and forwarding module, so as to realize the smart substation being The time characteristic test of the test merging unit; the data analysis system is also used to compare the time stamp information of the SV message of the tested merging unit output by the data processing and forwarding module and the Goose message of the protection measurement and control device, so as to realize the time characteristic test of the protection measurement and control device; the data The analysis system is also used to compare the time stamp information of the Goose message of the smart switch device output by the data processing and forwarding module with the displacement information of the switch signal, so as to realize the time characteristic test of the smart switch device.

The working principle of the present invention is: the standard signal acquisition module samples the analog signal of the primary power of the smart substation based on the clock beat of the synchronous signal output module, and submits the standard sampling data with time scale to the data analysis system; uses the data processing and forwarding module to obtain The tested merging unit samples the analog signal of the primary power of the smart substation and outputs the FT3 sampled value data and records its arrival time information, converts the FT3 sampled value data with time stamp into the form of IEC61850-9-1 protocol and transmits it through Ethernet To the data analysis system; the data analysis system performs interpolation processing on the FT3 sampling value data with time scale to obtain synchronous sampling data, and completes voltage and current accuracy comparison, Phase synchronization check and absolute delay time measurement to realize the time characteristic test of the merging unit.

The data processing and forwarding module of the present invention can receive the Goose message sent by the intelligent substation protection measurement and control device and the SV message sent by the tested merging unit, and record the Goose message of the protection measurement and control device based on the second pulse synchronization signal output by the synchronization signal output module and the arrival time information of the SV message of the merged unit under test to form the Goose message of the protection measurement and control device with time stamp and the SV message of the merged unit under test and then submit it to the data analysis system. The time stamp information of the Goose message of the protection measurement and control device is used to calculate the action time limit of the relay protection when a fault occurs, and the time characteristic test of the protection measurement and control device is completed.

The invention obtains the Goose message sent by the intelligent switch device through the data processing and forwarding module, records the arrival time information of the Goose message of the intelligent switch device, forms the Goose message of the intelligent switch device with a time stamp, and transmits it to the data analysis system, and collects it in real time at the same time The switch signal of the smart switch device is submitted to the data analysis system, and the data analysis system calculates the time stamp information of the Goose message received and processed by the smart switch device according to the time stamp information of the Goose message of the smart switch device and the displacement information of the switch opening/closing state. The delay time and the delay time of the switch opening/closing status of the smart switch device and the delay time of sending the Goose message are completed to complete the time characteristic test of the smart switch device.

The invention can realize the time characteristic test of the tested merging unit, the protection measurement and control device and the intelligent switchgear of the intelligent substation, greatly improves the debugging speed of the intelligent substation, and provides a good technical guarantee for the rapid development and construction of the intelligent substation. The safe and stable operation has laid a solid foundation.

Claims (6)

1. Intelligent substation system-level time characteristic testing device is characterized in that: it includes a data transmission system and a data analysis system, and the data transmission system includes a standard signal acquisition module, a data processing forwarding module and a synchronous signal output module, and the standard signal acquisition module The data processing and forwarding module is connected to the data analysis system, and the output terminal of the synchronous signal output module is connected to the input terminal of the standard signal acquisition module and the input terminal of the data processing and forwarding module; the standard signal acquisition module is used to obtain the analog signal of the primary power of the smart substation, and The analog signal is sampled based on the clock beat of the synchronous signal output module, and the obtained standard sampling data is submitted to the data analysis system; the data processing and forwarding module is used to receive the FT3 sampling value data sent by the tested merging unit of the smart substation, and mark the arrival time Information and format conversion, submit the FT3 sampling value data with time stamp to the data analysis system through Ethernet; the data processing and forwarding module is also used to receive the SV message sent by the tested merging unit of the smart substation and mark the arrival time information, which will bring The time-scaled SV message of the merged unit under test is submitted to the data analysis system; the data processing and forwarding module is also used to receive the Goose message sent by the intelligent substation protection measurement and control device and the Goose message sent by the intelligent switchgear, and mark the arrival time information respectively, and The Goose message of the protection measurement and control device with time stamp and the Goose message of the intelligent switch equipment are submitted to the data analysis system; the data processing and forwarding module is also used to collect the switch signal of the intelligent switch equipment in real time and submit it to the data analysis system; the synchronous signal output module is used The second pulse synchronization signal is output; the data analysis system is used to extract and compare the fundamental wave phase of the standard sampling data output by the standard signal acquisition module and the FT3 sampling value data output by the data processing and forwarding module, so as to realize the time characteristics of the tested merging unit of the smart substation Test; the data analysis system is also used to compare the time stamp information of the tested merging unit SV message output by the data processing and forwarding module and the Goose message of the protection measurement and control device, so as to realize the time characteristic test of the protection measurement and control device; the data analysis system is also used for comparison The time stamp information of the smart switch device Goose message and the displacement information of the switch signal output by the data processing and forwarding module realize the time characteristic test of the smart switch device. 2. The intelligent substation system-level time characteristic testing device according to claim 1, wherein the data processing and forwarding module includes a data receiving unit and a data forwarding unit, and the data receiving unit communicates with the data forwarding unit through a shared dual-port memory Unit connection, the data receiving unit is used to receive the SV message sent by the tested merging unit of the smart substation, the FT3 sampling value data conforming to the IEC60044-8 standard or the national grid standard, the Goose message sent by the protection measurement and control device, and the smart switch device. Goose message, and respectively record the arrival time information of the tested merging unit SV message, FT3 sampling value data, protection measurement and control device Goose message and intelligent switch equipment Goose message, and the data receiving unit is also used for real-time collection of intelligent switch equipment. Switching signal; the data forwarding unit is used to respectively mark the arrival time information on the SV message of the combined unit under test, the Goose message of the protection measurement and control device and the Goose message of the intelligent switch equipment, and form the SV message of the combined unit under test, the protection The Goose message of the measurement and control device and the Goose message of the intelligent switching device are sent to the data analysis system. The data forwarding unit is also used to mark the arrival time information of the FT3 sampled value data, and convert the FT3 sampled value data with time stamp into IEC61850-9- 1 After the protocol form is transmitted to the data analysis system through the Ethernet, the data forwarding unit is also used to transmit the switching signal of the intelligent switching device to the data analysis system. 3. The intelligent substation system-level time characteristic test device as claimed in claim 1 or 2, characterized in that: the standard signal acquisition module includes a standard voltage acquisition unit, a standard current acquisition unit and a multi-channel synchronous acquisition board, and the standard voltage The acquisition unit includes a standard voltage transformer and a voltage signal converter, the output of the standard voltage transformer is connected to the input of the voltage signal converter, the standard current acquisition unit includes a standard current transformer and a current signal converter, the output of the standard current transformer The terminal is connected to the input terminal of the current signal converter, the output terminal of the voltage signal converter and the output terminal of the current signal converter are respectively connected to the input terminals of the multi-channel synchronous acquisition board, and the multi-channel synchronous acquisition board is connected to the data analysis system, and the multi-channel synchronous acquisition The input end of the board is also connected to the output end of the synchronous signal output module. 4. The system-level time characteristic testing device of an intelligent substation according to claim 3, wherein the synchronization signal output module includes a 1PPS second pulse synchronization signal output unit and an IRIG-B code pair optical pulse signal output unit. 5 . The system-level time characteristic testing device of an intelligent substation according to claim 4 , wherein the data receiving unit adopts an FPGA, and the data forwarding unit adopts a microprocessor. 6 . 6. The system-level time characteristic test device of an intelligent substation according to claim 5, wherein the data analysis system adopts a PC upper computer.