CN103885438B - The Auto-Test System of a kind of transformer station measuring and controlling equipment and method - Google Patents

Abstract

The present invention provides Auto-Test System and the method for a kind of transformer station measuring and controlling equipment, and system includes test background server, switch, network tester, intelligent tester, three-phase standard scale, controllable electric power and gps clock module；Described network tester, intelligent tester, three-phase standard scale and controllable electric power are respectively by carrying out data exchange between switch and test background server, described test background server is communicated with described measuring and controlling equipment by procotol, controlling controllable electric power is that measuring and controlling equipment is powered, and is realized the time synchronized of test background server and measuring and controlling equipment by gps clock module simultaneously.The Auto-Test System of transformer station's measuring and controlling equipment that the present invention provides and method, it is capable of the automatically generating of test assignment, automatically performing of detecting step and automatically generating of examining report, reduce artifact interference, get rid of test randomness, improve testing efficiency and the reliability of test, realize test repeatability, it is ensured that the trackability of test job, ensure reliability and the concordance of test result.

Description

An automatic test system and method for substation measurement and control equipment

technical field

The invention belongs to the technical field of automatic equipment testing, and in particular relates to an automatic testing system and method for substation measurement and control equipment.

Background technique

At present, with the development of smart grid scheduling automation and smart substation construction, many scientific research institutes and universities at home and abroad have carried out related smart substation experiments and testing technology research work, but there are few tests on the grid dispatching master station automation system. Some test instrument manufacturers at home and abroad have begun to develop secondary equipment testers such as intelligent substation relay protection. The power system test device developed by OMICRON provides support for IEC61850 in versions above v2.22. Domestic Zhongyuan Huadian, Bodian, Guangfuhui and other protection tester manufacturers have also carried out the research and development of intelligent substation protection testers, but at present, there is no comprehensive inspection platform capable of comprehensive inspection of dispatching automation and substation automation systems at home and abroad. The research on the automatic test technology of substation measurement and control equipment has not been fully developed, and no complete papers on this technology can be found.

With the development of power automation technology, many new products of substation automation system are put into use and upgraded every year, and testing tools for substation automation system and various application functions are needed, but there is no automated test for substation measurement and control equipment in the market Tools, especially the lack of automatic detection methods for substation measurement and control equipment, all tests are basically still in the manual test stage, the degree of automation is not high, the test methods and test instruments are relatively backward, the standardization of testing, closed-loop testing, and testing reports There are great deficiencies in standardization, transparency of the testing process, and scalability of testing. Aiming at the new characteristics of substation measurement and control equipment testing, a new method of automatic testing of intelligent substation measurement and control equipment is studied, which can realize the automatic generation of test tasks, automatic execution of detection steps and automatic generation of detection reports, reduce artificial factor interference, and eliminate test randomness. Improve test efficiency and test reliability, realize test repeatability, ensure the traceability of test work, and ensure the reliability and consistency of test results.

Contents of the invention

In order to overcome the deficiencies of the prior art above, the present invention provides an automatic test system and method for substation measurement and control equipment, which can realize the automatic generation of test tasks, the automatic execution of detection steps and the automatic generation of detection reports, reduce the interference of artificial factors, eliminate Test randomness, improve test efficiency and test reliability, realize test repeatability, ensure the traceability of test work, and ensure the reliability and consistency of test results.

In order to realize the above-mentioned purpose of the invention, the present invention takes the following technical solutions:

The invention provides an automatic test system for substation measurement and control equipment, the system includes a test background server, a switch, a network tester, an intelligent tester, a three-phase standard meter, a controllable power supply and a GPS clock module; the network tester, The intelligent tester, the three-phase standard meter and the controllable power supply exchange data with the test background server respectively through the switch, and the test background server communicates with the measurement and control equipment through the network protocol, controls the controllable power supply to supply power for the measurement and control equipment, At the same time, the time synchronization between the test background server and the measurement and control equipment is realized through the GPS clock module.

The test background server communicates with the measurement and control equipment through the IEC60870-5104 communication protocol or the IEC61850 communication standard.

The test background server controls the controllable power supply to output an AC voltage of 176V-253V, so as to supply power for the measurement and control equipment.

The test background server controls the intelligent tester, thereby controlling the test process, and reads the data of the three-phase standard meter and the data of the measurement and control equipment, performs data processing and analysis, and finally forms a test report.

The system receives the GPS time synchronization signal through the GPS clock module to ensure the time synchronization of the test background server, the intelligent tester and the measurement and control equipment.

The present invention also provides an automatic test method for substation measurement and control equipment, characterized in that: the method includes the following steps:

Step 1: the test background server collects the internal data information of the measurement and control equipment;

Step 2: The test background server communicates with the measurement and control equipment and the controllable power supply;

Step 3: Automatically test the measurement and control equipment, and control the testing process of the measurement and control equipment;

Step 4: Read the data of the three-phase standard meter, compare it with the collected measurement and control equipment data, perform data processing and analysis, and record the test results;

Step 5: The test background server automatically analyzes the test results and generates a test report.

In the step 2, the test background server controls the controllable power supply to output voltages of 176V, 220V, and 253V respectively, and records the telemetry value, remote signal, and remote control of the measurement and control equipment at the above three voltage levels, and passes and reads the intelligent The tester and three-phase standard table data are analyzed and calculated to determine the correctness of the function and performance of the measurement and control equipment when the power supply is 176V-253V.

In the step 3, the test content of the automatic test of the measurement and control equipment includes the communication protocol test between the measurement and control equipment and the dispatching automation master station, the measurement and control equipment analog quantity test, the measurement and control equipment digital quantity test, the measurement and control equipment time synchronization and response time test, The power supply of the measurement and control equipment affects the test and the stable operation of the measurement and control equipment is automatically tested regularly.

In the communication protocol test between the measurement and control equipment and the dispatching automation master station, the measurement and control equipment meets the IEC60870-5104 communication protocol or the IEC61850 communication standard, and the switching value and AC telemetry are simulated by the automatic test system to complete the measurement and control equipment and the dispatching automation master station Inter-communication protocol test, and implement the protocol consistency test through the test background server;

Measurement and control equipment analog quantity test includes basic telemetry test and AC telemetry influence quantity test, AC telemetry influence quantity test includes frequency change influence test, three-phase active/reactive power test under three-phase current unbalanced condition, and harmonic component voltage/current /Active/reactive power test, three-phase voltage/current over-limit test, inter-line impact test, power factor change impact test, self-heating impact test, continuous over-input test, short-term over-input post-test and fault current test;

The digital quantity test of the measurement and control equipment includes the correctness test of the remote signal displacement, the internal resolution test of the event sequence record, the remote signal avalanche processing capability test and the anti-shake function test of the event sequence record;

The test content of the time synchronization and response time test of the measurement and control equipment includes the time synchronization function test of the measurement and control equipment, the response time test of the remote signaling data and the response time test of the telemetry data;

In the power impact test of the measurement and control equipment, the controllable power supply provides power for the measurement and control equipment, and the output voltage is below 253V DC and AC 253V. The power impact test of the measurement and control equipment can be completed by controlling the output of the controllable power supply through the test background server;

In the automatic timing test of the stable operation of the measurement and control equipment, by setting the timing output of the intelligent tester on the test background server, the timing test of the 72-hour continuous and stable power-on test of the measurement and control equipment is realized.

In the step 4, the test background server controls the test process by controlling the intelligent tester and the controllable power supply, reads the three-phase standard table data and the data sent by the measurement and control equipment, and performs data processing and analysis. It meets the testing standard of "GB/T13729 Telecontrol Terminal Equipment"; the error when testing the measurement and control equipment is the error between the output value of the intelligent tester and the data of the measurement and control equipment.

In the step 5, the test background server first generates a report template according to the set detection report template and selected test items, and then fills the test results into the report template correspondingly according to the test content and calculation results; in this process, the test The background server sets different priorities according to different users, so as to meet the requirements of controlling the authenticity of the detection report and increase the flexibility of the detection report.

Compared with prior art, the beneficial effect of the present invention is:

According to the requirements of each test task, it can realize the automatic generation of test tasks, automatic execution of detection steps and automatic generation of test reports, reduce the interference of human factors, eliminate test randomness, improve test efficiency and test reliability, and realize test repeatability. Guarantee the traceability of the test work and the reliability and consistency of the test results.

In addition, through the construction of an automatic test platform, a set of methods, methods and specific index systems for evaluating the performance of measurement and control equipment can be formed, an effective detection and evaluation standard system can be established, the overall performance of smart substations can be effectively evaluated, and the detection of measurement and control equipment can be promoted. Standardization, and then promote the orderly, effective and practical construction of smart substations, creating significant economic and social benefits.

Description of drawings

Figure 1 is a schematic diagram of an automatic test system for substation measurement and control equipment;

Fig. 2 is a flow chart of automatic generation of test reports in the automatic test method of substation measurement and control equipment.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of an automatic test system for substation measurement and control equipment based on Ethernet communication. Ethernet communication has the characteristics of fast network speed, wide bandwidth, simple network structure, unified network equipment standards, and convenient interface with the test background computer. Real-time access between nodes becomes a reality. Each device in the automatic test system is connected through Ethernet, and the communication protocol uses the standard IEC60870-5104 and IEC61850 protocol, and is distinguished by the IP address of different devices. The automatic test system realizes the time synchronization of the automatic test system through the GPS satellite clock, which can realize the operation monitoring of the test instrument and the tested equipment in the system under the unified GPS time reference, which improves the time accuracy of the time sequence record and increases the amount of AC collection The reliability of the data improves the accuracy of the test.

As the core component of this automatic test system, the test background server uses a computer to complete the following functions:

Determine the content to be tested for substation measurement and control equipment according to the testing requirements;

Control the intelligent tester and controllable power supply to control the test process;

Read the data of the three-phase high-precision meter and the data sent by the device under test, and perform data processing and analysis;

Generate test reports based on test content and test data;

Substation measurement and control equipment automatic test experiment platform test content:

1. Test of communication protocol between substation measurement and control equipment and dispatching automation master station

The communication between the equipment of the automatic test experiment platform of the intelligent substation measurement and control equipment uses the communication protocol conforming to the IEC60870-5104 or IEC61850 standard. When the equipment under test is connected to the test system, it must first meet the IEC60870-5104 or IEC61850 standard. In addition, through the automatic test system to simulate and generate various switching values, AC remote measurement and other data, the intelligent substation measurement and control equipment can be completed based on IEC60870-5104 or IEC60870-5104 or The test of the communication protocol of the IEC61850 standard can also use the test background protocol communication protocol test software to realize the protocol conformance test.

2. Analog measurement of substation measurement and control equipment

Substation measurement and control equipment is the data collection and command execution unit in the intelligent substation integrated automation system. One of its important tasks is to complete the collection, processing and uploading of substation analog telemetry data, and judge the operation of the substation through the sampled analog telemetry data. In order to provide comprehensive data support for the dispatching master station to comprehensively analyze the operation safety of substations and power grids, in the detection process of substation measurement and control equipment, the collection, processing and uploading functions of analog telemetry data of substation measurement and control equipment are also important in the detection. Content, analog telemetry data detection is mainly divided into two parts:

The first part is the basic telemetry test, which mainly includes:

1. AC telemetry three-phase voltage and current (0-100% range);

2. AC telemetry active power when the power factor is 1 and reactive power when the power factor is 0 (0-100% range);

3. Active power when AC telemetry power factor is 0.5L, 0.5C;

4. The reactive power when the AC telemetry power factor is 0.866L and 0.866C;

5. DC telemetry analog input A/D error test.

The second part is the AC telemetry impact test, which mainly includes:

1. Frequency change impact test: 45Hz, 50Hz, 55Hz three-phase voltage, current, active power when the power factor is 1 and reactive power when the power factor is 0 (measurement range 0-100%);

2. Three-phase active and reactive power test under the condition of unbalanced three-phase current;

3. Add harmonic component voltage, current, active power and reactive power test;

4. Three-phase voltage and current over-limit (120%) test;

5. Inter-line influence test: (Ua=Ub=rated value, Uc=0V; Ia=Ib=0A, Ic=rated value);

6. Power factor change impact test: active power (phase angle is 0°, 70°, 290°) test, reactive power (phase angle is 90°, 20°, 160°) test

7. Self-heating effect test:

a) Three-phase voltage and current of the equipment under test starting for 1-3 minutes, active power when the power factor is 1, and reactive power when the power factor is 0 (measurement range 0-100%);

b) The three-phase voltage and current of the equipment under test starting for 30-35 minutes, the active power when the power factor is 1 and the reactive power when the power x factor is 0 (0-100% range);

8. Test after continuous over-input: test the three-phase voltage and current after continuously inputting three-phase voltage and current 120% of the rated value for two hours, the active power when the power factor is 1 and the reactive power when the power factor is 0 (0 ~100% range);

9. Test after short-term over-input: 20 times A/s CT rated current, 5 minutes apart, five times in total; 2 times V/s PT rated current, 5 minutes apart, five times in total;

10. Fault current test: current output (2.5In, 10In, 20In optional) test.

3. Digital quantity test of substation measurement and control equipment

Substation measurement and control equipment is used as the data acquisition and command execution unit in the intelligent substation integrated automation system. Another important task is to complete the functions of substation related switch input signal acquisition, event recording, and control of circuit breakers and isolating switches. In daily terms, remote signaling, SOE collection, remote control functions for primary equipment such as circuit breakers and isolating switches, and secondary equipment soft pressure plates, etc., and remote adjustment functions for transformer taps, etc. The collection of remote signaling and SOE provides strong evidence for the analysis of fault conditions and the sequence of equipment actions such as circuit breakers, and creates good technical conditions for the safety and stability monitoring and control system of the power grid; The remote control function of primary equipment and secondary equipment, such as soft pressure plates, and the remote adjustment function of transformer taps, etc. provide the possibility to realize unattended substations. In the detection process of substation measurement and control equipment, remote signaling, SOE (sequence of events record), and remote control functions of substation measurement and control equipment are also important contents in the detection. The digital quantity detection mainly includes the following parts: 1. Remote signal displacement correctness test ; 2. SOE station resolution test; 3. Remote signaling avalanche processing capability test; 4. SOE anti-shake function test.

4. Time synchronization and response time test of substation measurement and control IED equipment

With the improvement of substation automation level, computer monitoring system, microcomputer protection device, microcomputer fault recording device and various data management machines have been widely used in comprehensive automatic substations, and the cooperation of these automatic devices requires a precise and unified time. When a fault occurs in the power system, the operation monitoring and post-accident fault analysis of all systems in the whole station can be realized under the same time base, and the cause of the accident can also be analyzed through the sequence of protection actions, switch opening and closing, and accurate time. process. With the increasing complexity of the power grid and the expansion of the power grid, it is an urgent need to provide a standard time clock reference for the substation and even the entire power system. The unification of the clock is an important measure to ensure the safe operation of the power system and improve the operation level. One of the most basic requirements of the system. Therefore, the time synchronization function of substation measurement and control equipment and the response time of telemetry and remote signaling are also one of the items that need to be key tested.

In recent years, the time synchronization of almost all substation measurement and control equipment is mainly based on the GPS clock satellite synchronization system, so this automatic test system mainly considers the GPS time synchronization method. The main test contents are: 1. Time synchronization function test of substation measurement and control equipment; 2. Remote signaling data response time test; 3. Telemetry data response time test.

5. Power supply impact test of substation measurement and control equipment

According to the detection standard of "GB/T13729 Telecontrol Terminal Equipment", when the substation measurement and control equipment changes between -20% and 15% of the rated power supply, the substation measurement and control equipment should be able to work normally. On the automatic test experiment platform, the intelligent controllable power supply provides power for the substation measurement and control equipment under test. It can output voltages below DC 264V and AC 264V according to different requirements, and the substation measurement and control equipment can be completed by controlling the output of the controllable power supply through the test background. Power Impact Test.

6. Timed automatic test for stable operation of substation measurement and control equipment

According to the testing standard of "GB/T13729 Telecontrol Terminal Equipment", the substation measurement and control equipment shall be subjected to a continuous and stable power-on test for no less than 72 hours before leaving the factory to assess its stability. By setting in the test background, you can set the timing output of the intelligent tester, so as to realize the timing test of the 72-hour continuous and stable power-on test.

3) Data processing and analysis function of automatic test experiment platform for substation measurement and control equipment

The test background not only needs to be able to control the intelligent tester and controllable power supply to control the test process, but also needs to read the data of the three-phase high-precision meter and the data sent by the device under test and perform data processing and analysis. An important indicator for the test of substation measurement and control equipment is The error of the analog quantity needs to meet the testing standard of "GB/T13729 Telecontrol Terminal Equipment". In the measurement work, a lot of practice has shown that when a measuring instrument is used to make multiple observations of an unknown quantity, there will always be differences between the observed values, which is the measurement error. The main reasons for the measurement error are: instrument error, observation error and external environment. Measurement errors can be divided into three categories: systematic errors, accidental errors, and gross errors according to their causes and the nature of their impact on observation results. There are two main errors when testing substation measurement and control equipment: 1. The error between the output value of the intelligent tester and the sampling data of the substation measurement and control equipment; variation between. The test background needs to calculate and output different errors according to different test items.

4) Automatic test report function of automatic test platform for substation measurement and control equipment

The last function to be completed in the test background is to automatically generate a test report based on the test content, test data and calculation results, so as to complete all tests. First, the functional test background needs to be able to generate a specific report template according to the set test report template and selected test items, and then the test background needs to be able to fill in the test results into the report template according to the test content and calculation results. In this process, different priorities can be set according to different users, so as to not only meet the requirement of controlling the authenticity of the test report, but also increase the flexibility of the test report.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (9)

1. an automatic testing method of substation measurement and control equipment, is characterized in that: described method comprises the following steps: Step 1: the test background server collects the internal data information of the measurement and control equipment; Step 2: The test background server communicates with the measurement and control equipment and the controllable power supply; Step 3: Automatically test the measurement and control equipment, and control the testing process of the measurement and control equipment; Step 4: Read the data of the three-phase standard meter, compare it with the data collected from the measurement and control equipment, perform data processing and analysis, and record the test results; Step 5: the test background server automatically analyzes the test results and generates a test report; In the step 3, the test content of the automatic test of the measurement and control equipment includes the communication protocol test between the measurement and control equipment and the dispatching automation master station, the measurement and control equipment analog quantity test, the measurement and control equipment digital quantity test, the measurement and control equipment time synchronization and response time test, The power supply of the measurement and control equipment affects the test and the automatic test of the stable operation of the measurement and control equipment; In the communication protocol test between the measurement and control equipment and the dispatching automation master station, the measurement and control equipment meets the IEC60870-5104 communication protocol or the IEC61850 communication standard, and the switching value and AC telemetry are simulated by the automatic test system to complete the measurement and control equipment and the dispatching automation master station Inter-communication protocol test, and implement the protocol consistency test through the test background server; Measurement and control equipment analog quantity test includes basic telemetry test and AC telemetry influence quantity test, AC telemetry influence quantity test includes frequency change influence test, three-phase active/reactive power test under three-phase current unbalanced condition, and harmonic component voltage/current /Active/reactive power test, three-phase voltage/current over-limit test, inter-line impact test, power factor change impact test, self-heating impact test, continuous over-input test, short-term over-input post-test and fault current test; The digital quantity test of the measurement and control equipment includes the correctness test of the remote signal displacement, the internal resolution test of the event sequence record, the remote signal avalanche processing capability test and the anti-shake function test of the event sequence record; The test content of the time synchronization and response time test of the measurement and control equipment includes the time synchronization function test of the measurement and control equipment, the response time test of the remote signaling data and the response time test of the telemetry data; In the power impact test of the measurement and control equipment, the controllable power supply provides power for the measurement and control equipment, and the output voltage is below 253V DC and AC 253V. The power impact test of the measurement and control equipment can be completed by controlling the output of the controllable power supply through the test background server; In the automatic timing test of the stable operation of the measurement and control equipment, by setting the timing output of the intelligent tester on the test background server, the timing test of the 72-hour continuous and stable power-on test of the measurement and control equipment is realized. 2. The automatic testing method of substation measurement and control equipment according to claim 1, characterized in that: in said step 2, the test background server controls the controllable power supply to output voltages of 176V, 220V, and 253V respectively, and records the measurement and control equipment at The remote measurement value, remote signal and remote control at the above three voltage levels are analyzed and calculated with the read intelligent tester and three-phase standard table data, so as to determine the function and performance of the power supply of the measurement and control equipment when it is 176V ~ 253V correctness. 3. the automatic test method of substation measurement and control equipment according to claim 1, is characterized in that: in described step 4, test background server controls test process by controlling intelligent tester and controllable power supply, reads three-phase standard table The data and the measurement and control equipment send data and perform data processing and analysis. The error of the test analog quantity of the measurement and control equipment must meet the detection standard of "GB/T 13729 Telecontrol Terminal Equipment"; the error when testing the measurement and control equipment is the output value of the intelligent tester The error between the measurement and control equipment data. 4. the automatic test method of substation measurement and control equipment according to claim 1, is characterized in that: in described step 5, test background server at first generates report template according to the detection report template of setting and selected test item, then according to Test content and calculation results Fill in the test results into the report template; in the process, the test background server sets different priorities according to different users to meet the requirements of controlling the authenticity of the test report and increase the flexibility of the test report . 5. the automatic test method of substation measurement and control equipment according to claim 1, is characterized in that: described method adopts automatic test system to realize; Described automatic test system comprises test background server, switch, network tester, intelligent tester, Three-phase standard meter, controllable power supply and GPS clock module; described network tester, intelligent tester, three-phase standard meter and controllable power supply carry out data exchange respectively through switchboard and test background server, and described test background server passes The network protocol communicates with the measurement and control equipment, controls the controllable power supply to supply power for the measurement and control equipment, and realizes the time synchronization between the test background server and the measurement and control equipment through the GPS clock module. 6 . The automatic testing method for substation measurement and control equipment according to claim 5 , wherein the test background server communicates with the measurement and control equipment through the IEC60870-5104 communication protocol or the IEC61850 communication standard. 7 . The automatic testing method for substation measurement and control equipment according to claim 5 , wherein the test background server controls the controllable power supply to output an AC voltage of 176V-253V, so as to supply power for the measurement and control equipment. 8 . 8. The automatic test method of substation measurement and control equipment according to claim 5, characterized in that: the test background server controls the intelligent tester, thereby controlling the test process, and by reading the data of the three-phase standard table and the measurement and control Equipment data, data processing and analysis, and finally form a test report. 9. The automatic testing method of substation measurement and control equipment according to claim 5, characterized in that: said system receives GPS time synchronization signal through GPS clock module, to ensure the time synchronization of test background server, intelligent tester and measurement and control equipment.