CN204256149U - A kind of Performance Test System of merge cells tester - Google Patents

Abstract

The utility model discloses a performance test system of a combined unit tester, which comprises a clock module, a host computer module, a sampling value generator module and a voltage and current generator module; To the host computer module, the sampled value generator module, the voltage and current generator module and the merging unit tester to be tested, the signal output terminals of the sampled value generator module and the voltage and current generator module are all connected to the merging unit tester; the sampled value generation Both the generator module and the voltage and current generator module are controlled by the host computer; the sampling value generator module outputs the SV sampling value message, and the voltage and current generator module outputs the conforming power current transformer and The analog signal output by the power voltage transformer. The performance testing system of the combined unit tester has the characteristics of easy implementation, convenient operation and high testing efficiency.

Description

A Performance Test System Combined with Unit Tester

technical field

The utility model belongs to the technical field of power system testing, and relates to a performance testing system incorporating unit testers.

Background technique

The merging unit is an important electronic device operating in the process layer of the smart substation of the power system. It is used to collect the current analog quantity and voltage analog quantity induced by the secondary side of the power current transformer and voltage transformer or the sampling signal sent by the electronic transformer. And convert it into a digital sampling value signal conforming to the IEC61850-9-2 protocol or the IEC60044-8 protocol, and provide it to the intelligent electronic equipment located in the compartment layer of the intelligent substation for data processing. The important performance indicators of the merging unit include acquisition accuracy, delay characteristics, and message jitter characteristics. The performance of the merging unit directly affects the safety and reliability of the smart substation, so it is extremely important. The country has clear requirements for the above performance indicators of the merging unit in the promulgated related technical specifications of the merging unit, and at the same time stipulates that the testing tool for the performance of the merging unit—that is, the merging unit tester, should be inspected and qualified.

The merging unit tester collects the current analog quantity and voltage analog quantity or sampling signal collected by the merging unit, and at the same time collects the digital sampling value signal (ie SV message—Sample Value) sent by the merging unit, and compares them synchronously to form The test results of important performance indicators such as angular difference and amplitude difference accuracy inspection, rated delay accuracy inspection, and jitter accuracy inspection are used to judge whether the merging unit is qualified. But at present, there is no ready-made test equipment for checking the performance of the merging unit tester, and no special test method for the performance of the merging unit tester has been formed. That is to say, it is not allowed to test the performance of the merging unit with a merging unit tester that has not been certified. With the mass production and use of combined unit testers in the power system, this contradiction becomes more and more prominent. Therefore, it is very necessary to propose a test system that can accurately test the performance of the merging unit tester.

Utility model content

The technical problem to be solved by the utility model is to provide a performance testing system of a combined unit tester, which has the characteristics of easy implementation, convenient operation and high testing efficiency.

The technical solution of the utility model is as follows:

A performance test system incorporating a unit tester, including a clock module, a host computer module, a sampling value generator module and a voltage and current generator module;

4 channels of synchronous trigger signals output by the clock module at the same time [these 4 channels of signals are allowed to be different in carrier type or representation method (such as light or electricity as the carrier, signal transition or code transmission as the carrier) Representation methods, etc.), but the representation content is exactly the same (that is, the moment). ] are sent to the host computer module, sampled value generator module, voltage and current generator module and the merged unit tester to be tested to realize the synchronous operation of the above-mentioned modules in the same time system; the sampled value generator module and The signal output terminals of the voltage and current generator module are all connected to the unit tester;

Both the sampled value generator module and the voltage and current generator module are controlled by the host computer; the sampled value generator module outputs the SV sampled value message that can be received by the merging unit tester to be tested and conforms to the IEC61850 protocol, and the voltage and current generator module Outputting an analog signal that can be received by the merging unit tester to be tested conforms to the output of the power current transformer and the power voltage transformer.

[The sampling value generator module expands its functions on the basis of the commonly used optical digital relay tester, so that the commonly used relay tester can accept the command control and clock synchronization signal of the host computer; the voltage and current generator module is used in the relay test Based on the extension of its functions, the relay protection tester can accept the command control of the host computer and the clock synchronization signal. 】

Test process: set the eigenvalue parameter of the signal on the host computer and transmit the eigenvalue parameter to the sampling value generator module and the voltage and current generator module; the eigenvalue parameter is recorded as setting the eigenvalue parameter K1; the eigenvalue parameter includes the current signal and Amplitude, frequency, argument and jitter deviation of voltage signal;

In the merging unit tester, the signals output by the sampling value generator module and the voltage and current generator module are detected to obtain the characteristic value parameter of the signal, which is recorded as the test characteristic value parameter K2;

Compare K1 and K2 to verify whether the indicators of the tested combined unit tester meet the requirements.

The synchronous trigger signal adopts optical signal or electrical signal.

The synchronous trigger signal is PPS second pulse or IRIG-B code clock signal, and the time difference between each synchronous trigger signal should be less than 50ns.

The current-voltage generator simulates both a current transformer and a voltage transformer. The sampled value generator module outputs the SV sampled value message and does not simulate the behavior of the secondary side.

The role of the SV message: the SV message is the digital transmission information of the sampling value, which is an important part of the communication process between the process layer and the interval layer of the smart substation. It is used to exchange related model objects and services of the sampling value of the sampling data set. This patent The medium SV message uses the Ethernet message as the carrier, and transmits the analog signal corresponding to the output of the power current transformer and the power voltage transformer to the merging unit tester to be tested.

The testing idea of the utility model is: build a testing system, and connect with the combined unit tester to be tested through optical fibers and electric wires. The test system simulates the behavior of the power current transformer and the secondary side of the voltage transformer to generate analog quantities, and at the same time simulates the behavior of the merging unit device to generate SV messages, which are sent to the merging unit tester. By accurately adjusting the time difference and amplitude difference of the output signals of the above two devices simulated by the test system, and comparing them with the time difference and amplitude difference results displayed by the merging unit tester, the performance verification of the merging unit tester can be realized.

The clock module (1) is connected to the upper computer module (2) through the first synchronization signal output port (11), connected to the sampling value generator module (3) through the second synchronization signal output port (12), and connected to the sampling value generator module (3) through the third synchronization signal output port (11). The synchronization signal output port (13) is connected to the voltage and current generator module (4), and is connected to the tested merging unit tester through the fourth synchronization signal output terminal (14); the upper computer module (2) passes the first data The port (21) is connected to the sampled value generator module (3), and connected to the voltage and current generator module (4) through the second data port (22); the sampled value generator module (3) sends the sampled value message The port (31) is connected to the tested merging unit tester; the voltage and current generator module (4) is connected to the tested merging unit tester through the current and voltage signal generation port (41). The sampling value generator module is the SV generator module, and the voltage and current generator module is the VI generator module.

The clock module 1 is used to synchronize trigger signals, and can output various synchronization signals including PPS second pulses and IRIG-B code clock signals, and these signals are transmitted in the form of electrical codes or optical codes. The host computer module 2 is used to realize the human-computer interaction function, and issue instructions to control the sampling value generator module 3 and the voltage and current generator module 4 to work. The sampled value generator module 3 is used to send an SV message containing digital sampled value signals to the merging unit tester under test, and is connected to the merging unit tester under test through an optical fiber. The voltage and current generator module 4 is used to send analog voltage and current signals to the merging unit tester under test, and is connected to the merging unit tester under test through cables.

The clock dispersion of the clock module should be less than 10 ns, and the accuracy of the clock module itself is guaranteed by receiving global clock signals from GPS or Beidou satellites and its built-in high-precision clock source. The clock module should have at least 4 signal output terminals, which can be supplied to the host computer module, sampling value generator module, voltage and current generator module, and the tested merging unit tester; the time error between each output signal should be stable and less than ± 50ns.

The sample value generator module has flexibility in output performance and functional configuration, and can generate SV messages that meet the output requirements; the rated delay marked in the content of the SV message, the amplitude of each sampling channel, and the actual sending of the SV message The timing can be configured by receiving the control command from the upper computer module, and the timing accuracy error should be stable and less than ±200ns.

The voltage and current generator module should be able to output current and voltage analog signals that meet the requirements of the merged unit tester to be tested; it has 1-3 current channels and 1-4 voltage channels. The current analog signal output range is within the range of 0.1A to 30A, and the frequency range is within the DC and 50Hz AC fundamental wave to the 20th harmonic, in which the DC signal can be superimposed on the AC signal; the voltage analog signal output range is 0V to 150V Within the range, the frequency range is within the DC and 50Hz AC fundamental wave to the 20th harmonic, in which the DC signal can be superimposed on the AC signal; within the above range, the output accuracy of the current and voltage analog signals should not be lower than 0.05.

Due to the inevitable delay in the response of electronic equipment to the trigger signal, the response time characteristics of the above-mentioned sampling value generator module and voltage and current generator module selected for this implementation system to the trigger signal should be in the range of 0 to 200ns , and ensure that the deviation is consistent.

Beneficial effect:

The performance test system of the merging unit tester of the utility model is a test system capable of testing the accuracy of important test performances such as angle difference and amplitude difference, rated time delay and message jitter of the merging unit tester. The test system is connected to the merging unit tester under test through optical fibers and wires, and simulates the current and voltage analog quantities and sampled value messages, which are sent to the merging unit tester under test. By accurately adjusting the time difference and amplitude difference of the above-mentioned output signals simulated by the test system, and comparing them with the results displayed by the tested merging unit tester, in order to realize the performance verification of the tested merging unit tester, the system solves the problem of In the prior art, the main performance of the merging unit tester is not effectively tested.

Description of drawings

Figure 1 is a block diagram of the overall structure of the performance testing system that incorporates the unit tester.

Description of symbols: 1. Clock module; 2. Host computer module; 3. Sampling value generator module; 4. Voltage and current generator module; 11. First synchronization signal output port; 12. Second synchronization signal output port; 13. The third synchronization signal output port; 14. The fourth synchronization signal output port; 21. The first data port; 22. The second data port; 31. The SV message sending port; 41. The current and voltage semaphore generation port;

Detailed ways

The utility model will be described in further detail below in conjunction with accompanying drawing and specific embodiment:

Example 1:

As shown in Fig. 1, a performance test system of a combined unit tester includes a clock module, a host computer module, a sampling value generator module and a voltage and current generator module;

4 channels of synchronous trigger signals output by the clock module at the same time [these 4 channels of signals are allowed to be different in carrier type or representation method (such as light or electricity as the carrier, signal transition or code transmission as the carrier) Representation methods, etc.), but the representation content is exactly the same (that is, the moment). ] are sent to the host computer module, sampled value generator module, voltage and current generator module and the merged unit tester to be tested to realize the synchronous operation of the above-mentioned modules in the same time system; the sampled value generator module and The signal output terminals of the voltage and current generator module are all connected to the unit tester;

Both the sampled value generator module and the voltage and current generator module are controlled by the host computer; the sampled value generator module outputs the SV sampled value message that can be received by the merging unit tester to be tested and conforms to the IEC61850 protocol, and the voltage and current generator module Outputting an analog signal that can be received by the merging unit tester to be tested conforms to the output of the power current transformer and the power voltage transformer.

[The sampling value generator module expands its functions on the basis of the commonly used optical digital relay tester, so that the commonly used relay tester can accept the command control and clock synchronization signal of the host computer; the voltage and current generator module is used in the relay test Based on the extension of its functions, the relay protection tester can accept the command control of the host computer and the clock synchronization signal. 】

Set the eigenvalue parameter of the signal on the host computer and transmit the eigenvalue parameter to the sampling value generator module and the voltage and current generator module; the eigenvalue parameter is recorded as setting the eigenvalue parameter K1;

Eigenvalue parameters include amplitude, frequency, argument and jitter deviation of current signal and voltage signal;

In the merging unit tester, the signals output by the sampling value generator module and the voltage and current generator module are detected to obtain the characteristic value parameter of the signal, which is recorded as the test characteristic value parameter K2;

Compare K1 and K2 to verify whether the indicators of the tested combined unit tester meet the requirements.

The synchronous trigger signal adopts optical signal or electrical signal.

The synchronous trigger signal is PPS second pulse or IRIG-B code clock signal, and the time difference between each synchronous trigger signal should be less than 50ns.

The current-voltage generator simulates both a current transformer and a voltage transformer. The sampled value generator module outputs the SV sampled value message and does not simulate the behavior of the secondary side.

The working process of the performance test system of the merged unit tester; the characteristic value parameter is set by the upper computer module (2), and the preparation instruction, start instruction and Stop commands to control the testing process;

The test steps are as follows:

Step 1: Wiring:

Connect the upper computer module (2) and the sampling value generator module (3) with the data line through the first data port (21), for transmitting operation instructions;

Connect the upper computer module (2) and the voltage and current generator module (4) with the data line through the second data port (22), for transmitting operation instructions;

Connect the clock module (1) and the host computer module (2) through the first synchronization signal output port (11) with an optical fiber jumper or a signal wire, for transmitting a synchronization clock signal;

Connect the clock module (1) and the sampling value generator module (3) through the second synchronous signal output port (12) with an optical fiber jumper or a signal wire, for transmitting a synchronous clock signal;

Connect the clock module (1) and the voltage and current generator module (4) through the third synchronous signal output port (13) with an optical fiber jumper or a signal wire, for transmitting a synchronous clock signal;

The SV message sending port (31) of the sampling value generator module (3) is connected with the tested merging unit tester with an optical fiber jumper;

Connect the current and voltage signal generation port (41) of the voltage and current generator module (4) with the tested merging unit tester with an electric wire;

Connect the clock module (1) and the tested merging unit tester through the fourth synchronous signal output port (14) with an optical fiber jumper, for transmitting synchronous clock signals;

Step 2: System warm up:

Start each module of the test system and the merged unit tester to be tested, and preheat the test system for 5 to 10 minutes to make it in a stable and ready state;

Step 3: Set parameters and issue preparatory commands:

The experiment operator issues preparatory instructions to the sampling value generator module (3) and the voltage and current generator module (4) respectively through the human-computer interaction interface of the host computer module (2); the preparatory instructions are used to set the voltage and current generator module (4) The eigenvalue parameters of the output; the eigenvalue parameters output by the voltage and current generator module include the amplitude, frequency, angle, and jitter deviation of a certain parameter of the current analog quantity or voltage analog quantity; and set the sampling value generator module (3) The eigenvalue parameter of the SV message sampling value channel sent; the eigenvalue parameter of the SV message sampling value channel comprises amplitude, frequency, angle and rated time delay, and now the voltage and current generator module (4) only receives command, but does not output the current or voltage analog quantity; the sampling value generator module (3) only sends out the SV message with the set rated delay information and each sampling value channel is 0 after receiving the command;

Step 4: Start the testing process:

The experiment operator issues start commands to the sampling value generator module (3) and the voltage and current generator module (4) respectively through the human-computer interaction interface of the host computer module (2); The voltage and current generator module (4) and the sampling value generator module (3) in the working state continuously send the voltage and current analog quantity and the characteristic value parameter with the set deviation to the merged unit tester under test at the same time at the specified time. SV message;

Step 5: Record the test results and verify the results:

Record the performance index test results displayed by the tested merging unit tester. The performance index test results include the measured voltage and current amplitude, measurement delay value, and jitter accuracy measurement value; compare the performance index test results with the set characteristic value parameters, To verify whether the indicators of the tested merging unit tester meet the requirements;

Step 6: Stop the testing process:

The experiment operator issues stop commands to the sampling value generator module (3) and the voltage and current generator module (4) respectively through the human-computer interaction interface of the host computer module (2); the stop command causes the voltage and current in the working state to generate The generator module (4) and the sampling value generator module (3) stop the output signal, and return to the preparation state where the test system was in step 2 [or return to step 2 in order to prepare for the next test process].

The above-mentioned embodiments and explanations describe the principles and basic configurations of the present utility model, and the implementation naturally includes function upgrades and additional functions for realizing and perfecting the above-mentioned principles and basic configurations.

Claims (2)

1. a performance testing system of merging unit tester, is characterized in that, comprises clock module, host computer module, sampling value generator module and voltage current generator module; The 4 synchronous trigger signals output by the clock module at the same time are respectively sent to the upper computer module, the sampling value generator module, the voltage and current generator module and the merging unit tester to be tested, so as to realize the above-mentioned modules in the same time system The synchronous operation in; the signal output terminals of the sampling value generator module and the voltage and current generator module are all connected to the unit tester; Both the sampled value generator module and the voltage and current generator module are controlled by the host computer module; the sampled value generator module outputs the SV sampled value message that can be received by the merging unit tester to be tested and conforms to the IEC61850 protocol, and the voltage and current generator The module outputs an analog signal that can be received by the merging unit tester to be tested and conforms to the output of the power current transformer and the power voltage transformer. 2. The performance testing system of the merging unit tester according to claim 1, wherein the synchronous trigger signal adopts an optical signal or an electrical signal.