Wave recording acquisition performance test system and method of power distribution terminal

Abstract

The invention discloses a recording acquisition performance test system and method for a power distribution terminal, and the system comprises a test master station which issues a pre-test initial condition to a tested power distribution terminal; issuing a protocol time synchronization command to the tested power distribution terminal so as to calculate a time synchronization error; issuing a test command to the signal generator; determining the wave recording acquisition performance of the tested power distribution terminal based on the reference waveform and the sample waveform; the signal generator outputs a test signal to the tested power distribution terminal according to the test command; the oscillograph is used for recording the test signal waveform output by the signal generator as a reference waveform and uploading the reference waveform to the test master station; and the tested power distribution terminal uploads the collected sample waveform to the test master station. According to the method, parallel testing of recording acquisition performance indexes of multiple sets of power distribution terminals can be supported at the same time, the testing efficiency is improved, high-quality power distribution terminal equipment with excellent performance and high stability can be efficiently screened out according to the testing result, and the reliability and safety of a power distribution network in actual operation are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution terminal oscillographic detection, and more specifically, to an oscillographic acquisition performance test system and method for a distribution terminal. Background Art

[0002] Under the background of the accelerating construction of the intelligent distribution network, the demand for distribution terminals to accurately perceive the operation state of the power grid is becoming more and more urgent, and the oscillographic acquisition function has emerged as the times require. This function can continuously monitor and record the changes in electrical quantities such as current and voltage in the distribution line. Once the power grid encounters faults such as short circuits and overvoltages, it can capture the waveforms at the moment of the fault at an extremely fast speed, which can help power operation and maintenance personnel quickly lock the fault point, accurately analyze the cause of the fault, provide key basis for efficient fault repair, and help optimize the operation mode of the distribution network. Therefore, ensuring the oscillographic acquisition accuracy is of utmost importance. High-precision acquisition can accurately restore the true state of electrical quantities, enable more accurate fault analysis, effectively avoid misjudgment caused by data deviation, and lay a solid foundation for the safe and stable operation of the distribution network.

[0003] In the complex operation environment of the intelligent distribution network, accurately judging the usability of the oscillographic acquisition performance of distribution terminals is crucial for ensuring the reliable operation of the power system. This requires a comprehensive and systematic verification of the sensitivity of the oscillographic startup condition, the scientific nature of the oscillographic generation mechanism, and the accuracy of signal acquisition accuracy.

[0004] Therefore, an oscillographic acquisition performance test system and method for a distribution terminal are needed. Summary of the Invention

[0005] The present invention proposes an oscillographic acquisition performance test system and method for a distribution terminal to solve the problem of how to test the oscillographic acquisition performance of a distribution terminal.

[0006] To solve the above problems, according to one aspect of the present invention, an oscillographic acquisition performance test system for a distribution terminal is provided. The system includes: a test master station, a signal generator, an oscillograph, and at least one distribution terminal to be tested, all of which are connected to the test master station; wherein,

[0007] The test master station is configured to issue initial conditions before the test to the distribution terminal to be tested; issue a protocol time synchronization command to the distribution terminal to be tested for calculating the time synchronization error; issue a test command to the signal generator; and determine the oscillographic acquisition performance of the distribution terminal to be tested based on the reference waveform and the sample waveform;

[0008] The signal generator is configured to output a test signal to the distribution terminal to be tested according to the test command;

[0009] The oscillograph is used to record the waveform of the test signal output by the signal generator as a reference waveform and upload the reference waveform to the test master station;

[0010] The distribution terminal under test is used to upload the sampled waveform collected to the test master station.

[0011] Preferably, the initial conditions include: switch position, oscillograph start condition, and oscillograph start setting value.

[0012] Preferably, the test master station determines the oscillograph acquisition performance of the distribution terminal under test based on the reference waveform and the sampled waveform, including:

[0013] The test master station aligns the reference waveform and the sampled waveform, then extracts the signal characteristic values, and determines the oscillograph acquisition performance of the distribution terminal under test based on the signal characteristic values;

[0014] Among them, the signal characteristic values include: steady-state oscillograph voltage, steady-state oscillograph current, transient oscillograph phase voltage, transient oscillograph zero-sequence voltage, transient oscillograph phase current, and transient oscillograph zero-sequence current.

[0015] Preferably, the system further includes:

[0016] A clock server is used to time the test system, so that the time of the signal generator and the oscillograph is synchronized, and at the same time provides a reference value for calculating the satellite time synchronization error of the distribution terminal under test.

[0017] Preferably, the system further includes:

[0018] A switch is used to communicate and network the test master station, the clock generator, the signal generator, the oscillograph, and the distribution terminal under test.

[0019] According to another aspect of the present invention, a method for testing the oscillograph acquisition performance of a distribution terminal is provided. The method includes:

[0020] The test master station issues the initial conditions before the test to the distribution terminal under test and issues a protocol time synchronization command to the distribution terminal under test to calculate the time synchronization error;

[0021] The test master station issues a test command to the signal generator;

[0022] The signal generator outputs a test signal to the distribution terminal under test according to the test command;

[0023] The oscillograph records the waveform of the test signal output by the signal generator as a reference waveform and uploads the reference waveform to the test master station;

[0024] The measured power distribution terminal uploads the collected sample waveforms to the test master station;

[0025] The test master station determines the waveform recording and acquisition performance of the measured power distribution terminal based on the reference waveform and the sample waveform.

[0026] Preferably, the initial conditions include: switch position, waveform recording start condition, and waveform recording start setting value.

[0027] Preferably, when the test master station determines the waveform recording and acquisition performance of the measured power distribution terminal based on the reference waveform and the sample waveform, it includes:

[0028] The test master station aligns the reference waveform and the sample waveform, then extracts signal characteristic values, and determines the waveform recording and acquisition performance of the measured power distribution terminal based on the signal characteristic values;

[0029] Among them, the signal characteristic values include: steady-state waveform recording voltage, steady-state waveform recording current, transient waveform recording phase voltage, transient waveform recording zero-sequence voltage, transient waveform recording phase current, and transient waveform recording zero-sequence current.

[0030] Preferably, the method further includes:

[0031] Using a clock server for time synchronization, so that the time of the signal generator and the recorder is synchronized, and at the same time providing a reference value for calculating the satellite time synchronization error of the measured power distribution terminal.

[0032] Preferably, the method further includes:

[0033] Using a switch to communicate and network the test master station, the clock generator, the signal generator, the recorder, and the measured power distribution terminal.

[0034] The present invention provides a system and method for testing the waveform recording and acquisition performance of a power distribution terminal, including: a test master station, which issues pre-test initial conditions to the measured power distribution terminal; issues a protocol time synchronization command to the measured power distribution terminal to calculate the time synchronization error; issues a test command to the signal generator; determines the waveform recording and acquisition performance of the measured power distribution terminal based on the reference waveform and the sample waveform; a signal generator, which outputs a test signal to the measured power distribution terminal according to the test command; a recorder, which records the waveform of the test signal output by the signal generator as the reference waveform and uploads the reference waveform to the test master station; the measured power distribution terminal uploads the collected sample waveforms to the test master station. The present invention can simultaneously support the parallel testing of the waveform recording and acquisition performance indicators of multiple sets of power distribution terminals, improving the testing efficiency. According to the test results of the present invention, high-quality power distribution terminal devices with excellent performance and strong stability can be efficiently screened out, ensuring the reliability and safety of the power distribution network in actual operation. Description of the Drawings

[0035] The exemplary embodiments of the present invention can be more fully understood by referring to the following drawings:

[0036] Figure 1 FIG. 4 is a schematic structural diagram of a waveform recording acquisition performance test system 100 for a power distribution terminal according to an embodiment of the present invention;

[0037] Figure 2 FIG. 5 is an architecture diagram of a waveform recording acquisition performance test system for a power distribution terminal according to an embodiment of the present invention;

[0038] Figure 3 FIG. 6 is a flowchart of a waveform recording acquisition performance test method 300 for a power distribution terminal according to an embodiment of the present invention. Detailed Embodiments

[0039] Now, exemplary embodiments of the present invention will be described with reference to the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely, and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the drawings are not intended to limit the present invention. In the drawings, the same units / components are denoted by the same reference numerals.

[0040] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the ordinary meaning understood by those skilled in the art. Additionally, it can be understood that terms defined in a commonly used dictionary should be understood to have a meaning consistent with the context of their relevant fields, and should not be construed as having an idealized or overly formal meaning.

[0041] The present invention provides a test method and system for the waveform recording acquisition performance of a power distribution terminal, which helps to deeply analyze the advantages and disadvantages of the product in waveform recording acquisition, and then optimize the product performance accordingly to promote product iteration and upgrade. At the same time, based on the test results, high-performance and stable high-quality power distribution terminal devices can be efficiently screened to ensure the reliability and safety of the power distribution network during actual operation.

[0042] Figure 1 FIG. 4 is a schematic structural diagram of a waveform recording acquisition performance test system 100 for a power distribution terminal according to an embodiment of the present invention. As Figure 1As shown in the figure, the oscillographic acquisition performance test system for a distribution terminal provided by an embodiment of the present invention can support parallel tests of the oscillographic acquisition performance indicators of multiple sets of distribution terminals simultaneously, improving the test efficiency. Based on the test results of the present invention, high-quality distribution terminal devices with excellent performance and strong stability can be efficiently screened out to ensure the reliability and safety of the distribution network during actual operation. The oscillographic acquisition performance test system 100 for a distribution terminal provided by an embodiment of the present invention includes: a test master station 101, a signal generator 102, an oscillograph 103, and at least one distribution terminal under test 104, all of which are connected to the test master station.

[0043] Preferably, the test master station 101 is configured to issue initial conditions before the test to the distribution terminal under test; issue a protocol time synchronization command to the distribution terminal under test to calculate the time synchronization error; issue a test command to the signal generator; and determine the oscillographic acquisition performance of the distribution terminal under test based on a reference waveform and a sample waveform.

[0044] Preferably, the initial conditions include: switch position, oscillogram start condition, and oscillogram start setting value.

[0045] Preferably, the test master station determines the oscillographic acquisition performance of the distribution terminal under test based on a reference waveform and a sample waveform, including:

[0046] The test master station aligns the reference waveform and the sample waveform, then extracts signal characteristic values, and determines the oscillographic acquisition performance of the distribution terminal under test based on the signal characteristic values;

[0047] Among them, the signal characteristic values include: steady-state oscillographic voltage, steady-state oscillographic current, transient oscillographic phase voltage, transient oscillographic zero-sequence voltage, transient oscillographic phase current, and transient oscillographic zero-sequence current.

[0048] Preferably, the signal generator 102 is configured to output a test signal to the distribution terminal under test according to the test command.

[0049] Preferably, the oscillograph 103 is configured to record the waveform of the test signal output by the signal generator as a reference waveform and upload the reference waveform to the test master station.

[0050] Preferably, the distribution terminal under test 104 is configured to upload the collected sample waveform to the test master station.

[0051] Preferably, the system further includes:

[0052] A clock server for timing the test system to synchronize the time of the signal generator and the oscillograph, and providing a reference value for calculating the satellite time synchronization error of the distribution terminal under test at the same time.

[0053] Preferably, the system further includes:

[0054] A switch for networking the communication among the test master station, the clock generator, the signal generator, the recorder, and the distribution terminal under test.

[0055] Combined with Figure 2 As shown, in the present invention, the test system includes: a test master station, a clock generator, a signal generator, a recorder, a switch, and at least one distribution terminal under test.

[0056] In the present invention, the test master station is used to perform information interactions such as master station protocol time synchronization, recording wave start condition control value input and output, parameter threshold configuration, and file calling on the distribution terminal by using communication protocols such as DL / T 634.5101 and DL / T 634.5104, so as to realize the recording wave performance test of the distribution terminal.

[0057] The clock server is used to time the test system to ensure the time synchronization of the signal generator and the recorder, and at the same time provide a reference value for calculating the satellite time synchronization error of the distribution terminal. The clock server is not an essential component of this patent. First, the protocol time synchronization method can be issued through the test master station to ensure the time synchronization of the distribution terminal. Second, the signal generator can output at the whole second according to the time of the test master station, and ensure the synchronous recording of the recorder through the hard node output method, or the test master station configures the recorder to start recording by threshold triggering.

[0058] The recorder is used to record the waveform of the test signal output by the signal generator as the reference waveform for comparing the recording wave acquisition accuracy of the distribution terminal.

[0059] The signal generator is used to receive the commands of the test master station and output test signals to the distribution terminal under test at the whole second moment to trigger the recording wave start function of the distribution terminal. The output modes include analog quantity steady-state output, state sequence output, and waveform playback output.

[0060] A switch for networking the communication among the test master station, the clock server, the signal generator, the recorder, and the distribution terminal under test.

[0061] During the test, first, connect the power distribution terminal under test to the signal generator, and establish a communication link between the power distribution terminal under test and the test master station. The test master station issues the initial conditions before the test for the power distribution terminal under test, including but not limited to switch positions, oscillogram start conditions, oscillogram start setting values, etc.; second, the test master station issues a protocol time synchronization command, or realizes the time synchronization of the power distribution terminal through satellite time synchronization, and calculates the time synchronization error; third, the test master station controls the signal generator to output a test signal, and receives the standard waveform and sample waveform files uploaded by the oscillograph and the power distribution terminal respectively within a time period range; fourth, the test master station aligns the two groups of waveforms and extracts the signal characteristic values for relative error calculation. The signal characteristic values include steady-state oscillogram voltage, steady-state oscillogram current, transient oscillogram phase voltage, transient oscillogram zero-sequence voltage, transient oscillogram phase current, and transient oscillogram zero-sequence current.

[0062] Based on the original verification of the oscillogram file format of the power distribution terminal, the present invention adds a comprehensive verification of the oscillogram start conditions, generation mechanism, and transient and steady-state signal amplitudes of the oscillogram file, and at the same time supports the parallel testing of the oscillogram acquisition performance indicators of multiple sets of power distribution terminals, improving the testing efficiency.

[0063] In an embodiment of the present invention, taking a substation terminal with a rated voltage of 57.7V and a rated current of 1A as an example, during the test, in accordance with Figure 2 Connect the voltage acquisition interface of the power distribution terminal under test in parallel with the voltage port of the signal generator, and connect the current acquisition interface and the current output port of the signal generator in series in sequence; establish a communication link between the power distribution terminal under test and the test master station. First, the test master station issues that the switch acquisition position of the power distribution terminal under test before the test is in the off position, the zero-sequence voltage mutation start oscillogram is enabled, and the zero-sequence voltage mutation setting value is 6.5V, etc.; then, the test master station issues a protocol time synchronization command, and records the time T0 when the protocol time synchronization command is issued. By controlling the signal generator to output a switch closing remote signal, the test master station views the time T1 when the SOE signal is generated by receiving the switch position change signal of the power distribution terminal, and calculates whether the time synchronization error meets the requirements (|T1 - T0| ≤ 60s); then, the test master station controls the signal generator to output a test signal in the waveform playback output mode, and at the same time controls the oscillograph to start oscillogram recording, and searches and summons the oscillogram files of the oscillograph and the power distribution terminal according to the time period; finally, the test master station aligns the two groups of waveforms, extracts the steady-state oscillogram voltage value, steady-state oscillogram current value, transient oscillogram phase voltage value, transient oscillogram zero-sequence voltage value, transient oscillogram phase current value, and transient oscillogram zero-sequence current value of the oscillograph and the power distribution terminal, and calculates their relative errors.

[0064] Figure 3 It is a flowchart of the oscillogram acquisition performance test method 300 for a power distribution terminal according to an embodiment of the present invention. As Figure 3As shown, the method 300 for testing the wave recording and acquisition performance of a distribution terminal provided by an embodiment of the present invention starts from step 301. In step 301, the test master station issues the initial conditions before the test to the distribution terminal under test, and issues a protocol time synchronization command to the distribution terminal under test to calculate the time synchronization error.

[0065] Preferably, the initial conditions include: switch position, wave recording start condition, and wave recording start setting value.

[0066] In step 302, the test master station issues a test command to the signal generator.

[0067] In step 303, the signal generator outputs a test signal to the distribution terminal under test according to the test command.

[0068] In step 304, the recorder records the waveform of the test signal output by the signal generator as the reference waveform, and uploads the reference waveform to the test master station.

[0069] In step 305, the distribution terminal under test uploads the collected sample waveform to the test master station.

[0070] In step 306, the test master station determines the wave recording and acquisition performance of the distribution terminal under test based on the reference waveform and the sample waveform.

[0071] Preferably, the test master station determines the wave recording and acquisition performance of the distribution terminal under test based on the reference waveform and the sample waveform, including:

[0072] The test master station aligns the reference waveform and the sample waveform, then extracts signal characteristic values, and determines the wave recording and acquisition performance of the distribution terminal under test based on the signal characteristic values;

[0073] Among them, the signal characteristic values include: steady-state wave recording voltage, steady-state wave recording current, transient wave recording phase voltage, transient wave recording zero-sequence voltage, transient wave recording phase current, and transient wave recording zero-sequence current.

[0074] Preferably, the method further includes:

[0075] Using a clock server for time service to synchronize the time of the signal generator and the recorder, and at the same time providing a reference value for calculating the satellite time synchronization error of the distribution terminal under test.

[0076] Preferably, the method further includes:

[0077] Using a switch to communicate and network the test master station, the clock generator, the signal generator, the recorder, and the distribution terminal under test.

[0078] The wave recording acquisition performance testing method 300 of the distribution terminal according to an embodiment of the present invention corresponds to the wave recording acquisition performance testing method 100 of the distribution terminal according to another embodiment of the present invention, and will not be elaborated herein.

[0079] The present invention has been described by referring to a few embodiments. However, as is known to those skilled in the art, other embodiments equivalent to those disclosed above of the present invention equally fall within the scope of the present invention.

[0080] Generally, all terms used in the present invention are interpreted according to their ordinary meanings in the technical field, unless otherwise clearly defined therein. All references to "a / the [device, component, etc.]" are open - interpreted as at least one instance of the device, component, etc., unless otherwise clearly stated. The steps of any method disclosed herein do not necessarily have to be run in the exact order disclosed, unless clearly stated.

[0081] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer - usable storage media (including but not limited to disk memory, CD - ROM, optical memory, etc.) containing computer - usable program code.

[0082] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general - purpose computer, a special - purpose computer, an embedded processor, or other programmable data - processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data - processing devices generate a device for implementing the functions specified in Figure 1 one or more flows and / or Figure 1 blocks or multiple blocks.

[0083] These computer program instructions can also be stored in a computer - readable memory that can direct a computer or other programmable data - processing device to work in a specific manner, such that the instructions stored in the computer - readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one or more flows and / or Figure 1 blocks or multiple blocks.

[0084] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the steps specified in one process or a plurality of processes and / or blocks Figure 1 one process or a plurality of processes and / or blocks Figure 1 steps for the functions specified in one block or a plurality of blocks.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended 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: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A wave recording and acquisition performance test system for a power distribution terminal, characterized in that: The system comprises: a test main station, a signal generator, a recorder and at least one power distribution terminal to be tested, all of which are connected to the test main station; wherein, The test master station is used to send the initial conditions before the test to the tested power distribution terminal; to send the protocol timing command to the tested power distribution terminal to calculate the timing error; to send the test command to the signal generator; to determine the recording and acquisition performance of the tested power distribution terminal based on the reference waveform and the sample waveform; The signal generator is used to output a test signal to the tested power distribution terminal according to the test command; The waveform recorder is used to record the test signal waveform output by the signal generator as a reference waveform, and upload the reference waveform to the test main station; The tested power distribution terminal is used to upload the collected sample waveform to the test main station.

2. The system according to claim 1, characterized in that The initial conditions include: switch position, wave recording start condition and wave recording start constant value.

3. The system according to claim 1, characterized in that The test master station determines the waveform recording and acquisition performance of the tested power distribution terminal based on the reference waveform and the sample waveform, including: The test master station aligns the reference waveform and the sample waveform, extracts signal characteristic values, and determines the waveform recording and acquisition performance of the tested power distribution terminal based on the signal characteristic values; The signal characteristic values ​​include: steady-state waveform voltage, steady-state waveform current, transient waveform phase voltage, transient waveform zero-sequence voltage, transient waveform phase current and transient waveform zero-sequence current.

4. The system according to claim 1, characterized in that The system further comprises: The clock server is used to provide time service to the test system so as to synchronize the time of the signal generator and the recorder, and provide a reference value for the satellite timing error calculation of the tested distribution terminal.

5. The system according to claim 1, characterized in that The system further comprises: The switch is used to network the test master station, clock generator, signal generator, oscilloscope and the tested power distribution terminal for communication.

6. A method for testing the recording and acquisition performance of a power distribution terminal, characterized in that: The method comprises: The test master station sends the initial conditions before the test to the tested power distribution terminal, and sends the protocol timing command to the tested power distribution terminal to calculate the timing error; The test master station sends the test command to the signal generator; The signal generator outputs a test signal to the tested power distribution terminal according to the test command; The recorder records the test signal waveform output by the signal generator as a reference waveform, and uploads the reference waveform to the test main station; The tested power distribution terminal uploads the collected sample waveform to the test master station; The test master station determines the waveform recording and acquisition performance of the tested power distribution terminal based on the reference waveform and the sample waveform.

7. The method according to claim 6, characterized in that The initial conditions include: switch position, wave recording start condition and wave recording start constant.

8. The method according to claim 6, characterized in that The test master station determines the waveform recording and acquisition performance of the tested power distribution terminal based on the reference waveform and the sample waveform, including: The test master station aligns the reference waveform and the sample waveform, extracts signal characteristic values, and determines the waveform recording and acquisition performance of the tested power distribution terminal based on the signal characteristic values; The signal characteristic values ​​include: steady-state waveform voltage, steady-state waveform current, transient waveform phase voltage, transient waveform zero-sequence voltage, transient waveform phase current and transient waveform zero-sequence current.

9. The method according to claim 6, characterized in that The method further comprises: The clock server is used for timing, so that the time of the signal generator and the recorder is synchronized, and at the same time a reference value is provided for the satellite timing error calculation of the tested distribution terminal.

10. The method according to claim 6, characterized in that The method further comprises: The switch is used to network the test master station, clock generator, signal generator, oscilloscope and the tested power distribution terminal.

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