An arc suppression coil digital simulation system and simulation method

Abstract

This invention discloses a digital simulation system and method for arc suppression coils. The digital simulation system includes an arc suppression coil digital simulation device and a host computer. The host computer communicates with the arc suppression coil digital simulation device via a USB interface, and the arc suppression coil digital simulation device communicates with the arc suppression controller under test via a serial port. The arc suppression controller under test also communicates with the host computer via a serial port. This invention uses a single digital simulation system to simulate a target arc suppression coil test system, allowing for convenient and on-site testing of the arc suppression controller under test. This improves test safety and eliminates the need for complex and bulky arc suppression coil bodies or tooling, providing arc suppression coil manufacturers with a convenient and safe testing method to verify the various functions of the arc suppression controller.

Description

Technical Field

[0001] This invention relates to the field of power grid equipment testing technology in power systems, and in particular to a digital simulation method and apparatus for arc suppression coils. Background Technology

[0002] In recent years, neutral point arc suppression coil compensation complete sets of equipment have been widely used in the market. As the core control equipment of the arc suppression coil compensation complete set of equipment, the function and performance of the arc suppression controller have an important impact on the operational stability and reliability of the arc suppression coil. Therefore, periodic maintenance of the arc suppression controller is very necessary.

[0003] Arc suppression controllers are used in arc suppression coil systems to control the switching and regulation of arc suppression coils when a ground fault occurs in the power grid, based on the system's operating status. Their main functions are: ： When the system is running normally, it collects information such as analog quantities and status quantities of the system, calculates the system's capacitive current, and controls the arc suppression coil to operate at a reasonable compensation level. When a ground fault occurs in the system, the arc suppression controller locks the arc suppression coil adjustment, stabilizes the output compensation current, and reduces the grounding point current. After the system ground fault disappears, it recalculates the system's capacitive current and operates at a reasonable compensation level.

[0004] Currently, testing the overall function of the arc suppression controller requires a laboratory setting, relying on bulky and complex arc suppression coil bodies or fixtures, on-load switch bodies or fixtures, and other auxiliary devices such as microcomputer relay protection testing systems. This results in a complex testing environment setup, low testing efficiency, and inconvenience in portability.

[0005] For the functional acceptance testing of arc suppression controllers already installed in substations, only a microprocessor-based relay protection testing system can be used to test the basic functions of the arc suppression controller. Currently, there are no effective on-site testing methods for functions such as automatic tracking and current capacity calculation of the arc suppression controller. Furthermore, there are no effective means to reproduce abnormal situations that occur during the operation of the arc suppression controller in the field. Therefore, for arc suppression controllers installed in the field, they can only be removed and taken back to the manufacturer's laboratory for testing, making it difficult to meet the needs for periodic on-site maintenance and fault recovery. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a digital simulation method and device for arc suppression coils, which can simulate the target arc suppression coil system, facilitate and efficiently conduct comprehensive testing of the automatic tracking function of the arc suppression controller, solve the inspection problem of arc suppression controllers during the production process, and solve the problems of difficult functional acceptance and difficulty in reproducing abnormal working conditions when the arc suppression controller is installed on-site in substations.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows.

[0008] A digital simulation system for arc suppression coils is provided for simulating a target arc suppression coil system to perform functional testing on an arc suppression controller under test. The system includes a digital simulation device for simulating the target arc suppression coil system and a host computer for generating control commands based on the operating status of the target arc suppression coil system to perform functional testing on the arc suppression controller under test. The digital simulation device communicates with the host computer via a USB interface, and the arc suppression controller under test communicates with the digital simulation device via a serial port.

[0009] The aforementioned digital simulation system for arc suppression coils includes a chassis and a motherboard, power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board plugged into the chassis. The power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board are respectively plugged into the corresponding ports on the motherboard. The host computer's USB interface is connected to the motherboard of the digital simulation system for arc suppression coils. The power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board of the digital simulation system for arc suppression coils are respectively connected to the arc suppression controller under test.

[0010] A digital simulation method for an arc suppression coil, comprising using the digital simulation system for an arc suppression coil as described in claim 1 or 2 to test the automatic tracking function of the arc suppression controller under test; the simulation method specifically includes the following steps:

[0011] A. Select the digital simulation method for the arc suppression coil in the host computer;

[0012] B. The host computer sends control commands to the digital simulation device of the arc suppression coil according to the operating status of the target arc suppression coil system; the digital simulation device of the arc suppression coil outputs input and output quantities and analog quantity information to the arc suppression controller under test according to the control commands; the arc suppression controller under test performs various function tests in sequence according to the received information and sends the test results back to the host computer.

[0013] C. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, and generates an analysis report.

[0014] The above-mentioned digital simulation method for arc suppression coils, in step A, is either a simulation model method or a waveform playback method.

[0015] The above-mentioned digital simulation method for arc suppression coils specifically includes the following steps:

[0016] A1. Select the digital simulation method for the arc suppression coil in the host computer simulation model;

[0017] B11. Based on the operating status of the target arc suppression coil system, set the key operating parameters of the target arc suppression coil system in the host computer, and construct a target test model corresponding to the target arc suppression coil system;

[0018] B12. Calculate the effective values ​​of voltage and current and phase relationship under the current gear; and send control commands to the digital simulation device of the arc suppression coil through the target test model;

[0019] B13. The arc suppression coil digital analog device executes the output of input and output quantities and analog quantity information according to the control command, and executes the corresponding action command;

[0020] B14. The arc suppression controller under test performs various function tests based on the received information and sends the test results back to the host computer;

[0021] C1. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, and generates an analysis report.

[0022] The key parameters mentioned in step B1 of the above-mentioned digital simulation method for arc suppression coils include reactance at each range, system capacitance, current range, arc suppression tail resistance, system unbalanced voltage, and bus voltage.

[0023] The above-mentioned digital simulation method for arc suppression coils specifically includes the following steps:

[0024] A2. Select the waveform playback digital simulation method for the arc suppression coil in the host computer. The host computer stores waveform diagrams for each gear in the target arc suppression coil system.

[0025] B21. The host computer acquires the waveform recording of the target arc suppression coil system during actual operation, opens and edits the waveform recording of the system during actual operation, adjusts the channel order and sampling rate configuration information, and saves it to the computer;

[0026] B22. After the digital simulation device for the arc suppression coil recognizes the adjustment signal sent by the arc suppression controller under test, it transmits the adjustment input signal to the host computer through the USB interface.

[0027] B23. After receiving the gear shift input signal, the host computer updates the simulated gear status according to the current simulated gear status.

[0028] B24. The host computer sends the gear shifting command to the arc suppression coil digital simulation device according to the updated simulated gear status. The arc suppression coil digital simulation device performs the gear shifting operation according to the gear shifting command.

[0029] B25. The host computer automatically finds the waveform corresponding to the updated analog gear status and saves it in the computer. It opens the waveform and transmits the digital quantities corresponding to each channel in the waveform to the arc suppression coil digital analog device through the USB interface.

[0030] B26. The arc suppression coil digital analog device converts the digital quantity sent by the host computer into an analog quantity; the voltage analog output board and the current analog output board of the arc suppression coil digital analog device output the corresponding analog quantity information to the arc suppression controller under test respectively;

[0031] B27. The digital simulation device of the arc suppression coil re-identifies the adjustment signal sent by the arc suppression controller under test, and repeats steps B21-B27.

[0032] B28. After the arc suppression controller under test completes the automatic tracking and current calculation function test in steps B21-27, it performs other function tests according to the received information sequence and sends the test results back to the host computer.

[0033] C. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, and generates an analysis report.

[0034] Due to the adoption of the above technical solutions, the technical progress achieved by this invention is as follows.

[0035] This invention uses a digital simulation system to simulate the target arc suppression coil test system, enabling convenient and on-site testing of the arc suppression controller under test. The simulation device is lightweight, portable, easy and simple to wire, and is a low-voltage device, improving test safety. It eliminates the need for complex and bulky arc suppression coil bodies or tooling, providing arc suppression coil manufacturers with a convenient and safe testing method to verify the various functions of the arc suppression controller. This solves the testing difficulties faced by arc suppression controller manufacturers during production, and addresses the challenges of functional acceptance and the difficulty in reproducing abnormal operating conditions during on-site installation of arc suppression controllers in substations.

[0036] After the arc suppression coil simulation system of this invention is connected to the arc suppression controller under test, it can transform the complex simulation information of the arc suppression coil into quantifiable data without the need to connect any other physical devices related to the arc suppression coil. Then, an appropriate mathematical model is established based on this data, and the data is processed uniformly by the host computer software. The arc suppression coil digital simulation device detects the input signals and outputs relevant signals to realize the digital simulation of the target arc suppression coil. Furthermore, it automatically and sequentially completes the testing of all functions of the arc suppression controller and automatically generates an analysis report, which greatly improves the efficiency of the arc suppression controller's functional testing. Attached Figure Description

[0037] Figure 1This is a schematic diagram of the target test model described in this invention;

[0038] Figure 2 This is a schematic diagram showing the structure of the digital simulation system for the arc suppression coil described in this invention and its connection with the arc suppression controller of the object under test;

[0039] Figure 3 This is a diagram showing the board layout of the digital simulation device for arc suppression coils described in this invention.

[0040] Figure 4 This is an electrical principle block diagram of the arc suppression coil digital simulation device described in this invention;

[0041] Figure 5 This is a flowchart of the digital simulation method for arc suppression coils described in this invention. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0043] A digital simulation system for arc suppression coils is provided to simulate the target arc suppression coil system and perform functional testing on the arc suppression controller under test. Its structure is as follows: Figure 2 As shown, it includes a digital simulation device for arc suppression coils and a host computer. The digital simulation device for arc suppression coils is used to simulate the target arc suppression coil system. The host computer is equipped with computer software, which is used to generate control commands based on the operating status of the target arc suppression coil system to perform functional testing on the arc suppression controller under test.

[0044] The connection relationship between the digital simulation system of the arc suppression coil and the arc suppression controller under test is as follows: Figure 2 As shown, specifically: the host computer is connected to the arc suppression coil digital simulation device via a USB interface, the arc suppression coil digital simulation device and the host computer communicate data via a USB interface, and the arc suppression coil digital simulation device and the arc suppression controller under test are connected one-to-one via data and communication interfaces.

[0045] The host computer described in this invention is a computer with host computer software installed on it; when in use, the host computer software can be directly installed on the on-site computer.

[0046] The arc coil digital analog device of this invention includes a chassis and a motherboard, power board, main control board, main control daughterboard, voltage analog output board, current analog output board, output board, and input board plugged into the chassis, such as... Figure 3 As shown; the positional relationship between the various panels is as follows: Figure 4As shown, specifically: the power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board are respectively plugged into the corresponding ports of the motherboard. The host computer's USB interface is connected to the motherboard of the arc suppression coil digital analog device. The power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board of the arc suppression coil digital device are respectively connected to the arc suppression controller under test.

[0047] Whether applied to factory testing of arc suppression controllers by manufacturers or to on-site testing or fault reproduction of arc suppression controllers, this invention only requires carrying the arc coil digital simulation device and host computer software. The software is installed on-site, and the computer, arc coil digital simulation device, and arc suppression controller under test are connected via a dedicated data cable to conduct the test, which is very convenient.

[0048] Based on the above-mentioned digital simulation system for arc suppression coils, this invention proposes a digital simulation method for arc suppression coils, which is used to detect the automatic tracking function of the arc suppression controller under test.

[0049] The simulation method flow is as follows: Figure 5 As shown, the specific steps include:

[0050] A. Select the digital simulation method for the arc suppression coil in the host computer; in this step, the digital simulation method for the arc suppression coil is either the simulation model method or the waveform playback method.

[0051] B. The host computer sends control commands to the digital simulation device of the arc suppression coil according to the operating status of the target arc suppression coil system; the digital simulation device of the arc suppression coil outputs input and output quantities and analog quantity information to the arc suppression controller under test according to the control commands; the arc suppression controller under test performs various function tests in sequence according to the received information and sends the test results back to the host computer.

[0052] C. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, and generates an analysis report.

[0053] Example 1

[0054] This embodiment proposes a digital simulation method for arc suppression coils, which is based on a simulation model and includes the following steps.

[0055] A1. Select the digital simulation method of the arc suppression coil simulation model through the host computer software.

[0056] B11. Based on the operating status of the target arc suppression coil system, set the key operating parameters of the target arc suppression coil system in the host computer. These key parameters include the reactance at each speed setting, system capacitance, current speed setting, arc suppression tail resistance, system unbalanced voltage, and bus voltage. Construct a target test model corresponding to the target arc suppression coil system; such as... Figure 1 As shown.

[0057] B12. Calculate the effective values ​​of voltage and current and phase relationship under the current gear position; and send control commands to the digital simulation device of the arc suppression coil through the target test model.

[0058] B13. The arc suppression coil digital analog device executes the output of input and output quantities and analog quantity information according to the control instructions, and executes the corresponding action instructions.

[0059] B14. The arc suppression controller under test performs various function tests based on the received information and sends the test results back to the host computer.

[0060] C1. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, determines whether the automatic tracking function of the arc suppression controller is normal, and generates an analysis report.

[0061] Example 2

[0062] This embodiment proposes a digital simulation method for arc suppression coils, which is based on the waveform playback method and specifically includes the following steps.

[0063] A2. Select the waveform playback digital simulation method for the arc suppression coil in the host computer. The host computer stores waveform diagrams for each gear in the target arc suppression coil system.

[0064] B21. The host computer acquires the waveform recording of the target arc suppression coil system during actual operation, opens and edits the waveform recording of the system during actual operation, adjusts the channel order and sampling rate configuration information, and saves it to the computer.

[0065] Since the recorded waveform may be obtained from any recording device, the channel order and sampling rate of the waveform are inconsistent with those of the analog device, so it cannot be output directly. It needs to be edited by the host computer before it can be output.

[0066] B22. After the digital simulation device for the arc suppression coil recognizes the adjustment signal issued by the arc suppression controller under test, it transmits the adjustment input signal to the host computer through the USB interface.

[0067] B23. After receiving the gear shift input signal, the host computer updates the simulated gear status according to the current simulated gear status.

[0068] The host computer receives the gear adjustment signal, identifies whether it is an upshift or downshift. If it is an upshift, it increments the current analog output gear by 1; if it is a downshift, it decrements the current analog output gear by 1. Then, it transmits the updated analog output gear to the arc suppression controller under test.

[0069] B24. The host computer sends the gear shifting command to the arc suppression coil digital simulation device based on the updated simulated gear status. The arc suppression coil digital simulation device performs the gear shifting operation according to the gear shifting command.

[0070] B25. The host computer automatically finds the waveform corresponding to the updated analog gear status and saves it in the computer. It opens the waveform and transmits the digital quantities corresponding to each channel in the waveform to the arc suppression coil digital analog device through the USB interface.

[0071] B26. The arc suppression coil digital simulation device converts the digital quantity sent by the host computer into an analog quantity; the voltage analog output board and the current analog output board of the arc suppression coil digital simulation device output the corresponding analog quantity information to the arc suppression controller under test.

[0072] B27. The digital simulation device for the arc suppression coil re-identifies the adjustment signal issued by the arc suppression controller under test, and repeats steps B21-B27.

[0073] Once the arc suppression controller under test reaches a stable state and no longer issues adjustment signals, the digital analog device of the arc suppression coil stably outputs the analog and digital quantities of the current state.

[0074] B28. After the arc suppression controller under test completes the automatic tracking and current calculation function tests in steps B21-27, it performs other function tests in sequence according to the received information and sends the test results back to the host computer.

[0075] C. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, determines whether the automatic tracking and current calculation functions of the arc suppression controller are normal, and generates an analysis report.

[0076] The waveform playback method and simulation model method described above are only for testing the automatic tracking function of the arc suppression controller under test. Other functions of the arc suppression controller that need to be tested include analog quantity detection, input quantity detection, output quantity detection, communication function with the backend, and line selection function detection. These are the basic functions of the controller and require separate functional modules to be built in the host computer for testing.

[0077] The focus of this invention is to simulate the arc suppression coil test environment by combining analog quantities and input / output quantities, so as to realize the detection of the core function of the arc suppression controller by automatically tracking.

Claims

1. A digital simulation method for arc suppression coils based on a digital simulation system for arc suppression coils, comprising a digital simulation system for arc suppression coils used to simulate a target arc suppression coil system to perform functional testing on the arc suppression controller under test; characterized in that: The arc suppression coil digital simulation system includes an arc suppression coil digital simulation device for simulating a target arc suppression coil system and a host computer for generating control commands based on the operating status of the target arc suppression coil system to perform functional testing on the arc suppression controller under test. The arc suppression coil digital simulation device and the host computer communicate via a USB interface, and the arc suppression controller under test communicates with the arc suppression coil digital simulation device via a serial port. The arc suppression coil digital simulation method uses an arc suppression coil digital simulation system to test the automatic tracking function of the arc suppression controller under test; the simulation method specifically includes the following steps: A. Select the digital simulation method for the arc suppression coil in the host computer; B. The host computer sends control commands to the digital simulation device of the arc suppression coil according to the operating status of the target arc suppression coil system; the digital simulation device of the arc suppression coil outputs input and output quantities and analog quantity information to the arc suppression controller under test according to the control commands; the arc suppression controller under test performs various function tests in sequence according to the received information and sends the test results back to the host computer. C. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, and generates an analysis report; The digital simulation method for the arc suppression coil described in step A is the waveform playback method; the digital simulation method for the arc suppression coil is based on the waveform playback method and specifically includes the following steps: A2. Select the waveform playback digital simulation method for the arc suppression coil in the host computer. The host computer stores waveform diagrams for each gear in the target arc suppression coil system. B21. The host computer acquires the waveform recording of the target arc suppression coil system during actual operation, opens and edits the waveform recording of the system during actual operation, adjusts the channel order and sampling rate configuration information, and saves it to the computer; B22. After the digital simulation device for the arc suppression coil recognizes the adjustment signal sent by the arc suppression controller under test, it transmits the adjustment input signal to the host computer through the USB interface. B23. After receiving the gear shift input signal, the host computer updates the simulated gear status according to the current simulated gear status. B24. The host computer sends the gear shifting command to the arc suppression coil digital simulation device according to the updated simulated gear status. The arc suppression coil digital simulation device performs the gear shifting operation according to the gear shifting command. B25. The host computer automatically finds the waveform corresponding to the updated analog gear status and saves it in the computer. It opens the waveform and transmits the digital quantities corresponding to each channel in the waveform to the arc suppression coil digital analog device through the USB interface. B26. The arc suppression coil digital analog device converts the digital quantity sent by the host computer into an analog quantity; the voltage analog output board and the current analog output board of the arc suppression coil digital analog device output the corresponding analog quantity information to the arc suppression controller under test respectively; B27. The digital simulation device of the arc suppression coil re-identifies the adjustment signal sent by the arc suppression controller under test, and repeats steps B21-B27. B28. After the arc suppression controller under test completes the automatic tracking and current calculation function test in steps B21-27, it performs other function tests according to the received information sequence and sends the test results back to the host computer. C2. The host computer compares the received feedback information with the theoretical value, judges the performance of the tested arc suppression controller, and generates an analysis report.

2. The arc suppression coil digital simulation method based on an arc suppression coil digital simulation system according to claim 1, characterized in that: The arc suppression coil digital simulation device includes a chassis and a motherboard, power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board plugged into the chassis. The power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board are respectively plugged into the corresponding ports of the motherboard. The host computer USB interface is connected to the motherboard of the arc suppression coil digital simulation device. The power board, main control board, main control sub-board, voltage analog output board, current analog output board, output board, and input board of the arc suppression coil digital device are respectively connected to the arc suppression controller under test.

Images