VFTO sensor simulation system and method based on ATP model

Abstract

The invention discloses a VFTO sensor simulation system and method based on an ATP model, and belongs to the technical field of very fast transient overvoltage measurement. The invention provides a simulation system which comprises a model creation module, a parameter setting module, a simulation operation module, an analysis module, a verification module and an optimization module, and aims at solving the problem of lightning overvoltage and VFTO monitoring in a high-voltage-class hydropower station switching station. The system creates a power system and sensor model through an ATP graph or text editor, sets simulation parameters to simulate a VFTO scene, operates simulation to collect sensor output data, analyzes waveform accuracy and sensor performance, and optimizes the sensor and the model based on a result. According to the method, simulation is rapid, monitoring is accurate, the integrity and reliability of VFTO data are effectively improved, and powerful support is provided for power grid optimization; flexible configuration of multiple scenes and multiple parameters is supported, specific requirements of different voltage grades and hydropower stations are met, and scientific basis and technical guarantee are provided for safe and stable operation of a power system.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-fast transient overvoltage measurement, and in particular to a VFTO sensor simulation system and method based on an ATP model. Background Art

[0002] As the global power system continues to evolve towards high voltage and large capacity, the voltage level and capacity of hydropower station switch stations continue to increase, and insulation material technology faces increasingly severe challenges. Especially in high-voltage hydropower station switch stations, lightning overvoltage and very fast transient overvoltage (VFTO) have become key issues affecting system safety and reliability. VFTO, with its significant characteristics such as high voltage amplitude, large wavefront steepness, short rise time, and wide oscillation frequency range, poses a huge threat to the insulation level of power equipment.

[0003] Traditional overvoltage monitoring methods mainly rely on electromagnetic transient simulation technology, which uses simulation calculations to predict overvoltage and overcurrent conditions that may occur after a fault or operation. However, due to the rapid changes, high oscillation frequency, and short duration of electromagnetic transient processes, these methods have significant limitations in real-time monitoring and accurate capture of VFTO. Specifically, it is difficult for traditional methods to maintain stable monitoring accuracy under high-frequency signals, resulting in inaccurate and incomplete monitoring data.

[0004] In addition, existing sensor technologies often have difficulty meeting the high-frequency response requirements of VFTO. Traditional sensor designs may not be able to effectively match the wave impedance of VFTO signals, thus affecting the accuracy and integrity of signal acquisition. This further exacerbates the difficulty of VFTO monitoring and limits the safe operation of power systems under high voltage and large capacity conditions.

[0005] In summary, in order to improve the accuracy and real-time performance of VFTO monitoring, a new type of simulation technology is urgently needed to accurately collect VFTO overvoltage signals without affecting the acquisition of partial discharge. This technology needs to have high-frequency response capability and good wave impedance matching design to ensure the accuracy and integrity of monitoring data. Therefore, the development of an efficient and accurate VFTO sensor simulation system and method is of great significance to improving the operation safety and reliability of power systems under high voltage and large capacity conditions. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a VFTO sensor simulation system and method based on the ATP (Asymmetric Transport Protocol) model to solve the problem that the traditional overvoltage monitoring method relies on electromagnetic transient simulation, but has limitations in real-time monitoring and accurate capture of VFTO, and the existing sensor technology may not meet the requirements of VFTO high-frequency response, resulting in inaccurate and incomplete monitoring data.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a VFTO sensor simulation system based on the ATP model, including a model creation module, a parameter setting module, a simulation operation module, an analysis module and a verification and optimization module connected in sequence, the model creation module is used to create model content and output it to the parameter setting module, the parameter setting module receives the model content, performs simulation parameter setting including breaking operation and outputs it to the simulation operation module, the simulation operation module receives the set parameters, performs simulation and outputs the simulation results to the analysis module, the analysis module receives the simulation results, performs data analysis and outputs the evaluation results to the verification and optimization module, and the verification and optimization module verifies the accuracy of the simulation results according to the evaluation results and optimizes the simulation system.

[0008] In a preferred solution, the model creation module generation method includes an ATP graphic editing unit and a text editing unit to build a model of the power system and the sensor.

[0009] In a preferred solution, the model creation module includes transformers, circuit breakers, lightning arresters and VFTO events.

[0010] In a preferred solution, the parameter setting module is provided with a disconnection operation unit for simulating the scenario of generating VFTO and setting the connection mode and specific parameters of the sensor.

[0011] In a preferred solution, the simulation operation module obtains the sensor output data under the VFTO event by running the ATP simulation.

[0012] In a preferred embodiment, the analysis module receives sensor output data, analyzes and evaluates the capture of the VFTO waveform, waveform accuracy and sensor performance.

[0013] In a preferred solution, the verification and optimization module receives the evaluation results of the analysis module and sets an adjustment unit, including adjusting the sensor design and adjusting the ATP model, to verify and optimize the accuracy of the simulation results.

[0014] In a preferred solution, the adjustment unit further optimizes the accuracy and practicality of the simulation system by comparing experimental data or actual application data.

[0015] The simulation method of the VFTO sensor simulation system based on the ATP model adopts any one of the VFTO sensor simulation systems based on the ATP model described above, and the simulation method comprises the following steps: Step 1: Establish ATP model. Use ATP graphical interface or text editor to establish the model of power system and sensor. Step 2: Set simulation parameters, set the breaking operation under various operating conditions in the ATP graphical interface, simulate the VFTO scenario, and integrate the sensor model into the power system model; Step 3: Run the simulation, run the ATP graphical interface simulation, and collect the output of the sensor under the VFTO event; Step 4, result data analysis, analyze the sensor output data, check whether the VFTO waveform can be successfully captured, and evaluate the accuracy of the waveform and sensor performance; Step 5: Verification and optimization: adjust the sensor design and ATP model according to the simulation results, and verify the accuracy of the ATP simulation results through experiments or actual application data.

[0016] In a preferred embodiment, at least one program is used to execute the simulation method, and the at least one program is loaded and executed by a processor and stored in a computer-readable storage medium.

[0017] The VFTO sensor simulation system and simulation method based on the ATP model provided by the present invention have the following beneficial effects: 1. The present invention solves the problem that the traditional overvoltage monitoring method has limitations in real-time monitoring and accurate capture of VFTO, and cannot meet the accuracy and real-time requirements of VFTO monitoring in high-voltage hydropower station switch stations, and the existing sensor technology cannot meet the requirements of VFTO high-frequency response, resulting in inaccurate and incomplete monitoring data; 2. The simulation system architecture of the present invention is integrated, through modular design, into one system, including model creation, parameter setting, simulation operation, result analysis, and verification optimization, thus improving simulation efficiency and accuracy; 3. The high-frequency response capability of the present invention is optimized. According to the characteristics of VFTO high-frequency signals, the sensor is optimized and designed to ensure that the system can respond quickly to VFTO events and provide more complete and reliable VFTO data; 4. The simulation parameters of the present invention can be flexibly set. The parameter setting module allows the user to set the breaking operation according to different operating conditions, simulate the scenario of VFTO, and improve the flexibility and practicality of the simulation; 5. The closed-loop feedback of result verification and optimization of the present invention realizes the evaluation and adjustment of simulation results through verification and optimization modules, forming a closed-loop feedback mechanism, which helps to continuously improve the performance of the simulation system.

[0018] 6. The VFTO sensor simulation system of the present invention can more accurately capture the VFTO waveform, evaluate the sensor performance, and improve the accuracy of monitoring data; 7. The system of the present invention can quickly respond to VFTO events, provide timely monitoring data, enhance the real-time performance of the system, and provide strong support for the safe operation of the power grid; 8. The complete VFTO data of the present invention provides an important basis for data analysis and power grid optimization, which helps to improve the overall performance and reliability of the power grid; 9. The invention not only solves the shortcomings of the prior art, but also promotes the further development of VFTO monitoring technology; 10. The present invention sets a new benchmark for VFTO monitoring technology through the innovation of modularization, high-frequency response and closed-loop feedback mechanism, greatly promotes the precise control and prevention of very fast transient overvoltage (VFTO) in the power industry, and helps the construction of smart grids to reach new heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples: Figure 1 It is a schematic diagram of the structural connection of the present invention; Figure 2 It is a schematic diagram of the test model structure of the present invention; In the figure: model creation module 1, parameter setting module 2, simulation operation module 3, analysis module 4, verification and optimization module 5, oscilloscope 6, low-voltage arm capacitor 7, charging circuit 8, SF6 discharge gap 9. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments: Example 1 like Figure 1As shown, the VFTO sensor simulation system based on the ATP model includes a model creation module 1, a parameter setting module 2, a simulation operation module 3, an analysis module 4 and a verification and optimization module 5 which are connected in sequence. The model creation module 1 is used to create model content and output it to the parameter setting module 2. The parameter setting module 2 receives the model content, sets simulation parameters including breaking operations and outputs them to the simulation operation module 3. The simulation operation module 3 receives the set parameters, performs simulation and outputs the simulation results to the analysis module 4. The analysis module 4 receives the simulation results, performs data analysis and outputs the evaluation results to the verification and optimization module 5. The verification and optimization module 5 verifies the accuracy of the simulation results according to the evaluation results and optimizes the simulation system.

[0021] In this embodiment, the model creation module 1 generation mode includes an ATP graphic editing unit and a text editing unit to construct a model of the power system and the sensor.

[0022] Furthermore, the model creation module 1 includes transformers, circuit breakers, lightning arresters and VFTO events.

[0023] Furthermore, the parameter setting module 2 is provided with a disconnection operation unit for simulating the scenario of generating VFTO and setting the connection mode and specific parameters of the sensor.

[0024] Furthermore, the simulation operation module 3 obtains the sensor output data under the VFTO event by running the ATP simulation.

[0025] Furthermore, the analysis module 4 receives the sensor output data, analyzes and evaluates the capture of the VFTO waveform, the waveform accuracy and the sensor performance.

[0026] Furthermore, the verification and optimization module 5 receives the evaluation result of the analysis module 4 and sets an adjustment unit, including adjusting the sensor design and adjusting the ATP model, to verify and optimize the accuracy of the simulation result.

[0027] Furthermore, the adjustment unit further optimizes the accuracy and practicality of the simulation system by comparing experimental data or actual application data.

[0028] Example 2 In another preferred embodiment, based on the above embodiment 1, Figure 1 As shown, the simulation method of the VFTO sensor simulation system based on the ATP model adopts any one of the VFTO sensor simulation systems based on the ATP model described above, and the simulation method comprises the following steps: Step 1: Establish ATP model. Use ATP graphical interface or text editor to establish the model of power system and sensor. Step 2: Set simulation parameters, set the breaking operation under various operating conditions in the ATP graphical interface, simulate the VFTO scenario, and integrate the sensor model into the power system model; Step 3: Run the simulation, run the ATP graphical interface simulation, and collect the output of the sensor under the VFTO event; Step 4, result data analysis, analyze the sensor output data, check whether the VFTO waveform can be successfully captured, and evaluate the accuracy of the waveform and sensor performance; Step 5: Verification and optimization: adjust the sensor design and ATP model according to the simulation results, and verify the accuracy of the ATP simulation results through experiments or actual application data.

[0029] In this embodiment, at least one program is used to execute the simulation method. The at least one program is loaded and executed by a processor and stored in a computer-readable storage medium.

[0030] Example 3 In another preferred embodiment, based on the above-mentioned embodiment 1, a VFTO sensor simulation system based on the ATP model includes a model creation module 1, a parameter setting module 2, a simulation operation module 3, an analysis module 4 and a verification and optimization module 5 which are connected in sequence.

[0031] 1. Model creation module 1 Model creation module 1 is the starting point of the system and is responsible for creating models including transformers, circuit breakers, lightning arresters and VFTO events. This module uses two editing methods: ATP graphic editing unit and text editing unit. Users can choose the appropriate editing method according to actual needs. For example, use ATP's graphical interface (such as ATPDraw) to intuitively build models of power systems and sensors, or accurately input model parameters through a text editor.

[0032] 2. Parameter setting module 2 In parameter setting module 2, users simulate the VFTO scenario by setting the breaking operation under various operating conditions; for example, setting the circuit breaker fast reclosing operation in ATP, and setting the sensor connection method and specific parameters. These parameter settings will directly affect the accuracy and reliability of the simulation results.

[0033] 3. Simulation operation module 3 The simulation operation module 3 receives the setting parameters from the parameter setting module 2 and starts the ATP simulation program; this module simulates the VFTO event and obtains the output data of the sensor under the event. These data are the basis for subsequent analysis and optimization.

[0034] 4. Analysis module 4 Analysis module 4 performs a detailed analysis on the sensor output data output by simulation operation module 3 to check whether the VFTO waveform can be successfully captured and to evaluate the accuracy of the waveform and the sensor performance; the analysis results will serve as the input of verification and optimization module 5.

[0035] 5. Verification and optimization module 5 The verification and optimization module 5 receives the evaluation results of the analysis module 4, and verifies and optimizes the simulation results through the adjustment unit; the adjustment unit includes two aspects: adjusting the sensor design and adjusting the ATP model; according to the verification results, the user can optimize the sensor design and the simulation model in a targeted manner to improve the accuracy and practicality of the simulation results.

[0036] Example 4 In another preferred embodiment, based on the above embodiment 2, a simulation method of a VFTO sensor simulation system based on an ATP model comprises the following steps: 1. Establish ATP model Use the ATP graphical interface or text editor to build a model of the power system and sensors; this step is the basis of the simulation process, and the accuracy and completeness of the model will directly affect the results of subsequent simulations.

[0037] 2. Set simulation parameters The breaking operations under various operating conditions are set in the ATP graphical interface to simulate the VFTO scenario. At the same time, the sensor model is integrated into the power system model to ensure that the sensor can accurately respond to VFTO events.

[0038] 3. Run the simulation Run the ATP simulation program to collect the output data of the sensors during the VFTO event; this data will be used for subsequent analysis and evaluation.

[0039] 4. Result data analysis Perform a detailed analysis of the sensor data output from the simulation to check whether the VFTO waveform can be successfully captured and to evaluate the accuracy of the waveform and the sensor performance; this step is key to verifying the validity of the simulation results.

[0040] 5. Verification and optimization Adjust the sensor design and ATP model based on the simulation results; verify the accuracy of the ATP simulation results through experiments or actual application data, and further optimize the simulation system and sensor design.

[0041] Example 5 In another preferred embodiment, based on the above-mentioned embodiment 4, at least one program is used to execute the simulation method, and at least one program is loaded and executed by a processor and stored in a computer-readable storage medium; by applying the storage medium to a computer or other electronic device, the user can conveniently perform VFTO sensor simulation experiments without rewriting the simulation program each time, thereby improving work efficiency and convenience.

[0042] Example 6 In another preferred embodiment, based on the above embodiments 1, 2, 3, 4, and 5, in order to study the high frequency characteristics of the present invention, the following is established: Figure 2 The test model shown is compared with the theoretical waveform and the measured waveform.

[0043] A section of 550kV GIS short busbar is used, and an SF6 discharge gap 9 is set between the inner and outer conductors at one end thereof. The inner conductor is charged with a DC voltage through a charging circuit 8, and the voltage is increased until the SF6 discharge gap 9 breaks down, generating a steep traveling wave, which is reflected back and forth on the short busbar to form an ultra-fast transient. The low-voltage arm capacitor 7 is connected in parallel with the input resistance and input capacitance of the oscilloscope 6 to form a secondary voltage division system, so that the sensor has the ability to respond to high-frequency and low-frequency signals. Finally, the sensor signal is transmitted to the oscilloscope to analyze the collected waveform to verify whether the sensor meets the measurement requirements.

[0044] In the preferred solution, the generation method of the model creation module 1 includes an ATP graphic editing unit and a text editing unit to construct a model of the power system and the sensor; the above settings can flexibly respond to the complex and changeable power system design requirements, and through the combination of an intuitive graphical interface and a detailed text description, ensure the accuracy and efficiency of the model construction, and lay a solid foundation for subsequent simulation analysis.

[0045] In a preferred solution, the model creation module 1 includes a transformer, a circuit breaker, a lightning arrester and a VFTO event; in the above settings, the transformer is used for the conversion and distribution of electric energy, the circuit breaker ensures that the circuit is quickly cut off in the event of a fault, the lightning arrester protects the equipment from damage by overvoltages such as lightning, and the VFTO (fast transient overvoltage) event monitoring function enhances the system's ability to resist transient voltage disturbances.

[0046] In the preferred scheme, the parameter setting module 2 is provided with a breaking operation unit for simulating the scenario of VFTO and setting the connection mode and specific parameters of the sensor; the above settings can ensure the high controllability and accuracy of the experimental environment, and further collect and process the VFTO signal in real time through the data analysis module 4, so as to provide a reliable basis for the safety assessment of the power system; at the same time, the module supports flexible configuration to meet different experimental needs.

[0047] In the preferred solution, the simulation operation module 3 obtains the sensor output data under the VFTO event by running the ATP simulation; the above settings ensure that the simulation environment can accurately simulate the VFTO phenomenon in the actual power system, thereby verifying the performance and reliability of the sensor under extreme electromagnetic transient conditions. The simulation results will be directly used to evaluate the design optimization of the sensor and the adaptive adjustment in subsequent applications.

[0048] In the preferred solution, the analysis module 4 receives the sensor output data, analyzes and evaluates the capture of the VFTO waveform, the waveform accuracy and the sensor performance; the above settings realize automatic calibration and compensation through a high-precision algorithm to ensure the measurement accuracy, and feedback the sensor status to the monitoring platform in real time, so as to quickly respond to abnormalities or maintenance needs and optimize the stable operation of the power grid.

[0049] In a preferred solution, the verification and optimization module 5 receives the evaluation results of the analysis module 4 and sets an adjustment unit, including adjusting the sensor design and adjusting the ATP model, to verify and optimize the accuracy of the simulation results; the above settings are intended to reduce errors through an iterative process to ensure a high degree of consistency between the simulation environment and the real scene; in addition, the module also integrates a feedback mechanism, allowing users to further fine-tune parameters based on performance in actual applications to improve the performance and reliability of the overall system.

[0050] In the preferred solution, the adjustment unit further optimizes the accuracy and practicality of the simulation system by comparing experimental data or actual application data; the above settings ensure that the simulation results are highly close to the real environment and improve the accuracy of decision-making; at the same time, a real-time feedback mechanism is introduced to dynamically adjust parameters according to the operating results to ensure that the system continues to adapt to changing needs.

[0051] In a preferred embodiment, at least one program is used to execute the simulation method, and at least one program is loaded and executed by a processor and stored in a computer-readable storage medium. The above settings ensure the accuracy and efficiency of the simulation process. This storage medium includes but is not limited to hard disks, solid-state drives, USB flash drives, etc., supports fast read and write operations, and provides a solid foundation for the operation of the simulation algorithm.

[0052] In summary, the present invention provides a VFTO sensor simulation system and method based on the ATP model, which solves the problem that the traditional overvoltage monitoring method relies on electromagnetic transient simulation, but has limitations in real-time monitoring and accurate capture of VFTO, and the existing sensor technology may not meet the requirements of VFTO high-frequency response, resulting in inaccurate and incomplete monitoring data; the modular design of the present invention divides the simulation system into multiple independent modules, each module is responsible for a specific function, and improves the flexibility and maintainability of the system; its flexible model creation method supports both ATP graphic editing and text editing to meet the modeling needs of different users; its precise simulation parameter setting, through the setting of the breaking operation unit, can more accurately simulate the scene of VFTO generation, and improve the reliability of the simulation results. reliability; its closed-loop verification and optimization setting, that is, from the collection and analysis of simulation data to verification and optimization, the whole process forms a closed loop, ensuring the accuracy and practicality of the simulation results; the optimization of its high-frequency response capability, through simulation optimization of sensor design, improves its performance in high-frequency signal transmission, and solves the problem of insufficient high-frequency response of existing sensors; the present invention verifies the accuracy of the simulation results in combination with experimental or actual application data, ensuring the effectiveness and reliability of the simulation system in practical applications; in addition, the system also has powerful data analysis and visualization functions, which can intuitively display the VFTO characteristics and their propagation laws, and provide important reference for the safe and stable operation of the power system; at the same time, the system is easy to integrate into the existing power monitoring platform, realizing a comprehensive intelligent upgrade from data acquisition to analysis and processing.

Claims

1. The VFTO sensor simulation system based on the ATP model is characterized by: The system comprises a model creation module (1), a parameter setting module (2), a simulation operation module (3), an analysis module (4) and a verification and optimization module (5) which are connected in sequence. The model creation module (1) is used to create model content and output it to the parameter setting module (2). The parameter setting module (2) receives the model content, performs simulation parameter setting including a breaking operation and outputs it to the simulation operation module (3). The simulation operation module (3) receives the set parameters, performs simulation and outputs the simulation results to the analysis module (4). The analysis module (4) receives the simulation results, performs data analysis and outputs the evaluation results to the verification and optimization module (5). The verification and optimization module (5) verifies the accuracy of the simulation results according to the evaluation results and optimizes the simulation system.

2. The VFTO sensor simulation system based on the ATP model according to claim 1, characterized in that: The model creation module (1) generation method includes an ATP graphic editing unit and a text editing unit to construct a model of the power system and the sensor.

3. The VFTO sensor simulation system based on the ATP model according to claim 2, characterized in that: The model creation module (1) includes transformers, circuit breakers, lightning arresters and VFTO events.

4. The VFTO sensor simulation system based on the ATP model according to claim 3, characterized in that: The parameter setting module (2) is provided with a breaking operation unit, which is used to simulate the scenario of generating VFTO and set the connection mode and specific parameters of the sensor.

5. The VFTO sensor simulation system based on the ATP model according to claim 4, characterized in that: The simulation operation module (3) obtains the sensor output data under the VFTO event by running the ATP simulation.

6. The VFTO sensor simulation system based on the ATP model according to claim 5, characterized in that: The analysis module (4) receives the sensor output data, analyzes and evaluates the capture of the VFTO waveform, the waveform accuracy and the sensor performance.

7. The VFTO sensor simulation system based on the ATP model according to claim 6, characterized in that: The verification and optimization module (5) receives the evaluation result of the analysis module (4) and sets an adjustment unit, including adjusting the sensor design and adjusting the ATP model, so as to verify and optimize the accuracy of the simulation result.

8. The VFTO sensor simulation system based on the ATP model according to claim 7, characterized in that: The adjustment unit further optimizes the accuracy and practicality of the simulation system by comparing experimental data or actual application data.

9. A simulation method for a VFTO sensor simulation system based on an ATP model, characterized in that: The VFTO sensor simulation system based on the ATP model according to any one of claims 1 to 8 is adopted, and the simulation method comprises the following steps: Step 1: Establish ATP model. Use ATP graphical interface or text editor to establish the model of power system and sensor. Step 2: Set simulation parameters, set the breaking operation under various operating conditions in the ATP graphical interface, simulate the VFTO scenario, and integrate the sensor model into the power system model; Step 3: Run the simulation, run the ATP graphical interface simulation, and collect the output of the sensor under the VFTO event; Step 4, result data analysis, analyze the sensor output data, check whether the VFTO waveform can be successfully captured, and evaluate the accuracy of the waveform and sensor performance; Step 5: Verification and optimization: adjust the sensor design and ATP model according to the simulation results, and verify the accuracy of the ATP simulation results through experiments or actual application data.

10. The simulation method of the VFTO sensor simulation system based on the ATP model according to claim 9 is characterized by: At least one program is used to execute the simulation method. The at least one program is loaded and executed by a processor and stored in a computer-readable storage medium.

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