GIS high-voltage isolation switch mechanical state monitoring method

Abstract

The invention provides a method for monitoring the mechanical state of a GIS high-voltage isolation switch. The method comprises the following steps: carrying out a field test in the actual operation environment of GIS equipment, and collecting VFTO data; processing the VFTO data, and establishing an identification model; establishing a GIS equipment isolation switch operation early warning system based on the identification model; and monitoring the mechanical state of the GIS high-voltage isolation switch based on an early warning system. According to the invention, the operation risk possibly caused by mechanical transmission failure and electrical locking failure can be effectively prevented, the accuracy and safety of equipment operation are directly improved, and the risk of equipment failure caused by human factors is reduced. The loss and maintenance cost of the equipment are reduced, the service life of the equipment is prolonged, the stability of the equipment is improved, and therefore the problem that mechanical transmission failure and electrical locking failure of the GIS equipment possibly cause serious equipment misoperation faults is solved.

Description

Technical Field

[0001] The invention relates to the technical field of GIS disconnector monitoring, and in particular to a method for monitoring the mechanical state of a GIS high-voltage disconnector. Background Art

[0002] High-voltage switchgear undertakes the dual tasks of protection and control in the power system, which is related to the safety of the entire power system. GIS (Gas insulated metal enclosed switch) consists of circuit breakers, disconnectors, grounding switches, etc. These devices or components are all enclosed in a metal grounded casing. In the power network, the role of the disconnector is to meet the needs of maintenance and repair work and the change of operation mode. Among them, the open disconnector can observe the operating status of the disconnector by naked eyes, but the disconnector in the GIS equipment is enclosed in an insulating cylinder. Due to its closed and invisible mechanical structure, the on-site operation and maintenance personnel cannot judge the operation inside the GIS disconnector. Therefore, it is usually monitored by obtaining the motor current or contact temperature. However, by monitoring the motor current or contact temperature, only part of the state of the GIS disconnector can be determined, and it is not possible to monitor the full mechanical state of it. At present, there are generally two types of on-site opening and closing of the GIS equipment disconnector. One is the opening and closing indication of the opening and closing indicator installed in the knife switch mechanism box, and the other is the displacement indication of the transmission connecting rod of the knife switch operating mechanism. The remote indication method relies on the position signal of the auxiliary node. When the operating structure fails, or the internal switch conductor driven by the operating structure fails or falls off, both methods will fail to correctly reflect the true position of the internal switch of the GIS equipment, resulting in defects such as inadequate opening and closing of the equipment, and further causing severe discharge, short circuit, explosion and other accidents. This will affect the stability and safety of the entire power system. Therefore, effective monitoring of the mechanical state of the GIS disconnector can effectively avoid the occurrence of the above-mentioned faults and accidents, facilitate inspection and maintenance, and effectively prevent the operational risks that may be caused by mechanical transmission failure and electrical interlock failure, directly improving the accuracy and safety of equipment operation. Summary of the invention

[0003] The purpose of the present invention is to provide a GIS high-voltage disconnector mechanical state monitoring method, aiming to solve the problem that mechanical transmission failure and electrical interlock failure of GIS equipment may lead to serious equipment misoperation failure.

[0004] To achieve the above object, the present invention provides a method for monitoring the mechanical state of a GIS high-voltage disconnector, the method comprising the following steps: S1. Conduct field tests in the actual operating environment of GIS equipment and collect VFTO data; S2. Processing the collected VFTO data and establishing a recognition model; S3. Establish a warning system for GIS equipment isolation switch operation based on the identification model; S4. Monitor the mechanical status of the GIS high-voltage disconnector based on the early warning system.

[0005] The S1 step specifically includes: S11. Prepare GIS equipment and data collection equipment; S12. Perform multiple opening and closing operations on the disconnector of the GIS device to simulate the actual operation scenario, and collect data through the data collection device; S13. Verify the collected data to obtain VFTO data.

[0006] In the step S13, the VFTO data includes the voltage difference of the GIS shell, the voltage difference of the metal ring, the voltage difference of the absolute ground, and the current and voltage parameters when the isolating switch is operated.

[0007] The specific steps of S2 include: S21. Processing and analyzing the collected VFTO data to obtain analysis data; S22. Identify the characteristics of VFTO through data analysis and establish an identification model.

[0008] In the step S21, the analysis data includes frequency, amplitude, time domain and frequency domain analysis of the waveform.

[0009] The step S3 specifically includes: S31. Embedding the recognition model into the early warning system; S32. Use the early warning system to measure the operation of the isolating switch, and compare the collected VFTO data with the model. If it is effective, an early warning system is obtained.

[0010] The specific steps of S4 include: S41. Start the early warning system to monitor the mechanical state of the GIS high-voltage disconnector in real time to obtain monitoring data; S42. Process and analyze the monitoring data to determine whether the operation of the GIS high-voltage disconnector is effective. If it is an abnormal operation or potential failure risk, the early warning mechanism will be triggered.

[0011] The present invention proposes a method for monitoring the mechanical state of a GIS high-voltage disconnector, comprising the following steps: conducting a field test in the actual operating environment of the GIS equipment to collect VFTO data; processing the VFTO data and establishing a recognition model; establishing a GIS equipment disconnector operation early warning system based on the recognition model; and monitoring the mechanical state of the GIS high-voltage disconnector based on the early warning system. The present invention provides a method for monitoring the mechanical state of a GIS high-voltage disconnector, which has the following beneficial effects: The present invention provides a GIS high-voltage disconnector mechanical status monitoring method, which enables equipment operators to more accurately confirm the actual position of the GIS equipment disconnector, and effectively prevent operational risks that may be caused by mechanical transmission failure and electrical interlock failure.

[0012] The GIS high-voltage disconnector mechanical state monitoring method provided by the present invention directly improves the accuracy and safety of equipment operation and reduces the risk of equipment failure caused by human factors. Through accurate operation effectiveness identification and early warning methods, the project results can timely detect operation anomalies and prevent equipment failure risks caused by operation errors.

[0013] The GIS high-voltage disconnector mechanical state monitoring method provided by the present invention not only reduces the loss and maintenance cost of the equipment, but also improves the life and stability of the equipment. The successful application of the technology also makes the operation of the power system more reliable, reduces the probability of power outages, improves the continuity of power supply, and ensures the power demand of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The present invention provides a flow chart of a method for monitoring the mechanical state of a GIS high-voltage disconnector.

[0016] Figure 2 It is a flow chart of collecting VFTO data in field test in the actual operating environment of GIS equipment.

[0017] Figure 3 It is a flow chart for processing the VFTO data and establishing a recognition model.

[0018] Figure 4 It is a flow chart of establishing a GIS equipment isolation switch operation warning system based on the recognition model.

[0019] Figure 5 It is a flow chart for monitoring the mechanical state of the GIS high-voltage disconnector based on the early warning system.

[0020] Figure 6 It is a schematic diagram of a metal ring. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0022] See also Figures 1 to 6 The present invention provides a method for monitoring the mechanical state of a GIS high-voltage disconnector, comprising the following steps: S1. Conduct field tests to collect VFTO data in the actual operating environment of GIS equipment; S11. Prepare GIS equipment and data collection equipment; Specifically, select the test equipment: prepare high-precision data acquisition equipment to capture the instantaneous high-frequency characteristics of VFTO; design the test time, test times, and data acquisition points according to the actual operating environment and operation requirements of the GIS equipment; install a metal ring on the line side of the GIS equipment isolation switch, and use insulating materials to isolate the ring from the GIS shell to measure the induced voltage. Select the voltage difference point between the GIS shell and the metal ring, the voltage difference point between the metal ring and the absolute ground, etc., and connect the measurement point to the data acquisition device with a shielded cable.

[0023] S12. Perform multiple opening and closing operations on the disconnector of the GIS equipment to simulate the actual operation scenario, and collect data through the data collection device; Specifically, when the GIS equipment disconnector is opened or closed, start the data acquisition equipment to record the key parameters of VFTO, such as waveform, frequency, amplitude, etc.; repeat the test many times to ensure that enough data samples are collected to improve the accuracy and reliability of subsequent data analysis; observe the operating status of the GIS equipment during the test and record any abnormal conditions or discharge phenomena.

[0024] S13: Verify the collected data to obtain VFTO data.

[0025] The VFTO data includes the voltage difference of the GIS shell, the voltage difference of the metal ring, the voltage difference of the absolute ground, and the current and voltage parameters when the disconnector is operated. The structure of the metal ring is that the metal ring 1 is connected by two copper half rings with bolts, and a bolt hole 12 is provided on it. Figure 6As shown, the thickness of the metal ring is 2-4 mm, an insulating layer 3 is provided between the metal ring 1 and the GIS shell 2, the thickness of the GIS shell is about 16 mm, and the insulating layer 3 uses insulating cotton or polyethylene film with a thickness of 3-5 mm.

[0026] Specifically, the collected data is preliminarily sorted out to check the completeness and accuracy of the data; abnormal data is eliminated or corrected to ensure the data quality of subsequent analysis; and the sorted data is saved for subsequent processing and analysis.

[0027] S2 processes the VFTO data and establishes a recognition model; S21 processes and analyzes the collected VFTO data to obtain analysis data; The analysis data includes frequency, amplitude, time domain and frequency domain analysis of the waveform.

[0028] Specifically, the collected VFTO data is preprocessed by filtering, denoising and other preprocessing operations to improve data quality. The data is normalized to make the data collected by different batches and different equipment comparable. The key information such as the waveform characteristics, frequency characteristics, amplitude characteristics of VFTO is extracted from the preprocessed data, and the characteristics are further processed and optimized using signal processing technology and machine learning algorithms to improve the accuracy of the recognition model.

[0029] S22 identifies the characteristics of VFTO through data analysis and establishes an identification model.

[0030] Specifically, neural networks and support vector machines are used as the basis of the recognition model. The extracted feature data are used to train the model, and the recognition performance of the model is improved by adjusting the model parameters and optimizing the algorithm. The trained model is verified and tested to ensure that the model can accurately identify the effectiveness of the isolation switch operation of the GIS equipment.

[0031] S3 establishes a warning system for the operation of GIS equipment isolation switches based on the recognition model; S31 embeds the recognition model into the early warning system; Specifically, the recognition model is embedded into the early warning system to ensure that the system can receive VFTO data from GIS equipment in real time.

[0032] S32 uses the early warning system to monitor the operation of the isolating switch, and compares the collected VFTO data with the model. If it is valid, an early warning system is obtained.

[0033] Specifically, the system continuously monitors the operation of the disconnector and compares the collected VFTO data with the model to determine the effectiveness of the operation. When abnormal operation is detected, the system immediately triggers the early warning mechanism and sends early warning information to relevant personnel through sound and light alarms, SMS notifications, email reminders, etc.

[0034] S4 monitors the mechanical state of the GIS high-voltage disconnector based on the early warning system.

[0035] S41 starts the early warning system to monitor the mechanical state of the GIS high-voltage disconnector in real time to obtain monitoring data; Specifically, the early warning system is activated to monitor the mechanical status of the GIS high-voltage disconnector in real time.

[0036] S42 processes and analyzes the monitoring data to determine whether the operation of the GIS high-voltage disconnector is effective. If it is an abnormal operation or a potential failure risk, the early warning mechanism is triggered.

[0037] Specifically, the system collects VFTO data in real time through the data acquisition module, and processes and analyzes the data through the data processing module and the recognition model module; the recognition model determines whether the operation of the GIS high-voltage disconnector is effective based on the processed data; once abnormal operation or potential failure risk is found, the system immediately triggers the early warning mechanism.

[0038] The equipment operators of the present invention can more accurately confirm the actual position of the GIS equipment disconnector, and effectively prevent the operational risks that may be caused by mechanical transmission failure and electrical interlock failure. It directly improves the accuracy and safety of equipment operation and reduces the risk of equipment failure caused by human factors. Through accurate operation effectiveness identification and early warning methods, the project results can timely detect operational abnormalities and prevent the risk of equipment failure caused by operational errors. It not only reduces equipment loss and maintenance costs, but also improves the life and stability of the equipment. The successful application of technology also makes the operation of the power system more reliable, reduces the probability of power outages, improves the continuity of power supply, and ensures the power needs of users. Thereby solving the problem that mechanical transmission failure and electrical interlock failure of GIS equipment may cause serious equipment misoperation failures.

[0039] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for monitoring the mechanical state of a GIS high-voltage disconnector, characterized in that: The method comprises the following steps: S1. Conduct field tests in the actual operating environment of GIS equipment and collect VFTO data; S2. Processing the collected VFTO data and establishing a recognition model; S3. Establish a warning system for GIS equipment isolation switch operation based on the identification model; S4. Monitor the mechanical status of the GIS high-voltage disconnector based on the early warning system.

2. The GIS high-voltage disconnector mechanical state monitoring method according to claim 1 is characterized in that: The S1 step specifically includes: S11. Prepare GIS equipment and data collection equipment; S12. Perform multiple opening and closing operations on the disconnector of the GIS device to simulate the actual operation scenario, and collect data through the data collection device; S13. Verify the collected data to obtain VFTO data.

3. The GIS high-voltage disconnector mechanical state monitoring method according to claim 2 is characterized in that: In the step S13, the VFTO data includes the voltage difference of the GIS shell, the voltage difference of the metal ring, the voltage difference of the absolute ground, and the current and voltage parameters when the isolating switch is operated.

4. The GIS high-voltage disconnector mechanical state monitoring method according to claim 1 is characterized in that: The specific steps of S2 include: S21. Processing and analyzing the collected VFTO data to obtain analysis data; S22. Identify the characteristics of VFTO through data analysis and establish an identification model.

5. The GIS high-voltage disconnector mechanical state monitoring method according to claim 4 is characterized in that: In the step S21, the analysis data includes frequency, amplitude, time domain and frequency domain analysis of the waveform.

6. The GIS high-voltage disconnector mechanical state monitoring method according to claim 1 is characterized in that: The S3 step specifically includes: S31. Embedding the recognition model into the early warning system; S32. Use the early warning system to measure the operation of the isolating switch, and compare the collected VFTO data with the model. If it is effective, an early warning system is obtained.

7. The GIS high-voltage disconnector mechanical state monitoring method according to claim 1 is characterized in that: The specific steps of S4 include: S41. Start the early warning system to monitor the mechanical state of the GIS high-voltage disconnector in real time to obtain monitoring data; S42. Process and analyze the monitoring data to determine whether the operation of the GIS high-voltage disconnector is effective. If it is an abnormal operation or potential failure risk, the early warning mechanism will be triggered.

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