GIS equipment isolation switch transient overvoltage detection system and method

Abstract

The invention relates to a GIS equipment isolation switch transient overvoltage detection system and method, and the system comprises an acquisition module, a processing module, an analysis module, a construction module, an alarm module, and a verification module. The processing module preprocesses the transient overvoltage characteristics and extracts and draws related curve characteristics; the analysis module analyzes voltage and current distribution characteristics and electric field distribution characteristics based on correlation curve characteristics, and the construction module establishes an identification model based on data analysis and machine learning technologies in combination with transient overvoltage characteristics; according to the system, the actual position of the isolation switch of the GIS equipment can be more accurately confirmed, operation risks possibly caused by mechanical transmission failure and electrical locking failure are effectively prevented, and the accuracy and safety of equipment operation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of overvoltage measurement, and in particular to a system and method for detecting transient overvoltage of an isolating switch of a GIS device. Background Art

[0002] GIS (Gas Insulated Switchgear) equipment, namely gas-insulated metal-enclosed switchgear, mainly combines circuit breakers, busbars, current transformers and other equipment in SF6 gas enclosed in a metal casing. It is widely used because of its compactness, reliability and easy maintenance. GIS equipment occupies a key position in the huge and complex power system of the State Grid. However, in GIS equipment, especially during the operation of disconnectors, an overvoltage called Very Fast Transient (VFT) may be generated. This overvoltage is formed when the disconnector cuts the capacitive current due to multiple reignitions of the contact gap, resulting in a sudden drop in voltage, which in turn triggers high-frequency oscillations inside the GIS. When the disconnector is operated, it may cause faults in different parts of the GIS, such as internal spark discharge, bushing damage and even transformer failure. First, it poses a threat to the operational reliability of the GIS itself, and second, it may damage the insulation structure of other high-voltage equipment in the power system. With the improvement of GIS voltage level and the development of power technology, higher and higher requirements are placed on the safe operation of power systems. Therefore, the stability of operation of GIS, an important power equipment, is also relatively improved. Problems encountered during GIS operation must also be solved accordingly to ensure the safety of its operation and the safety of power system operation.

[0003] The existence of operational overvoltage during the operation of GIS disconnectors is due to the fact that GIS equipment cannot directly observe the actual position of the equipment. For example, mechanical transmission failure and electrical interlock failure of GIS equipment may lead to serious equipment misoperation failures, which will affect the stability and safety of the entire power system. Therefore, in the operation of GIS equipment, how to reduce the probability of operational overvoltage and ensure the safety of GIS equipment operation is the key to solving the problem. Summary of the invention

[0004] The purpose of the present invention is to provide a GIS equipment isolating switch transient overvoltage detection system and method, aiming to solve the problem that the existing GIS equipment misoperation failure affects the stability and safety of the entire power system.

[0005] To achieve the above-mentioned object, in a first aspect, the present invention provides a GIS equipment isolating switch transient overvoltage detection system, the system comprising: an acquisition module, a processing module, an analysis module, a construction module, an alarm module and a verification module, wherein the acquisition module, the processing module, the analysis module, the construction module, the alarm module and the verification module are connected in sequence; The acquisition module is used to collect the transient overvoltage characteristics of the GIS equipment isolation switch in real time; The processing module is used to pre-process the transient overvoltage characteristics, extract the processed transient overvoltage characteristics, and draw relevant curve characteristics; The analysis module is used to analyze the characteristics of the relevant curves and then analyze the voltage and current distribution characteristics and the electric field distribution characteristics; The building module is used to construct data analysis and machine learning technology to establish a recognition model through the transient overvoltage characteristics; The alarm module is used to warn the recognition model design warning method and provide warning information to the substation operation and maintenance personnel; The verification module is used to verify the recognition model and the early warning method in an actual environment.

[0006] The processing module comprises a processing unit, an extraction unit and a drawing unit, wherein the processing unit, the extraction unit and the drawing unit are connected in sequence; The processing unit is used to amplify, filter and digitize the transient overvoltage characteristics to obtain processing data; The extraction unit is used to extract the digitized transient overvoltage characteristics to obtain extraction data; The drawing unit is used to draw relevant curve features for the extracted data.

[0007] The analysis module includes a voltage and current analysis unit and a GIS analysis unit, and the voltage and current analysis unit and the GIS analysis unit are connected in sequence; The voltage and current analysis unit is used to analyze the related curve characteristics and then analyze the transient housing overvoltage current distribution characteristics; The GIS analysis unit is used to analyze the electric field distribution characteristics of the GIS tank according to the characteristics of the correlation curve.

[0008] The alarm module includes an early warning unit and a positioning unit, and the early warning unit and the positioning unit are connected in sequence; The early warning unit is used to monitor the operation of the GIS equipment in real time and compare it with the recognition model. When abnormal operation is found, an early warning is issued to the power station operation and maintenance personnel; The positioning unit is used to generate corresponding device information according to the position of the abnormal operation device to obtain the abnormal location.

[0009] The GIS equipment isolating switch transient overvoltage detection system also includes an emergency stop module and a backup module, and the emergency stop module is connected to the backup module; The emergency stop module is used to emergency stop the GIS equipment with abnormal operation in response to the warning information; The backup module is used to activate the backup equipment corresponding to the abnormal GIS equipment in response to the early warning information to ensure the operation of the power system.

[0010] In a second aspect, the present invention further provides a detection method of a transient overvoltage detection system for a GIS equipment disconnector as described in any one of claims 1 to 5 above, the method comprising the following steps: The transient overvoltage characteristics of the GIS equipment isolation switch are collected in real time by the collection module, and the processing module pre-processes the transient overvoltage characteristics, extracts the processed transient overvoltage characteristics, and draws relevant curve characteristics; The analysis module analyzes the voltage and current distribution characteristics and the electric field distribution characteristics based on the related curve characteristics, and the construction module establishes an identification model based on data analysis and machine learning technology in combination with the transient overvoltage characteristics; The alarm module designs an early warning method based on the recognition model and provides early warning information to the substation operation and maintenance personnel. The verification module verifies the recognition model and the early warning method in an actual environment.

[0011] The transient overvoltage characteristics include frequency, amplitude, time domain and frequency domain analysis.

[0012] The present invention proposes a transient overvoltage detection system for a GIS equipment disconnector. The acquisition module acquires the transient overvoltage characteristics of the GIS equipment disconnector in real time. The processing module pre-processes the transient overvoltage characteristics, extracts the processed transient overvoltage characteristics, and draws related curve characteristics. The analysis module analyzes the voltage and current distribution characteristics and the electric field distribution characteristics based on the related curve characteristics. The construction module establishes an identification model based on the transient overvoltage characteristics based on data analysis and machine learning technology. The alarm module designs an early warning method based on the identification model to give an early warning and provides early warning information to the substation operation and maintenance personnel. The verification module verifies the identification model and the early warning method in an actual environment. The system can more accurately confirm the actual position of the GIS equipment disconnector, effectively prevent the operational risks that may be caused by mechanical transmission failure and electrical interlock failure, improve the accuracy and safety of equipment operation, and reduce the risk of equipment failure caused by human factors. By identifying the early warning method, abnormal equipment operation can be discovered in time to prevent the risk of equipment failure caused by operational errors, reduce equipment loss and maintenance costs, and improve the life and stability of the equipment, solving the problem that the existing GIS equipment misoperation failure affects the stability and safety of the entire power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The invention discloses a connection diagram of a transient overvoltage detection system for a GIS equipment isolating switch.

[0014] Figure 2 It is a schematic diagram of a processing module of a transient overvoltage detection system for a GIS equipment isolation switch provided by the present invention.

[0015] Figure 3 The present invention provides a schematic diagram of an analysis module of a transient overvoltage detection system for a GIS equipment isolating switch.

[0016] Figure 4 The present invention provides a schematic diagram of an alarm module of a transient overvoltage detection system for an isolating switch of a GIS device.

[0017] Figure 5 The present invention provides a flow chart for detecting transient overvoltage of a GIS equipment isolating switch.

[0018] In the figure: 1-acquisition module, 2-processing module, 3-analysis module, 4-construction module, 5-alarm module, 6-verification module, 7-processing unit, 8-extraction unit, 9-drawing unit, 10-voltage and current analysis unit, 11-GIS analysis unit, 12-early warning unit, 13-positioning unit, 14-emergency stop module, 15-backup module. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figures 1 to 4 In a first aspect, the present invention provides a GIS equipment isolating switch transient overvoltage detection system, comprising an acquisition module 1, a processing module 2, an analysis module 3, a construction module 4, an alarm module 5 and a verification module 6, wherein the acquisition module 1, the processing module 2, the analysis module 3, the construction module 4, the alarm module 5 and the verification module 6 are connected in sequence; The acquisition module 1 is used to collect the transient overvoltage characteristics of the GIS equipment isolation switch in real time; The processing module 2 is used to pre-process the transient overvoltage characteristics, extract the processed transient overvoltage characteristics, and draw relevant curve characteristics; The analysis module 3 is used to analyze the voltage and current distribution characteristics and the electric field distribution characteristics based on the related curve characteristics; Among them, building module 4 is to establish an identification model through the transient overvoltage characteristics based on data analysis and machine learning technology; Among them, the alarm module 5 is to design an early warning method based on the recognition model to provide early warning information to the substation operation and maintenance personnel; The verification module 6 is used to verify the recognition model and the early warning method in an actual environment.

[0021] In the embodiment of the present invention, the acquisition module 1 acquires the transient overvoltage characteristics of the GIS equipment disconnector in real time; the processing module 2 pre-processes the transient overvoltage characteristics, extracts the processed transient overvoltage characteristics, and draws the relevant curve characteristics; wherein the analysis module 3 is used to analyze the voltage and current distribution characteristics and the electric field distribution characteristics based on the relevant curve characteristics; wherein the construction module 4 establishes an identification model based on the transient overvoltage characteristics based on data analysis and machine learning technology; wherein the alarm module 5 designs an early warning method based on the identification model for early warning, and provides early warning information to the substation operation and maintenance personnel; wherein the verification module 6 verifies the identification model and the early warning method in the actual environment, the system can more accurately confirm the actual position of the GIS equipment disconnector, effectively prevent the operational risks that may be caused by mechanical transmission failure and electrical interlock failure, improve the accuracy and safety of equipment operation, reduce the risk of equipment failure caused by human factors, and through the identification and early warning method, can timely discover equipment operation abnormalities, prevent the risk of equipment failure caused by operational errors, reduce equipment loss and maintenance costs, improve the life and stability of equipment, and solve the problem of existing GIS equipment misoperation failure affecting the stability and safety of the entire power system.

[0022] Further, the processing module 2 includes a processing unit 7, an extraction unit 8 and a drawing unit 9, and the processing unit 7, the extraction unit 8 and the drawing unit 9 are connected in sequence; The processing unit 7 is used to amplify, filter and digitize the transient overvoltage characteristics to obtain processing data; The extraction unit 8 is used to extract the digitized transient overvoltage characteristics to obtain extraction data; The drawing unit 9 draws relevant curve features based on the extracted data.

[0023] In an embodiment of the present invention, the processing unit 7 amplifies, filters and digitizes the transient overvoltage characteristics to obtain processed data; the extraction unit 8 then extracts the digitized transient overvoltage characteristics to obtain extracted data; and the drawing unit 9 draws relevant curve characteristics based on the extracted data.

[0024] Further, the analysis module 3 includes a voltage and current analysis unit 10 and a GIS analysis unit 11, and the voltage and current analysis unit 10 and the GIS analysis unit 11 are connected in sequence; The voltage and current analysis unit 10 analyzes transient housing overvoltage and current distribution characteristics based on the relevant curve characteristics; The GIS analysis unit 11 analyzes the electric field distribution characteristics of the GIS tank based on the correlation curve characteristics.

[0025] In an embodiment of the present invention, the voltage and current analysis unit 10 analyzes transient shell overvoltage current distribution characteristics and response strategies based on the relevant curve characteristics; the GIS analysis unit 11 analyzes the GIS tank electric field distribution characteristics and formation mechanism based on the relevant curve characteristics.

[0026] Further, the alarm module 5 includes an early warning unit 12 and a positioning unit 13, and the early warning unit 12 and the positioning unit 13 are connected in sequence; The early warning unit 12 is used to monitor the operation of the GIS equipment in real time and compare it with the recognition model. When abnormal operation is found, an early warning is issued to the power station operation and maintenance personnel. The positioning unit 13 generates corresponding device information based on the position of the abnormally operated device to obtain the abnormal location.

[0027] In an embodiment of the present invention, the early warning unit 12 monitors the operation of the GIS equipment in real time and compares it with the identification model. When an abnormal operation is found, an early warning is issued to the power station operation and maintenance personnel; the positioning unit 13 generates corresponding equipment information according to the position of the equipment with abnormal operation and obtains the abnormal location, so that the operator can quickly locate the fault point and take corresponding measures to investigate and repair it, which helps to reduce the impact of equipment failure on the power system and improve the stability and reliability of the power system.

[0028] Furthermore, the GIS equipment isolating switch transient overvoltage detection system further includes an emergency stop module 14 and a backup module 15, and the emergency stop module 14 and the backup module 15 are connected; The emergency stop module 14 is configured to emergency stop the GIS equipment with abnormal operation based on the warning information; The backup module 15 activates the backup equipment corresponding to the abnormal GIS equipment based on the warning information to ensure the operation of the power system.

[0029] In an embodiment of the present invention, the emergency stop module 14 can emergency stop the GIS equipment with abnormal operation based on the early warning information, and can perform emergency protection for the abnormally operating GIS equipment and the power system to prevent equipment damage or accidents; at the same time, the backup module 15 can start the backup equipment corresponding to the abnormal GIS equipment based on the early warning information to ensure the operation of the power system.

[0030] See also Figure 5 In a second aspect, the present invention further provides a method for detecting transient overvoltage of a GIS equipment isolating switch, which is applied to the GIS equipment isolating switch transient overvoltage detection system described in the first aspect, and is characterized in that it comprises the following steps: S1 collects the transient overvoltage characteristics of the GIS equipment isolation switch in real time through the acquisition module 1, and the processing module 2 pre-processes the transient overvoltage characteristics, extracts the processed transient overvoltage characteristics, and draws the relevant curve characteristics; In an embodiment of the present invention, the acquisition module 1 acquires the transient overvoltage characteristics of the isolating switch of the GIS equipment in real time based on sensor technology, including the frequency, amplitude, time domain and frequency domain analysis of the shape, etc. The processing unit 7 amplifies, filters and digitizes the transient overvoltage characteristics to obtain processed data; the extraction unit 8 then extracts the digitized transient overvoltage characteristics to obtain extracted data; the drawing unit 9 draws relevant curve features according to the extracted data.

[0031] The analysis module 3 in step S2 is used to analyze the voltage and current distribution characteristics and the electric field distribution characteristics based on the related curve characteristics, and the construction module 4 is based on data analysis and machine learning technology, combined with the transient overvoltage characteristics to establish an identification model; In an embodiment of the present invention, the voltage and current analysis unit 10 analyzes the transient shell overvoltage current distribution characteristics and response strategies based on the relevant curve characteristics; the GIS analysis unit 11 analyzes the GIS tank electric field distribution characteristics and formation mechanism based on the relevant curve characteristics. The construction module 4 establishes an identification model based on data analysis and machine learning technology through the transient overvoltage characteristics. The identification model will be able to accurately judge the effectiveness of equipment operation, thereby avoiding problems caused by mechanical transmission failure or electrical interlock failure.

[0032] The alarm module 5 in step S3 designs an early warning method based on the recognition model and provides early warning information to the substation operation and maintenance personnel, and the verification module 6 verifies the recognition model and the early warning method in an actual environment.

[0033] In an embodiment of the present invention, the early warning unit 12 monitors the operation of the GIS equipment in real time and compares it with the identification model. When an abnormal operation is found, an early warning is issued to the power station operation and maintenance personnel; the positioning unit 13 generates corresponding equipment information according to the position of the equipment with abnormal operation and obtains the abnormal location, so that the operator can quickly locate the fault point. The verification module 6 verifies the identification model and the early warning method in an actual environment to ensure the normal operation of the system.

[0034] 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 transient overvoltage detection system for isolating switches of GIS equipment, characterized in that: The system comprises: a collection module, a processing module, an analysis module, a construction module, an alarm module and a verification module, wherein the collection module, the processing module, the analysis module, the construction module, the alarm module and the verification module are connected in sequence; The acquisition module is used to collect the transient overvoltage characteristics of the GIS equipment isolation switch in real time; The processing module is used to pre-process the transient overvoltage characteristics, extract the processed transient overvoltage characteristics, and draw relevant curve characteristics; The analysis module is used to analyze the characteristics of the relevant curves and then analyze the voltage and current distribution characteristics and the electric field distribution characteristics; The building module is used to construct data analysis and machine learning technology to establish a recognition model through the transient overvoltage characteristics; The alarm module is used to warn the recognition model design warning method and provide warning information to the substation operation and maintenance personnel; The verification module is used to verify the recognition model and the early warning method in an actual environment.

2. The GIS equipment isolation switch transient overvoltage detection system according to claim 1 is characterized in that: The processing module comprises a processing unit, an extraction unit and a drawing unit, wherein the processing unit, the extraction unit and the drawing unit are connected in sequence; The processing unit is used to amplify, filter and digitize the transient overvoltage characteristics to obtain processing data; The extraction unit is used to extract the digitized transient overvoltage characteristics to obtain extraction data; The drawing unit is used to draw relevant curve features for the extracted data.

3. The GIS equipment isolation switch transient overvoltage detection system according to claim 1 is characterized in that: The analysis module includes a voltage and current analysis unit and a GIS analysis unit, and the voltage and current analysis unit and the GIS analysis unit are connected in sequence; The voltage and current analysis unit is used to analyze the related curve characteristics and then analyze the transient housing overvoltage current distribution characteristics; The GIS analysis unit is used to analyze the electric field distribution characteristics of the GIS tank according to the characteristics of the correlation curve.

4. The GIS equipment isolation switch transient overvoltage detection system according to claim 1 is characterized in that: The alarm module includes an early warning unit and a positioning unit, and the early warning unit and the positioning unit are connected in sequence; The early warning unit is used to monitor the operation of the GIS equipment in real time and compare it with the recognition model. When abnormal operation is found, an early warning is issued to the power station operation and maintenance personnel; The positioning unit is used to generate corresponding device information according to the position of the abnormal operation device to obtain the abnormal location.

5. The GIS equipment isolation switch transient overvoltage detection system according to claim 1 is characterized in that: The GIS equipment isolating switch transient overvoltage detection system also includes an emergency stop module and a backup module, and the emergency stop module is connected to the backup module; The emergency stop module is used to emergency stop the GIS equipment with abnormal operation in response to the warning information; The backup module is used to activate the backup equipment corresponding to the abnormal GIS equipment in response to the early warning information to ensure the operation of the power system.

6. The detection method of the transient overvoltage detection system of the GIS equipment isolation switch according to any one of claims 1 to 5, characterized in that: The following steps are involved: The transient overvoltage characteristics of the GIS equipment isolation switch are collected in real time by the collection module, and the processing module pre-processes the transient overvoltage characteristics, extracts the processed transient overvoltage characteristics, and draws relevant curve characteristics; The analysis module analyzes the voltage and current distribution characteristics and the electric field distribution characteristics based on the related curve characteristics, and the construction module establishes an identification model based on data analysis and machine learning technology in combination with the transient overvoltage characteristics; The alarm module designs an early warning method based on the recognition model and provides early warning information to the substation operation and maintenance personnel. The verification module verifies the recognition model and the early warning method in an actual environment.

7. The method for detecting transient overvoltage of a GIS equipment isolation switch according to claim 6 is characterized in that: The transient overvoltage characteristics include frequency, amplitude, time domain and frequency domain analysis.

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