A method for resisting communication interference of GIS partial discharge detection system

Abstract

This invention discloses a method for resisting communication interference in a GIS partial discharge detection system, comprising: a GIS gas chamber, wherein an anti-communication interference device is fixedly sleeved on the outside of the GIS gas chamber, and the front side of the anti-communication interference device has an installation port, and a GIS basin-type insulator is fixedly connected to the installation port; a first external sensor and a second external sensor are fixedly connected inside the GIS basin-type insulator; and a current transformer secondary lead box, wherein the current transformer secondary lead box is installed inside the GIS gas chamber, and a built-in sensor is fixedly connected inside the current transformer secondary lead box. Through the overall structure of the device, and by using one built-in sensor and two external sensors in conjunction, the signal from the built-in sensor (after anti-interference processing) is compared and analyzed with the signal from the external sensors, thereby better analyzing the composition of environmental communication interference signals, and based on this, analyzing the efficiency of the anti-communication interference device.

Description

Technical Field

[0001] This invention relates to the field of partial discharge detection technology for gas-insulated GIS equipment, and more specifically, to a method for resisting communication interference in a GIS partial discharge detection system. Background Technology

[0002] Gas-insulated switchgear (GIS) is a critical piece of equipment in power transmission and transformation systems. Failure in GIS can lead to major accidents. The most common fault in GIS is partial discharge occurring before complete insulation breakdown or flashover. Currently, various technologies can be used to detect partial discharge in GIS from different perspectives, thereby identifying potential insulation defects within the GIS and preventing accidents caused by insulation problems.

[0003] Partial discharge pulses occurring in SF6 gas last for several nanoseconds, with a pulse current rise time of approximately 1 nanosecond, and the electromagnetic wave frequencies they generate can reach several GHz. However, because the cavity of a GIS (Gas Insulated Geological Component) is a coaxial waveguide cavity structure, the generated electromagnetic wave signals can propagate effectively within the cavity with minimal loss. Corona discharge pulses in air have a longer duration and a longer wavefront rise time, and their frequencies are generally below 150 MHz, attenuating rapidly with increasing frequency.

[0004] Therefore, partial discharge can be detected by detecting the ultra-high frequency band (300-3000MHz) signal in the electromagnetic waves emitted by partial discharge. Using ultra-high frequency detection can avoid the disadvantages of interference such as corona in the power system that are difficult to avoid in conventional electrical testing methods, and improve the signal-to-noise ratio of partial discharge detection.

[0005] When using the ultra-high frequency method to detect partial discharge, the selected ultra-high frequency sensor is usually placed close to the GIS basin insulator for measurement. However, if there are devices in the surrounding environment that may cause communication interference, the signal detected by the ultra-high frequency sensor will mostly be a communication interference signal. In this case, the partial discharge signal is particularly small, and it is also impossible to distinguish between communication interference signals of the same frequency and partial discharge signals, resulting in inaccurate detection results.

[0006] In real-world environments, there are many electromagnetic interferences. Due to the complexity of these interferences, there is currently little research on electromagnetic interference in partial discharge detection, and there is a lack of evaluation systems to assess the ability to resist electromagnetic interference. Therefore, we propose a communication interference-resistant method for GIS partial discharge detection systems. Summary of the Invention

[0007] The purpose of this invention is to provide a method for resisting communication interference in a GIS partial discharge detection system. By using a built-in sensor and two external sensors in combination, the signal from the built-in sensor, which has undergone anti-interference processing, is compared and analyzed with the signal from the external sensors to better analyze the composition of environmental communication interference signals, and on this basis, the efficiency of the anti-communication interference device is analyzed.

[0008] The technical solution adopted by the anti-communication interference method of the GIS partial discharge detection system disclosed in this invention is: an anti-communication interference method of the GIS partial discharge detection system, comprising:

[0009] The GIS air chamber has an anti-communication interference device fixedly sleeved on its outer side, and the front side of the anti-communication interference device has an installation port, and the installation port is fixedly connected to a GIS basin insulator. The GIS basin insulator has a first external sensor and a second external sensor fixedly connected inside.

[0010] The secondary lead box of the current transformer is installed inside the GIS gas chamber, and a built-in sensor is fixedly connected inside the secondary lead box of the current transformer.

[0011] As a preferred embodiment, the first external sensor, the second external sensor, and the built-in sensor are all connected to the anti-interference circuit via transmission lines, and the anti-interference circuit is connected to the signal analysis module via transmission lines.

[0012] As a preferred embodiment, the sidewall of the GIS basin insulator is tightly fitted with the mounting port of the anti-communication interference device.

[0013] As a preferred embodiment, the anti-interference circuit comprises an input terminal V0, a ​​power supply V, resistors R1, R2, R3, R4, R5, and R6, and an amplifier. The input terminal V0 is connected to resistors R1, R2, and R4, which are connected in parallel, and resistor R2 is grounded. Resistor R1 is connected to resistor R3, which is connected to resistor R6 and the negative terminal of the amplifier. Resistor R4 is connected to the positive terminal of the amplifier and resistor R5, which is grounded. Resistor R6 is connected to the output terminal V1 of the amplifier.

[0014] As a preferred embodiment, the amplifier is connected to a -12V power supply and a +12V power supply respectively, the resistor R1 is connected to power supply V, and power supply V is grounded, and power supply V is a 10V power supply.

[0015] As a preferred embodiment, a method for resisting communication interference in a GIS partial discharge detection system includes the following steps:

[0016] Step 1: Detect ultra-high frequency signals using built-in sensors;

[0017] Step 2: Detect ultra-high frequency signals using a first external sensor and a second external sensor, with the second external sensor not having undergone anti-interference processing;

[0018] Step 3: Input the signals from the first external sensor, the second external sensor, and the built-in sensor into the signal analysis module through the anti-interference circuit for comparative analysis.

[0019] As a preferred embodiment, the comparative analysis results of the signal analysis module are as follows:

[0020] 1) If the signals detected by the first external sensor, the second external sensor, and the built-in sensor are similar, it indicates that there is no communication interference;

[0021] 2) If the signals detected by the built-in sensor are significantly different from those detected by the first external sensor and the second external sensor, it proves that there is communication interference in the environment.

[0022] As a preferred embodiment, after the signals detected by the built-in sensor are significantly different from those detected by the first external sensor and the second external sensor, the signals detected by the first external sensor and the second external sensor can be evaluated to analyze the anti-interference performance of the anti-communication interference device.

[0023] As a preferred embodiment, the analysis of the anti-interference performance of the anti-communication interference device further includes the following steps:

[0024] Step 1: Compare and analyze the signals detected by the built-in sensor with those detected by the first or second external sensor.

[0025] Step 2: When the first external sensor and the second external sensor are different, if the signal current value detected by the built-in sensor is equal to the signal current value detected by the first external sensor, the anti-interference performance is at the optimal level. If the signal current value detected by the built-in sensor is greater than or less than the signal current value detected by the first external sensor in the first stage, the anti-interference is at level one. And so on, the anti-interference level is level two, level three, up to level n.

[0026] The beneficial effects of the communication interference prevention method and system of the GIS partial discharge detection system disclosed in this invention are as follows:

[0027] By utilizing the overall structure of the device, and through the cooperation of one built-in sensor and two external sensors, the signals from the built-in sensor (which has undergone anti-interference processing) are compared and analyzed with those from the external sensors. This allows for a better analysis of the composition of environmental communication interference signals. Furthermore, the efficiency of the anti-interference device is analyzed, and the anti-interference effect is visualized through the information analysis module, making the detection results clearer and providing relevant data support for subsequent system improvements. Simultaneously, the invention employs an anti-interference circuit, which prevents external interference signals from interfering with the signal transmission of the first external sensor, the second external sensor, and the built-in sensor. This ensures that the first external sensor, the second external sensor, and the built-in sensor accurately transmit signals to the signal analysis module, resulting in more accurate signal comparison and analysis. The detected signals, after anti-interference processing, have a small detection error. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the present invention;

[0029] Figure 2 This is a cross-sectional view of the GIS basin insulator of the present invention;

[0030] Figure 3 This is a structural diagram showing the installation location of the built-in sensor in this invention;

[0031] Figure 4 This is a schematic diagram of the invention;

[0032] Figure 5 This is a circuit diagram of the anti-interference circuit of the present invention.

[0033] In the diagram: 1. GIS air chamber; 2. Anti-communication interference device; 3. GIS basin insulator; 4. First external sensor; 5. Second external sensor; 6. Current transformer secondary lead box; 7. Built-in sensor; 8. Anti-interference circuit; 9. Signal analysis module. Detailed Implementation

[0034] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0035] Please see Figure 1-5 This invention provides a method for resisting communication interference in a GIS partial discharge detection system, comprising:

[0036] GIS air chamber 1, an anti-communication interference device 2 is fixedly sleeved on the outside of the GIS air chamber 1, and an installation port is opened on the front side of the anti-communication interference device 2, and a GIS basin insulator 3 is fixedly connected to the installation port. A first external sensor 4 and a second external sensor 5 are fixedly connected inside the GIS basin insulator 3.

[0037] The secondary lead box 6 of the current transformer is installed inside the GIS air chamber 1, and a built-in sensor 7 is fixedly connected inside the secondary lead box 6 of the current transformer.

[0038] Specifically: the built-in sensor 7, the first external sensor 4, and the second external sensor 5 all use sensors that are already available on the market, and the specifications and models of the built-in sensor 7, the first external sensor 4, and the second external sensor 5 are the same. The built-in sensor 7, the first external sensor 4, and the second external sensor 5 are all current sensors. The anti-interference device 2 is an anti-interference housing. The built-in sensor 7 will not affect the sealing of the GIS equipment. The device has strong anti-interference ability, and the measurement is relatively accurate.

[0039] The first external sensor 4, the second external sensor 5, and the built-in sensor 7 are all connected to the anti-interference circuit 8 via transmission lines, and the anti-interference circuit 8 is connected to the signal analysis module 9 via transmission lines.

[0040] Specifically, the anti-interference circuit 8 can prevent external interference signals from interfering with the signal transmission of the first external sensor 4, the second external sensor 5, and the built-in sensor 7. This allows the first external sensor 4, the second external sensor 5, and the built-in sensor 7 to accurately transmit signals to the signal analysis module 9, thereby making the signal comparison and analysis of the first external sensor 4, the second external sensor 5, and the built-in sensor 7 more accurate. The detected signals have undergone anti-interference processing, resulting in smaller detection errors.

[0041] The sidewall of the GIS basin insulator 3 is tightly fitted with the mounting port of the anti-communication interference device 2.

[0042] The anti-interference circuit 8 consists of an input terminal V0, a ​​power supply V, resistors R1, R2, R3, R4, R5, and R6, and an amplifier. The input terminal V0 is connected to resistors R1, R2, and R4, which are connected in parallel, and resistor R2 is grounded. Resistor R1 is connected to resistor R3, which is connected to resistor R6 and the negative terminal of the amplifier. Resistor R4 is connected to the positive terminal of the amplifier and resistor R5, which is grounded. Resistor R6 is connected to the output terminal V1 of the amplifier.

[0043] The amplifier is connected to a -12V power supply and a +12V power supply respectively. The resistor R1 is connected to power supply V, which is grounded and is a 10V power supply.

[0044] A method for resisting communication interference in a GIS partial discharge detection system includes the following steps:

[0045] Step 1: Detect the ultra-high frequency signal using the built-in sensor 7;

[0046] Step 2: Detect ultra-high frequency signals using the first external sensor 4 and the second external sensor 5, where the second external sensor 5 is not subjected to anti-interference processing;

[0047] Step 3: Input the signals from the first external sensor 4, the second external sensor 5, and the built-in sensor 7 into the signal analysis module 9 through the anti-interference circuit 8 for comparative analysis.

[0048] The comparative analysis results of the signal analysis module 9 are as follows:

[0049] 1. If the signals detected by the first external sensor 4, the second external sensor 5, and the built-in sensor 7 are similar, it indicates that there is no communication interference;

[0050] 2. If the signals detected by the built-in sensor 7 are significantly different from those detected by the first external sensor 4 and the second external sensor 5, it proves that there is communication interference in the environment.

[0051] After the built-in sensor 7 detects a signal that is significantly different from that detected by the first external sensor 4 and the second external sensor 5, the signals detected by the first external sensor 4 and the second external sensor 5 can be evaluated to analyze the anti-interference performance of the anti-communication interference device.

[0052] Specifically: The signals detected by the built-in sensor 7, the first external sensor 4, and the second external sensor 5 are input into the signal analysis module for comparison and analysis. If the signals detected by the built-in sensor 7, the first external sensor 4, and the second external sensor 5 are similar, it indicates that there is no communication interference.

[0053] If the signal from the built-in sensor 7 is significantly different from that of the first external sensor 4 or the second external sensor 5, it proves that there is communication interference in the environment.

[0054] By comparing and analyzing the differences between the built-in sensor 7 and the first external sensor 4 or the second external sensor 5, the main frequencies of external communication interference can be obtained. Given the known information about the communication interference, the signals detected by the built-in sensor 7 and the first external sensor 4 or the second external sensor 5 are evaluated to analyze the anti-interference performance of the anti-communication interference device.

[0055] After obtaining information on interference signals in the environment and analyzing the anti-interference performance of the device, other improvement methods can be adopted to carry out targeted anti-interference processing.

[0056] The analysis of the anti-interference performance of the anti-communication interference device also includes the following steps:

[0057] Step 1: Compare and analyze the signals detected by the built-in sensor 7 with those detected by the first external sensor 4 or the second external sensor 5.

[0058] Step 2: When the first external sensor 4 and the second external sensor 5 are different, if the signal current value detected by the built-in sensor 7 is equal to the signal current value detected by the first external sensor 4, the anti-interference performance is at the optimal level. If the signal current value detected by the built-in sensor 7 is greater than or less than the signal current value detected by the first external sensor 4 in the first stage, the anti-interference is at level one. And so on, the anti-interference level is level two, level three, up to level n.

[0059] If the signal current value detected by the built-in sensor 7 is greater than or less than the signal current value detected by the first external sensor 4 or the second external sensor 5 in the first stage, the second stage, the third stage to the nth stage, the corresponding anti-interference level is level one, level two, level three up to level n, and n is a positive integer. The values ​​of the first stage are [-1mA, 0] and [0, 1mA]; the values ​​of the second stage are [-2mA, -1mA] and [1mA, 2mA]; the values ​​of the third stage are [-3mA, -2mA] and [2mA, 3mA] up to the nth stage, which is [-nmA, -(n-1)mA] and [(n-1)mA, nmA].

[0060] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and mobile application products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by mobile application instructions. These mobile application instructions can be provided to a processor of a general-purpose mobile phone, a special-purpose mobile phone, an embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which execute via the processor of the mobile phone or other programmable data processing device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A system that specifies functions in one or more boxes.

[0061] These mobile phone program instructions may also be stored in a mobile phone readable storage device that can direct a mobile phone or other programmable data processing device to operate in a specific manner, such that the instructions stored in the mobile phone readable storage device produce an article of manufacture including an instruction system implemented in the process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0062] These mobile application instructions can also be loaded onto a mobile phone or other programmable data processing device, causing a series of operational steps to be performed on the mobile phone or other programmable device to produce a process implemented by the mobile phone, thereby providing instructions that execute on the mobile phone or other programmable device for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the functions specified in one or more boxes. Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0063] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for anti-jamming communication of a GIS partial discharge detection system, characterized in that: include: GIS air chamber (1), an anti-communication interference device (2) is fixedly sleeved on the outside of the GIS air chamber (1), and an installation port is opened on the front side of the anti-communication interference device (2), and a GIS basin insulator (3) is fixedly connected to the installation port. A first external sensor (4) and a second external sensor (5) are fixedly connected inside the GIS basin insulator (3). The current transformer secondary lead box (6) is installed inside the GIS air chamber (1), and a built-in sensor (7) is fixedly connected inside the current transformer secondary lead box (6). The first external sensor (4), the second external sensor (5) and the built-in sensor (7) are all connected to the anti-interference circuit (8) through a transmission line, and the anti-interference circuit (8) is connected to the signal analysis module (9) through a transmission line; The method specifically includes the following steps: Step 1: Detect the ultra-high frequency signal using the built-in sensor (7); Step 2: Detect ultra-high frequency signals through the first external sensor (4) and the second external sensor (5), and the second external sensor (5) is not subjected to anti-interference processing; Step 3: The signals from the first external sensor (4), the second external sensor (5), and the built-in sensor (7) are respectively input into the signal analysis module (9) through the anti-interference circuit (8) for comparative analysis. The comparative analysis results are as follows: 1) If the signals detected by the first external sensor (4), the second external sensor (5) and the built-in sensor (7) are similar, it indicates that there is no communication interference; 2) If the signal detected by the built-in sensor (7) is significantly different from that detected by the first external sensor (4) or the second external sensor (5), it proves that there is communication interference in the environment; Analyzing communication interference resistance also includes the following steps: Comparative analysis of the signals detected by the built-in sensor (7) and the first external sensor (4); When the signals detected by the first external sensor (4) and the second external sensor (5) are different, if the signal current value detected by the built-in sensor (7) is equal to the signal current value detected by the first external sensor (4), the anti-interference performance is at the best level. If the signal current value detected by the built-in sensor (7) is greater than or less than the signal current value detected by the first external sensor (4) in the first stage, the anti-interference performance is at the first level. Similarly, the anti-interference levels are Level 2, Level 3, up to Level n, where n is a positive integer. The values ​​for the first stage are [-1mA, 0] and [0, 1mA], the values ​​for the second stage are [-2mA, -1mA] and [1mA, 2mA], the values ​​for the third stage are [-3mA, -2mA] and [2mA, 3mA], and the values ​​for the nth stage are [-nmA, -(n-1)mA] and [(n-1)mA, nmA].

2. The anti-communication interference method of a GIS partial discharge detection system according to claim 1, characterized in that: The sidewall of the GIS basin insulator (3) is tightly fitted with the mounting port of the anti-communication interference device (2).

3. The anti-interference communication method of a GIS partial discharge detection system according to claim 1, characterized in that: The anti-interference circuit (8) consists of an input terminal V0, a ​​power supply V, resistors R1, R2, R3, R4, R5, R6, and an amplifier. The input terminal V0 is connected to resistors R1, R2, and R4, which are connected in parallel. Resistor R2 is grounded. Resistor R1 is connected to resistor R3, which is connected to resistor R6 and the negative terminal of the amplifier. Resistor R4 is connected to the positive terminal of the amplifier and resistor R5, which is grounded. Resistor R6 is connected to the output terminal V1 of the amplifier.

4. The method for resisting communication interference in a GIS partial discharge detection system according to claim 3, characterized in that: The amplifier is connected to a -12V power supply and a +12V power supply respectively. The resistor R1 is connected to power supply V, which is grounded and is a 10V power supply.

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