Portable GIS partial discharge state monitoring device

Abstract

The utility model discloses a portable GIS partial discharge state monitoring device, which comprises a box body, a portable belt, an electric field sensor module, a high-frequency device module and a monitoring module, wherein the box body is of a hollow structure, and the hand strap is arranged above the box body; the electric field sensor module is arranged on the surface of the box body and is used for detecting partial discharge signals of the GIS equipment; the input end of the high-frequency device module is electrically connected with the output end of the electric field sensor module, and the high-frequency device module is used for receiving the partial discharge signal and amplifying the partial discharge signal into a high-frequency signal; the monitoring module comprises a signal processing module, a data acquisition module, a display module and a prompt module, the input end of the signal processing module is electrically connected with the output end of the high-frequency device module, and the signal processing module is used for amplifying, filtering and denoising the high-frequency signal. The GIS equipment partial discharge monitoring device has the advantages of being convenient to carry, smaller in size and more visual in information display and prompt, and can monitor the partial discharge position of GIS equipment more accurately.

Description

Technical Field

[0001] The utility model relates to a monitoring device, in particular to a portable GIS partial discharge state monitoring device. Background Art

[0002] Gas-insulated metal-enclosed switchgear is a metal-enclosed switchgear and control equipment that uses gas at a pressure higher than atmospheric pressure as the insulating medium in at least one part. GIS (GAS INSULATED SWITCHGEAR) is the English abbreviation for gas-insulated fully enclosed switchgear. GIS consists of circuit breakers, disconnectors, grounding switches, transformers, lightning arresters, busbars, connectors and outgoing terminals. These devices or components are all enclosed in a metal grounded casing, and are filled with SF6 insulating gas at a certain pressure, so it is also called SF6 fully enclosed switchgear. Since GIS equipment was put into practical use in the 1960s, it has been widely used all over the world. GIS is not only widely used in high-voltage and ultra-high-voltage fields, but also in ultra-high-voltage fields. Compared with conventional open substations, the advantages of GIS are compact structure, small footprint, high reliability, flexible configuration, easy installation, strong safety, strong environmental adaptability, small maintenance workload, and the maintenance interval of its main components is not less than 20 years. GIS is a high-voltage electrical equipment with high operating reliability, low maintenance workload and long maintenance cycle. Its failure rate is only 20% to 40% of conventional equipment, but GIS also has its inherent disadvantages. Due to the leakage of SF6 gas, the infiltration of external moisture, the presence of conductive impurities, the aging of insulators and other factors, it may cause internal flashover failure of GIS. The fully sealed structure of GIS makes it difficult to locate and repair the fault, and the maintenance work is complicated. The average power outage maintenance time after the accident is longer than that of conventional equipment, and the power outage range is large, often involving non-faulty components.

[0003] Partial discharge is a discharge that occurs only in a local area of ​​an insulator without penetrating between the conductors to which the voltage is applied. This phenomenon can occur near the conductor or elsewhere. Partial discharge may cause damage to the insulation material, thereby reducing the insulation life. Each discharge may result in the impact of high-energy electrons or accelerated electrons, which can cause various forms of physical effects and chemical reactions, such as destroying the molecular structure of the insulation and causing insulation degradation.

[0004] The existing GIS partial discharge monitoring instrument looks like a suitcase, which is very inconvenient to place after being moved. Generally, inspectors will place the GIS partial discharge monitoring instrument on the ground for testing. For inspectors, due to their height and body shape, it is extremely inconvenient to operate and view the instrument placed on the ground.

[0005] In view of the above problems, the utility model improves the existing monitoring device and provides a portable GIS partial discharge status monitoring device which is easy to carry, smaller in size, and has more intuitive display and prompt information. At the same time, it can more accurately monitor the location of partial discharge of GIS equipment. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a portable GIS partial discharge status monitoring device, which has the advantages of being easy to carry, smaller in size, and more intuitive in displaying and prompting information, and can more accurately monitor the location of partial discharge of GIS equipment.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A portable GIS partial discharge state monitoring device comprises a box, a hand strap, an electric field sensor module, a high frequency generator module and a monitoring module; wherein the box is a hollow structure, and the hand strap is arranged above the box; the electric field sensor module is arranged on the surface of the box, and is used to detect partial discharge signals of GIS equipment; the input end of the high frequency generator module is electrically connected to the output end of the electric field sensor module, and is used to receive partial discharge signals and expand and process the partial discharge signals into high frequency signals; the monitoring module comprises a signal processing module, a data acquisition module, a display module and a prompt module, wherein the input end of the signal processing module is electrically connected to the output end of the high frequency generator module, and is used to amplify, filter and denoise the high frequency signals; the input end of the data acquisition module is electrically connected to the output end of the signal processing module, and is used to convert the high frequency signals processed by the signal processing module into digital signals; the display module and the prompt module are both arranged on the surface of the box, and the input end of the display module is electrically connected to the output end of the digital acquisition module, and is used to process and analyze digital signals, and display partial discharge state information of GIS equipment and generate monitoring data; the input end of the prompt module is electrically connected to the output end of the display module, and is used to issue an abnormal alarm when the monitoring data exceeds a normal range.

[0009] Furthermore, the high-frequency module includes a sealed box, a signal access hole, a sleeve, a spectrum expander, a thin iron sheet, a receiver and a signal outlet hole; the sealed box is arranged in a box body; the signal access hole is installed on one side of the sealed box, and its input end is located outside the sealed box, which is used to be electrically connected to the output end of the electric field sensor module, and its output end is located in the sealed box; the sleeve and the spectrum expander are arranged in the sealed box, and the two ends of the sleeve are respectively connected to the output end of the signal access hole and the input end of the spectrum expander; the signal outlet hole and the receiver are arranged on the other side of the sealed box relative to the signal access hole, the input end of the signal outlet hole is located in the sealed box, and the output end is located outside the sealed box, which is used to be electrically connected to the input end of the signal processing module; the output end of the receiver is connected to the input end of the signal outlet hole; the thin iron sheet is arranged between the output end of the spectrum expander and the input end of the receiver.

[0010] Furthermore, the display module includes a display screen arranged on the surface of the box; and the data acquisition module includes a high-speed analog-to-digital converter.

[0011] Furthermore, the prompt module includes a plurality of signal lights arranged on the surface of the box.

[0012] Furthermore, the portable GIS partial discharge status monitoring device also includes a single-chip microcomputer module; the single-chip microcomputer module includes a single-chip microcomputer and its peripheral circuits, and the input ends of the monitoring module, the high-frequency module and the electric field sensor module are electrically connected to the output end of the single-chip microcomputer.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a portable GIS partial discharge state monitoring device. After the electric field sensor module detects the partial discharge signal of the GIS equipment, the signal is sent to the high frequency module. The high frequency module expands and processes the partial discharge signal into a high frequency signal to more accurately locate the position of the partial discharge of the GIS equipment. After receiving the high frequency signal, the signal processing module amplifies, filters and denoises the signal, and sends the processed signal to the data acquisition module. The data acquisition module converts the signal into a digital signal. The display module processes and analyzes the digital signal, and then displays the partial discharge state information of the GIS equipment in real time, including the discharge position, discharge type, discharge intensity and other information, and generates monitoring data at the same time. When the display module analyzes that the monitoring data exceeds the normal range, the control prompt module sends an abnormal alarm to remind relevant staff. The monitoring device is small in size and is provided with a hand strap, which has the advantage of being easy to carry. The display module and the prompt module are both arranged on the surface of the box, which has the advantage of more intuitive display and prompt information. After the signal detected by the electric field sensor module is expanded and processed into a high frequency signal by the high frequency module, the position of the partial discharge of the GIS equipment can be monitored more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external structure of an embodiment of the utility model.

[0016] Figure 2 It is a structural schematic diagram of a high frequency device module according to an embodiment of the utility model.

[0017] Figure 3 It is a principle block diagram of an embodiment of the utility model.

[0018] Figure 4 It is a circuit diagram of a single chip microcomputer module according to an embodiment of the utility model.

[0019] The numbers in the figure are: 1. Box; 11. Pulley; 12. Heat dissipation blade; 13. Inlet terminal; 2. Hand strap; 3. Electric field sensor module; 4. High frequency module; 41. Sealing box; 42. Signal access hole; 43. Bushing; 44. Spectrum expander; 45. Thin iron sheet; 46. Receiver; 47. Signal outlet hole; 5. Monitoring module; 51. Signal processing module; 52. Data acquisition module; 53. Display module; 531. Display screen; 54. Prompt module; 541. Signal light; 55. Power module; 6. Single chip microcomputer module. DETAILED DESCRIPTION

[0020] The utility model is described below in conjunction with the accompanying drawings. The specific implementation methods described herein are only used to illustrate and explain the utility model and are not used to limit the utility model. Without departing from the design spirit of the utility model, various modifications and improvements made to the technical solution of the utility model by ordinary technicians in this field should fall within the protection scope of the utility model.

[0021] like Figures 1 to 4 As shown, the portable GIS partial discharge status monitoring device of this embodiment includes a box body 1, a hand strap 2, an electric field sensor module 3, a high frequency module 4 and a monitoring module 5.

[0022] The box body 1 is a hollow structure, and the hand strap 2 is arranged on the top of the box body 1. Specifically, the hand strap 2 is connected to the traction buckle welded on the top of the box body 1, and the tightness of the hand strap 2 can be adjusted by the hand strap buckle. Four pulleys 11 are arranged at the bottom of the box body 1, and screw holes are arranged at the four corners at the bottom of the box body 1. The four pulleys 11 are arranged at the four corners at the bottom of the box body 1 respectively, and are fastened to the bottom of the box body 1 by bolts. The side wall of the box body 1 is provided with heat dissipation blades 12, and the heat dissipation blades 12 are installed on the box body 1 by opening a long opening in the middle of the side wall of the box body 1 and by bolts and nuts. The side wall of the box body 1 is also provided with an inlet terminal 13, which includes three types of wiring terminal holes: small, medium and large, and can be connected with various line types.

[0023] The electric field sensor module 3 is arranged on the surface of the box 1 to detect the partial discharge signal of the GIS equipment. The electric field sensor module 3 of this embodiment includes an SDC-W01 electric field sensor, which is a highly sensitive electric field sensor.

[0024] The input end of the high frequency module 4 is electrically connected to the output end of the electric field sensor module 3, and is used to receive the local discharge signal and expand the local discharge signal into a high frequency signal. Specifically in this embodiment, the high frequency module 4 includes a sealed box 41, a signal access hole 42, a sleeve 43, a spectrum expander 44, a thin iron sheet 45, a receiver 46 and a signal outlet hole 47. Among them, the sealed box 41 is arranged in the box body 1. The signal access hole 42 is installed on one side of the sealed box 41, and its input end is located outside the sealed box 41, and is used to be electrically connected to the output end of the electric field sensor module 3, that is, connected to the data line of the electric field sensor, and its output end is located in the sealed box 41. The sleeve 43 and the spectrum expander 44 are arranged in the sealed box 41, and the two ends of the sleeve 43 are respectively connected to the output end of the signal access hole 42 and the input end of the spectrum expander 44. The signal outlet hole 47 and the receiver 46 are arranged on the other side of the sealed box 41 relative to the signal access hole 42, and the input end of the signal outlet hole 47 is located in the sealed box 41, and the output end is located outside the sealed box 41. The output end of the receiver 46 is connected to the input end of the signal outlet hole 47. The thin iron sheet 45 is arranged between the output end of the spectrum expander 44 and the input end of the receiver 46.

[0025] The working principle of the high-frequency module 4 is: when the electric field sensor module 3 detects the local discharge signal of the GIS equipment, the electric field sensor module 3 sends the signal to the signal access hole 42 via the data line, and the local discharge signal is sent to the expander 44 via the sleeve 43. The function of the sleeve 43 is to prevent the signal from being disturbed. The expander 44 expands the local discharge signal to a high-frequency signal. The expanded high-frequency signal is emitted from the output end of the expander 44, resonates through the thin iron sheet 45, and then enters the receiver 46. Then the receiver 46 transmits the expanded and resonated signal to the signal outlet hole 47.

[0026] The monitoring module 5 includes a signal processing module 51 , a data acquisition module 52 , a display module 53 , a prompt module 54 and a power supply module 55 .

[0027] Among them, the signal processing module 51 and the data acquisition module 52 are both arranged in the box 1, and the input end of the signal processing module 51 is electrically connected to the output end of the high frequency module 4, and is used to amplify, filter and denoise the high frequency signal. Specifically, the input end of the signal processing module 51 is electrically connected to the signal outlet hole 47 of the high frequency module 4. The signal processing module 51 includes an amplifier circuit and a filter circuit, wherein the amplifier circuit and the filter circuit adopt any adaptable circuit in life, and the amplifier circuit is used to amplify the high frequency signal to improve the signal-to-noise ratio. After that, the filter circuit filters the high frequency signal to remove the noise interference, and finally uses the denoising algorithm to further remove the noise in the signal to improve the purity of the signal.

[0028] The input end of the data acquisition module 52 is electrically connected to the output end of the signal processing module 51, and is used to convert the high-frequency signal processed by the signal processing module 51 into a digital signal. The data acquisition module 52 uses a high-speed analog-to-digital converter (ADC) to convert the high-frequency signal (analog signal) processed by the signal processing module 51 into a digital signal, which is convenient for subsequent data processing and analysis.

[0029] The display module 53 and the prompt module 54 are both arranged on the surface of the housing 1. The input end of the display module 53 is electrically connected to the output end of the data acquisition module 52, and is used to process and analyze digital signals, and to display the partial discharge status information of the GIS equipment and generate monitoring data. The display module 53 includes a display screen 531 arranged on the surface of the housing 1. The display screen 531 is a high-resolution display screen, and is used to display the partial discharge status information of the GIS equipment in real time. The display content includes information such as the discharge position, discharge type and discharge intensity. The display module 53 has data analysis and processing functions, and can perform real-time analysis on the monitoring data and provide corresponding charts and trend analysis results.

[0030] The input end of the prompt module 54 is electrically connected to the output end of the display module 53, and is used to issue an abnormal alarm when the monitoring data exceeds the normal range. The prompt module 54 of this embodiment includes six signal lights 541, namely a power light, a stop light, a start light, a fault light, a running light, and a maintenance light. The six signal lights 541 are arranged below the display screen 531. When the monitoring data analyzed by the display module 53 exceeds the normal range, or when abnormal data appears, the display module 53 issues an abnormal warning and controls the corresponding signal lights 541 of the prompt module 54 to flash, and an alarm has been issued.

[0031] The power supply module 55 provides operating voltage for the signal processing module 51 , the data acquisition module 52 , the display module 53 and the prompt module 54 .

[0032] When in use, the box 1 is moved close to the GIS equipment and then the power is turned on. After the electric field sensor module 3 detects the local discharge signal of the GIS equipment, the signal is sent to the high-frequency module 4. The high-frequency module 4 amplifies the local discharge signal into a high-frequency signal to more accurately locate the position of the local discharge of the GIS equipment. After receiving the high-frequency signal, the signal processing module 51 amplifies, filters and denoises the signal, and sends the processed signal to the data acquisition module 52. The data acquisition module 52 converts the signal into a digital signal. The display module 53 processes and analyzes the digital signal, and then displays the local discharge status information of the GIS equipment in real time, including the discharge position, discharge type, discharge intensity and other information, and generates monitoring data at the same time. When the display module 53 analyzes that the monitoring data exceeds the normal range, the control prompt module 54 issues an abnormal alarm to remind relevant staff. The monitoring device is small in size and is provided with a hand strap 2, which has the advantage of being easy to carry; the display module 53 and the prompt module 54 are both arranged on the surface of the box 1, which has the advantage of more intuitive display and prompt information; the signal detected by the electric field sensor module 3 is amplified and processed into a high-frequency signal by the high-frequency module 4, so that the location of partial discharge of GIS equipment can be monitored more accurately.

[0033] In addition, based on the above structure, the portable GIS partial discharge status monitoring device of this embodiment further includes a single chip microcomputer module 6, such as Figure 4 As shown, the single-chip microcomputer module 6 includes a single-chip microcomputer and its peripheral circuits. The single-chip microcomputer adopts a STC15W4K56S4 / IAP15W4K58S4 type single-chip microcomputer. The input ends of the monitoring module 5, the high-frequency module 4 and the electric field sensor module 3 are electrically connected to the output end of the single-chip microcomputer. The monitoring module 5, the high-frequency module 4 and the electric field sensor module 3 are controlled by the single-chip microcomputer module 6. In the circuit, the single-chip microcomputer is represented by J24, the monitoring module 5 is represented by J1, the high-frequency module 4 is represented by J2, and the electric field sensor module 3 is represented by J3. The single-chip microcomputer module 6 is provided with a stable working voltage by the power supply VCC. The peripheral circuit of the single-chip microcomputer module 6 includes a crystal oscillator circuit and a reset circuit. The two pins of the crystal oscillator Q2 in the crystal oscillator circuit are respectively connected to the 13th pin P17 and the 12th pin P16 of the single-chip microcomputer; the two ends of the reset key RSTK of the reset circuit are respectively electrically connected to the power supply VCC and the pins of the single-chip microcomputer.

[0034] The single-chip microcomputer module 6 is also connected to a pull-up resistor Q5 , which has eight resistors. One end of the pull-up resistor Q5 is electrically connected to the power source VCC, and the other end is electrically connected to the input end of the single-chip microcomputer.

[0035] The single-chip computer module 6 is also connected to a temperature sensor Q6 and a buzzer H1. The output end of the temperature sensor Q6 is electrically connected to the input end of the single-chip computer. The temperature sensor Q6 uses a DS18B20 temperature sensor for monitoring temperature. The input end of the buzzer H1 is electrically connected to the output end of the single-chip computer. The buzzer H1 is used to sound an alarm.

Claims

1. A portable GIS partial discharge status monitoring device, characterized in that: It includes a box, a hand strap, an electric field sensor module, a high frequency module and a monitoring module; wherein, The box body is a hollow structure, and the hand strap is arranged on the top of the box body; The electric field sensor module is arranged on the surface of the box to detect the partial discharge signal of the GIS equipment; The input end of the high frequency device module is electrically connected to the output end of the electric field sensor module, and is used to receive the partial discharge signal and amplify and process the partial discharge signal into a high frequency signal; The monitoring module includes a signal processing module, a data acquisition module, a display module and a prompt module. The input end of the signal processing module is electrically connected to the output end of the high-frequency module, and is used to amplify, filter and denoise the high-frequency signal; the input end of the data acquisition module is electrically connected to the output end of the signal processing module, and is used to convert the high-frequency signal processed by the signal processing module into a digital signal; the display module and the prompt module are both arranged on the surface of the box, and the input end of the display module is electrically connected to the output end of the digital acquisition module, and is used to process and analyze the digital signal, and display the partial discharge status information of the GIS equipment and generate monitoring data; the input end of the prompt module is electrically connected to the output end of the display module, and is used to issue an abnormal alarm when the monitoring data exceeds the normal range.

2. The portable GIS partial discharge status monitoring device according to claim 1 is characterized in that: The high-frequency module includes a sealing box, a signal access hole, a sleeve, a spectrum expander, a thin iron sheet, a receiver and a signal outlet hole; the sealing box is arranged in a box body; the signal access hole is installed on one side of the sealing box, and its input end is located outside the sealing box, which is used to be electrically connected to the output end of the electric field sensor module, and its output end is located in the sealing box; the sleeve and the spectrum expander are arranged in the sealing box, and the two ends of the sleeve are respectively connected to the output end of the signal access hole and the input end of the spectrum expander; the signal outlet hole and the receiver are arranged on the other side of the sealing box relative to the signal access hole, the input end of the signal outlet hole is located in the sealing box, and the output end is located outside the sealing box, which is used to be electrically connected to the input end of the signal processing module; the output end of the receiver is connected to the input end of the signal outlet hole; the thin iron sheet is arranged between the output end of the spectrum expander and the input end of the receiver.

3. The portable GIS partial discharge status monitoring device according to claim 1 is characterized in that: A plurality of pulleys are arranged below the box body; a plurality of line inlet terminals are arranged on the surface of the box body, and heat dissipation blades are arranged on the surface of the box body.

4. The portable GIS partial discharge status monitoring device according to claim 1 is characterized in that: The display module includes a display screen arranged on the surface of the box; the data acquisition module includes a high-speed analog-to-digital converter.

5. The portable GIS partial discharge status monitoring device according to claim 1 is characterized in that: The prompt module includes a plurality of signal lights arranged on the surface of the box.

6. The portable GIS partial discharge status monitoring device according to claim 5 is characterized in that: There are six signal lights, namely a power light, a stop light, a start light, a fault light, a running light and a maintenance light.

7. The portable GIS partial discharge status monitoring device according to claim 1 is characterized in that: It also includes a single-chip microcomputer module; the single-chip microcomputer module includes a single-chip microcomputer and its peripheral circuits, and the input ends of the monitoring module, the high-frequency module and the electric field sensor module are electrically connected to the output end of the single-chip microcomputer.

8. The portable GIS partial discharge status monitoring device according to claim 7 is characterized in that: Also included is a temperature sensor electrically connected to the input terminal of the single chip microcomputer.

9. The portable GIS partial discharge status monitoring device according to claim 7 is characterized in that: The device also includes a buzzer electrically connected to the output terminal of the single chip computer.

10. The portable GIS partial discharge status monitoring device according to any one of claims 7 to 9, characterized in that: The single chip microcomputer adopts the STC15W4K56S4 / IAP15W4K58S4 type single chip microcomputer, and the electric field sensor module adopts the SDC-W01 type electric field sensor.

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