GIS combined electric appliance fault type detection device based on TRPD signal

Abstract

The invention discloses a GIS combined electric appliance fault type detection device based on a TRPD signal. The GIS combined electric appliance fault type detection device comprises a TRPD signal ultrahigh frequency sensor, an analog-to-digital conversion module, a single-chip microcomputer module, a display module, an alarm module and a power supply module. Wherein the TRPD signal ultrahigh frequency sensor is arranged on a shell of the GIS electric appliance and is used for detecting a TRPD signal generated by partial discharge in the GIS electric appliance; the input end of the analog-to-digital conversion module is electrically connected with the output end of the TRPD signal ultrahigh-frequency sensor, and the analog-to-digital conversion module is used for converting a detection signal output by the TRPD signal ultrahigh-frequency sensor into a digital signal and generating acquisition data; the input end of the single-chip microcomputer module is electrically connected with the output end of the analog-to-digital conversion module, and the single-chip microcomputer module is used for analyzing the collected data and judging the fault type of partial discharge of the GIS electric appliance. The input end of the display module is electrically connected with the output end of the single-chip microcomputer module. According to the invention, based on the TRPD signal detection technology, the sensitivity and accuracy of GIS combined electric appliance fault type detection are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of GIS equipment fault detection, and in particular relates to a GIS combined electrical appliance fault type detection device based on TRPD signals. Background Art

[0002] With the rapid development of electronic technology, TRPD signals have been widely used in many fields such as communications, industrial control, and power systems. However, due to factors such as complex working environments, aging caused by long-term operation of equipment, and unforeseen external interference, TRPD signals are prone to abnormalities. When facing these problems, current detection methods often show defects such as insufficient detection accuracy, slow response speed, and inability to accurately identify a variety of fault types. This not only affects the normal operation of the system, but may also cause serious production accidents or data transmission errors.

[0003] TRPD (Time-Resolved Partial Discharge) signal detection is a partial discharge detection technology that identifies insulation defects in power equipment by analyzing the distribution of partial discharge events over time. A patented technology provides a partial discharge detection method that can realize PRPD (Phase Resolved Partial Discharge) and TRPD spectra, which shows that TRPD technology is applied to insulation monitoring and diagnosis of high-voltage power equipment. This method uses a digital storage oscilloscope and a virtual instrument data processing module on a computer to detect partial discharge signals of various power equipment, including a peak detection mode for PRPD partial discharge spectra and a fast frame segmented storage mode for TRPD partial discharge spectra. This information shows that TRPD signal technology plays an important role in partial discharge detection and insulation status assessment of power equipment, and is combined with a variety of data processing and pattern recognition technologies to improve the accuracy and efficiency of detection.

[0004] GIS equipment fault types include partial discharge faults, for example, 1. Discharge in the air gap inside the insulation: the small air gaps existing in the insulation material inside the GIS may cause discharge due to the concentration of the electric field. 2. Surface discharge: occurs on the surface of the insulator, usually due to surface contamination, moisture or uneven electric field. 3. Tip discharge: the electric field strength is extremely high at the tip or sharp part of the conductor, which can easily cause partial discharge. 4. Conductor poor contact fault: loose conductor connection and insufficient contact pressure lead to increased contact resistance, overheating and discharge. 5. Insulation aging fault: after long-term operation, the performance of the insulation parts decreases, and local degradation and discharge may occur. 6. Foreign matter intrusion fault: foreign matter such as metal particles and dust from the outside enters the GIS, causing electric field distortion and leading to partial discharge. 7. Mechanical fault: operating mechanism failure, seal damage, etc. may indirectly affect the electric field distribution and cause abnormal TRPD signals. 8. Gas leakage fault: when the insulating gas inside the GIS leaks, the gas pressure decreases, the insulation performance decreases, and discharge may occur.

[0005] The existing GIS fault type detection devices are large in size and heavy in weight, and the detection sensitivity is insufficient. Some weak fault signals may not be effectively detected, resulting in the omission of faults. The anti-interference ability is weak and is easily affected by external electromagnetic interference, environmental noise and other factors, thereby interfering with the accurate judgment of fault signals. The limited detection range may only detect faults of specific types or specific parts, and there are blind spots for the comprehensive detection of the entire GIS system. It cannot cover complex structures and diverse operating conditions. The real-time performance is not enough. The speed of data collection and analysis is slow, and it cannot reflect the real-time operating status and fault conditions of the equipment in a timely manner. The accuracy of diagnostic results needs to be improved. Relying solely on a single detection technology or limited characteristic parameters may lead to low accuracy of fault diagnosis. It is difficult to make accurate distinctions for some similar fault types. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a GIS combined electrical appliance fault type detection device based on TRPD signals, and based on TRPD signal detection technology, improve the sensitivity and accuracy of GIS combined electrical appliance fault type detection.

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

[0008] A GIS combined electrical appliance fault type detection device based on TRPD signal comprises a TRPD signal ultra-high frequency sensor, an analog-to-digital conversion module, a single-chip module, a display module, an alarm module and a power module; wherein the TRPD signal ultra-high frequency sensor is installed on the shell of the GIS electrical appliance and is used to detect the TRPD signal generated by the partial discharge inside the GIS electrical appliance; the input end of the analog-to-digital conversion module is electrically connected to the output end of the TRPD signal ultra-high frequency sensor and is used to convert the detection signal output by the TRPD signal ultra-high frequency sensor into a digital signal and generate collected data; the input end of the single-chip module is electrically connected to the output end of the analog-to-digital conversion module and is used to analyze the collected data and determine the fault type of the partial discharge of the GIS electrical appliance; the input end of the display module is electrically connected to the output end of the single-chip module and the display module is used to display the data analysis result of the single-chip module and display the fault type of the partial discharge of the GIS electrical appliance; the input end of the alarm module is electrically connected to the output end of the single-chip module and the alarm module is used to sound an alarm when the single-chip module detects a fault; the power module is used to provide a working voltage.

[0009] Furthermore, the TRPD signal ultra-high frequency sensor includes a shell, a signal input port, a sleeve, a patch antenna, a signal amplifier, a sensitive element, a filter, a detector and a signal output port; wherein the shell is a hollow columnar structure, one end of the sleeve extends into the shell from one end of the shell, and the other end of the sleeve is located outside the shell and connected to the signal input port; the patch antenna is arranged on the side wall inside the sleeve; the input end of the signal amplifier is connected to the end of the sleeve located inside the shell; the filter is arranged at the other end of the shell relative to the signal amplifier; the sensitive element is arranged between the signal amplifier and the filter; the input end of the detector is electrically connected to the output end of the filter, the output end of the detector is connected to the signal output port, and the signal output port is located outside the shell.

[0010] The GIS combined electrical appliance fault type detection device based on TRPD signal provided by the present invention has the following beneficial effects:

[0011] By installing a TRPD signal ultra-high frequency sensor on the casing of a GIS appliance to detect the TRPD signal generated by partial discharge inside the GIS appliance, the detection signal is converted into a digital signal by an analog-to-digital conversion module to generate acquisition data, which is sent to the single-chip microcomputer module. The single-chip microcomputer module uses spectrum analysis methods such as fast Fourier transform and combines the structure and operating parameters of the GIS appliance to perform data analysis, and quickly and accurately determine the common partial discharge fault types of GIS appliances (including bubbles and cracks in insulating materials; air gaps and voids inside impurities, etc.). The data analysis results and fault types are displayed through the display module, which is convenient for operators to view the data intuitively. At the same time, when a fault is detected, the single-chip microcomputer module controls the alarm module to sound an alarm to remind maintenance personnel to deal with it in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a principle block diagram of an embodiment of the present invention.

[0013] Figure 2 It is a circuit connection diagram of the single chip microcomputer module and the TRPD signal ultra-high frequency sensor, analog-to-digital conversion module, alarm module, temperature sensor and fan according to an embodiment of the present invention.

[0014] Figure 3 4 is a circuit connection diagram of a display module according to an embodiment of the present invention.

[0015] Figure 4 Schematic diagram of the structure of the TRPD signal ultra-high frequency sensor according to an embodiment of the present invention.

[0016] Figure 5 It is a schematic structural diagram of a box body according to an embodiment of the present invention.

[0017] The numbers in the figure are: 1. TRPD signal ultra-high frequency sensor; 11. housing; 12. signal input port; 13. casing; 14. patch antenna; 15. signal amplifier; 16. sensitive element; 17. filter; 18. detector; 19. signal output port; 2. analog-to-digital conversion module; 3. single-chip computer module; 4. display module; 5. alarm module; 6. power module; 7. box; 71. operation panel; 72. box cover; 73. buckle; 74. data access port; 75. data output port; 76. power input interface; 77. equipment grounding terminal; 78. vent; 79. temperature sensor; 710. fan; 711. hand strap. DETAILED DESCRIPTION

[0018] The present invention is described below in conjunction with the accompanying drawings. The specific implementation methods described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solution of the present invention by ordinary technicians in this field should fall within the protection scope of the present invention.

[0019] like Figures 1 to 5 As shown, the GIS combination electrical appliance fault type detection device based on TRPD signal of this embodiment includes a TRPD signal ultra-high frequency sensor 1, an analog-to-digital conversion module 2, a single-chip computer module 3, a display module 4, an alarm module 5 and a power supply module 6.

[0020] The TRPD signal ultra-high frequency sensor 1 is installed on the housing of the GIS electrical appliance to detect the TRPD signal generated by the partial discharge inside the GIS electrical appliance. The TRPD signal ultra-high frequency sensor 1 of this embodiment includes a housing 11, a signal input port 12, a sleeve 13, a patch antenna 14, a signal amplifier 15, a sensitive element 16, a filter 17, a detector 18 and a signal output port 19. The housing 11 is a hollow columnar structure, one end of the sleeve 12 extends into the housing 11 from one end of the housing 11, and the other end of the sleeve 12 is located outside the housing 11 and connected to the signal input port; the patch antenna 14 is arranged on the side wall inside the sleeve 13; the input end of the signal amplifier 15 is connected to the end of the sleeve 13 located inside the housing 11; the filter 17 is arranged at the other end of the housing 11 relative to the signal amplifier 15; the sensitive element 16 is arranged between the signal amplifier 15 and the filter 17; the input end of the detector 18 is electrically connected to the output end of the filter 17, and the output end of the detector 18 is connected to the signal output port 19, and the signal output port 19 is located outside the housing 11.

[0021] The functions of the components of the TRPD signal ultra-high frequency sensor 1 are as follows: the signal input port 12 uses a high-performance coaxial connector to ensure the stability and low loss of the input signal, and is used to input the TRPD signal. The sleeve 13 uses a material that is resistant to high temperatures and has good insulation properties to provide effective protection and isolation for the internal components. The patch antenna 14 has the characteristics of high gain and wide bandwidth, and can effectively receive external TRPD signals. The signal amplifier 15 uses a low-noise, high-gain amplifier chip to amplify the input weak signal. The sensitive element 16 is used to sense the changes in physical quantities related to the fault in the amplified signal, such as the electric field strength, and convert these physical quantities into electrical signals. The filter 17 screens the electrical signal, and filters and removes noise from the electrical signal through a circuit composed of components such as inductors and capacitors. The detector 18 is used to convert the electrical signal processed by the filter from an AC signal to a DC signal, and the final processed detection signal is output by the signal output port. A wire can be set at the signal input port 19 for electrical connection to the output end of the detector 18.

[0022] The input end of the analog-to-digital conversion module 2 is electrically connected to the output end of the TRPD signal ultra-high frequency sensor 1, and is used to convert the detection signal output by the TRPD signal ultra-high frequency sensor 1 into a digital signal and generate collected data. The analog-to-digital conversion module 2 of this embodiment adopts the AD9280 chip.

[0023] The input end of the single-chip computer module 3 is electrically connected to the output end of the analog-to-digital conversion module 2, and is used to analyze and collect data and determine the fault type of partial discharge of the GIS electrical appliance. The single-chip computer module 3 of this embodiment adopts the STM32F407 single-chip computer, which has built-in spectrum analysis methods such as fast Fourier transform and algorithms such as wavelet transform, and also stores the structural characteristics and operating parameters of the GIS electrical appliance.

[0024] The input end of the display module 4 is electrically connected to the output end of the single-chip module 3. The display module 4 is used to display the data analysis results of the single-chip module 3 and the fault type of partial discharge of the GIS electrical appliance.

[0025] The input end of the alarm module 5 is electrically connected to the output end of the single chip computer module. The alarm module 5 is used to issue an alarm when the single chip computer module 3 detects a fault.

[0026] The power module 6 is used to provide working voltage.

[0027] In addition to the above structure, the GIS combination electrical appliance fault type detection device based on TRPD signal of this embodiment also includes a box body 7, an operation panel 71 is arranged on the upper surface of the box body 7, and a box cover 72 is arranged above the operation panel 71. One end of the box cover 72 is hinged to the side wall of the box body 7, and the other end is connected to the side wall of the box body 7 by a buckle 73. The buckle 73 can ensure the airtightness and stability of the box cover 72 when it is closed.

[0028] The single chip computer module 3 , the digital-to-analog conversion module 2 and the power supply module 7 are arranged in the box body 7 .

[0029] The display module 4 includes a display screen arranged on the operation panel 71, and the display screen can display data in real time.

[0030] The alarm module 5 includes a speaker and a signal light arranged on the operation panel 71. The signal light intuitively conveys the working status information of the device to the operator through a combination of different colors (such as green for normal operation, red for fault, and yellow for standby or warning) and flashing modes (such as always on, slow flashing, and fast flashing).

[0031] The operation panel 71 of the box 7 is provided with a data access port 74, a data output port 75, a power input port 76 and a device grounding terminal 77, wherein the data access port 74 is used to facilitate the connection between the TRPD signal ultra-high frequency sensor 1 and the single-chip module 3 through a wire, and the data output port 75 is used to connect other devices, so as to facilitate the sending of the data processed by the single-chip module 3 to the monitoring center, so as to realize data sharing and collaborative work. The power input port 76 is used to connect the power cord to facilitate charging the power module 6. The device grounding terminal 77 provides a stable reference potential for the device through a good connection with the earth, effectively eliminates static electricity accumulation and common mode interference, and ensures the accuracy of the signal and the safety of the device.

[0032] The side wall of the box 7 is provided with a hand strap 711 and a vent 78. The hand strap 711 is convenient for the operator to carry the device, and the vent 78 is used for heat dissipation. A temperature sensor 79 and a fan 710 are also provided in the box 7. The output end of the temperature sensor 79 is electrically connected to the input end of the single-chip module 3, and the input end of the fan 710 is electrically connected to the output end of the single-chip module 3. When the temperature sensor 79 detects that the temperature in the box 7 is too high, the single-chip module 3 will control the fan 710 to work to achieve the purpose of heat dissipation. The temperature sensor 79 of this embodiment is a DS18B20 temperature sensor.

[0033] like Figure 2 and Figure 3 As shown, in the circuit, the STM32F407 single chip is represented by U5, and the STM32F407 single chip is connected to the crystal oscillator circuit Q2, the reset circuit Q4, the touch circuit Q6 and the pull-up resistor Q5. The TRPD signal ultra-high frequency sensor 1 is represented by U1, the display module 4 is represented by U2, the temperature sensor 79 is represented by U3, the analog-to-digital conversion module 2 is represented by U4, the speaker is represented by SPEAK, the signal light is represented by D1, and the fan 710 is represented by M.

[0034] The GIS combined electrical appliance fault type detection device based on TRPD signal of this embodiment, when in use, first installs the TRPD signal ultra-high frequency sensor 1 on the shell of the GIS electrical appliance to detect the TRPD signal generated by the partial discharge inside the GIS electrical appliance. After the TRPD signal is amplified, filtered, and converted into AC / DC signals in the TRPD signal ultra-high frequency sensor 1, it is converted into a digital signal by the analog-to-digital conversion module 2, and the collected data is generated. The collected data is sent to the single-chip computer module 3. The single-chip computer module 3 uses spectrum analysis methods such as fast Fourier transform and combines the structure and operation parameters of the GIS electrical appliance to perform data analysis, and quickly and accurately judges the common partial discharge fault types of the GIS electrical appliance (including bubbles and cracks in the insulating material; air gaps and cavities inside the impurities, etc.). The data analysis results and fault types are displayed by the display module 4, which is convenient for the operator to view the data intuitively. At the same time, when a fault is detected, the single-chip computer module 3 controls the alarm module 5 to sound an alarm (the signal light flashes and the speaker sounds an alarm) to remind the maintenance personnel to deal with it in time.

Claims

1. A GIS combination electrical appliance fault type detection device based on TRPD signal, characterized in that: It includes a TRPD signal ultra-high frequency sensor, an analog-to-digital conversion module, a single-chip microcomputer module, a display module, an alarm module and a power supply module; among which, TRPD signal UHF sensor is installed on the shell of GIS electrical appliances to detect TRPD signals generated by partial discharge inside GIS electrical appliances; The input end of the analog-to-digital conversion module is electrically connected to the output end of the TRPD signal ultra-high frequency sensor, and is used to convert the detection signal output by the TRPD signal ultra-high frequency sensor into a digital signal and generate acquisition data; The input end of the single-chip computer module is electrically connected to the output end of the analog-to-digital conversion module, and is used to analyze the collected data and determine the fault type of partial discharge of the GIS electrical appliance; The input end of the display module is electrically connected to the output end of the single-chip computer module. The display module is used to display the data analysis results of the single-chip computer module and the fault type of partial discharge of the GIS electrical appliance; The input end of the alarm module is electrically connected to the output end of the single-chip computer module, and the alarm module is used to sound an alarm when the single-chip computer module detects a fault; The power module is used to provide operating voltage.

2. The GIS combination electrical appliance fault type detection device based on TRPD signal according to claim 1 is characterized in that: The TRPD signal ultra-high frequency sensor includes a shell, a signal input port, a sleeve, a patch antenna, a signal amplifier, a sensitive element, a filter, a detector and a signal output port; wherein the shell is a hollow columnar structure, one end of the sleeve extends into the shell from one end of the shell, and the other end of the sleeve is located outside the shell and connected to the signal input port; the patch antenna is arranged on the side wall inside the sleeve; the input end of the signal amplifier is connected to the end of the sleeve located inside the shell; the filter is arranged at the other end of the shell relative to the signal amplifier; the sensitive element is arranged between the signal amplifier and the filter; the input end of the detector is electrically connected to the output end of the filter, the output end of the detector is connected to the signal output port, and the signal output port is located outside the shell.

3. The GIS combination electrical appliance fault type detection device based on TRPD signal according to claim 1 is characterized in that: It also includes a box body; an operation panel is arranged on the upper surface of the box body, and a box cover is arranged above the operation panel; one end of the box cover is hinged to the side wall of the box body, and the other end is connected to the side wall of the box body by a buckle; the single-chip computer module, the digital-to-analog conversion module and the power supply module are arranged in the box body; the display module includes a display screen arranged on the operation panel; the alarm module includes a speaker and a signal light arranged on the operation panel.

4. The GIS combination electrical appliance fault type detection device based on TRPD signal according to claim 3 is characterized in that: The operation panel of the box is provided with a data access port, a data output port, a power input interface and an equipment grounding terminal; the side wall of the box is provided with a hand strap and a vent.

5. The GIS combination electrical appliance fault type detection device based on TRPD signal according to claim 4 is characterized in that: A temperature sensor and a fan are also provided in the box. The output end of the temperature sensor is electrically connected to the input end of the single-chip microcomputer module, and the input end of the fan is electrically connected to the output end of the single-chip microcomputer module.

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