CN110794267A - Partial discharge fault detection system for GIS - Google Patents
Partial discharge fault detection system for GIS Download PDFInfo
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- CN110794267A CN110794267A CN201911068623.1A CN201911068623A CN110794267A CN 110794267 A CN110794267 A CN 110794267A CN 201911068623 A CN201911068623 A CN 201911068623A CN 110794267 A CN110794267 A CN 110794267A
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- partial discharge
- ultrahigh frequency
- monitoring device
- online monitoring
- signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a partial discharge fault detection system for a GIS, which comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a centralized unit and a PC (personal computer) terminal, wherein the partial discharge sensor is connected with the online monitoring device, and the online monitoring device is also connected with the PC terminal through the centralized unit. The ultrahigh frequency partial discharge sensor comprises a sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, and the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack. The pulse current generated by partial discharge in SF6 gas has high gradient, and the frequency of the generated electromagnetic transient can reach more than 1 GHz. The partial discharge can generate broadband electromagnetic transient and electromagnetic waves, partial discharge signal sensing can be carried out in different frequency bands, and ultrahigh frequency sensing (0.3-1.5 GHz) is adopted because an ultrahigh frequency sensing mode can obviously improve the anti-interference performance and realize accurate detection of partial discharge faults.
Description
Technical Field
The invention relates to the technical field of electrical detection, in particular to a GIS partial discharge fault detection system.
Background
The Gas Insulated metal enclosed type combined electrical apparatus (GIS for short) combines high voltage electric apparatus, takes the pressure sulfur hexafluoride Gas as the insulation and arc extinguishing medium, and is covered with the metal shell for sealing. GIS has many advantages, such as: the structure is compact, and the occupied area is small; the installation configuration is flexible and convenient, and the engineering construction period is short; simple maintenance, safe and reliable operation, long maintenance period, no external influence and the like. The insulation fault has the largest proportion in the GIS internal fault, and the important symptom and manifestation of the insulation fault is Partial Discharge (PD). With the development of antenna technology, researchers introduce fractal antennas into partial discharge detection, which also has a good effect, but despite the good performance of fractal antennas, fractal antennas also have many disadvantages: the bandwidth of the fundamental/low harmonic frequency is narrower; comparing and fixing adjacent frequencies; the fundamental harmonic gain is slightly lower; polarization purity is slightly low, and the fractal curve bends and twists to make the current direction inconsistent everywhere, so the electric field directivity becomes poor; less available fractal. Therefore, a method for detecting partial discharge faults of the GIS is extremely necessary.
Disclosure of Invention
The invention aims to provide a partial discharge fault detection system for a GIS.
The purpose of the invention is realized as follows:
a partial discharge fault detection system for a GIS is characterized in that: the ultrahigh frequency partial discharge online monitoring device comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a concentration unit and a PC (personal computer) terminal, wherein the ultrahigh frequency partial discharge sensor is connected with the ultrahigh frequency partial discharge online monitoring device, the ultrahigh frequency partial discharge online monitoring device is connected with the PC terminal through the concentration unit, the concentration unit is used for receiving signals from the ultrahigh frequency partial discharge online monitoring device and uploading the signals to the PC terminal, and the PC terminal is used for automatically generating three-dimensional spectrogram data and displaying the three-dimensional spectrogram data in real time.
As a further scheme of the invention: the ultrahigh frequency partial discharge sensor comprises a sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, wherein the sensor probe is used for capturing pulse signals serving as discharge statistical characteristics in real time and transmitting the pulse signals to the signal amplifier, the signal amplifier is used for amplifying the pulse signals captured by the sensor probe in real time and transmitting the pulse signals to the filter, the filter is used for shaping the amplified pulse signals and transmitting the pulse signals to the A/D converter, the A/D converter is used for converting the shaped signals into digital signals and transmitting the digital signals to the ultrahigh frequency partial discharge online monitoring device, and the power supply is used for supplying electric energy to the ultrahigh frequency partial discharge sensor to ensure the ultrahigh frequency partial discharge sensor to work normally.
As a further scheme of the invention: the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack, wherein the data processing center judges the shaped digital signals sent by an A/D converter to realize real-time alarm and automatic diagnosis of the partial discharge signals, the antenna is used for wirelessly transmitting fault signals to a centralized unit, and the storage battery pack is used for ensuring the normal work of the ultrahigh frequency partial discharge online monitoring device.
As a further scheme of the invention: and the PC end is provided with a liquid crystal touch display.
As a further scheme of the invention: the sensor probe adopts an ultrahigh frequency sensor probe.
As a further scheme of the invention: the antenna adopts an antenna array.
As a further scheme of the invention: the storage battery pack adopts a lithium battery.
Compared with the prior art, the invention has the beneficial effects that: the pulse current generated by partial discharge in SF6 gas has high gradient, and the frequency of the generated electromagnetic transient can reach more than 1 GHz. The partial discharge can generate broadband electromagnetic transient and electromagnetic waves, partial discharge signal sensing can be carried out in different frequency bands, and ultrahigh frequency sensing (0.3-1.5 GHz) is adopted because an ultrahigh frequency sensing mode can obviously improve the anti-interference performance and realize accurate detection of partial discharge faults.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings.
Example 1:
referring to fig. 1, a detecting system for GIS partial discharge fault, the GIS device uses a basin-type insulator, including an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge on-line monitoring device, a centralized unit and a PC terminal, the ultrahigh frequency partial discharge sensor includes an ultrahigh frequency sensor probe, a signal amplifier, a filter, an a/D converter and a power supply, the ultrahigh frequency sensor probe is used to capture pulse signals as discharge statistical characteristics in real time and transmit them to the signal amplifier, the signal amplifier is used to amplify the pulse signals captured by the sensor probe in real time and transmit them to the filter, the filter is used to filter interference signals in the received amplified signals, and reshape the amplified pulse signals and transmit them to the a/D converter, the a/D converter is used to convert the reshaped signals into digital signals, the power supply is used for providing electric energy for the ultrahigh frequency partial discharge sensor so as to ensure the normal work of the ultrahigh frequency partial discharge sensor;
the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack, wherein the data processing center judges the shaped digital signals transmitted by an A/D converter to realize real-time alarm and automatic diagnosis of the partial discharge signals, the antenna is used for wirelessly transmitting fault signals to a central unit, the central unit is used for receiving the signals from the ultrahigh frequency partial discharge online monitoring device and uploading the signals to a PC (personal computer) end, and the PC end is used for automatically generating three-dimensional spectrogram data and displaying the three-dimensional spectrogram data in real time. The storage battery pack is used for ensuring the normal work of the ultrahigh frequency partial discharge on-line monitoring device.
Example 2:
on the basis of the embodiment 1, the PC end is provided with the liquid crystal touch display, so that various data can be checked through a touch function, and the operation is convenient.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A partial discharge fault detection system for a GIS is characterized in that: the ultrahigh frequency partial discharge online monitoring device comprises an ultrahigh frequency partial discharge sensor, an ultrahigh frequency partial discharge online monitoring device, a concentration unit and a PC (personal computer) terminal, wherein the ultrahigh frequency partial discharge sensor is connected with the ultrahigh frequency partial discharge online monitoring device, the ultrahigh frequency partial discharge online monitoring device is connected with the PC terminal through the concentration unit, the concentration unit is used for receiving signals from the ultrahigh frequency partial discharge online monitoring device and uploading the signals to the PC terminal, and the PC terminal is used for automatically generating three-dimensional spectrogram data and displaying the three-dimensional spectrogram data in real time.
2. The system for GIS partial discharge fault detection according to claim 1, wherein: the ultrahigh frequency partial discharge sensor comprises a sensor probe, a signal amplifier, a filter, an A/D converter and a power supply, wherein the sensor probe is used for capturing pulse signals serving as discharge statistical characteristics in real time and transmitting the pulse signals to the signal amplifier, the signal amplifier is used for amplifying the pulse signals captured by the sensor probe in real time and transmitting the pulse signals to the filter, the filter is used for shaping the amplified pulse signals and transmitting the pulse signals to the A/D converter, the A/D converter is used for converting the shaped signals into digital signals and transmitting the digital signals to the ultrahigh frequency partial discharge online monitoring device, and the power supply is used for supplying electric energy to the ultrahigh frequency partial discharge sensor to ensure the ultrahigh frequency partial discharge sensor to work normally.
3. The system for GIS partial discharge fault detection according to claim 2, wherein: the sensor probe adopts an ultrahigh frequency sensor probe.
4. The system for GIS partial discharge fault detection according to claim 1, wherein: the ultrahigh frequency partial discharge online monitoring device comprises a data processing center, an antenna and a storage battery pack, wherein the data processing center judges the shaped digital signals sent by an A/D converter to realize real-time alarm and automatic diagnosis of the partial discharge signals, the antenna is used for wirelessly transmitting fault signals to a centralized unit, and the storage battery pack is used for ensuring the normal work of the ultrahigh frequency partial discharge online monitoring device.
5. The system for GIS partial discharge fault detection according to claim 4, wherein: the antenna adopts an antenna array.
6. The system for GIS partial discharge fault detection according to claim 1, wherein: and the PC end is provided with a liquid crystal touch display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911068623.1A CN110794267A (en) | 2019-11-05 | 2019-11-05 | Partial discharge fault detection system for GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911068623.1A CN110794267A (en) | 2019-11-05 | 2019-11-05 | Partial discharge fault detection system for GIS |
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| Publication Number | Publication Date |
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| CN110794267A true CN110794267A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911068623.1A Pending CN110794267A (en) | 2019-11-05 | 2019-11-05 | Partial discharge fault detection system for GIS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116993328A (en) * | 2023-09-26 | 2023-11-03 | 国网湖北省电力有限公司超高压公司 | Operation and maintenance method and device for power system equipment combined with SF6 gas monitoring |
-
2019
- 2019-11-05 CN CN201911068623.1A patent/CN110794267A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116993328A (en) * | 2023-09-26 | 2023-11-03 | 国网湖北省电力有限公司超高压公司 | Operation and maintenance method and device for power system equipment combined with SF6 gas monitoring |
| CN116993328B (en) * | 2023-09-26 | 2023-12-22 | 国网湖北省电力有限公司超高压公司 | Operation and maintenance method and device for power system equipment combined with SF6 gas monitoring |
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Application publication date: 20200214 |
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| WD01 | Invention patent application deemed withdrawn after publication |