CN216526092U - Fault detection equipment for gas insulated totally-enclosed combined electrical apparatus - Google Patents
Fault detection equipment for gas insulated totally-enclosed combined electrical apparatus Download PDFInfo
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- CN216526092U CN216526092U CN202122985362.9U CN202122985362U CN216526092U CN 216526092 U CN216526092 U CN 216526092U CN 202122985362 U CN202122985362 U CN 202122985362U CN 216526092 U CN216526092 U CN 216526092U
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Abstract
The utility model provides a fault detection device for a gas insulated totally-enclosed combined electrical apparatus, which comprises: the gas insulated fully-closed combined electrical appliance comprises a sensing optical fiber (1) outside a gas insulated fully-closed combined electrical appliance shell, a laser (2), an AOM acousto-optic modulator (3), an EDFA amplifier (4), a circulator (5), a coupler (6), a photoelectric converter (7), an ADC (analog-to-digital converter) (8) and a data processing module (9) which are sequentially connected. The fault detection equipment for the gas insulated totally-enclosed combined electrical apparatus only needs to wind one optical cable outside a GIS enclosed metal shell, does not need any electronic device in a field, does not have the problem of data transmission, has the advantages of no electromagnetic interference influence, no transmission signal limitation, convenient and visual real-time observation outside the field and the like, and brings great reliability and convenience for quickly and effectively positioning the GIS equipment with breakdown fault.
Description
Technical Field
The utility model belongs to the technical field of equipment detection, and particularly relates to fault detection equipment for a gas insulated fully-closed combined electrical appliance.
Background
GIS (gas Insulated switchgear) is a short term for gas Insulated totally enclosed switchgear. The GIS is composed of all devices except a transformer in a transformer substation, including a circuit breaker, a disconnecting switch, a grounding switch, a voltage transformer, a current transformer, a lightning arrester, a bus, a cable terminal, an inlet and outlet bushing and the like, wherein the devices or parts are all sealed in a metal grounded shell, and SF6 insulating gas with certain pressure is filled in the metal grounded shell, so the GIS is also called as an SF6 totally-enclosed combined electrical appliance. The GIS system has the advantages of compact structure, small occupied area, high reliability, flexible configuration, convenience in installation, high safety and strong environment adaptability, and is widely applied to the fields of high voltage, ultrahigh voltage and extra-high voltage.
According to the requirements of the field voltage withstand and insulation test guide of gas insulated metal enclosed switchgear (DL/T555-2004), the GIS new installation part, the extension part and the disassembly maintenance part are required to be subjected to insulation voltage withstand tests. Because the GIS equipment is completely enclosed in the metal-grounded shell, once equipment or component failure occurs during the insulation withstand voltage test, how to quickly and effectively locate the failed equipment is a problem to be solved. However, in the process of performing an insulation withstand voltage test on a GIS system, all GIS devices are enclosed in a metal-grounded shell, and in addition, the field is in a high-voltage state, and various electromagnetic environments are complex, so that a common electronic sensor system is easily interfered, is unstable in work, and is difficult to monitor in real time outside the field.
Meanwhile, in the daily operation and maintenance process of the GIS system, all GIS equipment is sealed in a metal grounded shell, once breakdown fault occurs to certain equipment, the outside can feel huge sound and vibration, and other effective information is difficult to obtain. In the daily operation process, once equipment or part faults occur, how to quickly and effectively locate the equipment with the faults is an urgent problem to be solved. In addition, if a certain means can predict and give an early warning before the GIS equipment finally breaks down, great significance and influence can be brought to GIS system maintenance work, and passive waiting equipment faults in GIS system maintenance engineering can be changed into active discovery and timely scheduling, so that power utilization risks are avoided.
Therefore, the method has great economic and social benefits no matter how to quickly and effectively position the equipment with breakdown faults after the breakdown faults of the GIS equipment occur in the insulation and voltage resistance test before the power supply of the GIS system or in the daily operation process. However, due to the high voltage state on site and the complex electromagnetic environment, various electronic instruments for monitoring sound and vibration by adopting the conventional monitoring means usually have various problems and have unsatisfactory use effect.
SUMMERY OF THE UTILITY MODEL
The technical problem is as follows: the utility model provides a fault detection device for a gas insulated fully-closed combined electrical appliance, aiming at solving the problem of quickly and effectively positioning equipment with breakdown faults after the breakdown faults of GIS equipment occur in the processes of insulation and voltage withstand test before power supply and daily operation.
The technical scheme is as follows: the utility model provides a fault detection device for a gas insulated totally-enclosed combined electrical apparatus, which comprises: the gas insulated totally-enclosed combined electrical apparatus comprises a sensing optical fiber (1) outside a gas insulated totally-enclosed combined electrical apparatus shell, a laser (2), an AOM acousto-optic modulator (3), an EDFA amplifier (4), a circulator (5), and a coupler (6), a photoelectric converter (7), an ADC (analog-to-digital converter) (8) and a data processing module (9) which are sequentially connected.
Preferably, the laser (2) is used for emitting laser to the AOM acousto-optic modulator (3), the AOM acousto-optic modulator (3) is used for modulating the laser and dividing the laser into two laser pulses with two different frequencies and a fixed time interval, the EDFA amplifier (4) is used for amplifying the two laser pulses with two different frequencies and a fixed time interval and inputting the two laser pulses to the sensing fiber (1); the coupler (6) is used for receiving two bundles of reverse Rayleigh scattering signals formed in the sensing optical fiber (1) and coupling the two bundles of reverse Rayleigh scattering signals to generate an interference effect, the photoelectric converter (7) is used for converting the interfered reverse Rayleigh scattering signals into electric signals, the ADC (analog-to-digital converter) (8) is used for converting the electric signals into digital signals, and the data processing module (9) is used for processing the digital signals and monitoring whether faults occur.
Has the advantages that: the fault detection equipment for the gas insulated fully-enclosed combined electrical appliance only needs to wind one optical cable outside the GIS enclosed metal shell, does not need any electronic device in the field, does not have the problem of data transmission, has the advantages of no electromagnetic interference influence, no limitation of transmission signals, convenient and visual field real-time observation, and the like, and brings great reliability and convenience for quickly and effectively positioning the GIS equipment with breakdown fault.
Drawings
Fig. 1 is a schematic structural diagram of a fault detection device of a gas insulated fully-closed combined electrical appliance.
Detailed Description
The present invention is further explained below.
The fault detection equipment for the gas insulated totally-enclosed combined electrical apparatus comprises a sensing optical fiber (1) outside a shell of the gas insulated totally-enclosed combined electrical apparatus, a laser (2), an AOM acousto-optic modulator (3), an EDFA amplifier (4), a circulator (5), a coupler (6), a photoelectric converter (7), an ADC (analog-to-digital converter) (8) and a data processing module (9) which are connected in sequence; the laser (2) is used for emitting laser to the AOM acousto-optic modulator (3), the AOM acousto-optic modulator (3) is used for modulating the laser and forming two laser pulses with two different frequencies and a fixed time interval, and the EDFA amplifier (4) is used for amplifying the two laser pulses with two different frequencies and a fixed time interval and inputting the two laser pulses to the sensing optical fiber (1); the coupler (6) is used for receiving two bundles of reverse Rayleigh scattering signals formed in the sensing optical fiber (1) and coupling the two bundles of reverse Rayleigh scattering signals to generate an interference effect, the photoelectric converter (7) is used for converting the interfered reverse Rayleigh scattering signals into electric signals, the ADC (analog-to-digital converter) (8) is used for converting the electric signals into digital signals, and the data processing module (9) is used for processing the digital signals and monitoring whether faults occur.
The part types and sources used in the apparatus are:
sensing optical fiber (1)
The model is as follows: TotalPlay-G.657B3
The supplier: nanjing Huaxin Tencang optical communication Co Ltd
Laser (2)
The model is as follows: 800834
The supplier: RIO Laser
AOM acousto-optic modulator (3)
The model is as follows: 30196701
The supplier: gooch & Housego Ltd
EDFA amplifier (4)
The model is as follows: JAOC-EDFA-FG-15C21
The supplier: AOC Technologies, Inc.
Circulator (5)
The model is as follows: CIR-P110L11
The supplier: shandong Rui opto-electronic technology Co Ltd
Coupler (6)
The model is as follows: WBC-1550nm-1 x 2-3 x 54-0.9
The supplier: shandong Rui opto-electronic technology Co Ltd
Photoelectric converter (7)
The model is as follows: LDPF 0120
The supplier: OSI LaserDiode, Inc.
ADC analog-to-digital converter (8)
The model is as follows: AD9253
The supplier: analog devices, Inc.
Data processing module (9)
The model is as follows: TMS320C6678
The supplier: texas instruments TI
By utilizing the equipment, the fault detection of the gas insulated totally-enclosed combined electrical apparatus comprises the following steps:
(1) arranging the sensing optical fiber outside the shell along the length direction of the shell of the gas insulated totally-enclosed combined electrical appliance;
(2) the gas insulated totally-enclosed combined electrical apparatus is divided into a plurality of sections according to a certain distance, and a vibration signal in each section of the gas insulated totally-enclosed combined electrical apparatus is simultaneously monitored by using a sensing optical fiber, so that whether a fault exists in the section of the gas insulated totally-enclosed combined electrical apparatus or not and the section with the fault exists in the section of the gas insulated totally-enclosed combined electrical apparatus are judged.
For a GIS substation, the total length of the metal-grounded enclosure will typically not exceed 5 km. For the application scenario of the 5 km-length optical cable, the currently mature DAS system can divide the 5 km-length optical cable into 5000 segments, each segment is 1 meter, and can simultaneously monitor the vibration signals received by the 5000 segments of the 1-meter-length optical cable and present the vibration signals in real time. If we lay the optical cable along the outer surface of the metal grounded shell, and feel the vibration (sound) signal sent by the internal GIS equipment through the optical cable coupled on the metal shell, we can simultaneously monitor the vibration signal of the optical cable along the 1 meter long section. And the real-time display can be realized through monitoring equipment outside the field, and whether a fault exists or not and the fault position can be judged.
A5 km length of cable was used, with each 1 meter length of cable being treated as a sound (vibration) sensor. If the 5km optical cable is wound outside the GIS closed metal shell, the equivalent is that 5000 receivers (channels) are uniformly distributed on the GIS closed metal shell along the pipeline direction. And winding the sensing optical cable outside the GIS closed metal shell. The system adopts a high-performance embedded system, can simultaneously monitor the sound signals of the 5000 channels and transmits the demodulated sound signals to the background server in real time. The frequency characteristic of the system for monitoring 5000 channel signals (with the sampling rate of 2500Hz) in real time aiming at an optical cable with the length of 5km is 1Hz-1250 Hz. If a 2.5km long optical cable is used, the frequency characteristic of the real-time monitoring signal (sampling rate 5000Hz) is 1Hz-2500 Hz. Can satisfy GIS equipment and pass through the discernment demand that seals metal casing transmitted external sound signal characteristic. And the real-time display can be realized through monitoring equipment outside the field, and whether a fault exists or not and the fault position can be judged.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (2)
1. The utility model provides a totally closed combined electrical apparatus fault detection equipment of gas insulation which characterized in that: the method comprises the following steps: the gas insulated fully-closed combined electrical apparatus comprises a sensing optical fiber (1) outside a gas insulated fully-closed combined electrical apparatus shell, a laser (2), an AOM acousto-optic modulator (3), an EDFA amplifier (4), a circulator (5), a coupler (6), a photoelectric converter (7), an ADC (analog-to-digital converter) (8) and a data processing module (9) which are sequentially connected.
2. The fault detection device of the gas insulated fully-closed combined electrical apparatus according to claim 1, characterized in that: the laser (2) is used for emitting laser to the AOM acousto-optic modulator (3), the AOM acousto-optic modulator (3) is used for modulating the laser and forming two laser pulses with two different frequencies and a fixed time interval, and the EDFA amplifier (4) is used for amplifying the two laser pulses with two different frequencies and a fixed time interval and inputting the two laser pulses to the sensing optical fiber (1); the coupler (6) is used for receiving two bundles of reverse Rayleigh scattering signals formed in the sensing optical fiber (1) and coupling the two bundles of reverse Rayleigh scattering signals to generate an interference effect, the photoelectric converter (7) is used for converting the interfered reverse Rayleigh scattering signals into electric signals, the ADC (analog-to-digital converter) (8) is used for converting the electric signals into digital signals, and the data processing module (9) is used for processing the digital signals and monitoring whether faults occur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122985362.9U CN216526092U (en) | 2021-11-30 | 2021-11-30 | Fault detection equipment for gas insulated totally-enclosed combined electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122985362.9U CN216526092U (en) | 2021-11-30 | 2021-11-30 | Fault detection equipment for gas insulated totally-enclosed combined electrical apparatus |
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| CN216526092U true CN216526092U (en) | 2022-05-13 |
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| CN202122985362.9U Active CN216526092U (en) | 2021-11-30 | 2021-11-30 | Fault detection equipment for gas insulated totally-enclosed combined electrical apparatus |
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| CN (1) | CN216526092U (en) |
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2021
- 2021-11-30 CN CN202122985362.9U patent/CN216526092U/en active Active
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