CN209858682U - GIS ultrahigh frequency partial discharge on-line monitoring device - Google Patents
GIS ultrahigh frequency partial discharge on-line monitoring device Download PDFInfo
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- CN209858682U CN209858682U CN201920106115.7U CN201920106115U CN209858682U CN 209858682 U CN209858682 U CN 209858682U CN 201920106115 U CN201920106115 U CN 201920106115U CN 209858682 U CN209858682 U CN 209858682U
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Abstract
The utility model relates to a GIS superfrequency partial discharge on-line monitoring device, including setting up in a plurality of on-the-spot cabinets of scene, a plurality of data acquisition units are connected to each on-the-spot cabinet, and each data acquisition unit is respectively through a plurality of UHF partial discharge sensors of UHF cable connection, each data acquisition unit passes through 8 core multimode optical cables and is connected with the on-the-spot main optical fiber of on-the-spot cabinet, the on-the-spot main optical fiber transmits the data remote transmission who gathers for GIS partial discharge on-the-line measuring end and shows; the time characteristic of signal data collected by each sensor is recorded in the collection unit device, and the time characteristic among a plurality of collection units is recorded by the time synchronization device, so that the data of the plurality of sensors of the plurality of collection units can be compared with time scale parameters, and data guarantee is provided for other high-level functions of the system.
Description
Technical Field
The utility model relates to an electric power unit field specifically is a GIS superfrequency partial discharge on-line monitoring device.
Background
GIS (gas insulated switchgear) is important power equipment for ensuring normal operation of a power grid, but faults caused by reduction of GIS insulation performance account for a large proportion. According to the international survey report of the working group of CIGRE 23.10, the insulation fault accounts for 60% of 562 faults of the GIS which is input before 1985, and 51% of 247 faults of the GIS which is input after 1985, and the insulation breakdown result is serious, which can cause large-area power failure and huge economic loss.
Statistics on the reliability of GIS indicate that electrical faults are most often characterized by partial discharges before complete breakdown. In fact, electrode floating inside the GIS due to component looseness and poor contact during manufacturing, installation, transportation and testing, insulation aging, various moving conductive particles and other defects may cause partial discharge to different degrees. Long-term partial discharge of the equipment degrades and expands the insulation, causing eventual insulation breakdown and flashover along the surface, thereby causing a system outage. The comprehensive maintenance not only has large workload, high cost and large power failure loss, but also has the problems of missing report, early report, false report and the like. Therefore, the GIS partial discharge online detection has important significance.
When a system monitors partial discharge signals, the prior art generally adopts a manual positioning mode, namely after GIS ultrahigh frequency partial discharge signals are found, corresponding testing equipment is manually brought to the site for positioning (a high-speed oscilloscope is mainly adopted), signal time differences acquired by different channels of the oscilloscope (pulse signal time differences of different channels are manually analyzed), and signal positioning results are manually calculated.
The manual positioning is adopted, the pulse waveform needs to be manually analyzed, the waveform manual confirmation of an oscilloscope channel possibly has larger error, and the ultrahigh frequency partial discharge signal is transmitted at the light speed, so that the possible deviation of the signal positioning result is larger, and in addition, the following defects are also mainly adopted:
1. single pulse positioning: one signal is positioned through a single artificial pulse, the positioning times within a certain time range are limited, and the signal positioning result cannot be more accurately counted and analyzed;
2. intermittent signal positioning: GIS partial discharge signals are mostly intermittent partial discharge signals, the frequency is possibly low, and a manual mode often cannot acquire enough pulse signals for positioning;
3. positioning historical data: the prior art can not carry out the partial discharge signal location through historical data at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a GIS superfrequency partial discharge on-line monitoring device is provided to solve the defect that exists among the prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a GIS ultrahigh frequency partial discharge online monitoring device comprises a plurality of field cabinets arranged on a field, wherein each field cabinet is connected with a plurality of data acquisition units, each data acquisition unit is respectively connected with a plurality of UHF partial discharge sensors through UHF cables, each data acquisition unit is connected with a field main optical fiber of the field cabinet through an 8-core multimode optical cable, the field main optical fiber remotely transmits acquired data to a GIS partial discharge online detection end for display, the GIS partial discharge online detection end can be connected with a plurality of field cabinets, a group of field main optical fibers and field power supplies are respectively arranged on the GIS partial discharge online detection end corresponding to each field cabinet, the GIS partial discharge online detection end is further provided with a network interface, a field main power supply and a PT signal input interface, and the field main power supplies power to each field power supply; the data acquisition unit is internally provided with a controller, the controller acquires the signal size and the acquisition time of the UHF partial discharge sensor and the serial number of the UHF partial discharge sensor and transmits the signal size and the acquisition time to the GIS partial discharge online detection end, the GIS partial discharge online detection end is internally provided with a main controller for receiving data, positioning and displaying the data online according to the serial number, and the data acquisition unit is also provided with a data memory for storing the acquired data;
furthermore, the controller of the data acquisition unit is also connected with a humidity controller, a heater and a fuse for controlling the humidity, the temperature and the overcurrent in the data acquisition unit;
furthermore, each field cabinet can be connected with 1-8 data acquisition units, the field cabinet supplies power to each connected data acquisition unit through a cable, and the cable is connected with an external power supply through a field power supply of the field cabinet to supply power; each data acquisition unit can be connected with 1-6 UHF partial discharge sensors;
furthermore, the GIS partial discharge online detection end is provided with an alarm node, and alarm information can be transmitted to a user terminal interface in a wireless transmission mode;
furthermore, the GIS partial discharge online detection end and the field cabinet are both provided with grounding ends;
the utility model has the advantages that:
partial discharge in the GIS has high-frequency characteristics, ultrahigh-frequency resonant electromagnetic waves in various modes are formed due to the action of a GIS air chamber, high-frequency discharge signals have high penetrability, and the signals can be received on the basin-type insulator through an ultrahigh-frequency sensor arranged on the GIS; the sensor transmits the acquired signals to the signal acquisition unit, and the acquisition unit processes the signals and then sends the processed signals to the background software system.
The technology is mainly characterized in that the time characteristic of signal data collected by each sensor is recorded in the collection unit device, and the time characteristic among a plurality of collection units is recorded through the time synchronization device, so that the data of the plurality of sensors of the plurality of collection units can be compared with time scale parameters, and data guarantee is provided for other high-level functions of the system.
Drawings
FIG. 1 is a schematic diagram of the wiring structure of the system of the present invention;
FIG. 2 is a schematic diagram of the wiring structure of the data acquisition unit of the present invention;
the reference numerals are explained below:
1. the system comprises a UHF partial discharge sensor, a data acquisition unit, a cable, a 4-8 core multimode optical cable, a 5 field cabinet, a 6 field main optical fiber, a 7 field power supply, a 8 ground terminal, a 9 GIS partial discharge online detection terminal, a 10 alarm node, a 11 network interface, a 12 field main power supply, a 13 PT signal input interface, a data acquisition unit, a; 14. humidity controller 15, heater 16, fuse 17 and controller
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a GIS ultrahigh frequency partial discharge online monitoring device includes a plurality of field cabinets 5 disposed on the field, each field cabinet 5 is connected to a plurality of data acquisition units 2, each data acquisition unit 2 is connected to a plurality of UHF partial discharge sensors 1 through UHF cables, each data acquisition unit 2 is connected to a field main optical fiber 6 of the field cabinet 5 through an 8-core multimode optical cable 4, the field main optical fiber 6 transmits acquired data to a GIS partial discharge online detection end 9 for display, the GIS partial discharge online detection end 9 is connectable to a plurality of field cabinets 5, the GIS partial discharge online detection end 9 is provided with a group of field main optical fibers 6 and a field power supply 7 corresponding to each field cabinet 5, the GIS partial discharge online detection end 9 further has a network interface 11, a field main power supply 12 and a signal input interface 13, the on-site main power supply 12 supplies power to each on-site power supply 7; the data acquisition unit 2 is internally provided with a controller 17, the controller 17 acquires the signal size and the acquisition time of the UHF partial discharge sensor 1 and the serial number of the UHF partial discharge sensor 1 and then transmits the signal size and the acquisition time to the GIS partial discharge online detection end 9, the GIS partial discharge online detection end 9 is internally provided with a main controller which is used for receiving data, positioning and displaying the data online according to the serial number, and the data acquisition unit 2 is also provided with a data memory which is used for storing the acquired data;
more specifically, the controller 17 of the data acquisition unit 2 is further connected with a humidity controller 14, a heater 15 and a fuse 16, and is used for controlling the humidity, the temperature and the overcurrent inside the data acquisition unit 2;
more specifically, each field cabinet 5 can be connected with 1-8 data acquisition units 2, the field cabinet 5 supplies power to each connected data acquisition unit 2 through a cable, and the cable is connected with an external power supply through a field power supply 7 of the field cabinet 5 to supply power; each data acquisition unit 2 can be connected with 1-6 UHF partial discharge sensors 1;
more specifically, the GIS partial discharge online detection end 9 is provided with an alarm node 10, and alarm information can be transmitted to a user terminal interface in a wireless transmission mode;
more specifically, the GIS partial discharge online detection end 9 and the field cabinet 5 are both provided with grounding ends 8;
the specific working principle is as follows:
the system adopts real-time data acquisition, automatic time calibration of multiple acquisition channels, synchronous acquisition of the whole network of the system and recording of the precise time scale of each pulse from each sensor. The position of the partial discharge source can be accurately calculated through a pulse arrival time difference method, the partial discharge defect can be automatically positioned, the defects that the high-speed oscilloscope is time-consuming and labor-consuming in positioning, cannot cope with intermittent signals, cannot position historical data and the like are overcome, a plurality of partial discharge sources can be positioned simultaneously, and the full intellectualization of partial discharge on-line monitoring is really realized. The technology also solves the problem that manual single positioning statistical data are less, and can perform statistical analysis on thousands of positioning data within a certain time to obtain a more accurate positioning result.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The utility model provides a GIS superfrequency partial discharge on-line monitoring device which characterized in that: the GIS partial discharge online detection system comprises a plurality of field cabinets arranged on the field, wherein each field cabinet is connected with a plurality of data acquisition units, each data acquisition unit is respectively connected with a plurality of UHF partial discharge sensors through UHF cables, each data acquisition unit is connected with a field main optical fiber of the field cabinet through an 8-core multimode optical cable, the field main optical fiber transmits acquired data to a GIS partial discharge online detection end in a remote way for display, the GIS partial discharge online detection end can be connected with a plurality of field cabinets, a group of field main optical fibers and field power supplies are respectively arranged on the GIS partial discharge online detection end corresponding to each field cabinet, the GIS partial discharge online detection end is also provided with a network interface, a field main power supply and a PT signal input interface, and the field main power supply supplies power to each field power supply; the data acquisition unit is internally provided with a controller, the controller acquires the signal size and the acquisition time of the UHF partial discharge sensor and the serial number of the UHF partial discharge sensor and transmits the signal size and the acquisition time to the GIS partial discharge online detection end, the GIS partial discharge online detection end is internally provided with a main controller which is used for receiving data, positioning and displaying the data online according to the serial number, and the data acquisition unit is also provided with a data memory which is used for storing the acquired data.
2. The GIS ultrahigh frequency partial discharge online monitoring device according to claim 1, characterized in that: each field cabinet can be connected with 1-8 data acquisition units, the field cabinet supplies power to each connected data acquisition unit through a cable, and the cable is connected with an external power supply through a field power supply of the field cabinet to supply power; each data acquisition unit can be connected with 1-6 UHF partial discharge sensors.
3. The GIS ultrahigh frequency partial discharge online monitoring device according to claim 2, characterized in that: the GIS partial discharge online detection end is provided with an alarm node, and alarm information can be transmitted to a user terminal interface in a wireless transmission mode.
4. The GIS ultrahigh frequency partial discharge online monitoring device according to claim 3, characterized in that: the controller of the data acquisition unit is also connected with a humidity controller, a heater and a fuse for controlling the humidity, the temperature and the overcurrent in the data acquisition unit.
5. The GIS ultrahigh frequency partial discharge online monitoring device according to claim 4, characterized in that: and the GIS partial discharge online detection end and the field cabinet are both provided with grounding ends.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920106115.7U CN209858682U (en) | 2019-01-22 | 2019-01-22 | GIS ultrahigh frequency partial discharge on-line monitoring device |
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| CN201920106115.7U CN209858682U (en) | 2019-01-22 | 2019-01-22 | GIS ultrahigh frequency partial discharge on-line monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541419A (en) * | 2019-01-22 | 2019-03-29 | 珠海市伊特高科技有限公司 | A kind of GIS ultrahigh frequency local discharge on-line monitoring device using automatic positioning technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541419A (en) * | 2019-01-22 | 2019-03-29 | 珠海市伊特高科技有限公司 | A kind of GIS ultrahigh frequency local discharge on-line monitoring device using automatic positioning technology |
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