CN204422659U - A kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response - Google Patents

A kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response Download PDF

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Publication number
CN204422659U
CN204422659U CN201520077477.XU CN201520077477U CN204422659U CN 204422659 U CN204422659 U CN 204422659U CN 201520077477 U CN201520077477 U CN 201520077477U CN 204422659 U CN204422659 U CN 204422659U
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China
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transient
module
signal transmitting
transmitting apparatus
grounding
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CN201520077477.XU
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Inventor
司文荣
傅晨钊
黄华
杨凌辉
陆启宇
顾承昱
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State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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State Grid Shanghai Electric Power Co Ltd
East China Power Test and Research Institute Co Ltd
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Abstract

The utility model relates to a kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response, comprise Grounding downlead to connect and electric current and voltage pole unwrapping wire module, dash current generation, storage and signal transmitting apparatus module, transient-wave collection, storage and signal transmitting apparatus, computational analysis, display and control module, and printout module; Described Grounding downlead connects and electric current and voltage pole unwrapping wire module occurs with dash current respectively, stores and signal transmitting apparatus module, and transient-wave collection, storage are connected with signal transmitting apparatus; Described computational analysis, display and control module occur with dash current respectively, store and signal transmitting apparatus module, transient-wave collection, storage and signal transmitting apparatus and printout model calling.Compared with prior art, the utility model have diagnosis efficiency high, easy and simple to handle, measure the advantages such as accurate.

Description

A kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response
Technical field
The utility model relates to a kind of grounding net of transformer substation monitoring technology, especially relates to a kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response.
Background technology
Grounding net of transformer substation is the critical facility guaranteeing electrical equipment and personal safety.Because grounded screen is embedded in underground, often because of soil corrosion for many years, cause grounding body to attenuate and even rupture, make Grounding performance depreciation.At present, engineering is generally judged by power frequency earthing resistance indirectly to the detection of Grounding performance quality, but the corrosion condition of grounded screen cannot be understood.As long as because the grounding body of measured place open circuit does not occur, even if grounded screen is by heavy corrosion, power frequency earthing resistance also can reach regulatory requirements usually.So engineering is all generally after finding that earth mat power frequency earthing resistance is defective or the accident that causes due to ground network defect occurs, search grounded screen breakpoint and corrosion section by dig on a wide area, this method of work is with blindness, and workload is very big.
In addition, it is 50Hz or close to the power-frequency earthing resistance value under 50Hz that at present conventional power frequency earthing resistance tests the impedance ground value obtained, but be in fact short-circuited in transformer station earth fault, or under Lightning Incoming Wave or operation ripple effect, the transient state Transient grounding resistance of grounded screen plays a decisive role.Therefore only measure power-frequency earthing impedance can not represent grounding net of transformer substation can safe operation under fault condition.
Utility model content
The purpose of this utility model be exactly provide to overcome defect that above-mentioned prior art exists a kind of diagnosis efficiency high, easy and simple to handle, measure grounding net of transformer substation Transient grounding resistance and respond automatic test diagnosis equipment accurately, it is not when having a power failure and do not carry out dig on a wide area, only rely on grounded screen downlead as input and output side, just can detect the running status of grounded screen and corrosion condition.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response, it is characterized in that, comprise Grounding downlead to connect and electric current and voltage pole unwrapping wire module, dash current generation, storage and signal transmitting apparatus module, transient-wave collection, storage and signal transmitting apparatus, computational analysis, display and control module, and printout module;
Described Grounding downlead connects and electric current and voltage pole unwrapping wire module occurs with dash current respectively, stores and signal transmitting apparatus module, and transient-wave collection, storage are connected with signal transmitting apparatus; Described computational analysis, display and control module occur with dash current respectively, store and signal transmitting apparatus module, transient-wave collection, storage and signal transmitting apparatus and printout model calling.
Described Grounding downlead connects and electric current and voltage pole unwrapping wire module occurs respectively by wire and dash current, stores and signal transmitting apparatus module, and transient-wave collection, storage are connected with signal transmitting apparatus.
Described dash current occurs, storage is connected with computational analysis, display and control module respectively by usb communication interface with signal transmitting apparatus module and transient-wave collection, storage and signal transmitting apparatus.
Described computational analysis, display and control module are by TCP/IP network and printout model calling.
Described computational analysis, display and control module are notebook computer or industrial computer.
Described transient-wave collection, storage and signal transmitting apparatus are transient-wave registering instrument, comprise communication and control circuit, data acquisition storage and output circuit, power-switching circuit and power supply, described communication is connected with data acquisition storage and output circuit with control circuit, described power-switching circuit input end is connected with power supply, and output terminal is connected with communication and control circuit, data acquisition storage and output circuit respectively.
Described dash current occurs, store and signal transmitting apparatus module comprises communication and control module, dash current occur and output unit, data acquisition storage and output unit, power conversion unit and power supply, described communication and control module occur with dash current respectively and output unit, data acquisition storage and output unit are connected, the input end of described power conversion unit is connected with power supply, output terminal respectively with communication and control module, dash current occurs and output unit, data acquisition storage and output unit are connected.
Described power supply provides working power for internal mass dc-battery or outside 220V.
Compared with prior art, the utility model, when not having a power failure and do not excavate earth mat, understands the running status of grounded screen, judges whether grounded screen corrodes, ensure safety, the reliability service of electric system, and there is the advantages such as the restriction simply, accurately and not being subject to on-the-spot service condition.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model;
Fig. 2 is the schematic diagram of an embodiment of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment
As shown in Figure 1, a kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response, it is characterized in that, comprise Grounding downlead to connect and electric current and voltage pole unwrapping wire module 10, dash current generation, storage and signal transmitting apparatus module 11, transient-wave collection, storage and signal transmitting apparatus 12, computational analysis, display and control module 13, and printout module 14; Described Grounding downlead connects and electric current and voltage pole unwrapping wire module 10 occurs with dash current respectively, stores and signal transmitting apparatus module 11, and transient-wave collection, storage are connected with signal transmitting apparatus 12; Described computational analysis, display and control module 13 occur with dash current respectively, store and signal transmitting apparatus module 11, and transient-wave collection, storage and signal transmitting apparatus 12 and printout module 14 are connected.
Described Grounding downlead connects and electric current and voltage pole unwrapping wire module 10 occurs respectively by wire and dash current, stores and signal transmitting apparatus module 11, and transient-wave collection, storage are connected with signal transmitting apparatus 12.
Described dash current occurs, storage is connected with computational analysis, display and control module 13 respectively by usb communication interface with signal transmitting apparatus module 11 and transient-wave collection, storage and signal transmitting apparatus 12.
Described computational analysis, display and control module 13 are connected with printout module 14 by TCP/IP network.Described computational analysis, display and control module 13 are notebook computer or industrial computer.
Described transient-wave collection, storage and signal transmitting apparatus 12 are transient-wave registering instrument, comprise communication and control circuit, data acquisition storage and output circuit, power-switching circuit and power supply, described communication is connected with data acquisition storage and output circuit with control circuit, described power-switching circuit input end is connected with power supply, and output terminal is connected with communication and control circuit, data acquisition storage and output circuit respectively.
Described dash current occurs, store and signal transmitting apparatus module 11 comprises communication and control module, dash current occur and output unit, data acquisition storage and output unit, power conversion unit and power supply, described communication and control module occur with dash current respectively and output unit, data acquisition storage and output unit are connected, the input end of described power conversion unit is connected with power supply, output terminal respectively with communication and control module, dash current occurs and output unit, data acquisition storage and output unit are connected.
Described power supply provides working power for internal mass dc-battery or outside 220V.
As shown in Figure 2, enter a transformer station, the 1# main transformer earthing bar downlead 7 of this grounding net of transformer substation 5 selected is grounded screen impact impedance test point and shock response input end G, according to grounded screen catercorner length according to DL/T475-2006 electric discharge pressure p-wire voltage ground pole 91, testing current line current earthing pole 92 afield afield.Down conductor input end G and testing current line are connected to on-the-spot dash current hair device 2.Select wiretap lightning arrester A, enclosure wall corner B down conductor 7 as grounded screen shock response output terminal, and voltage tester line is all connected to transient-wave registering instrument 3.Host computer 4 is connected with dash current hair device 2, transient-wave registering instrument 3 by USB interface.Arrange dash current hair device 2 outputting standard current waveform 8/20 μ s by host computer 4, peak value is greater than 10A, arranges transient-wave registering instrument 3 sampling rate and is set to 100MS/s.Relevant connection is with setting completed, and test record also carries out computation and analysis, draws shock response curve, obtains the shock response curve of grounded screen Transient grounding resistance and each output terminal; Ground net corrosion state can be assessed according to the related coefficient size of the change of present percussion impedance ground value and present percussion response curve and history curve.
The utility model adopts man-machine interface, mainly comprises establishment engineering interface, data acquisition interface, diagnostic result interface.As long as wherein input grounded screen title to be measured, electric pressure and selected the position of input and output side down conductor in establishment engineering interface, and export impulse current waveform parameter and temporary voltage waveform acquisition parameter, test can be entered and data acquisition interface is tested.After test terminates, this group data can be calculated at once, obtain the grounded screen Transient grounding resistance of input end grounding downlead and the shock response curve of output head grounding downlead, and in graphical form result of calculation is presented in display screen, and in conjunction with historical data, obtain the variation tendency of this grounded screen Transient grounding resistance and the related coefficient of present percussion response curve and historical data, and then judge the running status of grounded screen.
The utility model outstanding behaviours business characteristic of the automatic testing and diagnosing of grounding net of transformer substation, utilizes the detection means of electronization to instead of manual detection, enormously simplify means of testing, improve detection efficiency.
In the utility model case study on implementation, dash current hair device 2, transient-wave registering instrument 3 and host computer 4 all make use of built-in high-capacity direct galvanic battery, also all can utilize ready-made 220V external power source.
System follows open criterion, enjoys maximum data and gather robotization and grounded screen state analysis system under the environment that user is used in reality.In the present system, the opening of system shows the open nature of data acquisition system (DAS), data base management system (DBMS) and applied analysis system, have employed communication standard usb protocol alternately between data.
The foregoing is only specific embodiment of the utility model, but technical characteristic of the present utility model is not limited thereto, any those skilled in the art is again in field of the present utility model, and the change done or modify all is encompassed in the scope of the claims of the present utility model.

Claims (8)

1. a grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response, it is characterized in that, comprise Grounding downlead to connect and electric current and voltage pole unwrapping wire module (10), dash current generation, storage and signal transmitting apparatus module (11), transient-wave collection, storage and signal transmitting apparatus (12), computational analysis, display and control module (13), and printout module (14);
Described Grounding downlead connects and electric current and voltage pole unwrapping wire module (10) occurs with dash current respectively, stores and signal transmitting apparatus module (11), and transient-wave collection, storage are connected with signal transmitting apparatus (12); Described computational analysis, display and control module (13) occur with dash current respectively, store and signal transmitting apparatus module (11), and transient-wave collection, storage and signal transmitting apparatus (12) and printout module (14) are connected.
2. a kind of grounding net of transformer substation Transient grounding resistance according to claim 1 and the automatic test diagnosis equipment of response, it is characterized in that, described Grounding downlead connects and electric current and voltage pole unwrapping wire module (10) occurs respectively by wire and dash current, stores and signal transmitting apparatus module (11), and transient-wave collection, storage are connected with signal transmitting apparatus (12).
3. a kind of grounding net of transformer substation Transient grounding resistance according to claim 1 and the automatic test diagnosis equipment of response, it is characterized in that, described dash current generation, storage are connected with computational analysis, display and control module (13) respectively by usb communication interface with signal transmitting apparatus module (11) and transient-wave collection, storage and signal transmitting apparatus (12).
4. a kind of grounding net of transformer substation Transient grounding resistance according to claim 1 and the automatic test diagnosis equipment of response, it is characterized in that, described computational analysis, display and control module (13) are connected with printout module (14) by TCP/IP network.
5. a kind of grounding net of transformer substation Transient grounding resistance according to claim 1 and the automatic test diagnosis equipment of response, it is characterized in that, described computational analysis, display and control module (13) are notebook computer or industrial computer.
6. a kind of grounding net of transformer substation Transient grounding resistance according to claim 1 and the automatic test diagnosis equipment of response, it is characterized in that, described transient-wave collection, storage and signal transmitting apparatus (12) are transient-wave registering instrument, comprise communication and control circuit, data acquisition storage and output circuit, power-switching circuit and power supply, described communication is connected with data acquisition storage and output circuit with control circuit, described power-switching circuit input end is connected with power supply, output terminal respectively with communication and control circuit, data acquisition storage is connected with output circuit.
7. a kind of grounding net of transformer substation Transient grounding resistance according to claim 1 and the automatic test diagnosis equipment of response, it is characterized in that, described dash current occurs, storage and signal transmitting apparatus module (11) comprise communication and control module, dash current occurs and output unit, data acquisition storage and output unit, power conversion unit and power supply, described communication and control module occur and output unit with dash current respectively, data acquisition storage is connected with output unit, the input end of described power conversion unit is connected with power supply, output terminal respectively with communication and control module, dash current occurs and output unit, data acquisition storage is connected with output unit.
8. a kind of grounding net of transformer substation Transient grounding resistance according to claim 6 or 7 and the automatic test diagnosis equipment of response, it is characterized in that, described power supply provides working power for internal mass dc-battery or outside 220V.
CN201520077477.XU 2015-02-03 2015-02-03 A kind of grounding net of transformer substation Transient grounding resistance and the automatic test diagnosis equipment of response Active CN204422659U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977492A (en) * 2015-07-31 2015-10-14 国网上海市电力公司 10kV power distribution pole grounding state evaluation system and 10kV power distribution pole grounding state evaluation method
CN107782445A (en) * 2017-11-27 2018-03-09 武汉大学 Thunder monitors the large air gap discharge sound source transient response amplitude scaling method of sensor
CN110308351A (en) * 2019-07-12 2019-10-08 国网江苏省电力有限公司电力科学研究院 Grounded screen frequency response measurement system and method based on short-term transients time domain measurement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977492A (en) * 2015-07-31 2015-10-14 国网上海市电力公司 10kV power distribution pole grounding state evaluation system and 10kV power distribution pole grounding state evaluation method
CN107782445A (en) * 2017-11-27 2018-03-09 武汉大学 Thunder monitors the large air gap discharge sound source transient response amplitude scaling method of sensor
CN107782445B (en) * 2017-11-27 2019-10-25 武汉大学 The large air gap discharge sound source transient response amplitude scaling method of thunder monitoring sensor
CN110308351A (en) * 2019-07-12 2019-10-08 国网江苏省电力有限公司电力科学研究院 Grounded screen frequency response measurement system and method based on short-term transients time domain measurement

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