CN202522618U - Device for carrying out online monitoring on grounding of transformer core - Google Patents
Device for carrying out online monitoring on grounding of transformer core Download PDFInfo
- Publication number
- CN202522618U CN202522618U CN2012201480873U CN201220148087U CN202522618U CN 202522618 U CN202522618 U CN 202522618U CN 2012201480873 U CN2012201480873 U CN 2012201480873U CN 201220148087 U CN201220148087 U CN 201220148087U CN 202522618 U CN202522618 U CN 202522618U
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- current
- transformer core
- grounding
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000012806 monitoring device Methods 0.000 claims description 15
- 230000003321 amplification Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a device for carrying out online monitoring on grounding of a transformer core, which comprises a sensor, a signal processing circuit and a display device, wherein the sensor is used for acquiring current signals in a down lead of the core; the signal processing circuit is used for processing the current signals; and the display device is used for controlling the display states of display lamps according to different current values, and carrying out online display on result signals according to different display states of the display lamps. According to the utility model, signals are acquired through a high-precision grounding current sensor, and then through carrying out processing and logic control on the signals, the visual monitoring of grounding currents of the transformer core is realized; the online monitoring and current display of grounding currents of the transformer core are realized; normal, early-warning and fault currents are identified, and the visual monitoring of on-duty persons of substations is realized through green, yellow and red display lamps; the fault early warning is realized through the warning of a buzzer, thereby realizing the timely processing of grounding faults of the core; and a communication interface is kept so as to provide a platform for realizing the remote control of grounding early warning of the core.
Description
Technical field
The utility model relates to a kind of transformer and carries out monitoring device, particularly a kind of transformer iron core grounding current on-Line Monitor Device.
Background technology
Transformer is the major equipment of electric system; The heart of transformer station especially; The transformer core one point earth of normal operation if 2 perhaps while ground connection more than 2 are arranged, then will form current return between iron core and the earth; Maximum current can reach tens amperes, will cause local overheating unshakable in one's determination even burns.
Firm assurance transformer core one point earth is one of essential condition that guarantees the transformer safe and reliable operation.Existing transformer core ground detecting method roughly is divided into three kinds: regularly use clamp on amperemeter to measure Leakage Current down to the transformer fe core lead; Use the insulation against ground of megohmmeter test iron core; The transformer insulation oil characteristic gas is carried out stratographic analysis.More than three kinds of method operating process loaded down with trivial details, and all can not realize transformer core ground connection on-line monitoring and fault pre-alarming, in case earth fault takes place, can not in time handle, will have serious consequences.Therefore develop a kind of transformer core ground connection on-line monitoring system and just seem very necessary.
The utility model content
In view of this, the utility model technical matters to be solved provides a kind of transformer iron core grounding current on-line monitoring system.
The utility model is realized through following technical scheme:
The transformer core ground connection on-line monitoring device that the utility model provides comprises sensor, signal processing circuit and display device;
Said sensor is used for gathering the current signal of iron core downlead;
Said signal processing circuit is used for current signal and output result signal that processes sensor is gathered;
Said display device is used for according to online display result signal.
Further, said sensor adopts open-loop current sensor, and said open-loop current sensor comprises rectangle ferrite half magnet ring and enameled wire, and said enameled wire is wound on the magnet ring.
Further, said signal processing circuit comprises A/D convertor circuit, signal amplification circuit and photoelectric isolation module;
Said A/D convertor circuit is used for the current signal of receiving sensor collection and current signal is converted into digital signal;
Said signal amplification circuit is used for the amplifier digital signal;
Said photoelectric isolation module is used for signal after iron core grounding current signal and the processing of circuit is isolated;
Further, also comprise Logic control module and LED display lamp;
Said Logic control module is used for the different electric flow valuve is converted into the show state that display lamp was exported and controlled to logical signal;
Said LED display lamp is used for showing through the different show states of display lamp the different electric flow valuve of iron core downlead.
Further, also comprise the warning device that is used for sending alerting signal according to the different value of iron core grounding current; Said warning device is connected with Logic control module.
Further, also comprise power supply, said power supply is connected with Logic control module with signal processing circuit respectively.
Further, also comprise the reservation output interface, said reservation output interface is used to the back-end data acquisition system signal and remote monitoring is provided.
The beneficial effect of the utility model is: the utility model through signal Processing, logic control, is realized the transformer iron core grounding current visualizing monitor through high precision ground current sensor acquisition signal.Realize that transformer iron core grounding current on-line monitoring, electric current show; Identification is normal, early warning, fault current, and realizes the operator on duty of transformer station visualizing monitor through green, yellow, red display lamp; The hummer alarm realizes fault pre-alarming, and realization iron core grounding fault is in time handled; Keep communication interface, platform is provided for realizing iron core grounding early warning Long-distance Control.
Other advantages, target and the characteristic of the utility model will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from the practice of the utility model, obtain instruction to investigating of hereinafter.The target of the utility model and other advantages can realize and obtain through following instructions and claims.
Description of drawings
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model is done further to describe in detail below, wherein:
The transformer core ground connection on-line monitoring device block diagram that Fig. 1 provides for the utility model embodiment;
The structural drawing of the sensor that Fig. 2 provides for the utility model embodiment;
The transformer core ground connection on-line monitoring device panel that Fig. 3 provides for the utility model embodiment.
Embodiment
Below will be with reference to accompanying drawing, the preferred embodiment of the utility model is carried out detailed description.Should be appreciated that preferred embodiment has been merely explanation the utility model, rather than in order to limit the protection domain of the utility model.
The transformer core ground connection on-line monitoring device block diagram that Fig. 1 provides for the utility model embodiment; The structural drawing of the sensor that Fig. 2 provides for the utility model embodiment; The transformer core ground connection on-line monitoring device panel that Fig. 3 provides for the utility model embodiment; As shown in the figure: the transformer core ground connection on-line monitoring device that the utility model provides comprises sensor, signal processing circuit, display device, Logic control module, LED display lamp, is used for sending according to the different value of iron core grounding current warning device, power supply and the reservation output interface of alerting signal;
Said sensor is used for gathering the current signal of iron core downlead; Said sensor adopts open-loop current sensor; Said open-loop current sensor comprises rectangle ferrite half magnet ring and enameled wire, and said enameled wire is wound on the magnet ring, but the open-loop current sensor filtering is partly disturbed; Do not changing the main transformer operation conditions; Be fit to multiple situation and install, according to the iron core grounding current parameter (several mA～tens A, power frequency～kHz), correlation computations formula and take into account response band and sensitivity, magnet ring is got rectangle ferrite (50 * 40 * 10mm); Enameled wire is got Φ 2.2mm copper cash, and number of turn N gets 100.
Said signal processing circuit is used for current signal and output result signal that processes sensor is gathered;
Said display device is used for according to online display result signal.
Said signal processing circuit comprises A/D convertor circuit, signal amplification circuit and photoelectric isolation module;
Said A/D convertor circuit is used for the current signal of receiving sensor collection and current signal is converted into digital signal;
Said signal amplification circuit is used for the amplifier digital signal;
Said photoelectric isolation module is used for signal after iron core grounding current signal and the processing of circuit is isolated;
Signal processing circuit adopts the amplifier improved circuit, and amplifier is selected OP07, and 100 times of electric current control voltage source amplifying signals are the iron core grounding current actual value through the electric current after the signal processing circuit then.
Said Logic control module is used for the different electric flow valuve is converted into the show state that display lamp was exported and controlled to logical signal;
Said LED display lamp is used for showing through the different show states of display lamp the different electric flow valuve of iron core downlead.
Green, yellow and red three kinds of colors that LED display lamp in the present embodiment adopts; Circular sky in Fig. 3 in the panel is provided with this LED display lamp, and the rectangle sky is the display screen of display device, when current value is 0-0.1A; When having only green light to light, expression is in normal condition; When current value was 0.1-0.3A, when having only amber light to light, expression was in alert status; When current value is 0.3 when above, when having only red colored lamp to light, expression is in the fault alarm state; Drive alarm this moment is hummer work.
Said warning device is connected with Logic control module.Said power supply is connected with Logic control module with signal processing circuit respectively.
Said reservation output interface is used to the back-end data acquisition system signal is provided, so that remote monitoring.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although the preferred embodiment through with reference to the utility model is described the utility model; But those of ordinary skill in the art should be appreciated that and can make various changes to it in form with on the details, and the spirit and the scope of the utility model that does not depart from appended claims and limited.
Claims (7)
1. transformer core ground connection on-line monitoring device is characterized in that: comprise sensor, signal processing circuit and display device;
Said sensor is used for gathering the current signal of iron core downlead;
Said signal processing circuit is used for current signal and output result signal that processes sensor is gathered;
Said display device is used for according to online display result signal.
2. transformer core ground connection on-line monitoring device according to claim 1; It is characterized in that: said sensor adopts open-loop current sensor; Said open-loop current sensor comprises rectangle ferrite half magnet ring and enameled wire, and said enameled wire is wound on the magnet ring.
3. transformer core ground connection on-line monitoring device according to claim 2, it is characterized in that: said signal processing circuit comprises A/D convertor circuit, signal amplification circuit and photoelectric isolation module;
Said A/D convertor circuit is used for the current signal of receiving sensor collection and current signal is converted into digital signal;
Said signal amplification circuit is used for the amplifier digital signal;
Said photoelectric isolation module is used for signal after iron core grounding current signal and the processing of circuit is isolated.
4. transformer core ground connection on-line monitoring device according to claim 3 is characterized in that: also comprise Logic control module and LED display lamp;
Said Logic control module is used for the different electric flow valuve is converted into the show state that display lamp was exported and controlled to logical signal;
Said LED display lamp is used for showing through the different show states of display lamp the different electric flow valuve of iron core downlead.
5. transformer core ground connection on-line monitoring device according to claim 4 is characterized in that: also comprise the warning device that is used for sending according to the different value of iron core grounding current alerting signal; Said warning device is connected with Logic control module.
6. transformer core ground connection on-line monitoring device according to claim 5 is characterized in that: also comprise power supply, said power supply is connected with Logic control module with signal processing circuit respectively.
7. transformer core ground connection on-line monitoring device according to claim 6 is characterized in that: also comprise the reservation output interface, said reservation output interface is used to the back-end data acquisition system signal and remote monitoring is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201480873U CN202522618U (en) | 2012-04-10 | 2012-04-10 | Device for carrying out online monitoring on grounding of transformer core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201480873U CN202522618U (en) | 2012-04-10 | 2012-04-10 | Device for carrying out online monitoring on grounding of transformer core |
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| Publication Number | Publication Date |
|---|---|
| CN202522618U true CN202522618U (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201480873U Expired - Lifetime CN202522618U (en) | 2012-04-10 | 2012-04-10 | Device for carrying out online monitoring on grounding of transformer core |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155596A (en) * | 2014-08-12 | 2014-11-19 | 北京航空航天大学 | Artificial circuit fault diagnosis system based on random forest |
| CN105203834A (en) * | 2015-08-24 | 2015-12-30 | 国网山东省电力公司聊城供电公司 | Transformer iron core and clamp member current standard exceeding alarm instrument |
| CN107132473A (en) * | 2017-05-17 | 2017-09-05 | 肇庆三向教学仪器制造有限公司 | A kind of low-voltage intelligent monitoring terminal |
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
| CN108828305A (en) * | 2018-07-03 | 2018-11-16 | 国网冀北电力有限公司检修分公司 | A kind of transformer iron core grounding current measuring device |
| CN112834811A (en) * | 2021-01-04 | 2021-05-25 | 中国电力科学研究院有限公司 | Ground current state monitoring method and device applying magnetic resistance sensing and storage medium |
-
2012
- 2012-04-10 CN CN2012201480873U patent/CN202522618U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155596A (en) * | 2014-08-12 | 2014-11-19 | 北京航空航天大学 | Artificial circuit fault diagnosis system based on random forest |
| CN104155596B (en) * | 2014-08-12 | 2017-01-18 | 北京航空航天大学 | Artificial circuit fault diagnosis system based on random forest |
| CN105203834A (en) * | 2015-08-24 | 2015-12-30 | 国网山东省电力公司聊城供电公司 | Transformer iron core and clamp member current standard exceeding alarm instrument |
| CN107132473A (en) * | 2017-05-17 | 2017-09-05 | 肇庆三向教学仪器制造有限公司 | A kind of low-voltage intelligent monitoring terminal |
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
| CN108318732B (en) * | 2018-03-13 | 2024-01-23 | 国家电网公司 | On-line monitoring device and method for grounding current of transformer core |
| CN108828305A (en) * | 2018-07-03 | 2018-11-16 | 国网冀北电力有限公司检修分公司 | A kind of transformer iron core grounding current measuring device |
| CN112834811A (en) * | 2021-01-04 | 2021-05-25 | 中国电力科学研究院有限公司 | Ground current state monitoring method and device applying magnetic resistance sensing and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121206 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121206 Address after: 401220, 8, Wangjiang Road, Fengcheng street, Changshou District, Chongqing Patentee after: Changshou Power Supply Bureau of Chongqing Electric Power Corporation Patentee after: State Grid Corporation of China Address before: 401220, 8, Wangjiang Road, Fengcheng street, Changshou District, Chongqing Patentee before: Changshou Power Supply Bureau of Chongqing Electric Power Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |