CN102435900A - Detection device and method for one-point grounding of voltage transformation secondary circuit N600 - Google Patents
Detection device and method for one-point grounding of voltage transformation secondary circuit N600 Download PDFInfo
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- CN102435900A CN102435900A CN2011103273505A CN201110327350A CN102435900A CN 102435900 A CN102435900 A CN 102435900A CN 2011103273505 A CN2011103273505 A CN 2011103273505A CN 201110327350 A CN201110327350 A CN 201110327350A CN 102435900 A CN102435900 A CN 102435900A
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Abstract
The invention relates to a detection device for one-point grounding of a voltage transformation secondary circuit N600. The detection device comprises a signal generator and a detector which are respectively arranged in a detection device casing. The invention also relates to a detection method for the one-point grounding of the voltage transformation secondary circuit N600. According to the detection method, a standard current signal is injected in a voltage transformation secondary circuit N600 network during operation; when one-point grounding of the voltage transformation secondary circuit N600 network only occurs, the magnitude of the standard current signal is consistent with the known grounding point current detected by a detector; when multi-point grounding of the voltage transformation secondary circuit N600 network occurs, the standard current is shunted; and at the same time, the magnitude of the standard current signal is inconsistent with the known grounding point current detected by the detector, and thereby two or more grounding points are judged. The detection device and method disclosed by the invention have the advantages that the one-point grounding condition of the voltage transformation secondary circuit N600 network during operation can be quickly, conveniently and safely checked and the grounding position of the voltage transformation secondary circuit N600 network is searched.
Description
Technical field
The present invention relates to a kind of pick-up unit that becomes secondary circuit N600 one point earth of pressing.
The invention still further relates to a kind of detection method that becomes secondary circuit N600 one point earth of pressing.
Background technology
The relay protection ac voltage circuit is one of information source of protective device in the transformer station, is the precondition of protection correct operation.According to relevant rules regulation, press become secondary voltage circuit N600 network must one point earth and can only one point earth.Unearthed or the multipoint earthing like the N600 network all might cause protective device malfunction or tripping.
For operating transformer station, really whether the N600 network one point earth, does not have means to detect at present, only depends on the wiring when going into operation to guarantee.A plurality of protections gap is housed on the N600 network,, causes serious consequence in case gap breakdown or N600 network cable insulation damages ground connection all can cause N600 network multipoint earthing.For addressing the above problem, the spy provides a kind of can detect the new technical scheme that transformer station in service presses change secondary voltage circuit N600 network one point earth situation.
Summary of the invention
The purpose of this invention is to provide a kind of pressure and become secondary circuit N600 one point earth pick-up unit.
Another object of the present invention provides the detection method that a kind of pressure that can detect the pressure change secondary voltage circuit N600 of transformer station network one point earth situation in service becomes secondary circuit N600 one point earth.
The technical scheme that the present invention adopts is:
A kind of pressure becomes secondary circuit N600 one point earth pick-up unit, and it comprises signal generator and detecting device, and said signal generator and detecting device all place in the pick-up unit housing.
Said signal generator comprises output 10mA and two grades of constant current sources of 100mA.
Said detecting device is the high Precision Detection device.
A kind of detection method that becomes secondary circuit N600 one point earth of pressing; Become the current signal that secondary voltage circuit N600 network injects a standard through pressure in operation; When press becoming secondary voltage circuit N600 network and have only one point earth, it is consistent that normalized current signal magnitude and detecting device detect known earth point electric current; When pressing change secondary voltage circuit N600 network that multipoint earthing is arranged; The normalized current signal that injects constitutes a plurality of loops; Normalized current forms shunting; This moment normalized current signal magnitude and detecting device to detect known earth point electric current inconsistent, thereby judging to press becomes the existence of secondary voltage circuit N600 network and above earth point at 2.
Advantage of the present invention is: use this device to detect and press the method that becomes secondary circuit N600 one point earth; Can check fast, convenient and safely that pressure in service becomes secondary voltage circuit N600 network one point earth situation, and search and press change secondary voltage circuit 2 ground connection of N600 network or multipoint earthing particular location.
Description of drawings
Fig. 1 presses the structural representation that becomes secondary circuit N600 one point earth pick-up unit for the present invention is a kind of.
Fig. 2 presses the schematic diagram of the detection method that becomes secondary circuit N600 one point earth for the present invention is a kind of.
Wherein: 1, press to become secondary voltage circuit N600 network, 2, signal generator, 3, detecting device, 4, the pick-up unit housing.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
As shown in Figure 1, a kind of pressure of the present invention becomes secondary circuit N600 one point earth pick-up unit, and it comprises signal generator 2 and detecting device 3; Signal generator 2 all places in the pick-up unit housing 4 with detecting device 3, and signal generator 2 is a kind of constant current sources, and signal generator 3 comprises output 10mA and two grades of constant current sources of 100mA; Detecting device 3 is the high Precision Detection device; Have high precision clamp on amperemeter and reorder function, resolution 0.1mA, precision is ± 1%.
As shown in Figure 2; A kind of detection method that becomes secondary circuit N600 one point earth of pressing of the present invention; Signal generator 2 is to pressing the A point that becomes secondary voltage circuit N600 network 1 to inject the normalized current of a 10mA; When press becoming secondary voltage circuit N600 network 1 only when the full earth point B of institute puts ground connection in order, detecting device 3 is consistent with the injection normalized current size of signal generator 2 in the size of current that B point detects, and then can be judged as pressure change secondary voltage circuit N600 network 1 and have only one point earth;
Become secondary voltage circuit N600 network 1 except that the full earth point B of institute point ground connection when pressing; When C point or F point also have ground connection; Signal generator 2 is to pressing the A point that becomes secondary voltage circuit N600 network 1 to inject the normalized current of a 10mA; Because there is shunting in signal code; Detector 3 then can be judged as and press change secondary voltage circuit N600 network 1 to have 2 ground connection or multipoint earthing the size of current of B point detection and not of uniform size the causing of injection normalized current of signal generator 2;
When pressing change secondary voltage circuit N600 network 1 to have 2 ground connection or multipoint earthing; Search and press the method that becomes secondary voltage circuit 1 two ground connection of N600 network or multipoint earthing particular location (to suppose the 3mA that splits into of C point ground connection as follows; F point ground connection split into 4mA): signal generator 2 is to the normalized current of a 10mA of A point injection who presses time variant voltage secondary circuit N600 network 1; Detecting device 3 detects E point electric current, and test result is 0mA, judges the no earth point in E point left side; Detecting device 3 detects G point electric current, and test result is 3mA, judges that there is earth point G point top; Detecting device 3 detects D point electric current, and test result is 0mA, judges the no earth point in D point left side; Detecting device 3 detects C point electric current, and test result is 3mA, judges that there is earth point at C point place; C point ground connection is detected G, C point electric current after handling once more, and test result is 0mA, judges that C point ground connection disposes the no ground connection of C point; Detecting device 3 detects H point electric current, and test result is 4mA, judges that there is earth point H point below; Detecting device 3 detects F point electric current, and test result is 4mA, judges that there is earth point at F point place; F point ground connection is detected H, F point electric current after handling once more, and test result is 0mA, judges that F point ground connection disposes the no ground connection of F point; Detect the full earth point B of institute point electric current at last, test result is 10mA, and the normalized current size of injecting with signal generator 2 is consistent, then can be judged as to press change secondary voltage circuit N600 network 1 to have only one point earth.
Use this device to detect and press the method that becomes secondary circuit N600 one point earth; Can check fast, convenient and safely that pressure in service becomes secondary voltage circuit N600 network one point earth situation, and search and press change secondary voltage circuit 2 ground connection of N600 network or multipoint earthing particular location.
Claims (4)
1. press change secondary circuit N600 one point earth pick-up unit for one kind, it is characterized in that: it comprises signal generator and detecting device, and said signal generator and detecting device all place in the pick-up unit housing.
2. a kind of pressure according to claim 1 becomes secondary circuit N600 one point earth pick-up unit, and it is characterized in that: said signal generator comprises output 10mA and two grades of constant current sources of 100mA.
3. a kind of pressure according to claim 1 becomes secondary circuit N600 one point earth pick-up unit, and it is characterized in that: said detecting device is the high Precision Detection device.
4. press the detection method that becomes secondary circuit N600 one point earth for one kind; It is characterized in that: may further comprise the steps: become the current signal that secondary voltage circuit N600 network injects a standard through pressure in operation; When press becoming secondary voltage circuit N600 network and have only one point earth, it is consistent that normalized current signal magnitude and detecting device detect known earth point electric current; When pressing change secondary voltage circuit N600 network that multipoint earthing is arranged; The normalized current signal that injects constitutes a plurality of loops; Normalized current forms shunting; This moment normalized current signal magnitude and detecting device to detect known earth point electric current inconsistent, thereby judging to press becomes the existence of secondary voltage circuit N600 network and above earth point at 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103273505A CN102435900A (en) | 2011-10-25 | 2011-10-25 | Detection device and method for one-point grounding of voltage transformation secondary circuit N600 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103273505A CN102435900A (en) | 2011-10-25 | 2011-10-25 | Detection device and method for one-point grounding of voltage transformation secondary circuit N600 |
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| CN102435900A true CN102435900A (en) | 2012-05-02 |
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| CN2011103273505A Pending CN102435900A (en) | 2011-10-25 | 2011-10-25 | Detection device and method for one-point grounding of voltage transformation secondary circuit N600 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197195A (en) * | 2013-03-29 | 2013-07-10 | 国家电网公司 | Detecting method and detecting system for multipoint earthing of voltage second loop neutral conductor network |
| CN103983895A (en) * | 2014-04-08 | 2014-08-13 | 广西电网公司电力科学研究院 | PT secondary circuit online N-line multipoint ground fault detection method and device |
| CN104360215A (en) * | 2014-11-12 | 2015-02-18 | 江苏省电力公司淮安供电公司 | Detection device for multi-point earthing fault of small bus N600 |
| CN105589004A (en) * | 2014-10-13 | 2016-05-18 | 国家电网公司 | Method and device for judging substation relay protection-used PT secondary common circuit single-point grounding |
| CN106772192A (en) * | 2016-12-12 | 2017-05-31 | 国家电网公司 | Secondary Circuit of Potential Transformer multipoint earthing detection means |
| CN107957568A (en) * | 2017-11-23 | 2018-04-24 | 中国南方电网有限责任公司超高压输电公司柳州局 | Secondary Circuit of Potential Transformer multipoint earthing Quick positioning instrument and lookup method |
| CN109596934A (en) * | 2018-11-30 | 2019-04-09 | 广州格兴全电力科技有限公司 | A kind of double split-core type meter mensurations of secondary circuit multipoint earthing |
| CN113985198A (en) * | 2021-10-19 | 2022-01-28 | 国网安徽省电力有限公司电力科学研究院 | Automatic detection device for secondary protection of power transmission and transformation facilities |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070210808A1 (en) * | 2006-03-02 | 2007-09-13 | Ellison Yang | Real-time multi-point ground resistance monitoring device |
| CN101726687A (en) * | 2009-12-10 | 2010-06-09 | 贵州电力试验研究院 | Method for monitoring one-point grounding of secondary neutral point of voltage transformer between transformer substation and power plant |
| EP2237057A1 (en) * | 2009-04-03 | 2010-10-06 | Siemens Aktiengesellschaft | Analysis device for analysing an electricity network |
| CN202305721U (en) * | 2011-10-25 | 2012-07-04 | 江苏省电力公司南通供电公司 | One-point grounding detection device for voltage-variable secondary circuits N600 |
-
2011
- 2011-10-25 CN CN2011103273505A patent/CN102435900A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070210808A1 (en) * | 2006-03-02 | 2007-09-13 | Ellison Yang | Real-time multi-point ground resistance monitoring device |
| EP2237057A1 (en) * | 2009-04-03 | 2010-10-06 | Siemens Aktiengesellschaft | Analysis device for analysing an electricity network |
| CN101726687A (en) * | 2009-12-10 | 2010-06-09 | 贵州电力试验研究院 | Method for monitoring one-point grounding of secondary neutral point of voltage transformer between transformer substation and power plant |
| CN202305721U (en) * | 2011-10-25 | 2012-07-04 | 江苏省电力公司南通供电公司 | One-point grounding detection device for voltage-variable secondary circuits N600 |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197195A (en) * | 2013-03-29 | 2013-07-10 | 国家电网公司 | Detecting method and detecting system for multipoint earthing of voltage second loop neutral conductor network |
| CN103983895A (en) * | 2014-04-08 | 2014-08-13 | 广西电网公司电力科学研究院 | PT secondary circuit online N-line multipoint ground fault detection method and device |
| CN103983895B (en) * | 2014-04-08 | 2016-08-17 | 广西电网公司电力科学研究院 | The online N line multipoint earth faults detection method of PT secondary circuit |
| CN105589004A (en) * | 2014-10-13 | 2016-05-18 | 国家电网公司 | Method and device for judging substation relay protection-used PT secondary common circuit single-point grounding |
| CN104360215A (en) * | 2014-11-12 | 2015-02-18 | 江苏省电力公司淮安供电公司 | Detection device for multi-point earthing fault of small bus N600 |
| CN104360215B (en) * | 2014-11-12 | 2017-10-03 | 江苏省电力公司淮安供电公司 | N600 multipoint earth faults detection means |
| CN106772192A (en) * | 2016-12-12 | 2017-05-31 | 国家电网公司 | Secondary Circuit of Potential Transformer multipoint earthing detection means |
| CN107957568A (en) * | 2017-11-23 | 2018-04-24 | 中国南方电网有限责任公司超高压输电公司柳州局 | Secondary Circuit of Potential Transformer multipoint earthing Quick positioning instrument and lookup method |
| CN109596934A (en) * | 2018-11-30 | 2019-04-09 | 广州格兴全电力科技有限公司 | A kind of double split-core type meter mensurations of secondary circuit multipoint earthing |
| CN109596934B (en) * | 2018-11-30 | 2021-06-01 | 广州格兴全电力科技有限公司 | Secondary circuit multipoint grounding double-clamp meter measuring method |
| CN113985198A (en) * | 2021-10-19 | 2022-01-28 | 国网安徽省电力有限公司电力科学研究院 | Automatic detection device for secondary protection of power transmission and transformation facilities |
| CN113985198B (en) * | 2021-10-19 | 2023-12-15 | 国网安徽省电力有限公司电力科学研究院 | Automatic detection device for secondary protection of power transmission and transformation facility |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU ELECTRIC POWER COMPANY STATE GRID CORPORAT Effective date: 20121218 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121218 Address after: 226006 Jiangsu Province, Nantong City Chongchuan District Youth Road No. 111 Applicant after: Nantong Power Supply Company, Jiangsu Electric Power Co., Ltd. Applicant after: Jiangsu Electric Power Company Applicant after: State Grid Corporation of China Address before: 226006 Jiangsu Province, Nantong City Chongchuan District Youth Road No. 111 Applicant before: Nantong Power Supply Company, Jiangsu Electric Power Co., Ltd. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120502 |