CN113391202A - Method for judging closing state of isolating switch - Google Patents
Method for judging closing state of isolating switch Download PDFInfo
- Publication number
- CN113391202A CN113391202A CN202110764560.4A CN202110764560A CN113391202A CN 113391202 A CN113391202 A CN 113391202A CN 202110764560 A CN202110764560 A CN 202110764560A CN 113391202 A CN113391202 A CN 113391202A
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- China
- Prior art keywords
- judging
- set value
- closing
- isolating switch
- electric field
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005684 electric field Effects 0.000 claims abstract description 18
- 230000007547 defect Effects 0.000 claims abstract description 9
- 238000010248 power generation Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention belongs to the field of power equipment, and particularly relates to a method for judging the closing state of an isolating switch. The method comprises the following steps: 1) the electric field sensor starts working, whether switching-on is carried out or not is judged according to the electric field intensity, when the electric field intensity is lower than a set value, the isolating switch is in a switching-off state, and the judgment result is that switching-on is not carried out; when the electric field intensity is higher than a set value, the isolating switch is in a closing state. 2) When the isolating switch is in a closing state, the temperature sensor starts to work; detecting the temperature of a closing contact area, and judging a closing heating defect when the temperature is higher than a set value; and when the temperature is lower than a set value, judging that the switch-on is not heated. 3) When the temperature sensor judges that the switch-on is not heated, the partial discharge sensor starts to work; when the power generation amount and the partial discharge frequency are detected to be higher than a set value, judging the defect of closing partial discharge; and when the detection value is lower than the set value, the basic power generation amount and the partial discharge frequency, judging that the closing state is normal. The manual intervention is not needed, and the judgment accuracy is high.
Description
Technical Field
The invention belongs to the field of power equipment, and particularly relates to a method for judging the closing state of an isolating switch.
Background
In the prior art, the number of isolating switches in a power grid is large, and the states of the isolating switches lack effective sensing means. Statistics shows that the bad closing condition is the most main defect of the isolating switch, and the closing state judgment is also detected by adopting an original manual observation method, so that the improvement is urgently needed. The application provides a method for judging the closing state of an isolating switch, which is used for judging the closing state of the isolating switch based on detection results of an electric field sensor, a temperature sensor and an ultrahigh frequency partial discharge sensor, does not need manual intervention and has high judgment accuracy.
Disclosure of Invention
The invention aims to provide the method for judging the closing state of the isolating switch, which has high judgment accuracy without manual intervention.
The technical solution of the invention is as follows: a method for judging the closing state of an isolating switch is characterized by comprising the following steps:
1) the electric field sensor starts working, whether switching-on is carried out or not is judged according to the electric field intensity, when the electric field intensity is lower than a set value, the isolating switch is in a switching-off state, and the judgment result is that switching-on is not carried out; when the electric field intensity is higher than a set value, the isolating switch is in a closing state.
2) When the isolating switch is in a closing state, the temperature sensor starts to work; detecting the temperature of a closing contact area, and judging a closing heating defect when the temperature is higher than a set value; and when the temperature is lower than a set value, judging that the switch-on is not heated.
3) When the temperature sensor judges that the switch-on is not heated, the partial discharge sensor starts to work; when the power generation amount and the partial discharge frequency are detected to be higher than a set value, judging the defect of closing partial discharge; and when the detection value is lower than the set value, the basic power generation amount and the partial discharge frequency, judging that the closing state is normal.
The invention has the beneficial effects that: the closing state of the isolating switch is judged based on the detection results of the electric field sensor, the temperature sensor and the local discharge sensor, manual intervention is not needed, and the judgment accuracy rate is high.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
Referring to fig. 1, a method for determining a closing state of an isolation switch includes the following steps:
1) the electric field sensor starts working, whether switching-on is carried out or not is judged according to the electric field intensity, when the electric field intensity is lower than a set value, the isolating switch is in a switching-off state, and the judgment result is that switching-on is not carried out; when the electric field intensity is higher than a set value, the isolating switch is in a closing state.
2) When the isolating switch is in a closing state, the temperature sensor starts to work. Detecting the temperature of a closing contact area by adopting an infrared detection principle, and judging a closing heating defect when the temperature is higher than a set value; and when the temperature is lower than a set value, judging that the switch-on is not heated.
3) When the temperature sensor judges that the switch-on is not heated, the partial discharge sensor starts to work. When the power generation amount and the partial discharge frequency are detected to be higher than a set value, judging the defect of closing partial discharge; and when the detection value is lower than the set value, the basic power generation amount and the partial discharge frequency, judging that the closing state is normal.
The foregoing description is only exemplary of the invention and is not intended to limit the spirit of the invention.
Claims (1)
1. A method for judging the closing state of an isolating switch is characterized by comprising the following steps:
1) the electric field sensor starts working, whether switching-on is carried out or not is judged according to the electric field intensity, when the electric field intensity is lower than a set value, the isolating switch is in a switching-off state, and the judgment result is that switching-on is not carried out; when the electric field intensity is higher than a set value, the isolating switch is in a closing state;
2) when the isolating switch is in a closing state, the temperature sensor starts to work; detecting the temperature of a closing contact area, and judging a closing heating defect when the temperature is higher than a set value; when the temperature is lower than a set value, judging that the switch-on is not heated;
3) when the temperature sensor judges that the switch-on is not heated, the partial discharge sensor starts to work; when the power generation amount and the partial discharge frequency are detected to be higher than a set value, judging the defect of closing partial discharge; and when the detection value is lower than the set value, the basic power generation amount and the partial discharge frequency, judging that the closing state is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764560.4A CN113391202A (en) | 2021-07-07 | 2021-07-07 | Method for judging closing state of isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764560.4A CN113391202A (en) | 2021-07-07 | 2021-07-07 | Method for judging closing state of isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113391202A true CN113391202A (en) | 2021-09-14 |
Family
ID=77625348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110764560.4A Pending CN113391202A (en) | 2021-07-07 | 2021-07-07 | Method for judging closing state of isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113391202A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241008A (en) * | 2013-06-20 | 2014-12-24 | 沈阳工业大学 | Method and device for detecting breaking and closing positions of vacuum circuit breaker contacts |
| CN104793132A (en) * | 2015-04-21 | 2015-07-22 | 西安工程大学 | Disconnecting switch contact state detection device and method based on electric field sensor |
| CN105388400A (en) * | 2014-08-29 | 2016-03-09 | Ls产电株式会社 | System for analysis of partial discharge defects of gas insulated switchgear |
| CN107785194A (en) * | 2017-11-16 | 2018-03-09 | 国家电网公司 | The disconnecting switch division position discriminating gear and method of a kind of recognizable contact condition |
| CN108919065A (en) * | 2018-05-16 | 2018-11-30 | 国网浙江省电力有限公司电力科学研究院 | GIS ultrahigh frequency partial discharge monitoring management system |
| CN109787095A (en) * | 2019-03-06 | 2019-05-21 | 四川赛康智能科技股份有限公司 | One kind being based on various dimensions characteristic parameter power switch cabinet state on_line monitoring device |
| CN113049920A (en) * | 2019-12-10 | 2021-06-29 | 陕西公众智能科技有限公司 | Switch cabinet partial discharge and temperature online detection system and detection method thereof |
-
2021
- 2021-07-07 CN CN202110764560.4A patent/CN113391202A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241008A (en) * | 2013-06-20 | 2014-12-24 | 沈阳工业大学 | Method and device for detecting breaking and closing positions of vacuum circuit breaker contacts |
| CN105388400A (en) * | 2014-08-29 | 2016-03-09 | Ls产电株式会社 | System for analysis of partial discharge defects of gas insulated switchgear |
| CN104793132A (en) * | 2015-04-21 | 2015-07-22 | 西安工程大学 | Disconnecting switch contact state detection device and method based on electric field sensor |
| CN107785194A (en) * | 2017-11-16 | 2018-03-09 | 国家电网公司 | The disconnecting switch division position discriminating gear and method of a kind of recognizable contact condition |
| CN108919065A (en) * | 2018-05-16 | 2018-11-30 | 国网浙江省电力有限公司电力科学研究院 | GIS ultrahigh frequency partial discharge monitoring management system |
| CN109787095A (en) * | 2019-03-06 | 2019-05-21 | 四川赛康智能科技股份有限公司 | One kind being based on various dimensions characteristic parameter power switch cabinet state on_line monitoring device |
| CN113049920A (en) * | 2019-12-10 | 2021-06-29 | 陕西公众智能科技有限公司 | Switch cabinet partial discharge and temperature online detection system and detection method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王睿，邓小桃: "《高压电技术》", 30 April 2014 * |
| 荣命哲，王小华，杨爱军: "《电气设备状态检测》", 31 December 2019 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210914 |
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| RJ01 | Rejection of invention patent application after publication |