CN102788933A - Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault - Google Patents
Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault Download PDFInfo
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- CN102788933A CN102788933A CN2012102368521A CN201210236852A CN102788933A CN 102788933 A CN102788933 A CN 102788933A CN 2012102368521 A CN2012102368521 A CN 2012102368521A CN 201210236852 A CN201210236852 A CN 201210236852A CN 102788933 A CN102788933 A CN 102788933A
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Abstract
The invention relates to a method for utilizing an automatic switch-out controller to search a power grid low-current single-phase ground fault. The method comprises the following specific steps: (1) a switch-out sequence table is drawn up and led in; (2) whether the low-current single-phase ground fault happens is judged; (3) when the low-current single-phase ground fault happens, the automatic switch-out controller performs test switch-out. The method changes the existing situation that transformer substation on-duty staff perform test switch-out to search the low-current single-phase ground fault, and greatly reduces working capacity of the transformer substation on-duty staff. Meanwhile, due to utilization of the automatic switch-out controller, the switch-out sequence table can be used to perform switch-out to search the low-current single-phase ground fault, so that the method is quicker and more accurate, greatly shortens the grounding time of the device, and improves the power supply reliability.
Description
Technical field
The present invention relates to a kind of method of drawing the road controller to search the little electric current singlephase earth fault of electrical network automatically of utilizing.
Background technology
Data shows according to statistics, and 70% fault all is an earth fault in the line fault, and singlephase earth fault accounts for more than 80% of low current neutral grounding system fault.In small current neutral grounding system, single-phase earthing is a kind of common provisional fault, mostly occurs at moist, rainy weather.After single-phase earthing took place, the fault phase-to-ground voltage reduced, and the phase voltage of non-fault two phases raises, but line voltage is still symmetrical, thereby did not influence the continuous power supply to the user, and system can move 1～2h, and this also is the great advantage of small current neutral grounding system.But electrical network long-time running when if singlephase earth fault takes place,, possibly cause that the weak link of insulation is breakdown, develop into phase fault, accident is enlarged, influence user's normal electricity consumption because of two phase-to-ground voltages of non-fault raise 1.73 times.Along with increasing of feeder line, capacitance current is also increasing, and long-play is prone to make fault progression to become or multipoint earthing short circuit at 2; Arc grounding also can cause the total system superpotential; And then damage equipment, the harm system safety operation is so must in time find faulty line to excise.
Therefore, the operator on duty of transformer station must be familiar with the disposal route of earth fault, when singlephase earth fault takes place, must in time find faulty line to excise.When small current system ground connection takes place in transformer station; Often to try to draw many outlets just can find out the circuit of real ground connection; This just makes the operator on duty bear very big workload, makes that also the equipment ground time is longer, has influenced the normal power supply of non-ground path; Reduce power supply reliability, be unfavorable for the safe operation of grid equipment.
Summary of the invention
Technical matters to be solved by this invention provides a kind of method of drawing the road controller to search the little electric current singlephase earth fault of electrical network automatically of utilizing.
The technical solution adopted for the present invention to solve the technical problems:
Step of the present invention is following:
(1) the road sequence table is drawn in establishment and importing:
Add up transformer station's single-phase low current grounding total degree along separate routes in each transformer station 1 year, and the road sequence table is drawn in establishment according to this, and will draw the road sequence table to import the said road controller that draws automatically;
Said single-phase low current grounding total degree is ground connection, tripping operation total degree, saidly draws the road sequence table to sort by ground connection, tripping operation total degree order from more to less;
(2) judge whether to take place little electric current singlephase earth fault;
(3) when little electric current singlephase earth fault takes place, try to draw by the said road controller that draws automatically:
Said examination is drawn and is divided into that direct examination is drawn and after agreeing, tries to draw, and said direct examination is drawn to not notifying corresponding scheduling by drawing the road device directly to try to draw automatically;
Saidly after corresponding scheduling agreement, just can try to draw through agreeing that the back examination is drawn to needs;
Try in proper order to draw according to the said road of drawing of drawing the road sequence table to confirm, examination draws step following:
A. draw back bus or section switch, dwindle the earth fault scope;
B. dock all residues of location bus along separate routes, the road sequence table tries to draw in proper order by drawing, the co-shunt isolating switch, draws, closes order as follows:
1. sky fills circuit; 2. double-circuit line;
3. the earth fault circuit that takes place frequently;
4. general aspects load long transmission line;
5. general aspects load circuit;
6. capacitor;
7. the station is with becoming;
8. have the responsible consumer circuit;
(4) examination pull finish after, confirm that each isolating switch breaks off, delay time wait SCADA Refresh Data 10 seconds; Said each isolating switch is bus, section switch and shunt circuitbreaker;
(5) observe whether involution of fault-signal, if not involution of signal is back to step (3);
(6) if signal return then finishes examination and draws.
Good effect of the present invention is following:
The present invention has changed by the artificial examination of the operator on duty of transformer station and has drawn the existing situation of searching little electric current single-phase earthing, has reduced the operator on duty's of transformer station workload greatly.Simultaneously, draw the road controller automatically owing to utilize, more quick, accurate according to drawing the road sequence table to draw the road to search little electric current single-phase earthing, significantly shortened the equipment ground time, improved power supply reliability.
Description of drawings
Accompanying drawing 1 is a process flow diagram of the present invention.
Accompanying drawing 2 is for draw the program flow diagram of road controller automatically.
Accompanying drawing 3-6 is the screenshot capture that draws after the road controller is drawn in road sequence table input automatically.
Embodiment
Shown in accompanying drawing 1, the step of present embodiment is following:
(1) the road sequence table is drawn in establishment and importing:
Add up transformer station's single-phase low current grounding total degree along separate routes in each transformer station 1 year, and the road sequence table is drawn in establishment according to this, and will draw the road sequence table to import the said road controller that draws automatically;
Said single-phase low current grounding total degree is ground connection, tripping operation total degree, saidly draws the road sequence table to sort by ground connection, tripping operation total degree order from more to less;
When little electric current single-phase earthing, tripping operation take place, should in time fill in, upgrade this and draw road sequence table (1 year statistics once), carry out dynamic management, the road sequence table input of drawing after upgrading is drawn in the controller of road automatically;
(2) judge whether to take place little electric current singlephase earth fault;
(3) when little electric current singlephase earth fault takes place, try to draw by the said road controller that draws automatically:
Said examination is drawn and is divided into that direct examination is drawn and after agreeing, tries to draw, and said direct examination is drawn to not notifying corresponding scheduling by drawing the road device directly to try to draw automatically;
Saidly after corresponding scheduling agreement, just can try to draw through agreeing that the back examination is drawn to needs;
Try in proper order to draw according to the said road of drawing of drawing the road sequence table to confirm, examination draws step following:
A. draw back bus or section switch, dwindle the earth fault scope;
B. dock all residues of location bus along separate routes, the road sequence table tries to draw in proper order by drawing, the co-shunt isolating switch, draws, closes order as follows:
1. sky fills circuit; 2. double-circuit line;
3. the earth fault circuit that takes place frequently;
4. general aspects load long transmission line;
5. general aspects load circuit;
6. capacitor;
7. the station is with becoming;
8. have the responsible consumer circuit;
(4) examination pull finish after, confirm that each isolating switch breaks off, delay time wait SCADA Refresh Data 10 seconds; Said each isolating switch is bus, section switch and shunt circuitbreaker;
(5) observe whether involution of fault-signal, if not involution of signal is back to step (3);
(6) if signal return then finishes examination and draws.
The said road controller that draws is automatically realized by one section program of under the C++ programmed environment, being write that then this program is write with the small current neutral grounding accident of a double-bus transformer station.Program flow diagram is seen Fig. 2.
Fig. 3-Fig. 6 is the screenshot capture that draws after the road controller is drawn in road sequence table input automatically.
Claims (1)
1. a utilization draws the road controller to search the method for the little electric current singlephase earth fault of electrical network automatically, it is characterized in that step is following:
(1) the road sequence table is drawn in establishment and importing:
Add up transformer station's single-phase low current grounding total degree along separate routes in each transformer station 1 year, and the road sequence table is drawn in establishment according to this, and will draw the road sequence table to import the said road controller that draws automatically;
Said single-phase low current grounding total degree is ground connection, tripping operation total degree, saidly draws the road sequence table to sort by ground connection, tripping operation total degree order from more to less;
(2) judge whether to take place little electric current singlephase earth fault;
(3) when little electric current singlephase earth fault takes place, try to draw by the said road controller that draws automatically:
Said examination is drawn and is divided into that direct examination is drawn and after agreeing, tries to draw, and said direct examination is drawn to not notifying corresponding scheduling by drawing the road device directly to try to draw automatically;
Saidly after corresponding scheduling agreement, just can try to draw through agreeing that the back examination is drawn to needs;
Try in proper order to draw according to the said road of drawing of drawing the road sequence table to confirm, examination draws step following:
A. draw back bus or section switch, dwindle the earth fault scope;
B. dock all residues of location bus along separate routes, the road sequence table tries to draw in proper order by drawing, the co-shunt isolating switch, draws, closes order as follows:
1. sky fills circuit; 2. double-circuit line;
3. the earth fault circuit that takes place frequently;
4. general aspects load long transmission line;
5. general aspects load circuit;
6. capacitor;
7. the station is with becoming;
8. have the responsible consumer circuit;
(4) examination pull finish after, confirm that each isolating switch breaks off, delay time wait SCADA Refresh Data 10 seconds; Said each isolating switch is bus, section switch and shunt circuitbreaker;
(5) observe whether involution of fault-signal, if not involution of signal is back to step (3);
(6) if signal return then finishes examination and draws.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102368521A CN102788933A (en) | 2012-09-25 | 2012-09-25 | Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102368521A CN102788933A (en) | 2012-09-25 | 2012-09-25 | Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault |
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| CN102788933A true CN102788933A (en) | 2012-11-21 |
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| CN2012102368521A Pending CN102788933A (en) | 2012-09-25 | 2012-09-25 | Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066575A (en) * | 2012-12-24 | 2013-04-24 | 上海电力学院 | Control method of rapidly finding fault |
| CN103353573A (en) * | 2013-06-18 | 2013-10-16 | 国家电网公司 | Rapid test stopping method of power grid grounding fault |
| CN103543384A (en) * | 2013-10-15 | 2014-01-29 | 国家电网公司 | Method for determining bus ground faults |
| CN103954879A (en) * | 2014-05-09 | 2014-07-30 | 浙江大学 | Method for differentiating fault properties of same-rod double-circuit line with paralleling reactor |
| CN104377666A (en) * | 2013-08-16 | 2015-02-25 | 刘晓博 | High-speed trial wiring strategy for ground fault of electric power system and trial wiring circuit topology |
| CN105867270A (en) * | 2016-04-08 | 2016-08-17 | 国电南瑞科技股份有限公司 | Power transmission and transformation equipment state abnormity identification and emergency response scheme automatic pushing method |
| CN106940411A (en) * | 2017-04-21 | 2017-07-11 | 国网江苏省电力公司宿迁供电公司 | A kind of single-phase ground fault line selecting method of small-electric current grounding system |
| CN107167701A (en) * | 2017-03-06 | 2017-09-15 | 国网浙江义乌市供电公司 | Automatically method is sentenced in choosing to distribution singlephase earth fault circuit |
| CN107329035A (en) * | 2017-07-31 | 2017-11-07 | 国电南瑞科技股份有限公司 | A kind of quick examination pulling method of automatic dispatching system small current ground connection and system |
| CN109164339A (en) * | 2018-07-27 | 2019-01-08 | 国电南瑞科技股份有限公司 | The statistics and methods of exhibiting of road sequence accuracy rate are drawn in a kind of bus small current neutral grounding |
| CN109523857A (en) * | 2018-12-10 | 2019-03-26 | 国网河北省电力有限公司培训中心 | The determination method and device of substation's pending operation |
| CN110146766A (en) * | 2018-11-16 | 2019-08-20 | 国网江苏省电力有限公司盐城供电分公司 | The processing method of single-phase earthing signal in a kind of Loop Closing Operation |
| CN110488154A (en) * | 2019-08-28 | 2019-11-22 | 国网四川省电力公司成都供电公司 | A kind of small current earthing wire-selecting method for scheduling station end |
| CN110927518A (en) * | 2019-11-15 | 2020-03-27 | 国网江苏省电力有限公司常州供电分公司 | Single-phase earth fault route-pulling and route-selecting method for small current grounding system |
| CN113884817A (en) * | 2021-10-27 | 2022-01-04 | 国网江苏省电力有限公司镇江供电分公司 | Single-phase earth fault grounding searching method for small current grounding system |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066575B (en) * | 2012-12-24 | 2016-09-14 | 上海电力学院 | Quickly search the control method of fault |
| CN103066575A (en) * | 2012-12-24 | 2013-04-24 | 上海电力学院 | Control method of rapidly finding fault |
| CN103353573A (en) * | 2013-06-18 | 2013-10-16 | 国家电网公司 | Rapid test stopping method of power grid grounding fault |
| CN104377666A (en) * | 2013-08-16 | 2015-02-25 | 刘晓博 | High-speed trial wiring strategy for ground fault of electric power system and trial wiring circuit topology |
| CN103543384A (en) * | 2013-10-15 | 2014-01-29 | 国家电网公司 | Method for determining bus ground faults |
| CN103954879A (en) * | 2014-05-09 | 2014-07-30 | 浙江大学 | Method for differentiating fault properties of same-rod double-circuit line with paralleling reactor |
| CN103954879B (en) * | 2014-05-09 | 2016-11-02 | 浙江大学 | A kind of band shunt reactor double circuit lines character method of discrimination |
| CN105867270A (en) * | 2016-04-08 | 2016-08-17 | 国电南瑞科技股份有限公司 | Power transmission and transformation equipment state abnormity identification and emergency response scheme automatic pushing method |
| CN107167701A (en) * | 2017-03-06 | 2017-09-15 | 国网浙江义乌市供电公司 | Automatically method is sentenced in choosing to distribution singlephase earth fault circuit |
| CN106940411B (en) * | 2017-04-21 | 2019-05-31 | 国网江苏省电力公司宿迁供电公司 | A kind of single-phase ground fault line selecting method of small-electric current grounding system |
| CN106940411A (en) * | 2017-04-21 | 2017-07-11 | 国网江苏省电力公司宿迁供电公司 | A kind of single-phase ground fault line selecting method of small-electric current grounding system |
| CN107329035A (en) * | 2017-07-31 | 2017-11-07 | 国电南瑞科技股份有限公司 | A kind of quick examination pulling method of automatic dispatching system small current ground connection and system |
| CN109164339A (en) * | 2018-07-27 | 2019-01-08 | 国电南瑞科技股份有限公司 | The statistics and methods of exhibiting of road sequence accuracy rate are drawn in a kind of bus small current neutral grounding |
| CN110146766A (en) * | 2018-11-16 | 2019-08-20 | 国网江苏省电力有限公司盐城供电分公司 | The processing method of single-phase earthing signal in a kind of Loop Closing Operation |
| CN110146766B (en) * | 2018-11-16 | 2021-09-03 | 国网江苏省电力有限公司盐城供电分公司 | Method for processing single-phase grounding signal in closed-loop operation |
| CN109523857A (en) * | 2018-12-10 | 2019-03-26 | 国网河北省电力有限公司培训中心 | The determination method and device of substation's pending operation |
| CN110488154A (en) * | 2019-08-28 | 2019-11-22 | 国网四川省电力公司成都供电公司 | A kind of small current earthing wire-selecting method for scheduling station end |
| CN110927518A (en) * | 2019-11-15 | 2020-03-27 | 国网江苏省电力有限公司常州供电分公司 | Single-phase earth fault route-pulling and route-selecting method for small current grounding system |
| CN110927518B (en) * | 2019-11-15 | 2021-10-08 | 国网江苏省电力有限公司常州供电分公司 | Single-phase earth fault route-pulling and route-selecting method for small current grounding system |
| CN113884817A (en) * | 2021-10-27 | 2022-01-04 | 国网江苏省电力有限公司镇江供电分公司 | Single-phase earth fault grounding searching method for small current grounding system |
| CN113884817B (en) * | 2021-10-27 | 2023-09-01 | 国网江苏省电力有限公司镇江供电分公司 | Single-phase grounding fault grounding searching method for small-current grounding system |
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Application publication date: 20121121 |