CN105610137A - Centralized power-distribution-system single phase grounding fault elimination method - Google Patents
Centralized power-distribution-system single phase grounding fault elimination method Download PDFInfo
- Publication number
- CN105610137A CN105610137A CN201510619720.0A CN201510619720A CN105610137A CN 105610137 A CN105610137 A CN 105610137A CN 201510619720 A CN201510619720 A CN 201510619720A CN 105610137 A CN105610137 A CN 105610137A
- Authority
- CN
- China
- Prior art keywords
- earth fault
- circuit
- switch
- single phase
- fault
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Locating Faults (AREA)
Abstract
The invention provides a technology scheme of a centralized power-distribution-system single phase grounding fault elimination method. The method in the scheme is characterized by firstly determining a grounding fault line; then further verifying whether the line has a fault; and then from an end piece, successively disconnecting section switches and finally disconnecting an outgoing line switch; checking according to a sequence and determining whether there is grounding short circuit alarm; and finally determining a grounding short circuit point. By using the method in the scheme, power-distribution-network single phase grounding fault processing efficiency is increased; work intensity of regulation and control personnel and line patrol personnel is mitigated; distribution network power supply reliability is increased and outage time of a faulty section is shortened.
Description
Technical field
What the present invention relates to is a kind of concentrated distribution system single phase earthing troubleshooting methodology, can solve the problem that current one-phase earthing failure in electric distribution network location is difficult, power off time is long, improve one-phase earthing failure in electric distribution network treatment effeciency, alleviate regulation and control personnel, track walker's working strength, improve Reliability of Power Supplying Net Work.
Background technology
In the prior art, known technology is that power distribution network mostly is neutral point non-direct grounding system, and when singlephase earth fault, fault current is little, is difficult to confirm fast trouble point. When earth fault is processed, existing line selection device for low current accuracy rate is higher, but electrical power distribution automatization system does not possess the automatic processing capacity of singlephase earth fault, scene still adopts the methods such as examination is drawn, artificial line walking to determine abort situation, regulation and control personnel operate the time that a switch approximately needs 2-3 minute, simultaneously, whether manual observation ground signalling disappears also needs to expend the long period, while causing earth fault, non-fault zone power off time is long, bring tremendous economic loss to client, reduced the power supply reliability of power distribution network. This is the existing weak point of prior art.
Summary of the invention
Object of the present invention is exactly for the existing deficiency of prior art, and provide a kind of technical scheme of concentrated distribution system single phase earthing troubleshooting methodology, the method of this scheme improves one-phase earthing failure in electric distribution network treatment effeciency, alleviate regulation and control personnel, track walker's working strength, improve Reliability of Power Supplying Net Work, reduce the power off time of fault section.
This programme is achieved by the following technical measures: a kind of concentrated distribution system single phase earthing troubleshooting methodology, comprise the outlet switch and the multiple block switch that are successively set in supply line of transformer station, and it is characterized in that comprising following method:
1) judge the circuit at earth fault place;
2) the latter end block switch in circuit is disconnected, check and have or not earth fault to report to the police, if had, earth fault, at latter end, if do not had, enters step 3);
3) start to close block switch successively until outlet switch from second block switch of circuit latter end, check and have or not grounding alarm, if reported to the police, earth fault is positioned at the load side of this block switch or outlet switch, stop interval judgement, the block switch at earth fault two ends is disconnected and locking;
4) judge that earth fault whether between outlet switch and first block switch, if it is do not power, otherwise closed outlet switch, to there being earth fault segmentation to power near the segmentation of transformer substation side;
5) whether failure judgement earth point is the least significant end interval of circuit, if, keep this block switch to disconnect, do not give the power supply of this interval, if not, from the latter end afterbody block switch of this circuit forward, the remote control block switch of fault section back segment that closes, is restored electricity the non-fault section behind this line fault district by another circuit successively.
In described step 1), use line selection device for low current to judge the circuit at earth fault place.
In described step 1), while judging earth fault, also has verification step, first disconnect the outlet switch of this circuit, and countdown, if disappear in the interior earth fault alarm signal of time T 1, confirm that earth fault is on this circuit, if do not disappear in the interior earth fault alarm signal of time T 1, represent circuit misjudgment.
The time interval of closing between adjacent sectional switch is also T2.
Described step 2) in close after latter end block switch, report to the police if send earth fault in time T 3, earth fault is at latter end, T3 ﹤ T2.
Described T3 is 5/7 of T2.
Described T1 is identical with T2, and 5s≤T2≤8s.
In described step 4), realize two connection power supplies between circuit by interconnection switch.
The beneficial effect of this programme can be learnt according to the narration to such scheme, due in this scheme, first determine earth fault line, whether then carry out further checking is this line fault, then from latter end, disconnecting successively block switch, is finally outlet switch, look into so in order and see if there is ground short circuit warning, finally determine ground short circuit point. As can be seen here, the present invention compared with prior art, has outstanding substantive distinguishing features and significant progressive, and the beneficial effect of its enforcement is also apparent.
Brief description of the drawings
Fig. 1 is the structural representation of the specific embodiment of the invention.
Detailed description of the invention
For clearly demonstrating the technical characterstic of this programme, below by a detailed description of the invention, and in conjunction with its accompanying drawing, this programme is set forth.
Can find out by accompanying drawing, the concentrated distribution system single phase earthing troubleshooting methodology of the present embodiment, comprise the outlet switch CB1, the CB2 that are successively set in supply line of transformer station and multiple block switch S1, S2, S3, S4, S5, S6, the present embodiment is mainly that circuit 1 is carried out to the eliminating of short circuit grounding fault, and concrete steps are as follows:
1) judge the circuit 1 at earth fault place;
2) the latter end block switch S3 in circuit 1 is disconnected, check and have or not earth fault to report to the police, if had, earth fault, at latter end, if do not had, enters step 3);
3) start to close block switch successively until outlet switch CB1 from second block switch S2 of circuit latter end, check and have or not grounding alarm, if reported to the police, earth fault is positioned at the load side of this block switch or outlet switch, stop interval judgement, the block switch at earth fault two ends is disconnected and locking;
4) judge that earth fault is whether between outlet switch CB1 and first block switch S1, if it is do not power, otherwise, closed outlet switch CB1, power near the segmentation of transformer substation side to there being earth fault segmentation, if short circuit grounding point is F, it is the sectional power supply between CB1, S1, S2;
5) whether failure judgement earth point is the least significant end interval of circuit 1, if, keep this block switch to disconnect, do not give the power supply of this interval, if not, from the latter end afterbody block switch of this circuit forward, the remote control block switch of fault section back segment that closes, is restored electricity the non-fault section behind this line fault district by circuit 2 successively.
In described step 1), use line selection device for low current to judge the circuit at earth fault place. In described step 1), while judging earth fault, also has verification step, first the outlet switch of open-circuit line 1, and countdown, if disappear in the interior earth fault alarm signal of time T 1, confirm that earth fault is on this circuit, if do not disappear in the interior earth fault alarm signal of time T 1, represent circuit misjudgment.
The time interval of closing between adjacent sectional switch is also T2. Described step 2) in close after latter end block switch, report to the police if send earth fault in time T 3, earth fault is at latter end, T3 ﹤ T2.
Described T3 is 5/7 of T2.
Described T1 is identical with T2, and 5s≤T2≤8s.
In described step 4), realize two connection power supplies between circuit by interconnection switch L1.
The present invention is not limited in above-mentioned detailed description of the invention, and variation, remodeling, interpolation or replacement that those of ordinary skill in the art make in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (8)
1. a concentrated distribution system single phase earthing troubleshooting methodology, comprises the outlet switch and the multiple block switch that are successively set in supply line of transformer station, it is characterized in that comprising following method:
1) judge the circuit at earth fault place;
2) the latter end block switch in circuit is disconnected, check and have or not earth fault to report to the police, if had, earth fault, at latter end, if do not had, enters step 3);
3) start to close block switch successively until outlet switch from second block switch of circuit latter end, check and have or not grounding alarm, if reported to the police, earth fault is positioned at the load side of this block switch or outlet switch, stop interval judgement, the block switch at earth fault two ends is disconnected and locking;
4) judge that earth fault whether between outlet switch and first block switch, if it is do not power, otherwise closed outlet switch, to there being earth fault segmentation to power near the segmentation of transformer substation side;
5) whether failure judgement earth point is the least significant end interval of circuit, if, keep this block switch to disconnect, do not give the power supply of this interval, if not, from the latter end afterbody block switch of this circuit forward, the remote control block switch of fault section back segment that closes, is restored electricity the non-fault section behind this line fault district by another circuit successively.
2. concentrated distribution system single phase earthing troubleshooting methodology according to claim 1, is characterized in that: in described step 1), use line selection device for low current to judge the circuit at earth fault place.
3. concentrated distribution system single phase earthing troubleshooting methodology according to claim 1, it is characterized in that: in described step 1), while judging earth fault, also have verification step, first disconnect the outlet switch of this circuit, and countdown, if disappear in the interior earth fault alarm signal of time T 1, confirm that earth fault is on this circuit, if do not disappear in the interior earth fault alarm signal of time T 1, represent circuit misjudgment.
4. concentrated distribution system single phase earthing troubleshooting methodology according to claim 1, is characterized in that: the time interval of closing between adjacent sectional switch is also T2.
5. concentrated distribution system single phase earthing troubleshooting methodology according to claim 4, is characterized in that: described step 2) in close after latter end block switch, report to the police if send earth fault in time T 3, earth fault is at latter end, T3 ﹤ T2.
6. concentrated distribution system single phase earthing troubleshooting methodology according to claim 5, is characterized in that: described T3 is T2 5/7.
7. according to the concentrated distribution system single phase earthing troubleshooting methodology described in claim 3 or 4, it is characterized in that: described T1 is identical with T2, and 5s≤T2≤8s.
8. concentrated distribution system single phase earthing troubleshooting methodology according to claim 1, is characterized in that: in described step 4), realize two connection power supplies between circuit by interconnection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619720.0A CN105610137A (en) | 2015-09-25 | 2015-09-25 | Centralized power-distribution-system single phase grounding fault elimination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619720.0A CN105610137A (en) | 2015-09-25 | 2015-09-25 | Centralized power-distribution-system single phase grounding fault elimination method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105610137A true CN105610137A (en) | 2016-05-25 |
Family
ID=55989770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510619720.0A Pending CN105610137A (en) | 2015-09-25 | 2015-09-25 | Centralized power-distribution-system single phase grounding fault elimination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105610137A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287295A (en) * | 2018-01-29 | 2018-07-17 | 山东钢铁股份有限公司 | Power circuit earth fault location lookup method and system |
| CN113295965A (en) * | 2021-05-25 | 2021-08-24 | 国网山东省电力公司济南市济阳区供电公司 | Distribution network ground fault positioning method, system and terminal |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258485A (en) * | 2005-03-15 | 2006-09-28 | Hokuriku Electric Power Co Inc:The | System for localizing ground fault section |
| CN102081131A (en) * | 2010-12-02 | 2011-06-01 | 河南省电力公司南阳供电公司 | Grounding point finding method for low-current grounding system of urban power grid |
| CN102611086A (en) * | 2012-03-27 | 2012-07-25 | 许继集团有限公司 | Centralized protection system and method for region distribution network |
| CN103001193A (en) * | 2012-11-13 | 2013-03-27 | 山东电力集团公司济南供电公司 | Centralized feeder automation control method for demarcation fault processing |
| CN103022992A (en) * | 2012-11-23 | 2013-04-03 | 山东电力集团公司 | Feeder ground positioning method based on dispersion zero sequence voltage detection |
| CN203811747U (en) * | 2014-02-20 | 2014-09-03 | 国投新集能源股份有限公司 | A small current grounding line selection system |
| CN104090208A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | Voltage-type power distribution network fault processing method |
| CN104767182A (en) * | 2015-01-20 | 2015-07-08 | 国家电网公司 | Fault processing method for overhead line type power distribution network |
-
2015
- 2015-09-25 CN CN201510619720.0A patent/CN105610137A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258485A (en) * | 2005-03-15 | 2006-09-28 | Hokuriku Electric Power Co Inc:The | System for localizing ground fault section |
| CN102081131A (en) * | 2010-12-02 | 2011-06-01 | 河南省电力公司南阳供电公司 | Grounding point finding method for low-current grounding system of urban power grid |
| CN102611086A (en) * | 2012-03-27 | 2012-07-25 | 许继集团有限公司 | Centralized protection system and method for region distribution network |
| CN103001193A (en) * | 2012-11-13 | 2013-03-27 | 山东电力集团公司济南供电公司 | Centralized feeder automation control method for demarcation fault processing |
| CN103022992A (en) * | 2012-11-23 | 2013-04-03 | 山东电力集团公司 | Feeder ground positioning method based on dispersion zero sequence voltage detection |
| CN203811747U (en) * | 2014-02-20 | 2014-09-03 | 国投新集能源股份有限公司 | A small current grounding line selection system |
| CN104090208A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | Voltage-type power distribution network fault processing method |
| CN104767182A (en) * | 2015-01-20 | 2015-07-08 | 国家电网公司 | Fault processing method for overhead line type power distribution network |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287295A (en) * | 2018-01-29 | 2018-07-17 | 山东钢铁股份有限公司 | Power circuit earth fault location lookup method and system |
| CN108287295B (en) * | 2018-01-29 | 2024-01-30 | 山东钢铁股份有限公司 | Power line ground fault position finding method and system |
| CN113295965A (en) * | 2021-05-25 | 2021-08-24 | 国网山东省电力公司济南市济阳区供电公司 | Distribution network ground fault positioning method, system and terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104518564A (en) | Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method | |
| CN103812041B (en) | Method for overhauling ring main unit of 10kV cable circuit without switching power supply off | |
| CN101741137B (en) | Network centralized emergency power supply automatic switching method | |
| KR102034675B1 (en) | An apparatus and method for circuit breaker restoring by power failure detection remotely for battery charging system of electric vehicle | |
| CN103236695B (en) | Power distribution network loop closing current switching method and device, and power distribution terminal | |
| CN105720602B (en) | Parallel network power generation energy storage inverter is grid-connected-off-grid system and its running gear | |
| CN110994693A (en) | Uninterrupted parallel operation grid-connected system and grid-connected method of medium-voltage power supply vehicle | |
| CN104090208A (en) | Voltage-type power distribution network fault processing method | |
| CN103390887A (en) | Method for isolating faults of power distribution system with micro-grid | |
| CN104410165B (en) | A kind of method and system of micro-internetworking | |
| CN110739685B (en) | Uninterrupted power operation method for cable type power distribution network | |
| CN109450080A (en) | A kind of automatic redundancy zero propagation switching system of two dc power supply and method | |
| CN103855810A (en) | Self-healing security and stability system for 110KV substation | |
| CN103532221B (en) | The circuit backup power automatic switching implementation method of a kind of self adaptation 330kV bus arrangement and operational mode | |
| CN103915900B (en) | A kind of track traffic electric power monitors DC load monitoring method | |
| CN103066575B (en) | Quickly search the control method of fault | |
| CN105610137A (en) | Centralized power-distribution-system single phase grounding fault elimination method | |
| CN204156594U (en) | A kind of region backup auto-activating device | |
| CN209170039U (en) | A kind of automatic redundancy zero propagation switching system of two dc power supply | |
| CN211377605U (en) | Uninterrupted parallel operation grid-connected system of medium-voltage power supply vehicle | |
| CN103278733A (en) | Cable ground connection remote monitoring method and remote monitoring system | |
| CN105137294B (en) | A kind of voltage-type distribution system single phase earthing troubleshooting methodology | |
| CN102868230A (en) | Intelligent managing device for condition based maintenance of 10-20kv transformer | |
| CN104065096B (en) | A kind of direct current transportation is utilized to reduce the method for full cut-off risk under one-end substation fault | |
| CN104967148A (en) | Parallel switching and protecting device for transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160525 |
|
| RJ01 | Rejection of invention patent application after publication |