CN105137294B - A kind of voltage-type distribution system single phase earthing troubleshooting methodology - Google Patents
A kind of voltage-type distribution system single phase earthing troubleshooting methodology Download PDFInfo
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- CN105137294B CN105137294B CN201510619750.1A CN201510619750A CN105137294B CN 105137294 B CN105137294 B CN 105137294B CN 201510619750 A CN201510619750 A CN 201510619750A CN 105137294 B CN105137294 B CN 105137294B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of technical solutions of voltage-type distribution system single phase earthing troubleshooting methodology, the method of the program determines earth fault line first, then carry out further verifying whether it is this line fault, then since the outlet switch of substation's leading-out terminal, detection earth fault is in that segmentation, and in detection process, block switch is since the block switch close to outlet switch, it carries out successively, it is final to realize that one-phase earthing failure in electric distribution network excludes power supply.
Description
Technical field
The present invention relates to a kind of voltage-type distribution system single phase earthing troubleshooting methodologies, can solve current distribution
The problem that the positioning of net singlephase earth fault is difficult, power off time is grown, improves one-phase earthing failure in electric distribution network treatment effeciency, mitigates regulation and control
The working strength of personnel, track walker improve Reliability of Power Supplying Net Work.
Background technology
In the prior art, well known technology is that 10kV power distribution networks are mostly neutral point non-direct grounding system, single-phase earthing
Fault current is small when failure, it is difficult to quickly confirm fault point.When earth fault processing, existing line selection device for low current accuracy rate
It is higher, but electrical power distribution automatization system does not have singlephase earth fault and automatically processes function, and scene is still using examination drawing, artificial line walking etc.
Method restores non-faulting block supply to determine abort situation by regulation and control staffing, causes earth fault region to have a power failure and grows,
Huge economic loss is brought to user.This is existing deficiencies in the technology.
Invention content
The purpose of the present invention is aiming at deficiency of the prior art, and it is single-phase to provide a kind of voltage-type distribution system
The technical solution of earth fault method for removing, it is automatic that the method for the program according to the automatic division of switch is grounded fault section
Judgement, non-faulting region are supplied from turn, final to realize that one-phase earthing failure in electric distribution network excludes power supply.
This programme is achieved by the following technical measures：A kind of voltage-type distribution system single phase earthing troubleshooting side
Method, including the outlet switch being arranged in supply line and multiple block switches, it is characterised in that including following method：
1）Judge the circuit where earth fault；
2）Outlet switch is closed, if sending out earth fault alarm, earth fault is in outlet switch and first
Between block switch, 3 are otherwise entered step）；
3）Block switch is closed successively, if after a certain block switch is closed, sending out earth fault alarm, then earth fault
Positioned at the load side of the block switch, the block switch at earth fault both ends is disconnected and is latched；
4）Whether failure judgement earth point is the least significant end section of circuit, if it is, keeping the block switch to disconnect, no
The power supply of this section is given, if it is not, then forward from the latter end afterbody block switch of this circuit, faulty section is closed in remote control successively
Between back segment block switch, the non-faulting section behind this line fault area is restored electricity by another circuit.
The step 1）The middle circuit judged using line selection device for low current where earth fault.
The step 1）In, when judging earth fault, also verification step, the outlet for disconnecting this circuit first is opened
It closes, and countdown, if earth fault alarm signal disappears in time T1, confirms earth fault on the circuit, if
Earth fault alarm signal does not disappear in time T1, then it represents that circuit misjudgment.
It is T2 that outlet switch, which is closed, to the time interval of first block switch is closed, and is closed between adjacent sectional switch
Time interval is also T2.
The step 2）After middle closing outlet switch, if sending out earth fault alarm, earth fault in time T3
Between outlet switch and first block switch, T3 ﹤ T2.
The T3 is the 5/7 of T2.
The T1 is identical as T2, and 5s≤T2≤8s.
The step 4）In pass through interconnection switch realize two circuits between connection power supply.
The advantageous effect of this programme can according to the description of the above program, due to determining ground connection first in this scenario
Then faulty line carries out further verifying whether it is this line fault, then from the outlet switch of substation's leading-out terminal
Start, detection earth fault is in that segmentation, and in detection process, block switch is opened from the segmentation close to outlet switch
Pass starts, and carries out successively.It can be seen that compared with prior art, the present invention with substantive distinguishing features outstanding and significantly into
Step, beneficial effects of its implementation are also obvious.
Description of the drawings
Fig. 1 is the structural schematic diagram of the specific embodiment of the invention.
Specific implementation mode
In order to clarify the technical characteristics of the invention, below by a specific implementation mode, and its attached drawing is combined, it is right
This programme is illustrated.
By attached drawing as can be seen that being selected according to substation bus bar grounding alarm signal and line selection device for low current in this programme
Knot fruit starts the preset program of earth fault self-healing, and sends out alarm, starts earth fault self-healing program.
1）According to line selection device for low current as a result, the outlet switch of selected circuit is pulled open in electrical power distribution automatization system automatic remote control
CB1, and start earth fault T1 time limit countdowns, T1 can be that 5s, 7s, 8s or staff regulate and control as required,
If being grounded alarm signal within the T1 time limits to disappear, confirm that fault point is located on the circuit, and be further processed automatically.If
Ground signalling does not disappear after T1 time limit countdowns, then is not this line-to-ground fault, by regulating and controlling personnel's processing.
2）Outlet switch CB1 is closed, if sending out earth fault alarm, earth fault is in outlet switch and first
Between a block switch S1,3 are otherwise entered step）；It closes between the time of outlet switch CB1 to first block switch S1 of closing
It is divided into T2.If sending out earth fault alarm in time T3, earth fault is in outlet switch CB1 and first block switch S1
Between, T3 ﹤ T2.The T3 is the 5/7 of T2.T2 can be that 5s, 7s, 8s or staff regulate and control as required.
3）Block switch is closed successively, if after a certain block switch S1 is closed, sending out earth fault alarm, then earth fault
The block switch at earth fault both ends is disconnected and is latched positioned at the load side of the block switch by point；Adjacent sectional is closed to open
Time interval between pass is also T2, if sending out earth fault alarm in time T3, earth fault is in the negative of block switch
Lotus side, T3 ﹤ T2.The T3 is the 5/7 of T2.T2 can be that 5s, 7s, 8s or staff regulate and control as required
4）Whether failure judgement earth point is the least significant end section of circuit, if it is, block switch S3 is kept to disconnect,
This section is not given to power, if it is not, then forward from the latter end afterbody block switch of this circuit, failure is closed in remote control successively
The block switch of section back segment restores electricity in the non-faulting section behind this line fault area by another circuit.The step
4）In pass through interconnection switch L1 and realize connection power supply between circuit 1 and circuit 2.
The present invention is not limited in above-mentioned specific implementation mode, essential scope of the those of ordinary skill in the art in the present invention
The variations, modifications, additions or substitutions inside made should also belong to the scope of protection of the present invention.
Claims (4)
1. a kind of voltage-type distribution system single phase earthing troubleshooting methodology, including the outlet switch that is arranged in supply line and
Multiple block switches, it is characterised in that including following method：
1）Judge the circuit where earth fault；When judging earth fault, also verification step disconnects this circuit first
Outlet switch, and countdown confirm earth fault in the circuit if earth fault alarm signal disappears in time T1
On, if earth fault alarm signal does not disappear in time T1, then it represents that circuit misjudgment；
2）Outlet switch is closed, if sending out earth fault alarm, earth fault is segmented in outlet switch and first
Between switch, 3 are otherwise entered step）；It is T2 that outlet switch, which is closed, to the time interval of first block switch is closed, and closes phase
Time interval between adjacent block switch is also T2；After closing outlet switch, if sending out earth fault alarm in time T3, connect
Earth fault point is between outlet switch and first block switch, T3 ﹤ T2；T3 is the 5/7 of T2；
3）Block switch is closed successively, if after a certain block switch is closed, sending out earth fault alarm, then earth fault is located at
The block switch at earth fault both ends is disconnected and is latched by the load side of the block switch；
4）Whether failure judgement earth point is the least significant end section of circuit, if it is, the block switch is kept to disconnect, does not give this
Section powers, if it is not, then forward from the latter end afterbody block switch of this circuit, after fault section is closed in remote control successively
The block switch of section, the non-faulting section behind this line fault area is restored electricity by another circuit.
2. voltage-type distribution system single phase earthing troubleshooting methodology according to claim 1, it is characterized in that：The step
Rapid 1）The middle circuit judged using line selection device for low current where earth fault.
3. voltage-type distribution system single phase earthing troubleshooting methodology according to claim 1, it is characterized in that：The T1
It is identical as T2, and 5s≤T2≤8s.
4. voltage-type distribution system single phase earthing troubleshooting methodology according to claim 1, it is characterized in that：The step
Rapid 4）In pass through interconnection switch realize two circuits between connection power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510619750.1A CN105137294B (en) | 2015-09-25 | 2015-09-25 | A kind of voltage-type distribution system single phase earthing troubleshooting methodology |
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| CN201510619750.1A CN105137294B (en) | 2015-09-25 | 2015-09-25 | A kind of voltage-type distribution system single phase earthing troubleshooting methodology |
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| CN105137294A CN105137294A (en) | 2015-12-09 |
| CN105137294B true CN105137294B (en) | 2018-08-31 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074938A (en) * | 2010-11-05 | 2011-05-25 | 珠海许继电气有限公司 | Single-phase earth fault isolation system and method for electrical distribution network |
| 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 |
| CN103760465A (en) * | 2014-01-24 | 2014-04-30 | 泉州维盾电气有限公司 | Single-phase earth fault direction judgment and processing method of small current grounding system |
| CN104090208A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | Voltage-type power distribution network fault processing method |
| CN104124672A (en) * | 2014-07-28 | 2014-10-29 | 国家电网公司 | Power restoration method for voltage type fault section front end |
| CN204068225U (en) * | 2013-12-31 | 2014-12-31 | 宏秀电气有限公司 | Intelligent distribution network self-healing control system |
-
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- 2015-09-25 CN CN201510619750.1A patent/CN105137294B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074938A (en) * | 2010-11-05 | 2011-05-25 | 珠海许继电气有限公司 | Single-phase earth fault isolation system and method for electrical distribution network |
| 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 |
| CN204068225U (en) * | 2013-12-31 | 2014-12-31 | 宏秀电气有限公司 | Intelligent distribution network self-healing control system |
| CN103760465A (en) * | 2014-01-24 | 2014-04-30 | 泉州维盾电气有限公司 | Single-phase earth fault direction judgment and processing method of small current grounding system |
| CN104090208A (en) * | 2014-06-30 | 2014-10-08 | 国家电网公司 | Voltage-type power distribution network fault processing method |
| CN104124672A (en) * | 2014-07-28 | 2014-10-29 | 国家电网公司 | Power restoration method for voltage type fault section front end |
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