CN103066575B - Quickly search the control method of fault - Google Patents
Quickly search the control method of fault Download PDFInfo
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- CN103066575B CN103066575B CN201210563929.6A CN201210563929A CN103066575B CN 103066575 B CN103066575 B CN 103066575B CN 201210563929 A CN201210563929 A CN 201210563929A CN 103066575 B CN103066575 B CN 103066575B
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- fault
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- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to the control method of a kind of quick lookup fault, quickly search 10kV, the control method of singlephase earth fault in 35kV neutral point not solidly grounded system, first a controller is designed, controller can control the closed and disconnected of multi-circuit breaker, during lookup, the chopper allowing on-the-spot all transmission line circuits is opened, switching signal is sent the most successively to chopper, every time when after a breaker closing, check the voltage transformer installed on bus, check whether that singlephase earth fault occurs, if had, again the circuit just closed is again turned on after recording, close other the circuit of a time a time the most successively, thus all find out by all of out of order circuit.This controller can use PLC to realize, it is also possible to realizes with single-chip microcomputer, it is also possible to realize with microcomputer.And search procedure is very reliable, meets the requirement of quick failure judgement circuit.
Description
Technical field
The present invention relates to a kind of power failure lookup method, the control quickly searched particularly to a kind of singlephase earth fault
Method.
Background technology
One typical feature of intelligent grid is exactly trouble shoot, location and self-repair function.But our state at present
Family power distribution network 10kV and 35kV does not also reach this requirement.During power distribution network generation singlephase earth fault, it is difficult to find fault wire
Road, simply bus shows that a certain phase has had earth fault, and this is accomplished by staff and remove loop line one loop line to scene disconnects
Checking which loop line there occurs ground short circuit, do so efficiency comparison is low, and makes customer outage hours longer.Have now
But it is very poor that a lot of algorithms realize trouble shoot accuracy.
Summary of the invention
The problem that the present invention be directed to detect now concrete ground short circuit trouble point difficulty, it is proposed that one quickly searches event
The control method of barrier, the method can have the highest stability, thus can realize wanting of failure judgement circuit reliable, quick
Ask.
The technical scheme is that the control method of a kind of quick lookup fault, specifically comprise the following steps that
1), according to the phase voltage on this phase bus of adjusting out during maximum distance circuit generation single-phase short circuit in small current system
Value, is set to, first setting method can calculate according to the short circuit current on current transformer and line parameter circuit value；
2), withAs criterion magnitude of voltage, respectively with each phase voltage (bus bar side voltage measuring transformer value) withRelatively
Size, if there being a phase voltage to be less than or equal toMagnitude of voltage, then judge that this phase has circuit generation single-phase short circuit；
3), search fault time, first sent trip signal by controller to the chopper of all circuits, cut off all loops
Outlet；
4), sent instruction by controller, send switching signal to chopper successively, the most only close unification transmission line circuit,
By this road voltage transformer closed, observe this loop and close whether rear busbar voltage is less than, such as less than, then judge
For fault, record this loop and disconnect this loop line road；
5), step 4) operation is continued, until the chopper of all circuits all closed a floodgate, it is judged that cross the independent female of each loop
After line voltage, end operation, controller output faulty line information.
Described controller can be selected for PLC or single-chip microcomputer or realized by microcomputer.
The beneficial effects of the present invention is: the present invention quickly searches the control method of fault, can be by all of out of order
Circuit is found out one by one, and search procedure is very reliable, meets the requirement of quick failure judgement circuit.
Accompanying drawing explanation
Fig. 1 is the control method middle controller conspectus that the present invention quickly searches fault；
Fig. 2 is the control method lookup flow chart that the present invention quickly searches fault.
Detailed description of the invention
The control method quickly searching fault is a controller of design, and controller can control the Guan Bi of multi-circuit breaker
And disconnection, controller line schematic diagram as shown in Figure 1, first allow the chopper of on-the-spot all transmission line circuits open, the most again
Switching signal is sent successively, every time when, after a breaker closing, checking the voltage transformer installed on bus, look into chopper
See if there is singlephase earth fault to occur, if it has, record, again the circuit just closed is again turned on, the most again
Close other the circuit of a time a time successively, thus all find out by all of out of order circuit.This controller can
To use PLC to realize, it is also possible to realize with single-chip microcomputer, it is also possible to realize with microcomputer.
Flow chart as shown in Figure 2, the control method quickly searching fault specifically comprises the following steps that
1, according to the phase voltage on this phase bus of adjusting out during maximum distance circuit generation single-phase short circuit in small current system
Value (is set to), first setting method can calculate according to the short circuit current on current transformer and line parameter circuit value；
2, using this voltage as criterion, bigger with it with each phase voltage (bus bar side voltage measuring transformer value) respectively
Little, if having a phase voltage less than (or being equal to) this magnitude of voltage, then judge that this phase has circuit generation single-phase short circuit；
3, after circuit runs about two hours, (if the time that electric power code specifies changes later, two here are little
Time with code become), controller send trip signal to the chopper of all circuits, cut off the outlet of all loops；
4, sent instruction by controller, send switching signal to chopper successively, the most only close unification transmission line circuit, logical
Cross this road voltage transformer closed, observe this loop and close whether rear busbar voltage is less than, such as less than, then event it is judged as
Barrier, records this loop and disconnects this loop line road；
5, owing to it may happen that the possibility of an Above Transmission Lines fault, continuing aforesaid operations, until determining all circuits
Working condition.
Claims (2)
1. the control method of a quick lookup fault, it is characterised in that specifically comprise the following steps that
1), according to the phase voltage value on this phase bus of adjusting out during maximum distance circuit generation single-phase short circuit in small current system,
It is set to, first setting method calculates according to the short circuit current on current transformer and line parameter circuit value；
2), withAs criterion magnitude of voltage, respectively with each phase voltage i.e. bus bar side voltage measuring transformer value withRelatively size,
If there being a phase voltage to be less than or equal toMagnitude of voltage, then judge that this phase has circuit generation single-phase short circuit；
3), search fault time, first sent trip signal by controller to the chopper of all circuits, cut off all loops and go out
Line；
4), sent instruction by controller, send switching signal to chopper successively, the most only close unification transmission line circuit, pass through
This road voltage transformer closed, observes this loop and closes whether rear busbar voltage is less than, such as less than, then event it is judged as
Barrier, records this loop and disconnects this loop line road；
5), step 4) operation is continued, until the chopper of all circuits all closed a floodgate, it is judged that cross the independent bus electricity in each loop
After pressure, end operation, controller output faulty line information.
The most quickly search the control method of fault, it is characterised in that described controller selection PLC can
Programmable controller or single-chip microcomputer or realized by microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563929.6A CN103066575B (en) | 2012-12-24 | 2012-12-24 | Quickly search the control method of fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563929.6A CN103066575B (en) | 2012-12-24 | 2012-12-24 | Quickly search the control method of fault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103066575A CN103066575A (en) | 2013-04-24 |
| CN103066575B true CN103066575B (en) | 2016-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210563929.6A Expired - Fee Related CN103066575B (en) | 2012-12-24 | 2012-12-24 | Quickly search the control method of fault |
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| CN (1) | CN103066575B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543384A (en) * | 2013-10-15 | 2014-01-29 | 国家电网公司 | Method for determining bus ground faults |
| CN106410646B (en) * | 2016-11-07 | 2018-02-06 | 河钢股份有限公司邯郸分公司 | A kind of failure for handing over orthogonal high voltage converter quickly judges and processing operating method |
| 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 |
| CN110687373A (en) * | 2019-09-30 | 2020-01-14 | 上海御渡半导体科技有限公司 | Detection structure and method of ATE system |
| CN112462194A (en) * | 2020-11-09 | 2021-03-09 | 国网山东省电力公司东平县供电公司 | Fault finding device and method for distribution line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420420A (en) * | 2011-12-05 | 2012-04-18 | 清华大学 | Single-phase grounding protection method and system |
| CN102611080A (en) * | 2012-03-16 | 2012-07-25 | 国电南瑞科技股份有限公司 | Main station type small current grounding control method |
| CN102788933A (en) * | 2012-09-25 | 2012-11-21 | 河北省电力公司 | Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07122651B2 (en) * | 1988-07-07 | 1995-12-25 | 日新電機株式会社 | Ground fault fault location method for high resistance 3-terminal parallel 2-circuit transmission line |
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2012
- 2012-12-24 CN CN201210563929.6A patent/CN103066575B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420420A (en) * | 2011-12-05 | 2012-04-18 | 清华大学 | Single-phase grounding protection method and system |
| CN102611080A (en) * | 2012-03-16 | 2012-07-25 | 国电南瑞科技股份有限公司 | Main station type small current grounding control method |
| CN102788933A (en) * | 2012-09-25 | 2012-11-21 | 河北省电力公司 | Method for utilizing automatic switch-out controller to search power grid low-current single-phase ground fault |
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| CN103066575A (en) | 2013-04-24 |
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Granted publication date: 20160914 Termination date: 20181224 |