CN102832602B - Method for improving fault judgment reliability of distributed type feeder automation - Google Patents
Method for improving fault judgment reliability of distributed type feeder automation Download PDFInfo
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- CN102832602B CN102832602B CN201210317108.4A CN201210317108A CN102832602B CN 102832602 B CN102832602 B CN 102832602B CN 201210317108 A CN201210317108 A CN 201210317108A CN 102832602 B CN102832602 B CN 102832602B
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Abstract
The invention discloses a method for improving the fault judgment reliability of distributed type feeder automation, wherein switches are divided into different groups according to minimum distribution regions; each switch is provided with two adjacent minimum distribution regions at most; adjacent switches of each minimum distribution region are divided into a first adjacent switch group and a second adjacent switch group of the switches respectively; a switch has an accurate isolation fault when rejecting to be separated, the fault isolation range is decreased, the fault switch needs to transmit switch separation rejection information to two adjacent switch groups, when one switch receives the separation rejection information of the adjacent switches and a fault current flows through the switch, the gate of the switch is separated; and the switch does not act if no fault current flows through the switch. With the adoption of the method, the influence of special situations such as switch closure rejection, switch separation rejection, communication fault and the like in on-site application to the fault judgment and the isolation is solved, and the reliability in fault judgment is improved.
Description
Technical field
The present invention relates to distribution feeder automation field, specifically a kind of method improving distributed feeder automation fault judgment reliability.
Background technology
Feed line automatization system (FA), as the important component part of distribution automation (DAS), has isolated fault region and makes healthy sections quickly resume power supply function.To reduction power failure area, shorten interruption duration, to improve power supply reliability significant.Distributed feed line automatization system is a kind of isolated fault and recover the healthy sections method of powering of cooperatively interacting relying on equipment room.The feeder automation of switch fitting-type and " face protection " type feeder automation can be divided into according to the mode of Fault Isolation.
" face protection " type feeder automation be a kind of rely between automation switch intercoming mutually and through certain Logic judgment isolated fault and recover the healthy sections method of powering.There is Fault Isolation speed fast, the advantage little to system shock.But the various situations such as on-the-spot application breaker in middle is refused to close, switch is refused point, communication failure have considerable influence to the judgement of fault and isolation.At this kind in particular cases, safety, reliable, quick isolated fault have important practical significance.
Summary of the invention
The object of the invention is to solve that on-the-spot application breaker in middle is refused to close, the special circumstances such as switch is refused point, communication failure are on the impact of fault verification and isolation, in conjunction with distributed feeder automation feature, propose a kind of method improving distributed feeder automation fault judgment reliability.
The invention provides a kind of method improving distributed feeder automation fault judgment reliability for achieving the above object, by switch by minimum distribution group areas, each switch has two adjacent minimum distribution regions at the most, the adjacent switch in each minimum distribution region is put into respectively the 1st adjacent switch group and the 2nd adjacent switch group of this switch; When timesharing refused by switch, be correct isolated fault, reduce Fault Isolation scope, breakdown switch need refuse a point information to two adjacent switches set transmit buttons, and what receive adjacent switch when certain switch refuses a point information, and when this switch flows through fault current, switch separating brake; If switch does not experience fault current, switch is failure to actuate.
The logical relation of described switch motion is:
Wherein
a xfor the action logic value of switch x, logical zero is for being failure to actuate, and logical one is action separating brake;
iN xfor the fault current logical value of switch x, I is the load current value flowing through switch, I
cfor the current protection setting value of switch;
rO xadjacent switch for switch x refuses a point infologic value, and wherein logical one is that adjacent switch refuses a point information, and logical zero is that adjacent switch is without refusing a point information;
rO xlogical relation be:
Wherein,
rO xj(
j=1,2 ..., n) be the switch failure infologic value of switch x adjacent switch, logical value 1 refuses a point information for switch, and logical zero is that switch is without refusing a point information.
For avoiding switch to refuse Fault Isolation expanded range in divisional processing process, when after switch single shot reclosing, if again fault current detected, need time delay separating brake, delay time is less than transformer station's outlet switch backup protection setting time, is greater than switch and refuses the divisional processing time; If after delay time arrives, fault current disappears, then switch returns to normal condition; If fault current does not disappear, be then latched in gate-dividing state.
For solving the impact that switch is refused to close Fault Isolation and recovery, if switch is refused to close, open secondary reclosing function after breakdown switch time delay certain hour; If again close a floodgate failure, be then latched in gate-dividing state; If close a floodgate successfully, supplement rule process by single shot reclosing.
For adjacent switch communication failure, if Switch Communication fault, then adjacent breakdown switch hypothesis flows through normal duty electric current, suppose to judge fault section with this, if fault occurs in switch affiliated area, and switch flows through fault current, then switch time delay separating brake, if delay time internal fault electric current is eliminated, then switch returns normal condition; If switch two adjacent fault group result of determination one is time delay separating brake, one be separating brake, then switch need separating brake immediately immediately; If Switch Communication fault and both sides decompression, then switch separating brake.
The advantage of this algorithm is: (1) gives a kind of switch and refuses feeder automation fault verification treatment principle in point situation, and gives corresponding logical operation and judge formula.The method can fast isolated fault and unlikely isolation range expands.(2) fault time delay separating brake function is again detected after insertion switch single shot reclosing.(3) give a kind of switch refuse conjunction situation under troubleshooting principle.The method insertion switch secondary reclosing function, can effectively avoid chance failure on the impact of Fault Isolation.(4) give the troubleshooting principle under a kind of adjacent switch communication failure condition, the method can effectively avoid the fault coverage under Switch Communication failure condition misjudge and fail to judge.
Embodiment
Method proposed by the invention is utilized to take the detailed process of distributed feeder automation fault judgment reliability measure as follows:
(1) switch is pressed minimum distribution group areas, each switch has two adjacent minimum distribution regions at the most, the adjacent switch in each minimum distribution region is put into respectively the 1st adjacent switch group and the 2nd adjacent switch group of this switch.
(2) when timesharing refused by switch, for correct isolated fault, reduce Fault Isolation scope, its treatment principle is: when timesharing refused by switch, breakdown switch need refuse a point information to two adjacent switches set transmit buttons, what receive adjacent switch when certain switch refuses a point information, and when this switch flows through fault current, switch separating brake.If switch does not experience fault current, switch is failure to actuate.It describes formula:
Wherein
a xfor the action logic value of switch x, logical zero is for being failure to actuate, and logical one is action separating brake.
iN xfor the fault current logical value of switch x, I is the load current value flowing through switch, I
cfor the current protection setting value of switch, 1.08 times that generally get switch rating.
rO xadjacent switch for switch x refuses a point infologic value, and wherein logical one is that adjacent switch refuses a point information, and logical zero is that adjacent switch is without refusing a point information.Be described as:
Wherein,
rO xj(
j=1,2 ..., n) be the switch failure infologic value of switch x adjacent switch, logical value 1 refuses a point information for switch, and logical zero is that switch is without refusing a point information.
(3) for avoiding switch to refuse Fault Isolation expanded range in divisional processing process; switch single shot reclosing supplements regular as follows: when after switch single shot reclosing; if again fault current detected; need time delay separating brake; delay time is less than transformer station's outlet switch backup protection setting time (250ms); be greater than switch and refuse the divisional processing time (150ms), generally get 180ms.If after delay time arrives, fault current disappears, then switch returns to normal condition.If fault current does not disappear, be then latched in gate-dividing state.
(4) the switch treatment principle of refusing to close is as follows: if switch is refused to close, after breakdown switch time delay certain hour, (1s) open secondary reclosing function, if again close a floodgate failure, is then latched in gate-dividing state.If close a floodgate successfully, supplement rule process by single shot reclosing.
(5) during adjacent switch communication failure, treatment principle is as follows:
If A. Switch Communication fault, then adjacent breakdown switch hypothesis flows through normal duty electric current, supposes to judge fault section with this, if fault occurs in switch affiliated area, and switch flows through fault current, then switch time delay separating brake, if delay time internal fault electric current is eliminated, then switch returns normal condition;
If B. switch two adjacent fault group result of determination one is time delay separating brake, one be separating brake, then switch need separating brake immediately immediately;
If C. Switch Communication fault and both sides decompression, then switch separating brake.
The present invention, in conjunction with the feature of distributed feeder automation, gives a kind of switch and refuses feeder automation fault verification treatment principle in point situation, and gives corresponding logical operation and judge formula.Switch single shot reclosing time delay separating brake mechanism is increased for preventing Fault Isolation expanded range.Give a kind of switch refuse conjunction situation under troubleshooting principle.For avoiding Fault Isolation expanded range under adjacent switch communication failure condition, give the processing method of the fault verification under a kind of communication failure condition.
Claims (2)
1. one kind is improved the method for distributed feeder automation fault judgment reliability, its feature exists: by switch by minimum distribution group areas, each switch has two adjacent minimum distribution regions at the most, the adjacent switch in each minimum distribution region is put into respectively the 1st adjacent switch group and the 2nd adjacent switch group of this switch; When timesharing refused by switch, be correct isolated fault, reduce Fault Isolation scope, breakdown switch need refuse a point information to two adjacent switches set transmit buttons, and what receive adjacent switch when certain switch refuses a point information, and when this switch flows through fault current, switch separating brake; If switch does not experience fault current, switch is failure to actuate;
The logical relation of described switch motion is:
A
x＝{IN
x&&RO
x}；
Wherein A
xfor the action logic value of switch x, logical zero is for being failure to actuate, and logical one is action separating brake; IN
xfor the fault current logical value of switch x, I is the load current value flowing through switch, I
cfor the current protection setting value of switch; RO
xadjacent switch for switch x refuses a point infologic value, and wherein logical one is that adjacent switch refuses a point information, and logical zero is that adjacent switch is without refusing a point information; RO
xlogical relation be:
RO
x＝{RO
x1||RO
x2||...||RO
xn}；
Wherein, RO
xj(j=1,2 ..., n) be the switch failure infologic value of switch x adjacent switch, logical value 1 refuses a point information for switch, and logical zero is that switch is without refusing a point information.
2. the method for the distributed feeder automation fault judgment reliability of raising according to claim 1, its feature exists: refuse Fault Isolation expanded range in divisional processing process for avoiding switch, when after switch single shot reclosing, if again fault current detected, need time delay separating brake, delay time is less than transformer station's outlet switch backup protection setting time, is greater than switch and refuses the divisional processing time; If after delay time arrives, fault current disappears, then switch returns to normal condition; If fault current does not disappear, be then latched in gate-dividing state.
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| CN201210317108.4A CN102832602B (en) | 2012-08-31 | 2012-08-31 | Method for improving fault judgment reliability of distributed type feeder automation |
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| CN105301442B (en) * | 2015-10-14 | 2019-01-04 | 福建奥通迈胜电力科技有限公司 | Fault detector singlephase earth fault based on worst principle determines practical method |
| CN105301443B (en) * | 2015-10-14 | 2019-01-11 | 福建奥通迈胜电力科技有限公司 | Fault detector short trouble based on worst principle determines practical method |
| CN105514994B (en) * | 2015-12-23 | 2018-11-27 | 国网福建省电力有限公司 | A kind of distribution network data identification based on topological tree and modified method |
| CN106100117A (en) * | 2016-06-15 | 2016-11-09 | 国家电网公司 | Distributed feeder-terminal-unit collocation method based on minimum distribution region |
| CN106253252A (en) * | 2016-08-27 | 2016-12-21 | 国网山东省电力公司蓬莱市供电公司 | A kind of feeder automation fault self-recovery method of high fault tolerance |
| CN106646124B (en) * | 2016-12-09 | 2019-03-26 | 国网江苏省电力公司淮安供电公司 | A kind of feeder fault self-adapting diagnostic method of Thief zone distributed generation resource |
| CN110033638B (en) * | 2019-03-07 | 2022-01-28 | 西安艾润物联网技术服务有限责任公司 | Method and device for warning vehicle entering and exiting place |
| CN113872162B (en) * | 2021-09-26 | 2024-06-14 | 武汉市速隔迅联电力科技有限公司 | Intelligent distributed and self-adaptive field action type smooth conversion method |
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