CN104852468A - Distribution network line ground fault line selection and assorted device using controllable simulated load - Google Patents
Distribution network line ground fault line selection and assorted device using controllable simulated load Download PDFInfo
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- CN104852468A CN104852468A CN201510190002.6A CN201510190002A CN104852468A CN 104852468 A CN104852468 A CN 104852468A CN 201510190002 A CN201510190002 A CN 201510190002A CN 104852468 A CN104852468 A CN 104852468A
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Abstract
The present invention discloses a distribution network ground fault line selection and assorted device using a controllable simulated load. A controllable simulated ground load module, three rapid on-off breakers and a control module are disposed between a three-phase output circuit of a distribution network line and grounding points, wherein one ends of the three rapid on-off breakers are correspondingly connected with the three-phase output circuit while the other ends of the rapid on-off breaker are connected with the controllable simulated ground load module, control ends of the three on-off breakers and a control end of the controllable simulated ground load module are all connected with the control module, the controllable simulated ground load module is used for simulating a ground load so as to form a reliable current loop with a ground fault point, thereby forming overload current, a ground fault circuit can be determined according to occurrence of the overload current judged according to the load current, a simulated fault signal is simultaneously sent to the control module, and the control module is used for controlling opening and closing of the three rapid on-off breakers according to the simulated fault signal.
Description
Technical field
The present invention relates to a kind of controllable simulation load that adopts and carry out distribution line earthing wire-selecting and corollary apparatus.
Background technology
Along with socioeconomic high speed development, the expansion year by year of urban power distribution network, distribution scale is increasing, requires more and more higher to power supply reliability.Especially company of province proposes " first-class power distribution network " construction requirements, when current power distribution network line-to-ground fault more and more frequently occurs, the regulation originally allowing single phase ground fault to run in 2 hours cannot meet the requirement of current power supply high reliability, simultaneously current Small Electric Current Earthing And Routing Device route selection success rate is not high, accuracy almost only has 30%, need repeatedly drawing regular link just can find faulty line, affect powerup issue huge.The mode that traditional is by judging zero sequence capacitance current carries out earth fault line selection principle, and this mode accuracy is poor, and antijamming capability is more weak.
Summary of the invention
The invention provides a kind of controllable simulation load that adopts and carry out distribution line earthing wire-selecting and corollary apparatus, it mainly utilizes single-phase earthing point on the controllable simulation ground connection load and circuit that drop in short-term to form a certain size overload electric current, by judging to occur that the outlet of overload electric current just can determine that earth fault occurs in that outlet.
Present invention employs following technical scheme: a kind of controllable simulation load that adopts carries out distribution line earthing wire-selecting and corollary apparatus, the three-phase outlet line of described distribution network line is connected with the 10kV circuit on some roads, controllable simulation ground connection loading module is provided with between the three-phase outlet line and earth point of distribution network line, three quick deciliter circuit breakers and control module, one end of three quick deciliter circuit breakers is corresponding to be respectively connected with three-phase outlet line, the other end of three quick deciliter circuit breakers is connected with controllable simulation ground connection loading module, the control end of three quick deciliter circuit breakers is all connected with control module with the control end of controllable simulation ground connection loading module, controllable simulation ground connection loading module is used for analogue ground load and earth fault forms reliable current circuit, thus form overload electric current, judge to occur that the circuit that earth fault occurs just is determined in the appearance of overload electric current according to load current, simultaneously and simulated failure signal is sent to control module, control module is used for according to the separating brake of simulated failure signal controlling three quick deciliter circuit breakers and combined floodgate.
Described controllable simulation ground connection loading module comprises some electric power resistance and some reactance components, and some electric power resistance forms resistance combination after mutually connecting, and some reactance components form reactance combination after mutually connecting, and resistance combination and reactance are combined parallel with one another.
The time of once combined floodgate and a separating brake of three described quick deciliter circuit breakers is 200ms-10s.The control end of quick deciliter described circuit breaker is provided with Long-distance Control port, and remote control request port is corresponding with the control port of monitoring system of electric substation at a distance to be connected.Described controllable simulation ground connection loading module manual assumed load in advance, or by electronic power switch dynamic adjustments payload.
The present invention has following beneficial effect: after have employed above technical scheme, the present invention utilizes single-phase earthing point on the controllable simulation ground connection load and circuit that drop in short-term to form a certain size overload electric current, by judging to occur that the outlet of overload electric current just can determine that earth fault occurs in that outlet.Controllable simulation ground connection loading module of the present invention manual assumed load in advance, or by electronic power switch dynamic adjustments payload, the balance to short-circuit current level on place transformer station 35kV, 10kV bus average short circuit level and circuit can be passed through like this, to ensure that overload electric current can be reliable and stable in certain numerical value.The present invention directly by forming reliable current circuit by analogue ground load and earth fault, overload current stabilization, and size be easy to differentiate, accuracy is high compared with conventional method, by force anti-interference.Quick deciliter circuit breaker of the present invention once can close a floodgate and a separating brake in 200ms to 10s, ensure that and there will not be long-time overload electric current.This circuit breaker is equipped with the interface of access monitoring system of electric substation, and possesses remote operation function, and a distant place, conveniently regulating and controlling center operates, and judges earth fault line fast.The present invention is easy to carry and execute-in-place more in addition.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Embodiment
Embodiment one, in FIG, the invention provides a kind of controllable simulation load that adopts and carry out distribution line earthing wire-selecting and corollary apparatus, the three-phase outlet line of described distribution network line is connected with the 10kV circuit on some roads, the three-phase outlet line of the distribution network line of the present embodiment is connected with the 10kV circuit on 12 tunnels, controllable simulation ground connection loading module is provided with between the three-phase outlet line and earth point of distribution network line, three quick deciliter circuit breakers and control module, one end of three quick deciliter circuit breakers is corresponding to be respectively connected with three-phase outlet line, the other end of three quick deciliter circuit breakers is connected with controllable simulation ground connection loading module, the control end of three quick deciliter circuit breakers is all connected with control module with the control end of controllable simulation ground connection loading module, controllable simulation ground connection loading module is used for analogue ground load and earth fault forms reliable current circuit, thus form overload electric current, judge to occur that the circuit that earth fault occurs just is determined in the appearance of overload electric current according to load current, simultaneously and simulated failure signal is sent to control module, control module is used for according to the separating brake of simulated failure signal controlling three quick deciliter circuit breakers and combined floodgate, described controllable simulation ground connection loading module comprises some electric power resistance and some reactance components, the controllable simulation ground connection loading module of the present embodiment comprises six electric power resistance and six reactance components, six electric power resistance form resistance combination after mutually connecting, six reactance components form reactance combination after mutually connecting, resistance combination and reactance are combined parallel with one another, the time of once combined floodgate and a separating brake of three described quick deciliter circuit breakers is 200ms-10s, the time of once combined floodgate and a separating brake of three quick deciliter circuit breakers of the present embodiment is 1s, the control end of quick deciliter described circuit breaker is provided with Long-distance Control port, remote control request port is corresponding with the control port of monitoring system of electric substation at a distance to be connected, described controllable simulation ground connection loading module manual assumed load in advance, or by electronic power switch dynamic adjustments payload.
Embodiment two, in FIG, the invention provides a kind of controllable simulation load that adopts and carry out distribution line earthing wire-selecting and corollary apparatus, the three-phase outlet line of described distribution network line is connected with the 10kV circuit on some roads, the three-phase outlet line of the distribution network line of the present embodiment is connected with the 10kV circuit on 12 tunnels, controllable simulation ground connection loading module is provided with between the three-phase outlet line and earth point of distribution network line, three quick deciliter circuit breakers and control module, one end of three quick deciliter circuit breakers is corresponding to be respectively connected with three-phase outlet line, the other end of three quick deciliter circuit breakers is connected with controllable simulation ground connection loading module, the control end of three quick deciliter circuit breakers is all connected with control module with the control end of controllable simulation ground connection loading module, controllable simulation ground connection loading module is used for analogue ground load and earth fault forms reliable current circuit, thus form overload electric current, judge to occur that the circuit that earth fault occurs just is determined in the appearance of overload electric current according to load current, simultaneously and simulated failure signal is sent to control module, control module is used for according to the separating brake of simulated failure signal controlling three quick deciliter circuit breakers and combined floodgate, described controllable simulation ground connection loading module comprises some electric power resistance and some reactance components, the controllable simulation ground connection loading module of the present embodiment comprises seven electric power resistance and seven reactance components, seven electric power resistance form resistance combination after mutually connecting, seven reactance components form reactance combination after mutually connecting, resistance combination and reactance are combined parallel with one another, the time of once combined floodgate and a separating brake of three described quick deciliter circuit breakers is 200ms-10s, the time of once combined floodgate and a separating brake of three quick deciliter circuit breakers of the present embodiment is 3s, the control end of quick deciliter described circuit breaker is provided with Long-distance Control port, remote control request port is corresponding with the control port of monitoring system of electric substation at a distance to be connected, described controllable simulation ground connection loading module manual assumed load in advance, or by electronic power switch dynamic adjustments payload.
Claims (5)
1. one kind adopts controllable simulation load to carry out distribution line earthing wire-selecting and corollary apparatus, the three-phase outlet line that it is characterized in that described distribution network line is connected with the 10kV circuit on some roads, controllable simulation ground connection loading module is provided with between the three-phase outlet line and earth point of distribution network line, three quick deciliter circuit breakers and control module, one end of three quick deciliter circuit breakers is corresponding to be respectively connected with three-phase outlet line, the other end of three quick deciliter circuit breakers is connected with controllable simulation ground connection loading module, the control end of three quick deciliter circuit breakers is all connected with control module with the control end of controllable simulation ground connection loading module, controllable simulation ground connection loading module is used for analogue ground load and earth fault forms reliable current circuit, thus form overload electric current, judge to occur that the circuit that earth fault occurs just is determined in the appearance of overload electric current according to load current, simultaneously and simulated failure signal is sent to control module, control module is used for according to the separating brake of simulated failure signal controlling three quick deciliter circuit breakers and combined floodgate.
2. employing controllable simulation load according to claim 1 carries out distribution line earthing wire-selecting and corollary apparatus, it is characterized in that described controllable simulation ground connection loading module comprises some electric power resistance and some reactance components, some electric power resistance forms resistance combination after mutually connecting, some reactance components form reactance combination after mutually connecting, resistance combination and reactance are combined parallel with one another.
3. employing controllable simulation load according to claim 1 carries out distribution line earthing wire-selecting and corollary apparatus, it is characterized in that the time of once combined floodgate and a separating brake of three described quick deciliter circuit breakers is 200ms-10s.
4. employing controllable simulation load according to claim 1 carries out distribution line earthing wire-selecting and corollary apparatus, it is characterized in that the control end of quick deciliter described circuit breaker is provided with Long-distance Control port, remote control request port is corresponding with the control port of monitoring system of electric substation at a distance to be connected.
5. employing controllable simulation load according to claim 1 carries out distribution line earthing wire-selecting and corollary apparatus, it is characterized in that described controllable simulation ground connection loading module manual assumed load in advance, or by electronic power switch dynamic adjustments payload.
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| CN201510190002.6A CN104852468A (en) | 2015-04-21 | 2015-04-21 | Distribution network line ground fault line selection and assorted device using controllable simulated load |
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| CN201510190002.6A CN104852468A (en) | 2015-04-21 | 2015-04-21 | Distribution network line ground fault line selection and assorted device using controllable simulated load |
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| CN101707358A (en) * | 2009-11-10 | 2010-05-12 | 刘亮 | Single-phase grounding comprehensive protecting device of electric network |
| JP2010154631A (en) * | 2008-12-25 | 2010-07-08 | Chugoku Electric Power Co Inc:The | Device for preventing opening of secondary circuit in current transformer for measuring instrument |
| CN102570420A (en) * | 2011-12-29 | 2012-07-11 | 广东中钰科技有限公司 | System for application of resistor to resonant grounding system |
| CN102593808A (en) * | 2012-03-23 | 2012-07-18 | 上海市电力公司 | System for grounding neutral point by using combination of reactor and resistors |
| CN103267928A (en) * | 2013-04-27 | 2013-08-28 | 王鹏 | Low-current system single-phase earth fault line selection control circuit |
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2015
- 2015-04-21 CN CN201510190002.6A patent/CN104852468A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013811A (en) * | 2007-02-01 | 2007-08-08 | 傅桂兴 | Method and apparatus of single-phase fault line selection of duplicate supply looped network |
| JP2010154631A (en) * | 2008-12-25 | 2010-07-08 | Chugoku Electric Power Co Inc:The | Device for preventing opening of secondary circuit in current transformer for measuring instrument |
| CN101540499A (en) * | 2009-03-19 | 2009-09-23 | 江苏省电力公司南京供电公司 | Fast line selection tripping device for medium resistance grounding for urban distribution network and line selection method |
| CN101707358A (en) * | 2009-11-10 | 2010-05-12 | 刘亮 | Single-phase grounding comprehensive protecting device of electric network |
| CN102570420A (en) * | 2011-12-29 | 2012-07-11 | 广东中钰科技有限公司 | System for application of resistor to resonant grounding system |
| CN102593808A (en) * | 2012-03-23 | 2012-07-18 | 上海市电力公司 | System for grounding neutral point by using combination of reactor and resistors |
| CN103267928A (en) * | 2013-04-27 | 2013-08-28 | 王鹏 | Low-current system single-phase earth fault line selection control circuit |
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