CN102142674A - Method for selectively clearing single-phase ground fault of ship shore power system - Google Patents
Method for selectively clearing single-phase ground fault of ship shore power system Download PDFInfo
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- CN102142674A CN102142674A CN2011100281815A CN201110028181A CN102142674A CN 102142674 A CN102142674 A CN 102142674A CN 2011100281815 A CN2011100281815 A CN 2011100281815A CN 201110028181 A CN201110028181 A CN 201110028181A CN 102142674 A CN102142674 A CN 102142674A
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Abstract
The invention discloses a method for selectively clearing a single-phase ground fault of a ship shore power system. A variable reactor is arranged between a system neutral point and the ground. When the system is in a single-phase ground fault, the occurrence of the single-phase ground fault is judged according to the rise of a neutral point voltage to ground after the ship shore power system is in a single-phase ground fault; after the single-phase ground fault occurs, the variable reactor is controlled to act within the range of a time angle phi 0 in one cyclic wave of the changes of the neutral point voltage to ground, thus the variable reactor is controlled to gradually decrease a reactance value, and an instaneous tripping mechanism of a corresponding circuit breaker is triggered by gradually increasing short-circuit current so as to clear the fault, wherein the ranges of the time angle phi 0 are as follows: phi 0 is not smaller than 0 DEG and not larger than 50 DEG, phi 0 is not smaller than 105 DEG and not larger than 230 DEG, and phi 0 is not smaller than 285 DEG and not larger than 360 DEG; and before the circuit is completely disconnected, a fuse connected with a corresponding position of the variable reactor is fused, so that the system is restored to a low-current grounding state and the ablation of a contact of a circuit breaker is avoided.
Description
Technical field
The present invention relates to the method for the selective excision of a kind of electric supply installation single phase ground fault, be mainly used in the ship shore electric system, can when system's generation single phase ground fault, selectively excise fault fast.
Technical background
The boats and ships ac power supply system adopts the three-phase three-wire system IT system usually, the power supply continuity height, but need step-down transformer could obtain single-phase 220V power supply, increased construction and maintenance cost.And the three-phase four-wire system solidly grounded system does not need step-down transformer just can obtain single-phase 220V power supply, good economy performance.Because the single-phase power load amount of port and pier is big, so mostly adopt the three-phase four-wire system solidly grounded system, invest for a short time, but power supply continuity is not high.Connect the bank electricity as directly drawing when boats and ships pull in to shore, ship housing links to each other with ground, and the ship shore electric system is solidly grounded system, no matter be boats and ships generation single phase ground fault (often taking place), still harbour generation single phase ground fault, fault current is very big, causes system's tripping operation that is short-circuited; And the tripping operation poor selectivity might enlarge the power failure scope, and the huge short circuit current contact of breaker of can ablating.The probability that this kind situation takes place when overhauling is bigger, and the ship shore electric system that has relatively high expectations for power supply continuity is unallowed.
At above-mentioned situation, to the experience of electric power system fault detect and failure removal,, designed the single phase ground fault selective ablation scheme that is used for the ship shore electric system according to the characteristics of boats and ships and port and pier electric power system based on for a long time.Requirement and power supply-distribution system earthing mode commonly used according to protection; be chosen between electric power system neutral point and the ground and insert variable reactor; make system become small current neutral grounding system; switch the reactance value of connecting system behind system's generation single phase ground fault by the control variable reactor; circuit breaker is selectively tripped; excise fault fast, the continued reliability of assurance system power supply.
But after system's generation earth fault,, can cause the circuit breaker misoperation or be failure to actuate as not controlling variable reactor action constantly.The present invention is for finding out the best time of control variable reactor action, making corresponding circuit breaker correct operation; Simultaneously for solving the situation of arc erosion action breaker contact in the failure removal process, the present invention inserts fuse in the variable reactor relevant position, before respective circuit breakers disconnects fully on current supply circuit, corresponding fuse blows, the system restoration initial condition is not only excised fault but also avoid contact of breaker to ablate.This programme why can be when system's generation single phase ground fault rapid and reliable excision fault, and avoid the action breaker contact to ablate, the selection at variable reactor action moment angle and very important at variable reactor relevant position access fuse, in this angular region inner control variable reactor action constantly, can reliably excise earth fault and avoid contact of breaker to ablate again.
Summary of the invention
The objective of the invention is, the method of selective ablation behind a kind of ship shore electric single phase ground fault is proposed, by monitoring system monitoring phase line earth fault, carve the action of control variable reactor in due course, in satisfactory moment angular region inner control variable reactor action, fast and reliable excision fault guarantees that electric power system is safe and reliable, to reduce the cost of harbour electric power system to the ship power supply that reaches port.Before circuit breaker disconnected fully, the fuse blows that links to each other with variable reactor avoided contact of breaker to ablate simultaneously.
Technical scheme of the present invention is: ship shore electric system single-phase earth fault selective ablation method, between system neutral and ground, variable reactor is set, when system's generation single phase ground fault, raising according to the neutral point voltage to earth judges whether to take place single phase ground fault.
In moment angular region inner control variable reactor action of the present invention, after single phase ground fault takes place, in the cycle that the neutral point voltage to earth changes, at moment angle
The action of following scope inner control variable reactor,
Promptly control variable reactor, reactance value is reduced gradually, trigger the moving tripping mechanism action of wink of respective circuit breakers by increasing short circuit current gradually, thereby excise fault.
Before circuit breaker disconnects fully, with the fuse blows that the variable reactor relevant position links to each other, make system restoration small current neutral grounding state, avoid contact of breaker to ablate.
Behind system's generation single-phase earthing, if still by neutral-point solid ground, short circuit tripping operation non-selectivity then.Between neutral point and ground, insert variable reactor, monitor the variation of neutral point voltage to earth by monitoring system, send the action of control signal control variable reactor in good time, thereby increase short circuit current, trigger the moving tripping mechanism action of wink of the circuit breaker of earth fault phase, the excision fault, the fuse that is connected with variable reactor simultaneously disconnects preceding fusing fully at circuit breaker, avoids contact of breaker to ablate.
The method of ship shore electric single phase ground fault selective ablation, monitoring technology by means of the advanced person, the neutral point that makes system utilizes circuit breaker wink to move the bigger advantage of tripping mechanism operating current extreme difference by variable reactor ground connection, realizes that circuit breaker selectively trips.Gather fault message based on monitoring system, the short circuit model is theoretical, and system improvement is basic.
Key of the present invention is to find out the best time of control variable reactor action, in this scope inner control variable reactor action constantly, can reliably excise short trouble and avoid contact of breaker to ablate again.
As shown in Figure 1: the short circuit current variation characteristic is as follows after system's generation single-phase short circuit:
In the formula
I is a short circuit current in the formula, r
0And x
0Be line resistance and reactance, x is the variable reactor by the neutral point connecting system during for single phase ground fault,
The moment angle that a cycle inner control variable reactor that changes for the neutral point voltage to earth moves, the frequency of ω indication circuit system, K closes a floodgate and represents to control the variable reactor action after the system earth.
By following formula as can be known: the size of current i (t) mainly by
Decision.
By analysis verification, after single-phase short circuit, in the cycle that the neutral point voltage to earth changes, at moment angle
The action of following scope inner control variable reactor, the transient current of its generation can trigger the moving tripping mechanism action of circuit breaker wink, reliably excises fault:
The method of ship shore electric single phase ground fault selective ablation of the present invention is: the neutral point voltage to earth raises behind system's generation single-phase earthing, be easy to monitoring, circuit breaker wink, moving tripping mechanism instantaneous operation electric current was differential bigger, move at moment angular region inner control variable reactor of the present invention after the short circuit, can realize that after short circuit circuit breaker selectively trips, excise fault fast, simultaneously before circuit breaker disconnects fully, corresponding fuse blows avoids contact of breaker to ablate.
Technical solution of the present invention is: the moment angle of determining the variable reactor action.If system's generation single phase ground fault, the control variable reactor of no time selectivity moves, and described fuse blows then can take place but no disconnection of respective circuit breakers; Or described circuit breaker disconnects and corresponding fuse does not have the situation of fusing, do not reach the purpose of selective ablation fault.So key of the present invention is to determine the moment of suitable control variable reactor action, scope inner control variable reactor action between making at this moment, circuit breaker reliably disconnects, and corresponding fuse in time fuses, both guarantee system's power supply reliability, and avoided contact of breaker to ablate again.
The invention has the beneficial effects as follows: in moment angular region inner control variable reactor action of the present invention, can reliably excise fault, mainly contain following characteristics:
Failure removal mechanism of the present invention changes based on short circuit current, different variable reactor action, the short circuit current differences constantly controlled after short circuit.In described moment angular region inner control variable reactor action, can reliably excise earth fault.By monitoring system monitoring phase line earth fault, carve the action of control variable reactor in due course,, excise fault fast in satisfactory moment angular region inner control variable reactor action, the assurance electric power system is safe and reliable, reduces the cost of harbour electric power system to the ship power supply that reaches port.Before circuit breaker disconnected fully, the fuse blows that links to each other with variable reactor avoided contact of breaker to ablate simultaneously.
The present invention can make the moving tripping mechanism action of circuit breaker wink selective, the excision system single-phase earth fault.
The present invention gathers fault message by monitoring system, and the action of control variable reactor in satisfactory moment angular region inner control variable reactor action, is excised fault fast.The inventive method is simple, and is motivated, is active in one's movements effective removal system single phase ground fault, economical and energy saving.
Description of drawings
Fig. 1 single phase ground fault system isoboles
Fig. 2 is a ship shore electric system single-phase earth fault illustraton of model of the present invention
Fig. 3 is the present invention's angle schematic diagram of the satisfactory moment (dash area)
Specific embodiments
Ship shore electric single phase ground fault selective ablation scheme, raise according to neutral point voltage to earth behind the electric power system generation single-phase earthing and to judge whether to take place single phase ground fault, and the neutral point voltage to earth is easy to monitoring, can judge accurately whether system single phase ground fault takes place.
Between system neutral and ground, variable reactor is set, when system's generation single phase ground fault, in moment angular region inner control variable reactor action of the present invention, by increasing the moving tripping mechanism of wink that short circuit current touches respective circuit breakers, thereby the excision fault, simultaneously before circuit breaker disconnects fully, the fuse blows that links to each other with the variable reactor relevant position, make the system restoration small current neutral grounding system, avoid contact of breaker to ablate.
System's generation single-phase earthing is pressed neutral-point solid ground, then short circuit tripping operation non-selectivity or overstep tripping if still be.Between neutral point and ground, insert variable reactor, monitor the variation of neutral point voltage to earth by monitoring system, send the action of control signal control variable reactor in good time, thereby increase short circuit current, trigger moving tripping mechanism of circuit breaker wink, the excision fault, the fuse that is connected with variable reactor simultaneously disconnects preceding fusing fully at circuit breaker, avoids contact of breaker to ablate.
The key of this scheme is to determine suitable moment angle, in this angular region inner control variable reactor action constantly, can excise earth fault and avoid contact of breaker to ablate again.
Behind system single-phase earth fault, short circuit current changes, by following formula as can be known:
By following formula as can be known, the size of current i (t) mainly by
Decision.
The concrete examples of applications of system is: in the system as shown in Figure 2, behind the generation single phase ground fault, monitors the neutral point voltage to earth and changes, and in the cycle that its voltage to earth changes,
Or
Or
The time (as shown in Figure 3) control variable reactor action, can excise earth fault fast and avoid contact of breaker to ablate again.
According to Fig. 3 as can be known: in the cycle that the neutral point voltage to earth changes; in the action of the bigger moment angle of voltage waveform slope (dash area among the figure) control variable reactor; corresponding circuit breaker is reliably tripped; again can be before circuit breaker disconnects fully; make corresponding fuse blows; avoid contact of breaker to ablate, and good more at the big more moment angle control variable reactor action effect of slope, meet the requirement of protection system power supply reliability.
At above-mentioned moment angular region inner control variable reactor k
1-k
10Action increases short circuit current, and circuit breaker instantaneous trip mechanism correct operation is at circuit breaker K
1-K
3Before disconnecting fully, the fuse (R that is connected with variable reactor
D1-R
D10) fusing, the system restoration initial condition had not only effectively been excised fault and has been guaranteed the power supply reliability of system but also avoided contact of breaker to ablate.
Claims (2)
1. ship shore electric system single-phase earth fault selective ablation method is characterized in that between system neutral and ground variable reactor being set.When system's generation single phase ground fault, behind ship shore electric system generation single phase ground fault, the neutral point voltage to earth raises and judges whether to take place single phase ground fault,
After single phase ground fault takes place, in the cycle that the neutral point voltage to earth changes, at moment angle
The action of following scope inner control variable reactor,
Promptly control variable reactor, reactance value is reduced gradually, by increasing the moving tripping mechanism of wink that short circuit current triggers respective circuit breakers gradually, thus the excision fault.
2. ship shore electric system single-phase earth fault selective ablation method according to claim 1, it is characterized in that before circuit breaker disconnects fully, with the fuse blows that the variable reactor relevant position links to each other, make system restoration small current neutral grounding state, avoid contact of breaker to ablate.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508118A (en) * | 2011-12-09 | 2012-06-20 | 江苏镇安电力设备有限公司 | Method for realizing grounding fault line selection of IT (information technology) power system and preparing neutral conductors |
| CN107968386A (en) * | 2017-12-26 | 2018-04-27 | 苏州科爱佳自动化科技有限公司 | A kind of fault source cutting method |
| CN108011369A (en) * | 2017-12-26 | 2018-05-08 | 江苏科技大学 | A kind of shipping shore power system with fault diagnosis and warning function |
| CN108039701A (en) * | 2017-12-26 | 2018-05-15 | 苏州科爱佳自动化科技有限公司 | A kind of circuit failure protection system |
| CN108075452A (en) * | 2017-12-26 | 2018-05-25 | 苏州科爱佳自动化科技有限公司 | A kind of transmission line of electricity Self-Protection Subsystem |
| CN108152649A (en) * | 2017-12-26 | 2018-06-12 | 苏州科爱佳自动化科技有限公司 | A kind of line fault intelligent scanning guard system |
| CN108155631A (en) * | 2017-12-26 | 2018-06-12 | 苏州科爱佳自动化科技有限公司 | A kind of circuit ground failure removal system |
| CN108152678A (en) * | 2017-12-26 | 2018-06-12 | 苏州科爱佳自动化科技有限公司 | A kind of fault automatic checkout system |
| CN108169624A (en) * | 2017-12-26 | 2018-06-15 | 苏州科爱佳自动化科技有限公司 | A kind of fault source localization method |
| CN109921394A (en) * | 2019-04-15 | 2019-06-21 | 江苏太航信息科技有限公司 | A kind of shipboard automation device with failure removal function |
| CN115065026A (en) * | 2022-05-31 | 2022-09-16 | 青岛和瑞德电力科技有限公司 | A high tension cable fast-assembling wiring system for bank electricity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1144167A1 (en) * | 1983-08-19 | 1985-03-07 | Волжское объединение по производству легковых автомобилей | Device for automatic control of inductance of earthing reactor |
| CN1912642A (en) * | 2006-07-28 | 2007-02-14 | 徐文远 | Single-phase ground wire selecting equipment and method of neutral-point uneffect earthed system |
-
2011
- 2011-01-26 CN CN 201110028181 patent/CN102142674B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1144167A1 (en) * | 1983-08-19 | 1985-03-07 | Волжское объединение по производству легковых автомобилей | Device for automatic control of inductance of earthing reactor |
| CN1912642A (en) * | 2006-07-28 | 2007-02-14 | 徐文远 | Single-phase ground wire selecting equipment and method of neutral-point uneffect earthed system |
Non-Patent Citations (1)
| Title |
|---|
| 朱珂等: "《一种基于可控短路的故障选线方案》", 《电力自动化设备》, vol. 28, no. 11, 30 November 2008 (2008-11-30), pages 1 - 2 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508118A (en) * | 2011-12-09 | 2012-06-20 | 江苏镇安电力设备有限公司 | Method for realizing grounding fault line selection of IT (information technology) power system and preparing neutral conductors |
| CN108169624A (en) * | 2017-12-26 | 2018-06-15 | 苏州科爱佳自动化科技有限公司 | A kind of fault source localization method |
| CN108152678B (en) * | 2017-12-26 | 2020-02-14 | 苏州科爱佳自动化科技有限公司 | Circuit fault automatic detection system |
| CN108039701A (en) * | 2017-12-26 | 2018-05-15 | 苏州科爱佳自动化科技有限公司 | A kind of circuit failure protection system |
| CN108075452A (en) * | 2017-12-26 | 2018-05-25 | 苏州科爱佳自动化科技有限公司 | A kind of transmission line of electricity Self-Protection Subsystem |
| CN108011369B (en) * | 2017-12-26 | 2024-02-13 | 江苏科技大学 | Ship shore power system with fault diagnosis and alarm functions |
| CN108155631A (en) * | 2017-12-26 | 2018-06-12 | 苏州科爱佳自动化科技有限公司 | A kind of circuit ground failure removal system |
| CN108011369A (en) * | 2017-12-26 | 2018-05-08 | 江苏科技大学 | A kind of shipping shore power system with fault diagnosis and warning function |
| CN108152678A (en) * | 2017-12-26 | 2018-06-12 | 苏州科爱佳自动化科技有限公司 | A kind of fault automatic checkout system |
| CN108152649A (en) * | 2017-12-26 | 2018-06-12 | 苏州科爱佳自动化科技有限公司 | A kind of line fault intelligent scanning guard system |
| CN107968386B (en) * | 2017-12-26 | 2019-12-31 | 苏州科爱佳自动化科技有限公司 | Circuit fault source removing method |
| CN107968386A (en) * | 2017-12-26 | 2018-04-27 | 苏州科爱佳自动化科技有限公司 | A kind of fault source cutting method |
| CN108075452B (en) * | 2017-12-26 | 2020-06-09 | 苏州科爱佳自动化科技有限公司 | Self-protection system for power transmission line |
| CN108039701B (en) * | 2017-12-26 | 2020-06-12 | 苏州科爱佳自动化科技有限公司 | Circuit fault protection system |
| CN108155631B (en) * | 2017-12-26 | 2020-06-12 | 苏州科爱佳自动化科技有限公司 | Circuit ground fault removing system |
| CN109921394A (en) * | 2019-04-15 | 2019-06-21 | 江苏太航信息科技有限公司 | A kind of shipboard automation device with failure removal function |
| CN115065026A (en) * | 2022-05-31 | 2022-09-16 | 青岛和瑞德电力科技有限公司 | A high tension cable fast-assembling wiring system for bank electricity |
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Effective date of registration: 20150215 Address after: 212028 Zhenjiang Industrial Park, Dantu New District, Jiangsu No. five weft Road, No. 18 Patentee after: Jiangsu Hongan Transformer Co., Ltd. Patentee after: Zhenjiang Power Supply Company, Jiangsu Prov. Power Co. Address before: 212028 Zhenjiang Industrial Park, Dantu New District, Jiangsu No. five weft Road, No. 18 Patentee before: Jiangsu Hongan Transformer Co., Ltd. |
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