CN103384062B - Isolation control system of grid power distribution fault detection - Google Patents
Isolation control system of grid power distribution fault detection Download PDFInfo
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- CN103384062B CN103384062B CN201310288398.9A CN201310288398A CN103384062B CN 103384062 B CN103384062 B CN 103384062B CN 201310288398 A CN201310288398 A CN 201310288398A CN 103384062 B CN103384062 B CN 103384062B
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000002955 isolation Methods 0.000 title claims abstract description 17
- 238000012790 confirmation Methods 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The invention discloses a kind of isolation control system of grid power distribution fault detection, comprise on-off switch, voltage detection module, residual voltage acquisition module, fault current acquisition module and controller.The present invention detects in the residual voltage acquisition module set by each distribution section the residual voltage in section, when existence exceedes the residual voltage of limit value, show that this section exists the situation of single-phase earthing, controller can carry out separating brake to the on-off switch of this section exactly based on these residual voltage data, thus realizes the isolation of single phase ground fault section; It is criterion that the present invention introduces fault current further, when distribution section does not detect fault current, can determine that this section does not break down, not need through combined floodgate delay confirmation during transformer station's reclosing, direct control switch closes a floodgate, to reduce the interruption duration of non-faulting section.
Description
Technical field
The present invention relates to distribution network technology, particularly relate to feeder automation Fault Isolation technology.
Background technology
Existing Distribution Network Failure detection method is all generally be failure criterion with voltage.Certain phase in three-phase voltage is judged as that distribution is broken down when occurring abnormal, now transformer station's tripping operation, and after transformer station's reclosing, terminal is step by step through time-delay closing, when power transformation bundle trips again, can judge that this distribution section is fault section.Such scheme can not realize Fault Isolation for the section that single phase ground fault occurs; For the section do not broken down, need during substation secondary reclosing through time-delay closing, increase the interruption duration of non-faulting section.Therefore there is protection blind area and increase the problem of non-faulting section interruption duration in prior art.
Summary of the invention
For the problems referred to above, the invention provides a kind of isolation control system of grid power distribution fault detection that can realize single phase ground fault isolation features, effectively reduce non-faulting section interruption duration.
The technical scheme that the present invention adopts for its technical problem of solution is:
Isolation control system of grid power distribution fault detection, comprising: be arranged on each distribution section for controlling the on-off switch of this distribution section divide-shut brake; Be arranged in each distribution section for detecting the voltage detection module of three-phase voltage size; Be arranged in each distribution section for gathering the residual voltage acquisition module of residual voltage data; Be arranged in each distribution section for gathering the fault current acquisition module of fault current data; And for controlling the controller of on-off switch action, the output of voltage detection module, residual voltage acquisition module, fault current acquisition module is connected with controller, and the control end of on-off switch is connected with controller; When on-off switch in distribution section is in "on" position, after residual voltage acquisition module detects the residual voltage being greater than preset value size, controller controls the on-off switch separating brake of this distribution section, realizes the isolation of this distribution section; When on-off switch in distribution section is in "on" position, fault current acquisition module does not detect fault current, and the on-off switch for this distribution section during distribution secondary reclosing does not need through delay confirmation, directly controls its on-off switch and closes a floodgate.
Described residual voltage acquisition module is voltage transformer or the electronic voltage transducer with zero sequence voltage detection function.
The invention has the beneficial effects as follows: the present invention detects in the residual voltage acquisition module set by each distribution section the residual voltage in section, when existence exceedes the residual voltage of limit value, show that this section exists the situation of single-phase earthing, controller can carry out separating brake to the on-off switch of this section exactly based on these residual voltage data, thus realizes the isolation of single phase ground fault section; It is criterion that the present invention introduces fault current further, when distribution section does not detect fault current, can determine that this section does not break down, not need through combined floodgate delay confirmation during transformer station's reclosing, direct control switch closes a floodgate, to reduce the interruption duration of non-faulting section.
Accompanying drawing explanation
Be further detailed below in conjunction with the drawings and specific embodiments:
Fig. 1 is system of the present invention composition schematic diagram.
Embodiment
Isolation control system of grid power distribution fault detection of the present invention is used for controlling the divide-shut brake situation of the different sections in distribution, realizes Fault Isolation.
As shown in Figure 1, control system comprise be arranged on each distribution barrier section for control this distribution section divide-shut brake on-off switch 1, be arranged in each distribution section for detect three-phase voltage size voltage detection module 2, be arranged in each distribution section for gather residual voltage data residual voltage acquisition module 3, be arranged in each distribution section for gather fault current data fault current acquisition module 4 and, for controlling the controller 5 of on-off switch action.The output of voltage detection module 2, residual voltage acquisition module 3, fault current acquisition module 4 is connected with controller 5, and the control end of on-off switch 1 is connected with controller 5.Above-mentioned voltage detection module 2, residual voltage acquisition module 3, fault current acquisition module 4 and on-off switch 1 are generally positioned in single distribution terminal, exist in integrally-built mode.This distribution terminal can realize the mutual of data by different communication modes and controller 5.Residual voltage acquisition module 3 in the present invention preferably adopts the voltage transformer SPS with zero sequence voltage detection function or electronic voltage transducer EVT to realize.
Operation principle of the present invention is as follows: when the on-off switch in distribution section is in "on" position, after residual voltage acquisition module detects the residual voltage being greater than preset value size, controller controls the on-off switch separating brake of this distribution section, realizes the isolation of this distribution section; When on-off switch in distribution section is in "on" position, fault current acquisition module does not detect fault current, on-off switch for this distribution section during distribution secondary reclosing does not need through delay confirmation, its on-off switch of direct control closes a floodgate, to reduce the interruption duration of non-faulting section.
Embodiments of the present invention are not restricted to the described embodiments, as long as it reaches technique effect of the present invention with substantially identical means, all should belong to protection scope of the present invention.
Claims (2)
1. isolation control system of grid power distribution fault detection, is characterized in that, this system is used for single phase ground fault, comprising:
Be arranged on each distribution section for controlling the on-off switch of this distribution section divide-shut brake;
Be arranged in each distribution section for detecting the voltage detection module of three-phase voltage size;
Be arranged in each distribution section for gathering the residual voltage acquisition module of residual voltage data;
Be arranged in each distribution section for gathering the fault current acquisition module of fault current data; And,
For controlling the controller of on-off switch action, the output of voltage detection module, residual voltage acquisition module, fault current acquisition module is connected with controller, and the control end of on-off switch is connected with controller;
When on-off switch in distribution section is in "on" position, after residual voltage acquisition module detects the residual voltage being greater than preset value size, controller controls the on-off switch separating brake of this distribution section, realizes the isolation of this distribution section;
When on-off switch in distribution section is in "on" position, fault current acquisition module does not detect fault current, and the on-off switch for this distribution section during distribution secondary reclosing does not need through delay confirmation, directly controls its on-off switch and closes a floodgate.
2. isolation control system of grid power distribution fault detection according to claim 1, is characterized in that described residual voltage acquisition module is voltage transformer or the electronic voltage transducer with zero sequence voltage detection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310288398.9A CN103384062B (en) | 2013-07-10 | 2013-07-10 | Isolation control system of grid power distribution fault detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310288398.9A CN103384062B (en) | 2013-07-10 | 2013-07-10 | Isolation control system of grid power distribution fault detection |
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| CN103384062A CN103384062A (en) | 2013-11-06 |
| CN103384062B true CN103384062B (en) | 2016-04-27 |
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| CN201310288398.9A Active CN103384062B (en) | 2013-07-10 | 2013-07-10 | Isolation control system of grid power distribution fault detection |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698647B (en) * | 2013-12-23 | 2016-06-22 | 广东电网公司茂名供电局 | A kind of automatic testing method of Single-phase Earth Fault of Power System |
| CN108628215A (en) * | 2018-05-19 | 2018-10-09 | 安徽国电京润电力科技有限公司 | A kind of Distribution Network Failure detection isolation automatic control system |
| CN108899862A (en) * | 2018-06-21 | 2018-11-27 | 江苏中房电力安装工程有限公司 | A kind of substation's Distribution Network Failure detection isolation automatic control system |
| CN112540322A (en) * | 2020-12-29 | 2021-03-23 | 广东电网有限责任公司电力科学研究院 | Line selection method, device and equipment for single-phase earth fault line of feeder line of transformer substation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3433616A1 (en) * | 1984-08-08 | 1986-02-20 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | PROTECTIVE DEVICE FOR AN ELECTRICAL NET |
| CN2472395Y (en) * | 2001-02-28 | 2002-01-16 | 西安前进电器实业有限公司 | Automatic fault monitoring terminals for power distribution |
| CN201398071Y (en) * | 2009-02-25 | 2010-02-03 | 北京盛华宏业科技有限公司 | Low current ground fault automatic isolation device based on line recloser |
| CN102487217A (en) * | 2010-12-02 | 2012-06-06 | 北京水木源华电气有限公司 | Automated remote terminal of power distribution line |
-
2013
- 2013-07-10 CN CN201310288398.9A patent/CN103384062B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3433616A1 (en) * | 1984-08-08 | 1986-02-20 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | PROTECTIVE DEVICE FOR AN ELECTRICAL NET |
| CN2472395Y (en) * | 2001-02-28 | 2002-01-16 | 西安前进电器实业有限公司 | Automatic fault monitoring terminals for power distribution |
| CN201398071Y (en) * | 2009-02-25 | 2010-02-03 | 北京盛华宏业科技有限公司 | Low current ground fault automatic isolation device based on line recloser |
| CN102487217A (en) * | 2010-12-02 | 2012-06-06 | 北京水木源华电气有限公司 | Automated remote terminal of power distribution line |
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