CN203398773U - Distribution network fault detection and isolation control system - Google Patents
Distribution network fault detection and isolation control system Download PDFInfo
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- CN203398773U CN203398773U CN201320409024.3U CN201320409024U CN203398773U CN 203398773 U CN203398773 U CN 203398773U CN 201320409024 U CN201320409024 U CN 201320409024U CN 203398773 U CN203398773 U CN 203398773U
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- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000002955 isolation Methods 0.000 title claims abstract description 14
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- 230000002159 abnormal effect Effects 0.000 description 1
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Abstract
The utility model discloses a distribution network fault detection and isolation control system which comprises opening and closing switches, voltage detection modules, zero sequence voltage acquisition modules, fault current acquisition modules and a controller. Each section of the distribution network is provided with a zero sequence voltage acquisition module for detecting the zero sequence voltage in the section. The zero sequence voltage exceeding limit value indicates that the section is single-phase earthed, and the controller accurately opens the opening and closing switch of the section based on the zero sequence voltage data, thereby realizing the purpose of isolating the section where single-phase earth fault occurs. Fault current is used as basis for determination. When no fault current is in a section of the distribution network, no fault is occurred in the section. Closing time-delay confirmation for reclosing of the transformer station is not required, and the switch can be directly controlled for closing. The power failure time for non-fault section can be minimized.
Description
Technical field
The utility model relates to power distribution network technology, relates in particular to feeder automation Fault Isolation technology.
Background technology
Existing Distribution Network Failure detection method is all generally to take voltage as failure criterion.Certain in three-phase voltage occurs that being judged as distribution when abnormal breaks down mutually, now transformer station's tripping operation, and after transformer station's reclosing, terminal is passed through time-delay closing step by step, when power transformation, pricks while again tripping, and can judge that this distribution section is fault section.Such scheme can not be realized Fault Isolation for the section that single phase ground fault occurs; For the section not breaking down, during substation secondary reclosing, need to pass through time-delay closing, increase the interruption duration of non-fault section.Therefore there is the problem of protection blind area and the non-fault section interruption duration of increase in prior art.
Summary of the invention
For the problems referred to above, the Distribution Network Failure that the utility model provides a kind of can realize single phase ground fault isolation features, effectively reduce non-fault section interruption duration detects isolation control system.
The utility model is that the technical scheme that its technical problem of solution adopts is:
Distribution Network Failure detects isolation control system, 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 the voltage detection module for detection 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, the control end of on-off switch is connected with controller.
Described residual voltage acquisition module is voltage transformer or the electronic voltage transducer with zero sequence voltage detection function.
The beneficial effects of the utility model are: the utility model detects the residual voltage in section in the set residual voltage acquisition module of each distribution section, when there is the residual voltage that surpasses 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, thereby realizes the isolation of single phase ground fault section; It is criterion that the utility model is further introduced fault current, when distribution section does not detect fault current, can determine that this section does not break down, transformer station does not need through combined floodgate delay confirmation during reclosing, directly control switch closes a floodgate, to reduce the interruption duration of non-fault section.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, be further detailed:
Fig. 1 is that system of the present utility model forms schematic diagram.
Embodiment
Distribution Network Failure of the present utility model detects isolation control system for the divide-shut brake situation of the different sections of distribution is controlled, and 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 on each distribution section for detection of the voltage detection module 2 of three-phase voltage size, be arranged in each distribution section residual voltage acquisition module 3 for gathering residual voltage data, be arranged on 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, in integrally-built mode, exist.This distribution terminal can be realized the mutual of data by different communication modes and controller 5.Residual voltage acquisition module 3 in the utility model preferably adopts voltage transformer SPS or the electronic voltage transducer EVT with zero sequence voltage detection function to realize.
Operation principle of the present utility model is as follows: the on-off switch in distribution section is when "on" position, residual voltage acquisition module detects after the residual voltage that is greater than preset value size, controller is controlled the on-off switch separating brake of this distribution section, realizes the isolation of this distribution section; On-off switch in distribution section is when "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, directly control its on-off switch and close a floodgate, to reduce the interruption duration of non-fault section.
Execution mode of the present utility model is not restricted to the described embodiments, as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection range of the present utility model.
Claims (2)
1. Distribution Network Failure detects isolation control system, it is characterized in that 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 the voltage detection module for detection 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.
2. Distribution Network Failure according to claim 1 detects isolation control system, it 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 |
|---|---|---|---|
| CN201320409024.3U CN203398773U (en) | 2013-07-10 | 2013-07-10 | Distribution network fault detection and isolation control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320409024.3U CN203398773U (en) | 2013-07-10 | 2013-07-10 | Distribution network fault detection and isolation control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203398773U true CN203398773U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320409024.3U Expired - Fee Related CN203398773U (en) | 2013-07-10 | 2013-07-10 | Distribution network fault detection and isolation control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203398773U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
- 2013-07-10 CN CN201320409024.3U patent/CN203398773U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20190710 |