CN103779840B - Connection cutting system - Google Patents
Connection cutting system Download PDFInfo
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- CN103779840B CN103779840B CN201210397843.0A CN201210397843A CN103779840B CN 103779840 B CN103779840 B CN 103779840B CN 201210397843 A CN201210397843 A CN 201210397843A CN 103779840 B CN103779840 B CN 103779840B
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- transformer
- side switch
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- medium voltage
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- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The invention discloses one kind connection cutting system, it includes multiple transformers, the transformer is sequentially connected in series between a power station and an electrical equipment, each transformer is respectively connected with a steady control switch, the steady control switch is electrically connected with a server, and the server is used for the switch motion by the steady control switch control transformer；The server also collects the on off state of each side of each transformer by the steady control switch, and judges whether power station has in island state.When wherein described cutting system works, the switch of each side of each transformer is in closure state；When the switching off of any one side of any one transformer, the server switches off the medium voltage side of the transformer and the switch of low-pressure side by the steady control being connected with the transformer for being connected to the power station.When power station forms isolated island, the transformer that will be connected with power station disconnects cutting system of the invention with the connection in power station, so as to ensure the safety of power station and equipment.
Description
Technical field
The present invention relates to one kind connection cutting system, more particularly to a kind of isolated island for preventing multistage transformer in the power network of power station is imitated
The connection cutting system answered.
Background technology
Isolated island effect prevention mainly takes the method that connection is cut in the power network in existing power station, in case relative form big power supply for small negative
Power supply and equipment safety problem that lotus triggers.
Existing Union Switch Device be local transformer relay protecting device judge this high voltage side of transformer switch off, in
After pressure side or low-pressure side still have power supply, the switch that will have the side of power supply quickly disconnects, and otherwise big Power supply belt Smaller load can endanger
Equipment safety.Work as upper level（High voltage side of transformer）When circuit breaks down, Union Switch Device connection cuts one-level（Pressed in transformer
Side and low-pressure side）In power circuit.
If similarly there is problem tripping operation to the upper level supply line that transformer is uniquely powered, medium voltage side and low-pressure side
Action logic should be identical, but due to mutually isolated between local relay protection and upper level protective relaying device, institute
Cannot judge whether higher level's line switching has disconnected with local relay protection, so the connection of transformer cannot be realized in such case
Cut.
The content of the invention
The technical problem to be solved in the present invention is cannot realize multiple changes in multistage transformer in the prior art to overcome
The defect that the connection of depressor is cut, there is provided one kind connection cutting system, by detecting each transformer mesohigh side, medium voltage side in the power network of power station
Realize that multiple transformer connection are cut with the on off state of low-pressure side.
The present invention is to solve above-mentioned technical problem by following technical proposals：
The invention provides one kind connection cutting system, it is characterized in that the cutting system includes multiple transformers, wherein described
Transformer is sequentially connected in series between a power station and an electrical equipment, and each transformer is respectively connected with a steady control switch, described
Steady control switch is electrically connected with a server, and the server is used for the high pressure by the steady control switch control transformer
The switch motion of side switch, medium voltage side switch and low-side switch；The server also collects each by the steady control switch
The on off state of the high side switch, medium voltage side switch and low-side switch of transformer；Judge whether power station has in isolated island
State.
When wherein described cutting system works, the high side switch of each transformer, medium voltage side are switched and low-side switch
It is in closure state；When high side switch, medium voltage side switch or low-side switch when any one transformer disconnect, the clothes
Business device switches off the institute for being directly connected in the power station by the steady control being connected with the transformer for being directly connected in the power station
State the medium voltage side switch and low-side switch of transformer.
Cutting system of the invention is made up of switch and control system, is configured at series-fed or T-shaped wiring is powered is
System, for the control of the Based Intelligent Control of power station power supply, particularly isolated island effect prevention.
It is preferred that when any one transformer high side switch disconnect when, the server also by with high side switch
Disconnect the transformer electrical connection steady control switch off high side switch disconnection the transformer medium voltage side switch and
Low-side switch.
It is preferred that when high side switch, the medium voltage side switch or low-side switch when any one transformer disconnect, the clothes
Business device is switched off by the steady control being connected with the transformer for being directly connected in the electrical equipment and is directly connected in the electricity consumption
The medium voltage side switch and low-side switch of the transformer of equipment.
Positive effect of the invention is：
Cutting system of the invention, by detecting each transformer mesohigh side, medium voltage side and low-pressure side in the power network of power station
On off state, if when forming isolated island, the transformer that will be connected with power station disconnects with the connection in power station, so as to equivalent to excision electricity
Source, so as to ensure the safety of rear class circuit and equipment.
In addition also realize preventing by the medium voltage side of transformer that breaks down of disconnection and the switch of low-pressure side in the present invention
The only generation of isolated island.
The last present invention breaks the transformer being connected with electrical equipment with the connection of electrical equipment also when isolated island is formed
Open, further prevent big power supply for the infringement of the electrical equipment of Smaller load initiation.
Brief description of the drawings
Fig. 1 is the structural representation of the first embodiment of cutting system of the invention.
Specific embodiment
Present pre-ferred embodiments are given below in conjunction with the accompanying drawings, to describe technical scheme in detail.
First embodiment：
Join cutting system in the present embodiment by detecting the high-pressure side of each transformer in multistage statements based on collusion power supply, medium voltage side and low
Press whether the switch of side disconnects judging whether that island effect can be produced, so that the voltage device electrically connected with power station by disconnection
Switch, so as to realize the excision of power supply, so as to protect the Electrical Safety of power station and electrical equipment.
Wherein as shown in figure 1, the connection cutting system of the present embodiment includes a transformer 1a, a transformer 1b and a transformer
1c.Wherein described transformer 1a, transformer 1b and transformer 1c are sequentially connected in series between a power station and an electrical equipment.The electricity
The electric energy for generating of standing passes sequentially through transformer 1a, transformer 1b and transformer 1c and is converted into the electricity that the electrical equipment can be used
The standard of energy.
And transformer 1a described in the present embodiment, transformer 1b and transformer 1c connect a steady control switch 2a, one respectively
Steady control switch 2b and surely controls switch 2c.Wherein described steady control switch 2a gathers high side switch, the middle pressure of the transformer 1a
Side switchs the on off state with low-side switch, and reaches a server 3.The steady control switch 2b gathers the transformer 1b's
The on off state of high side switch, medium voltage side switch and low-side switch, and reach the server 3.The steady control switch 2c
The on off state of the high side switch, medium voltage side switch and low-side switch of the transformer 1c is gathered, and reaches the service
Device 3.
In addition the steady control switch 2a also controls the high side switch of the transformer 1a, medium voltage side switch and low-pressure side to open
The switch motion of pass.The steady control switch 2b also controls the high side switch of the transformer 1b, medium voltage side switch and low-pressure side
The switch motion of switch.The steady control switch 2b also controls the high side switch of the transformer 1b, medium voltage side switch and low pressure
The switch motion of side switch.
In the present embodiment, when the standard of electric energy needed for the electric energy in power station normally can be converted into electrical equipment, the change
Depressor 1a, the high side switch of transformer 1b and transformer 1c, medium voltage side switch and low-side switch are in closure state.
As transformer 1a, transformer 1b and in transformer 1c, the high side switch of any one transformer, medium voltage side are switched
Or during low-side switch disconnection, the server 3 is switched off by the steady control being connected with the transformer for being connected to the power station
The medium voltage side switch and low-side switch of the transformer.For example when the high side switch of transformer 1b disconnects, the service
When device 3 is off by the high side switch that the steady control switch 2b collections detect the transformer 1b, the clothes
Business device 3 is again switched the medium voltage side of transformer 1a by the steady control switch 2a and low-side switch disconnects.
In addition when transformer 1a or transformer 1c high side switch, medium voltage side switch or low-side switch are disconnected in the present embodiment
Open or transformer 1b medium voltage side switch or low-side switch disconnect when, the server 3 is detecting the disconnection shape of switch
After state, 2a is switched by steady control and disconnects the medium voltage side switch and low-side switch of transformer 1a.
The present embodiment can directly contact this level, higher level, top-ranking and the top-ranking of each transformer in statements based on collusion circuit
Etc. running status, so that Determines of the server in the switch by stage transformers mesohigh side, medium voltage side or low-pressure side
Whether need to cut off power circuit, the more rational control provided for the power supply of user equipment is provided.
Second embodiment：
The connection cutting system of the present embodiment is realizing the excision of power supply, so as to protect the Electrical Safety of power station and electrical equipment
Meanwhile, the also generation by disconnecting the switch of the transformer medium voltage side and low-pressure side for breaking down to realize preventing isolated island.
So the connection cutting system of the present embodiment is with the difference of the connection cutting system of first embodiment：The transformer 1a, change
In depressor 1b and transformer 1c any one transformer high side switch disconnect when, the server 3 also by with the change
The steady control of depressor electrical connection switches off the medium voltage side switch and low-side switch of the transformer.
For example, when the high side switch of transformer 1b disconnects, the server 3 by the steady control switch 2b except being received
When the high side switch that collection detects the transformer 1b is off, the server 3 is again by the steady control switch
2a disconnects the medium voltage side switch and low-side switch of transformer 1a, and the server 3 will also be become by steady control switch 2b
The medium voltage side switch and low-side switch of depressor 1b disconnect.
If transformer 1a or transformer 1c high side switch disconnect in addition, the server 3 switchs 2a again by steady control
Or steady control switch 2c disconnects the medium voltage side switch and low-side switch of transformer 1a or transformer 1c.
The present embodiment can directly cut off the transformer that may result in island effect in sum, realize more adduction
The control provided for the power supply of user equipment of reason.
3rd embodiment：
The change that the connection cutting system of the present embodiment also connects electrical equipment on the basis of the connection cutting system of second embodiment
Depressor disconnects with the connection of electrical equipment, so that the connection of the transformer of power station, electrical equipment and series connection is thoroughly disconnected, so that
Big power supply is further prevented for the infringement of the electrical equipment of Smaller load initiation.
So the connection cutting system of the present embodiment is with the difference of the connection cutting system of second embodiment：The transformer 1a, change
When the high side switch of any one transformer, medium voltage side switch or low-side switch disconnect in depressor 1b and transformer 1c, institute
State steady control of the server 3 also by being connected with the transformer 1c for being connected to the electrical equipment and switch the 2c disconnections transformer 1c
Medium voltage side switch and low-side switch.
For example, when the high side switch of transformer 1b disconnects, the server 3 by the steady control switch 2b except being received
When the high side switch that collection detects the transformer 1b is off, the server 3 is again by the steady control switch
2a disconnects the medium voltage side switch and low-side switch of transformer 1a, and the server 3 will also be become by steady control switch 2b
Outside the medium voltage side switch and low-side switch of depressor 1b disconnect, the server 3 also passes through steady control switch 2c by transformer 1c
Medium voltage side switch and low-side switch disconnect.
Additionally, when transformer 1a or transformer 1c high side switch, medium voltage side switch or low-side switch in the present embodiment
When the medium voltage side switch or low-side switch of disconnection or transformer 1b disconnect, the server 3 is detecting the disconnection of switch
After state, 2c can also be switched by steady control and disconnect the medium voltage side switch and low-side switch of transformer 1c.
The present embodiment further cuts off statements based on collusion circuit from electrical equipment, so as to more thoroughly eliminate any statements based on collusion line
Island effect problem caused by road.So as to realize the more rational control provided for the power supply of user equipment.
Although the foregoing describing specific embodiment of the invention, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
On the premise of principle of the invention and essence, various changes or modifications can be made to these implementation methods, but these are changed
Protection scope of the present invention is each fallen within modification.
Claims (2)
1. it is a kind of to join cutting system, it is characterised in that the cutting system includes multiple transformers, wherein the transformer is gone here and there successively
Connection is connected between a power station and an electrical equipment, and each transformer is respectively connected with a steady control switch, the steady control switch with
One server is electrically connected, and the server is used for high side switch, middle pressure by the steady control switch control transformer
Side switchs the switch motion with low-side switch；The server also collects the high pressure of each transformer by the steady control switch
The on off state of side switch, medium voltage side switch and low-side switch；
When wherein described cutting system works, the high side switch of each transformer, medium voltage side are switched and low-side switch is located
In closure state；When high side switch, medium voltage side switch or low-side switch when any one transformer disconnect, the server
The change for being directly connected in the power station is switched off by the steady control being connected with the transformer for being directly connected in the power station
The medium voltage side switch and low-side switch of depressor；When the high side switch of any one transformer disconnects, the server also leads to
Cross the transformer that the steady control electrically connected with the transformer of high side switch disconnection switches off high side switch disconnection
Medium voltage side switch and low-side switch.
2. it is as claimed in claim 1 to join cutting system, it is characterised in that high side switch, medium voltage side when any one transformer
When switch or low-side switch disconnect, the server is connected steady by with the transformer for being directly connected in the electrical equipment
Control switches off the medium voltage side switch and low-side switch of the transformer for being directly connected in the electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210397843.0A CN103779840B (en) | 2012-10-18 | 2012-10-18 | Connection cutting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210397843.0A CN103779840B (en) | 2012-10-18 | 2012-10-18 | Connection cutting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103779840A CN103779840A (en) | 2014-05-07 |
| CN103779840B true CN103779840B (en) | 2017-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210397843.0A Active CN103779840B (en) | 2012-10-18 | 2012-10-18 | Connection cutting system |
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| CN (1) | CN103779840B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967130B (en) * | 2015-04-29 | 2017-09-29 | 酒泉钢铁(集团)有限责任公司 | The AVC control methods of the convertible power system of networking/isolated network |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2806162B2 (en) * | 1992-08-18 | 1998-09-30 | 三菱電機株式会社 | Switch |
| CN101557101B (en) * | 2008-10-14 | 2012-06-20 | 吴宏斌 | Relay protection method for eliminating failure in transformer dead zone |
| CN101478177B (en) * | 2009-01-08 | 2011-04-13 | 杭州市电力局 | Safe automatic control method suitable for transforming plant main transformer tripping |
| CN102545377B (en) * | 2012-02-13 | 2013-04-10 | 国家电网公司 | Adaptive spare power automatic switching intertripping device based on substation measurement and control digital quantity |
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2012
- 2012-10-18 CN CN201210397843.0A patent/CN103779840B/en active Active
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| CN103779840A (en) | 2014-05-07 |
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