CN107346880A - A kind of partition method of series coupled transformer - Google Patents
A kind of partition method of series coupled transformer Download PDFInfo
- Publication number
- CN107346880A CN107346880A CN201710532142.6A CN201710532142A CN107346880A CN 107346880 A CN107346880 A CN 107346880A CN 201710532142 A CN201710532142 A CN 201710532142A CN 107346880 A CN107346880 A CN 107346880A
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- CN
- China
- Prior art keywords
- series coupled
- coupled transformer
- electric quantity
- series
- quantity protective
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of partition method of series coupled transformer.The outlet order of series coupled transformer electric quantity protective is divided into wink dynamic order and deferred command.Bypass breaker is set up in each side of series coupled transformer, line-breaker is arranged on the circuit both sides that series coupled transformer seals in；When series coupled transformer electric quantity protective acts, exit relay corresponding to the wink dynamic order of series coupled transformer electric quantity protective turns on, and closes series coupled transformer bypass breaker；After delay, exit relay corresponding to the deferred command of series coupled transformer electric quantity protective turns on, wire jumper circuit breaker.The present invention can improve the transmission reliability of series coupled transformer line attachment.
Description
Technical field
The invention belongs to field of power, and in particular to a kind of partition method of series coupled transformer.
Background technology
In high-voltage electric power system, series coupled transformer is a kind of special transformer of purposes.Series coupled transformer
Notable feature is：Series coupled transformer at least side winding does not have neutral point, and the both ends of winding are linked into lead respectively
In circuit.The special connection type of series coupled transformer, can be by the winding voltage of series coupled transformer wire trackside winding
It is superimposed upon on line termination voltage, so, by the line side winding voltage for adjusting series coupled transformer, it is possible to control circuit
Transmission power.
At present, the common power flow control devices containing series coupled transformer have：THE UPFC, controllable phase shift
Device.The main purpose of the power flow control devices such as THE UPFC, controllable phase shifter is installed, is the trend point for improving power network
Cloth, improve the ability to transmit electricity of regional power grid.Generally, power flow control devices be operated in lifting this line trend transmission capacity with
Mitigate All other routes power transmission pressure, or reduce this line trend transmission capacity to force the working condition of trend reasonable layout.These
In equipment, integral electric quantity protective, the control side joint electric power of series coupled transformer after the double sets of series coupled transformer configuration are main
Control electronics.When system jam, current protection, the series coupled transformer of series coupled transformer control side
After electric quantity protective action, need series coupled transformer isolation.
Traditional transformer in power system, tripping operation breaker is only set, is not provided with combined floodgate breaker, failure removal
Method is tripping circuit breaker.Such as Fig. 2, when short trouble occurs in transformer area, after the action of transformer electric quantity protective, tripping
Each side breaker of transformer, such transformer just have left from system interval.For the transmission line of electricity of the transformer containing series coupled,
When series coupled transformer breaks down, according to conventional relay protection processing mode, direct tripping line-breaker, can incite somebody to action
Series coupled transformer is kept apart with AC system.But this processing method has some limitations.
If series coupled transformer breaks down, direct tripping line-breaker, then system load flow may be caused unexpected
Transfer, the trend capacity of other transmission lines of electricity is flown up, and then causes circuit thermostabilization problem.Further, since transformer
Maintenance cycle is longer,, then may hair when system other links break down if passway for transmitting electricity is off for a long time
Raw N-2 failures, influence stability of power system.
In order to solve the deficiency of above-mentioned series coupled transformer fault cutting method, it is necessary to a kind of event small to systematic influence
Hinder cutting method.
The content of the invention
In view of the shortcomings of the prior art, the present invention is intended to provide a kind of partition method of series coupled transformer, raising contain
The power system transmission reliability of series coupled transformer.
Above-mentioned technical purpose is realized, reaches above-mentioned technique effect, the present invention is achieved through the following technical solutions：
A kind of partition method of series coupled transformer, it is characterised in that：By going out for series coupled transformer electric quantity protective
Mouth order is divided into wink dynamic order and deferred command.Bypass breaker is set up in each side of series coupled transformer.Work as series coupled
Transformer electric quantity protective acts, and exit relay conducting corresponding to the wink dynamic order of series coupled transformer electric quantity protective, closes string
Join coupling transformer bypass breaker；After delay, outlet corresponding to the deferred command of series coupled transformer electric quantity protective after
Electrical equipment turns on, wire jumper circuit breaker.
Further, described series coupled transformer bypass breaker, it is characterised in that：Described bypass breaker tool
Body includes series side bypass breaker and non-series side bypass breaker.Series side bypass breaker is arranged on series coupled transformation
Device seals in the side winding both ends of system, non-series side bypass breaker be arranged on concatenation winding except series coupled transformer with
Other outer winding sides；
Further, the outlet order of described series coupled transformer electric quantity protective, it is characterised in that：Series coupled becomes
After the action of depressor electric quantity protective, wink dynamic order is sent without delay, will exit relay conducting corresponding to wink dynamic order；Work as series connection
Coupling transformer electric quantity protective is in operating state, and timer continues timing.If timer reaches series coupled before preset time
Transformer electric quantity protective is returned, then timer is reset.If timer reaches preset time, electric quantity protective sends deferred command, will
Exit relay corresponding to deferred command turns on；
Further, the wink of described series coupled transformer electric quantity protective dynamic order, it is characterised in that：Wink dynamic order pair
The exit relay answered is serially connected in the closing operation loop of each side bypass breaker of series coupled transformer, such outlet relay
When device turns on, bypass breaker closes a floodgate.
Further, the deferred command of described series coupled transformer electric quantity protective, it is characterised in that deferred command pair
The exit relay answered is serially connected in the line-breaker trip operation loop of series coupled transformer line attachment, such outlet
When relay turns on, line-breaker tripping operation.
Further, the timer of described series coupled transformer electric quantity protective, it is characterised in that：When timer is preset
Between by escape series coupled transformer bypass breaker closing time set, recommendation preset time is 100~200ms.
Beneficial effects of the present invention：
The present invention proposes a kind of partition method of series coupled transformer, it is ensured that series coupled transformer can effectively every
From while, reduce the situation of direct wire jumper circuit breaker, improve the transmission reliability of circuit.
Brief description of the drawings
Fig. 1 is the system architecture and capital equipment of the transformer containing series coupled；
Fig. 2 is the system architecture and capital equipment of conventional parallel transformer；
Fig. 3 is the relay protection region division of series coupled transformer working environment；
Fig. 4 is series coupled transformer outlet logical schematic.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The working method for analyzing series coupled transformer understands that, for series coupled transformer, most of failure only needs
By series coupled transformer bypass can isolated fault, such as non-series side may occur all types failure, series side hair
Raw series connection winding inter-turn failure etc..It should be noted that：For series side in addition to turn-to-turn fault, other failures belong to circuit simultaneously
In the range of protection and series coupled tranformer protection, for such failure, the event that series coupled transformer can not isolate is bypassed
Barrier, route protection can act prior to series coupled transformer electric quantity protective, wire jumper way switch, therefore, for series coupled transformation
For device, it may be preferable that need to only bypass series coupled transformer.
Compared with traditional transformer breaker configuration, the series coupled transformer in the present invention has installed series coupled change additional
Depressor bypass breaker, such as QF1, QF2 in Fig. 3, wherein QF1 is series side bypass breaker, and QF2 is that the bypass of non-series side is disconnected
Road device.The corresponding exit relay of order is moved into QF1, QF2 closing operation loop with series coupled transformer electric quantity protective wink
It is serially connected, the trip operation loop of QF3, QF4 in Fig. 3 is corresponding with series coupled transformer electric quantity protective deferred command
Exit relay be serially connected.
As shown in figure 4, after series coupled transformer electric quantity protective completes relay protective scheme computing, when meeting operation condition,
Electric quantity protective logical calculated element sends wink dynamic order, now its corresponding exit relay conducting, so connects without delay
Coupling transformer bypass breaker closes a floodgate, such as Fig. 1.
Sending wink dynamic order simultaneously, timing module starts timing.If in timing course, electric quantity protective logical calculated occurs
The situation of protection act condition is unsatisfactory for, then timer expiration, until next time electric quantity protective logical calculated meets to protect again
During operation condition, restart timing.
After timing, which counts, reaches preset time t, if electric quantity protective logical calculated element does not return yet, delay life is sent
Order, now its corresponding exit relay conducting, such line-breaker tripping operation.
The setting of preset time t, the closing time of series coupled transformer bypass breaker should be escaped.Recommend the time difference be
100~200ms.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
Merely illustrating the principles of the invention described in book, do not departing from spirit and scope of the invention, various change of the invention and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Thing defines.
Claims (7)
- A kind of 1. partition method of series coupled transformer, it is characterised in that：By the outlet of series coupled transformer electric quantity protective Wink dynamic order and deferred command are divided into order；Bypass breaker is set up in each side of series coupled transformer；Work as series coupled Transformer electric quantity protective acts, and exit relay conducting corresponding to the wink dynamic order of series coupled transformer electric quantity protective, closes string Join coupling transformer bypass breaker；After delay, outlet corresponding to the deferred command of series coupled transformer electric quantity protective after Electrical equipment turns on, wire jumper circuit breaker.
- 2. the partition method of a kind of series coupled transformer according to claim 1, it is characterised in that described bypass is broken Road implement body includes series side bypass breaker and non-series side bypass breaker；Series side bypass breaker is arranged on series connection coupling The side winding both ends that transformer is serially accessed to the circuit are closed, non-series side bypass breaker is arranged on except the concatenation of series coupled transformer Other winding sides beyond winding.
- 3. the wink of series coupled transformer electric quantity protective according to claim 1 dynamic order, it is characterised in that：Series coupled After the action of transformer electric quantity protective, wink dynamic order is sent without delay, will exit relay conducting corresponding to wink dynamic order.
- 4. the deferred command of series coupled transformer electric quantity protective according to claim 1, it is characterised in that：When series connection coupling Close transformer electric quantity protective and be in operating state, timer continues timing；Series coupled becomes before if timer reaches preset time Depressor electric quantity protective is returned, then timer is reset；If timer reaches preset time, electric quantity protective sends deferred command, will prolong Exit relay conducting corresponding to order late.
- 5. the wink of series coupled transformer electric quantity protective according to claim 1 dynamic order, it is characterised in that：Wink dynamic order Corresponding exit relay is serially connected in the closing operation loop of each side bypass breaker of series coupled transformer, above-mentioned outlet after When electrical equipment turns on, bypass breaker closes a floodgate.
- 6. the deferred command of series coupled transformer electric quantity protective according to claim 1, it is characterised in that：Deferred command Corresponding exit relay is serially connected in the line-breaker trip operation loop of series coupled transformer line attachment, it is above-mentioned go out During mouth relay conducting, line-breaker tripping operation.
- 7. the timer of series coupled transformer electric quantity protective according to claim 4, it is characterised in that：Timer is preset Time is set by the closing time for escaping series coupled transformer bypass breaker, and preset time is 100~200ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532142.6A CN107346880A (en) | 2017-07-03 | 2017-07-03 | A kind of partition method of series coupled transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710532142.6A CN107346880A (en) | 2017-07-03 | 2017-07-03 | A kind of partition method of series coupled transformer |
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| Publication Number | Publication Date |
|---|---|
| CN107346880A true CN107346880A (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710532142.6A Pending CN107346880A (en) | 2017-07-03 | 2017-07-03 | A kind of partition method of series coupled transformer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036200A (en) * | 2011-09-29 | 2013-04-10 | 深圳市华力特电气股份有限公司 | Control circuit and control method of non-electric quantity protection repeat relay |
| CN103545787A (en) * | 2013-09-22 | 2014-01-29 | 广东电网公司电力科学研究院 | Protecting system of unified power quality controller and protection control method of protecting system |
| CN203674688U (en) * | 2013-09-22 | 2014-06-25 | 广东电网公司电力科学研究院 | Unified electric energy quality controller protection system |
| CN106711970A (en) * | 2017-01-23 | 2017-05-24 | 南京南瑞继保电气有限公司 | Closing failure protection method for unified power flow controller provided with series transformer |
-
2017
- 2017-07-03 CN CN201710532142.6A patent/CN107346880A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036200A (en) * | 2011-09-29 | 2013-04-10 | 深圳市华力特电气股份有限公司 | Control circuit and control method of non-electric quantity protection repeat relay |
| CN103545787A (en) * | 2013-09-22 | 2014-01-29 | 广东电网公司电力科学研究院 | Protecting system of unified power quality controller and protection control method of protecting system |
| CN203674688U (en) * | 2013-09-22 | 2014-06-25 | 广东电网公司电力科学研究院 | Unified electric energy quality controller protection system |
| CN106711970A (en) * | 2017-01-23 | 2017-05-24 | 南京南瑞继保电气有限公司 | Closing failure protection method for unified power flow controller provided with series transformer |
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Application publication date: 20171114 |