CN106532659A - Control protective method for ultra-high-voltage direct-current engineering direct-current change-over switch with parallel structure - Google Patents
Control protective method for ultra-high-voltage direct-current engineering direct-current change-over switch with parallel structure Download PDFInfo
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- CN106532659A CN106532659A CN201611159846.5A CN201611159846A CN106532659A CN 106532659 A CN106532659 A CN 106532659A CN 201611159846 A CN201611159846 A CN 201611159846A CN 106532659 A CN106532659 A CN 106532659A
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- fracture
- over switch
- direct current
- current change
- direct
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- 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
- H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—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 distribution gear, e.g. bus-bar systems; for switching devices for switches
Abstract
The invention relates to a control protective method for an ultra-high-voltage direct-current engineering direct-current change-over switch with a parallel structure. The control protective method comprises the steps of determining a loop state according to information of two fractures of the direct-current change-over switch; when a switching-off operation of the direct-current change-over switch is executed, controlling a protective system to initially send out an auxiliary fracture switching-off instruction, and then to send out a main fracture switching-off instruction after a separating position state of the auxiliary fracture is received and subjected to preset time delay; if the separating position state of the auxiliary fracture is not received or the separating position state duration cannot satisfy the preset time delay, automatically stopping sequential control; when a switching-on operation of the direct-current change-over switch is executed, controlling the protective system to initially send out a main fracture switching-on instruction, and then to send out an auxiliary fracture switching-on instruction after a closing position state of the main fracture is received and subjected to preset time delay; and if the closing position state of the main fracture is not received or the closing position state duration cannot satisfy the preset time delay, automatically stopping sequential control. The control protective method can be widely applied to control and protection of the ultra-high-voltage direct-current engineering direct-current change-over switch.
Description
Technical field
The present invention relates to a kind of direct current change-over switch controls guard method, especially with regard to a kind of extra-high straightening of parallel-connection structure
The change-over switch control guard method of stream engineering direct current.
Background technology
In extra-high voltage direct-current engineering, it is to realize Ground return operation and the conversion of the metallic return method of operation, earthing pole
Ground connection and in standing earthing mode conversion and the transfer of fault current, metallic return change-over switch, big is configured with current conversion station
Earthed switch in earthed return change-over switch, neutral switch and station, direct current change-over switch adopt double-fracture series system.According to straight
The difference of position and effect of the stream change-over switch in major loop, DC control and protection system are configured with control adaptable therewith
Defencive function processed, in sequential control and relay protective scheme double-fracture cascaded structure direct current change-over switch be controlled by single break and
Protection, two fractures of series connection realize synchronization action by change-over switch.
It is with the continuous development of scientific and technological level and equipment manufacturing technology, extra-high voltage direct-current Project Realization electric pressure, defeated
Double liftings of capacity, project under construction voltage are sent to be promoted to ± 1100kV by ± 800kV, rated current is promoted to by 5000A
6250A.Due to the lifting of rated current, double-fracture cascaded structure direct current change-over switch cannot meet wanting for direct current through-current capability
Ask, therefore, rated capacity 10000MW extra-high voltage direct-current engineering has used the direct current change-over switch of parallel-connection structure, using three fractures
Series connection again and a single break or single break again and a single break structure, three fractures or single break are main fracture, fracture in parallel
To aid in fracture.
As direct current change-over switch employs parallel-connection structure, will be unable to configure its control protection work(according to single break switch
Can, the control of existing direct current change-over switch is no longer suitable for guard method, it is necessary to consider new with direct current change-over switch arrangement phase
The control guard method of adaptation.
As shown in Figure 1 and Figure 2, prior art extra-high voltage direct-current engineering adopts double 12 pulse conversion devices series wiring modes,
It is made up of converting plant, DC line and Inverter Station, capital equipment includes transverter, converter power transformer, smoothing reactor and direct current
The equipment such as change-over switch.Extra-high voltage direct-current engineering direct current change-over switch mainly has metallic return change-over switch (MRTB), the earth to return
Line change-over switch (GRTS), neutral switch (NBS), stand in earthed switch (NBGS), wherein metallic return change-over switch and big
Earthed return change-over switch is only configured in converting plant.
As shown in Figure 3, Figure 4, the direct current change-over switch of non-parallel-connection structure generally adopts double-fracture series system, controls in order
In system and relay protective scheme, double-fracture cascaded structure direct current change-over switch is controlled by single break and is protected, two fractures of series connection
Synchronization action is realized by change-over switch.The direct current change-over switch of parallel-connection structure, is connected again and a single break or list using three fractures
Fracture again and a single break structure, three fractures or single break are main fracture, and fracture in parallel is auxiliary fracture.
The content of the invention
For the problems referred to above, it is an object of the invention to provide a kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch
Control guard method, which obviates control system separating brake and protects that overlap may be while the contradiction for occurring, have ensured switch motion
Independence and operation safety.
For achieving the above object, the present invention takes technical scheme below：A kind of parallel-connection structure extra-high voltage direct-current engineering direct current
Change-over switch controls guard method, it is characterised in that comprise the following steps：1) sentenced according to two fracture information of direct current change-over switch
Disconnected loop state；2) when direct current change-over switch sub-switching operation is performed, Control protection system sends the separating brake of auxiliary fracture first
Order, in point position state for receiving auxiliary fracture and Jing after time delay set in advance, sends the separating brake order of main fracture；If not receiving
It is unsatisfactory for presetting time delay to auxiliary fracture point position state or a point position state duration, then sequential control is automatically stopped；3)
When direct current change-over switch closing operation is performed, Control protection system sends main fracture combined floodgate order first, is receiving main fracture
Conjunction position state and Jing after time delay set in advance, send auxiliary fracture combined floodgate order；If not receiving main fracture closes position state
Or conjunction position state duration is unsatisfactory for presetting time delay, then sequential control is automatically stopped；4) DC operation electric current exceedes and appoints
During the electric current tolerance of one fracture, direct current change-over switch overcurrent protection alert simultaneously sends drop power command automatically；
5), in the direct current protecting of triple modular redundant during the equal failure of main fracture loop current transformer, exit the related protection work(of the current transformer
Can, and forbid carrying out the conversion operation of direct current change-over switch；6), when only having main fracture conjunction position, Control protection system carries out direct current and turns
Change the comparison of switching circuitry electric current and main fracture loop current, alert when current differential is more than definite value.
The step 1) in：When existing control system judges the mode of connection, break when main fracture and with main fracture auxiliary simultaneously
Mouthful any one in close position when, then judge that loop is connection status；When two fractures are point position, loop is judged to disconnect shape
State.
The step 2) in, if the separating brake failure of auxiliary fracture, direct current protecting turns according to the direct current after filtered process
The difference triggering direct current change-over switch protection of the main fracture electric current changed after switching circuitry electric current and filtered process, protection act are sent out
Go out to overlap auxiliary fracture order.
The step 2) in, if the failure of main fracture separating brake, direct current protecting is according to the main fracture electric current after filtering process
The protection of triggering direct current change-over switch quick fraction turns according to the direct current change-over switch loop current triggering direct current after filtered process
Switch section protection at a slow speed is changed, protection act sends main fracture coincidence order, and after the time delay being set, send auxiliary fracture and overlapped
Order.
Due to taking above technical scheme, which has advantages below to the present invention：1st, the present invention is in direct current change-over switch separating brake
During with closing operation, control system is to main fracture and aids in fracture to send separating brake respectively and order of closing a floodgate, and control sequence clearly, is divided
Arranged by rational logic in lock and making process, it is to avoid control system separating brake is overlapped with protection may while the lance for occurring
Shield, has ensured the independence of switch motion.2nd, the present invention is by main fracture and aids in fracture excessively stream, the event of main fracture current transformer
The functions such as barrier, arrester and parallel oscillation loop inner fault monitoring are unified in the control protection of direct current change-over switch to be realized, control
Protection system processed can carry out real-time judge to the information of direct current change-over switch, therefore can be with the fortune of full-scope safeguards direct current change-over switch
Row safety.In present invention can be widely used to the control of extra-high voltage direct-current engineering direct current change-over switch and protecting.
Description of the drawings
Fig. 1 is extra-high voltage direct-current engineering main electrical scheme schematic diagram in prior art；
Fig. 2 is position view of the direct current change-over switch in extra-high voltage direct-current engineering in prior art；
Fig. 3 is non-parallel-connection structure direct current change-over switch schematic diagram in prior art；
Fig. 4 is the direct current change-over switch schematic diagram with parallel-connection structure in prior art；
Fig. 5 is direct current change-over switch separating brake process time diagram of the present invention；
Fig. 6 is direct current change-over switch making process time diagram of the present invention.
Specific embodiment
The extra-high voltage direct-current engineering direct current change-over switch control guard method of the parallel-connection structure of the present invention is by " main fracture and simultaneously
Connection auxiliary fracture " two parts are controlled defencive function design, with reference to the accompanying drawings and examples the present invention are carried out detailed
Description.
As shown in Figure 5, Figure 6, the present invention provides a kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch control and protects
Maintaining method, which comprises the following steps：
1) loop state is judged according to two fracture information of direct current change-over switch；
When existing control system judges the mode of connection, when main fracture and with main fracture auxiliary fracture simultaneously, any one is in conjunction
During position, then judge that loop is connection status；When two fractures are point position, judge that loop is off-state；
2) when direct current change-over switch sub-switching operation is performed, Control protection system sends the separating brake life of auxiliary fracture first
Order, in point position state for receiving auxiliary fracture and Jing after time delay set in advance, sends the separating brake order of main fracture；If not receiving
Auxiliary fracture point position state or a point position state duration are unsatisfactory for presetting time delay, then sequential control is automatically stopped；
If 2.1) aid in the failure of fracture separating brake, direct current protecting is according to the direct current change-over switch loop after filtered process
The difference triggering direct current change-over switch protection of the main fracture electric current after electric current and filtered process, protection act send coincidence auxiliary
Fracture order；
If 2.2) main fracture separating brake failure, direct current protecting turn according to the main fracture current trigger direct current after filtering process
Change the protection of switch quick fraction or direct current change-over switch is triggered at a slow speed according to the direct current change-over switch loop current after filtered process
Section protection, protection act send main fracture overlap order, and send after the time delay being set auxiliary fracture overlap order；
3) when direct current change-over switch closing operation is performed, Control protection system sends main fracture combined floodgate order first,
Receive the conjunction position state of main fracture and Jing after time delay set in advance, send the combined floodgate order of auxiliary fracture；If not receiving main disconnected
Mouth closes position state or closes position state duration and is unsatisfactory for presetting time delay, then sequential control is automatically stopped；
4), when DC operation electric current exceedes the electric current tolerance of arbitrary fracture, direct current change-over switch overcurrent protection sends report
Alarming information simultaneously sends drop power command automatically；
5), in the direct current protecting of triple modular redundant during the equal failure of main fracture loop current transformer, exit the current transformer related
Defencive function, and forbid carrying out the conversion operation of direct current change-over switch；
6) when being the short trouble, only main fracture conjunction position for monitoring arrester loop and parallel oscillation loop inner, control
Protection system carries out the comparison of direct current change-over switch loop current and main fracture loop current, and current differential is sent when being more than definite value
Warning message.
The various embodiments described above are merely to illustrate the present invention, and the structure of each part, size, set location and shape all can be
It is varied from, on the basis of technical solution of the present invention, all improvement individual part carried out according to the principle of the invention and waits
With converting, should not exclude outside protection scope of the present invention.
Claims (4)
1. a kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch controls guard method, it is characterised in that including following step
Suddenly：
1) loop state is judged according to two fracture information of direct current change-over switch；
2) when direct current change-over switch sub-switching operation is performed, Control protection system sends the separating brake order of auxiliary fracture first,
Receive point position state of auxiliary fracture and Jing after time delay set in advance, send the separating brake order of main fracture；If not receiving auxiliary
Fracture point position state or a point position state duration are unsatisfactory for presetting time delay, then sequential control is automatically stopped；
3) when direct current change-over switch closing operation is performed, Control protection system sends main fracture combined floodgate order first, is receiving
The conjunction position state of main fracture simultaneously, Jing after time delay set in advance, sends the combined floodgate order of auxiliary fracture；If not receiving main fracture conjunction
Position state or conjunction position state duration are unsatisfactory for presetting time delay, then sequential control is automatically stopped；
4), when DC operation electric current exceedes the electric current tolerance of arbitrary fracture, direct current change-over switch overcurrent protection sends alarm signal
Cease and send drop power command automatically；
5), in the direct current protecting of triple modular redundant during the equal failure of main fracture loop current transformer, exit the related protection of the current transformer
Function, and forbid carrying out the conversion operation of direct current change-over switch；
6), when only having main fracture and close position, Control protection system carries out direct current change-over switch loop current and main fracture loop current
Relatively, alert when current differential is more than definite value.
2. a kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch as claimed in claim 1 controls guard method, its
It is characterised by：The step 1) in：When existing control system judges the mode of connection, break when main fracture and with main fracture auxiliary simultaneously
Mouthful any one in close position when, then judge that loop is connection status；When two fractures are point position, loop is judged to disconnect shape
State.
3. a kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch as claimed in claim 1 controls guard method, its
It is characterised by：The step 2) in, if the separating brake failure of auxiliary fracture, direct current protecting turns according to the direct current after filtered process
The difference triggering direct current change-over switch protection of the main fracture electric current changed after switching circuitry electric current and filtered process, protection act are sent out
Go out to overlap auxiliary fracture order.
4. a kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch as claimed in claim 1 controls guard method, its
It is characterised by：The step 2) in, if the failure of main fracture separating brake, direct current protecting is according to the main fracture electric current after filtering process
The protection of triggering direct current change-over switch quick fraction turns according to the direct current change-over switch loop current triggering direct current after filtered process
Switch section protection at a slow speed is changed, protection act sends main fracture coincidence order, and after the time delay being set, send auxiliary fracture and overlapped
Order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159846.5A CN106532659B (en) | 2016-12-15 | 2016-12-15 | A kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch controls guard method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159846.5A CN106532659B (en) | 2016-12-15 | 2016-12-15 | A kind of parallel-connection structure extra-high voltage direct-current engineering direct current change-over switch controls guard method |
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| CN106532659A true CN106532659A (en) | 2017-03-22 |
| CN106532659B CN106532659B (en) | 2018-06-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769240A (en) * | 2017-10-27 | 2018-03-06 | 南方电网科学研究院有限责任公司 | The control method and device of direct current change-over switch |
| CN110896225A (en) * | 2019-11-29 | 2020-03-20 | 南方电网科学研究院有限责任公司 | Method and device for online putting third station of multi-terminal direct-current power transmission system into operation and storage medium |
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| CN102780200A (en) * | 2011-05-12 | 2012-11-14 | Abb技术有限公司 | Circuit arrangement and method for interrupting a current flow in a DC current path |
| WO2015062644A1 (en) * | 2013-10-30 | 2015-05-07 | Abb Technology Ltd | Circuit breaker |
| CN204597623U (en) * | 2015-05-14 | 2015-08-26 | 贵州大学 | A kind of solid converting switch |
| CN205283110U (en) * | 2016-01-04 | 2016-06-01 | Abb技术有限公司 | Direct current change over switch |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011041427A (en) * | 2009-08-18 | 2011-02-24 | Nissin Electric Co Ltd | Power unit for uninterruptible power work |
| CN102780200A (en) * | 2011-05-12 | 2012-11-14 | Abb技术有限公司 | Circuit arrangement and method for interrupting a current flow in a DC current path |
| WO2015062644A1 (en) * | 2013-10-30 | 2015-05-07 | Abb Technology Ltd | Circuit breaker |
| CN204597623U (en) * | 2015-05-14 | 2015-08-26 | 贵州大学 | A kind of solid converting switch |
| CN205283110U (en) * | 2016-01-04 | 2016-06-01 | Abb技术有限公司 | Direct current change over switch |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769240A (en) * | 2017-10-27 | 2018-03-06 | 南方电网科学研究院有限责任公司 | The control method and device of direct current change-over switch |
| CN107769240B (en) * | 2017-10-27 | 2019-12-03 | 南方电网科学研究院有限责任公司 | The control method and device of direct current change-over switch |
| CN110896225A (en) * | 2019-11-29 | 2020-03-20 | 南方电网科学研究院有限责任公司 | Method and device for online putting third station of multi-terminal direct-current power transmission system into operation and storage medium |
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| Publication number | Publication date |
|---|---|
| CN106532659B (en) | 2018-06-26 |
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