CN108400610A - The current conversion station of Multi-end flexible direct current transmission system puts into method and apparatus online - Google Patents
The current conversion station of Multi-end flexible direct current transmission system puts into method and apparatus online Download PDFInfo
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- CN108400610A CN108400610A CN201810249220.6A CN201810249220A CN108400610A CN 108400610 A CN108400610 A CN 108400610A CN 201810249220 A CN201810249220 A CN 201810249220A CN 108400610 A CN108400610 A CN 108400610A
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- conversion station
- current conversion
- sending end
- voltage
- station
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
An embodiment of the present invention provides a kind of current conversion stations of Multi-end flexible direct current transmission system to put into method and apparatus online, first, it controls the first sending end current conversion station band DC line and operation is unlocked with STATCOM patterns, the positive DC voltage UdP1 and negative DC voltage UdN1 of the outlet of the first sending end current conversion station are gradually stabilized to rated value；Then, the isolation switch of control dc circuit breaker both sides is closed；Secondly, the desired value of the first sending end current conversion station DC voltage control is switched to the measured value of operation current conversion station by rated value, the voltage difference of dc circuit breaker both sides is made to be less than preset value；Finally, control dc circuit breaker is closed, and the first sending end current conversion station is by control DC voltage pattern switching to control Active power mode, to which the first sending end current conversion station is put into Multi-end flexible direct current transmission system.The invention can carry out the online input operation at third station under the premise of it is not necessary that the current conversion station of operation is stopped transport, to improve the flexibility of Multi-end flexible direct current transmission system operation.
Description
Technical field
The invention belongs to Multi-end flexible direct current transmission system control protection technique field, more particularly to a kind of multiterminal are flexible straight
The current conversion station of stream transmission system puts into method and apparatus online.
Background technology
Importance of the flexible direct current power transmission system in direct current transportation field is increasingly enhanced, multi-terminal system (i.e. Installed System Memory
In multiple current conversion stations) the characteristics of can more embodying flexible transmission of electricity, but the startup control of multi-terminal system is necessarily faced in engineer application
And critical problem urgently to be resolved hurrily.
The originally design of the three-terminal flexible direct-current power transmission system of early stage does not connect in DC line, bus rod or direct current pole busbar
It connects place's installing and the disjunction equipment of DC current can be cut off, therefore the online input operation at third station can not be carried out, two stations turn every time
When three station operations, need that first the current conversion station of operation is stopped transport, under stoppage in transit state, operation direct current pole connects third station every knife,
Three stations are another to play operation to unlock operating status, and Multi-end flexible direct current transmission system operational flexibility is inadequate.
Invention content
The technical problem to be solved by the present invention is to provide a kind of current conversion station of Multi-end flexible direct current transmission system to throw online
Enter method and apparatus, the online input behaviour at third station can be carried out under the premise of it is not necessary that the current conversion station of operation is stopped transport
Make, improves the flexibility of multi-terminal direct current transmission system operation.
On the one hand the embodiment of the present invention provides a kind of current conversion station of Multi-end flexible direct current transmission system and puts into method online,
Including：
When receiving the first isolation switch close commands, the direct current pole isolation switch of the first sending end current conversion station is closed；
When receiving unlocking command, controls the first sending end current conversion station band DC line STATCOM patterns and unlock, make
The first sending end current conversion station is obtained to be operated in control DC voltage pattern and transport using load voltage value V1 as DC voltage desired value
Row；Direct current pole isolation switch includes positive isolation switch and cathode isolation switch；
When receiving the second isolation switch close commands, control is connected to bus rod and the first sending end current conversion station
Between the isolation switch of dc circuit breaker both sides close；The dc circuit breaker includes positive DC breaker and negative DC
Breaker；The bus rod includes the positive bus rod being connected between the second sending end current conversion station and receiving end current conversion station and bears
Pole bus rod；
When meeting online input enabled condition and receiving online input order, by the first sending end current conversion station
DC voltage desired value is switched to the DC bus measurement voltage V2 of the second sending end current conversion station by V1；V2 send for described second
Hold the difference of the positive Current Voltage UdP2 and cathodal current voltage UdN2 of current conversion station；
Work as satisfaction | (UdP1-UdN1)-V2 |<When △, controls the dc circuit breaker and be closed；△ is preset voltage difference
Threshold value；
After detecting that the dc circuit breaker is closed, controls the first sending end current conversion station and cut by control DC voltage pattern
Control Active power mode is changed to, Multi-end flexible direct current transmission system is switched to three stations from the operation of two stations and runs, and makes described first to send
End current conversion station puts into the receiving end current conversion station and the Multi-end flexible direct current transmission system where the second sending end current conversion station.
Preferably, the online input enabled condition be the first sending end current conversion station it is in operating status, described first
The direct current pole isolation switch of sending end current conversion station is in state of closing, the isolation switch of the dc circuit breaker both sides is in and closes shape
State, the second sending end current conversion station and the receiving end current conversion station are in two station normal release states.
Preferably, the method further includes：
When detecting abnormal during the input of the first sending end current conversion station, it is latched the first sending end change of current
It stands, disconnects the AC circuit breaker of the dc circuit breaker and the first sending end current conversion station.
Preferably, V1 is 320 kilovolts, and V3 is 3 kilovolts.
On the other hand the embodiment of the present invention provides a kind of current conversion station of Multi-end flexible direct current transmission system and puts into dress online
It sets, including：
First disconnecting link control module, for when receiving the first isolation switch close commands, closing the first sending end change of current
The direct current pole isolation switch stood；
Lock module is unblocked, for when receiving unlocking command, controlling the first sending end current conversion station band DC line
STATCOM patterns unlock so that the first sending end current conversion station is operated in control DC voltage pattern and is made with load voltage value V1
It is run for DC voltage desired value；Direct current pole isolation switch includes positive isolation switch and cathode isolation switch；
Second disconnecting link control module, for when receiving the second isolation switch close commands, it is female that control is connected to confluence
The isolation switch of dc circuit breaker both sides between line and the first sending end current conversion station closes；The dc circuit breaker includes just
Pole dc circuit breaker and negative DC breaker；The bus rod includes being connected to the second sending end current conversion station and receiving end current conversion station
Between positive bus rod and cathode bus rod；
Target voltage handover module, for when meeting online input enabled condition and receiving online input order,
The DC bus that the DC voltage desired value of the first sending end current conversion station is switched to the second sending end current conversion station by V1 is real
Survey voltage V2；V2 is the difference of the positive Current Voltage UdP2 and cathodal current voltage UdN2 of the second sending end current conversion station；
Breaker control module, for when satisfaction | (UdP1-UdN1)-V2 |<When △, controls the dc circuit breaker and close
It closes；△ is preset voltage difference threshold value；
Mode switch module, for after detecting that the dc circuit breaker is closed, controlling the first sending end current conversion station
By control DC voltage pattern switching to control Active power mode, from two stations, operation is switched to three stations to Multi-end flexible direct current transmission system
Operation, makes that the first sending end current conversion station puts into the receiving end current conversion station and the multiterminal where the second sending end current conversion station are soft
Property DC transmission system.
Preferably, the online input enabled condition be the first sending end current conversion station it is in operating status, described first
The direct current pole isolation switch of sending end current conversion station is in state of closing, the isolation switch of the dc circuit breaker both sides is in and closes shape
State, the second sending end current conversion station and the receiving end current conversion station are in two station normal release states.
Preferably, described device further includes：
Exception processing module, for when detecting abnormal during the input of the first sending end current conversion station, being latched
The first sending end current conversion station disconnects the AC circuit breaker of the dc circuit breaker and the first sending end current conversion station.
Preferably, V1 is 320 kilovolts, and V3 is 3 kilovolts.
Compared with the prior art, the advantageous effect of the embodiment of the present invention is：An embodiment of the present invention provides a kind of multiterminal
The current conversion station of flexible direct current power transmission system puts into method and apparatus online, and method includes by the first sending end current conversion station and confluence
Dc circuit breaker on circuit between busbar controls the first sending end current conversion station band when putting into the first sending end current conversion station
DC line is unlocked with STATCOM patterns and is run, the positive DC voltage UdP1 and negative DC of the outlet of the first sending end current conversion station
Voltage UdN1 is gradually stabilized to rated value；Then, the isolation switch of control dc circuit breaker both sides is closed；Secondly, first is sent
It holds the desired value of current conversion station DC voltage control to be switched to the measured value of operation current conversion station by rated value, makes dc circuit breaker both sides
Voltage difference be less than preset value；Finally, control dc circuit breaker is closed, and the first sending end current conversion station is cut by control DC voltage pattern
Control Active power mode is changed to, to which the first sending end current conversion station is put into Multi-end flexible direct current transmission system.The invention
The online input operation that third station can be carried out under the premise of it is not necessary that the current conversion station of operation is stopped transport, to improve multiterminal
The flexibility of flexible direct current power transmission system operation.
Description of the drawings
Fig. 1 is the structural schematic diagram for the Multi-end flexible direct current transmission system that the embodiment of the present invention is provided；
Fig. 2 is that the current conversion station for the Multi-end flexible direct current transmission system that the embodiment of the present invention is provided puts into the stream of method online
Journey schematic diagram；
Fig. 3 is that the current conversion station of Multi-end flexible direct current transmission system provided in an embodiment of the present invention puts into the structure of device online
Block diagram.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
It is the Multi-end flexible direct current transmission system that the embodiment of the present invention is provided please refer to Fig. 1 and Fig. 2, wherein Fig. 1
Structural schematic diagram, Fig. 2 is the online input side of current conversion station for the Multi-end flexible direct current transmission system that the embodiment of the present invention is provided
The flow diagram of method.
The Multi-end flexible direct current transmission system includes the first sending end current conversion station, the second sending end current conversion station and the receiving end change of current
It stands；The cathode output end of the first sending end current conversion station, the second sending end current conversion station cathode output end with it is described by
Hold the electrode input end connection of current conversion station, the cathode output end of the first sending end current conversion station, the second sending end current conversion station
Cathode output end is connect with the negative input of the receiving end current conversion station.The first sending end current conversion station and bus rod it
Between circuit on be provided with dc circuit breaker；The dc circuit breaker includes that positive DC circuit breaker Q F_N and negative DC are disconnected
Road device QF_P；The bus rod include the positive bus rod that is connected between the second sending end current conversion station and receiving end current conversion station with
Cathode bus rod.The cathode output end of the first sending end current conversion station is respectively arranged with positive isolation knife with cathode output end
Lock, cathode isolation switch；The both sides of the positive DC circuit breaker Q F_N and negative DC circuit breaker Q F_P be respectively arranged with every
From disconnecting link.
This approach includes the following steps：
S1 closes the direct current pole isolation switch of the first sending end current conversion station when receiving the first isolation switch close commands；
S2 controls the first sending end current conversion station band DC line STATCOM pattern solutions when receiving unlocking command
Lock so that the first sending end current conversion station is operated in control DC voltage pattern and using load voltage value V1 as DC voltage target
Value operation；Direct current pole isolation switch includes positive isolation switch and cathode isolation switch；
S3, when receiving the second isolation switch close commands, control is connected to bus rod and is changed with first sending end
The isolation switch of dc circuit breaker both sides between stream station closes；The dc circuit breaker includes positive DC breaker and cathode
Dc circuit breaker；The bus rod includes the positive bus rod being connected between the second sending end current conversion station and receiving end current conversion station
With cathode bus rod；
S4, when meeting online input enabled condition and receiving online input order, by the first sending end change of current
The DC voltage desired value stood is switched to the DC bus measurement voltage V2 of the second sending end current conversion station by V1；V2 is described the
The difference of the positive Current Voltage UdP2 and cathodal current voltage UdN2 of two sending end current conversion stations；
S5 works as satisfaction | (UdP1-UdN1)-V2 |<When △, controls the dc circuit breaker and be closed；△ is preset voltage
Difference threshold；
S6 controls the first sending end current conversion station by control direct current pressing mold after detecting that the dc circuit breaker is closed
Formula is switched to control Active power mode, and Multi-end flexible direct current transmission system is switched to three stations from the operation of two stations and runs, and makes described the
One sending end current conversion station puts into the receiving end current conversion station and the Multi-end flexible direct current transmission system where the second sending end current conversion station
System.
The above method can be applied in Nan'ao ± 160kV multiterminal flexible direct current engineerings, wherein green Australia's current conversion station send for first
It is the second sending end current conversion station to hold current conversion station, Taurus current conversion station, and modeling city current conversion station is receiving end current conversion station, and the method is used for green Australia
Current conversion station puts into Taurus current conversion station and modeling city current conversion station, and from two stations, operation is switched to three stations and runs.
The embodiment of the present invention by dc circuit breaker on the circuit between the first sending end current conversion station and bus rod,
When putting into the first sending end current conversion station, control the first sending end current conversion station band DC line is unlocked with STATCOM patterns to be run, the
The positive DC voltage UdP1 and negative DC voltage UdN1 of one sending end current conversion station outlet are gradually stabilized to rated value；Then, it controls
The isolation switch of dc circuit breaker both sides processed is closed；Secondly, by the desired value of the first sending end current conversion station DC voltage control by volume
Definite value is switched to the measured value of operation current conversion station, and the voltage difference of dc circuit breaker both sides is made to be less than preset value；Finally, control is straight
Flow breaker closing, the first sending end current conversion station by control DC voltage pattern switching to control Active power mode, thus by described the
One sending end current conversion station puts into Multi-end flexible direct current transmission system.The invention can be without stopping transport the current conversion station of operation
Under the premise of carry out the online input at third station and operate, to improve the flexibility that Multi-end flexible direct current transmission system is run.
In a kind of optional embodiment, the online input enabled condition is that the first sending end current conversion station is in fortune
Row state, the first sending end current conversion station direct current pole isolation switch be in close state, the dc circuit breaker both sides every
It is in from disconnecting link and closes state, the second sending end current conversion station and the receiving end current conversion station and be in two station normal release states.
In a kind of optional embodiment, the method further includes：
When detecting abnormal during the input of the first sending end current conversion station, it is latched the first sending end change of current
It stands, disconnects the AC circuit breaker of the dc circuit breaker and the first sending end current conversion station, to protect entire multiterminal flexible
DC transmission system.
In a kind of optional embodiment, V1 is 320 kilovolts, and V3 is 3 kilovolts.
Correspondingly, an embodiment of the present invention provides a kind of current conversion stations of Multi-end flexible direct current transmission system to put into dress online
It sets, the current conversion station for executing above-mentioned Multi-end flexible direct current transmission system puts into method online.As shown in figure 3, it is this hair
The current conversion station for the Multi-end flexible direct current transmission system that bright embodiment provides puts into the structure diagram of device online, including：
First disconnecting link control module 1, for when receiving the first isolation switch close commands, closing the first sending end change of current
The direct current pole isolation switch stood；
Lock module 2 is unblocked, for when receiving unlocking command, controlling the first sending end current conversion station band DC line
STATCOM patterns unlock so that the first sending end current conversion station is operated in control DC voltage pattern and is made with load voltage value V1
It is run for DC voltage desired value；Direct current pole isolation switch includes positive isolation switch and cathode isolation switch；
Second disconnecting link control module 3, for when receiving the second isolation switch close commands, it is female that control is connected to confluence
The isolation switch of dc circuit breaker both sides between line and the first sending end current conversion station closes；The dc circuit breaker includes just
Pole dc circuit breaker and negative DC breaker；The bus rod includes being connected to the second sending end current conversion station and receiving end current conversion station
Between positive bus rod and cathode bus rod；
Target voltage handover module 4, for when meeting online input enabled condition and receiving online input order,
The DC bus that the DC voltage desired value of the first sending end current conversion station is switched to the second sending end current conversion station by V1 is real
Survey voltage V2；V2 is the difference of the positive Current Voltage UdP2 and cathodal current voltage UdN2 of the second sending end current conversion station；
Breaker control module 5, for when satisfaction | (UdP1-UdN1)-V2 |<When △, controls the dc circuit breaker and close
It closes；△ is preset voltage difference threshold value；
Mode switch module 6, for after detecting that the dc circuit breaker is closed, controlling the first sending end current conversion station
By control DC voltage pattern switching to control Active power mode, from two stations, operation is switched to three stations to Multi-end flexible direct current transmission system
Operation, makes that the first sending end current conversion station puts into the receiving end current conversion station and the multiterminal where the second sending end current conversion station are soft
Property DC transmission system.
In a kind of optional embodiment, the online input enabled condition is that the first sending end current conversion station is in fortune
Row state, the first sending end current conversion station direct current pole isolation switch be in close state, the dc circuit breaker both sides every
It is in from disconnecting link and closes state, the second sending end current conversion station and the receiving end current conversion station and be in two station normal release states.
In a kind of optional embodiment, described device further includes：
Exception processing module, for when detecting abnormal during the input of the first sending end current conversion station, being latched
The first sending end current conversion station disconnects the AC circuit breaker of the dc circuit breaker and the first sending end current conversion station.
In a kind of optional embodiment, V1 is 320 kilovolts, and V3 is 3 kilovolts.
It should be noted that the current conversion station of the Multi-end flexible direct current transmission system of the embodiment of the present invention puts into device use online
All method and steps of method are put into online in the current conversion station for executing above-mentioned Multi-end flexible direct current transmission system, and the work of the two is former
Reason and advantageous effect correspond, thus repeat no more.
It should be noted that the apparatus embodiments described above are merely exemplary, wherein described be used as separating component
The unit of explanation may or may not be physically separated, and the component shown as unit can be or can also
It is not physical unit, you can be located at a place, or may be distributed over multiple network units.It can be according to actual
It needs that some or all of module therein is selected to achieve the purpose of the solution of this embodiment.
Compared with the prior art, the advantageous effect of the embodiment of the present invention is：An embodiment of the present invention provides a kind of multiterminal
The current conversion station of flexible direct current power transmission system puts into method and apparatus online, and method includes by the first sending end current conversion station and confluence
Dc circuit breaker on circuit between busbar controls the first sending end current conversion station band when putting into the first sending end current conversion station
DC line is unlocked with STATCOM patterns and is run, the positive DC voltage UdP1 and negative DC of the outlet of the first sending end current conversion station
Voltage UdN1 is gradually stabilized to rated value；Then, the isolation switch of control dc circuit breaker both sides is closed；Secondly, first is sent
It holds the desired value of current conversion station DC voltage control to be switched to the measured value of operation current conversion station by rated value, makes dc circuit breaker both sides
Voltage difference be less than preset value；Finally, control dc circuit breaker is closed, and the first sending end current conversion station is cut by control DC voltage pattern
Control Active power mode is changed to, to which the first sending end current conversion station is put into Multi-end flexible direct current transmission system.The invention
The online input operation that third station can be carried out under the premise of it is not necessary that the current conversion station of operation is stopped transport, to improve multiterminal
The flexibility of flexible direct current power transmission system operation.
It is the preferred embodiment of the present invention above, it is noted that for those skilled in the art,
Various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as this hair
Bright protection domain.
Claims (8)
1. a kind of current conversion station of Multi-end flexible direct current transmission system puts into method online, which is characterized in that including：
When receiving the first isolation switch close commands, the direct current pole isolation switch of the first sending end current conversion station is closed；
When receiving unlocking command, controls the first sending end current conversion station band DC line STATCOM patterns and unlock so that institute
The first sending end current conversion station is stated to be operated in control DC voltage pattern and run using load voltage value V1 as DC voltage desired value；Institute
It includes positive isolation switch and cathode isolation switch to state direct current pole isolation switch；
When receiving the second isolation switch close commands, control is connected between bus rod and the first sending end current conversion station
The isolation switch of dc circuit breaker both sides close；The dc circuit breaker includes positive DC breaker and negative DC open circuit
Device；The bus rod includes that the positive bus rod being connected between the second sending end current conversion station and receiving end current conversion station converges with cathode
Flow busbar；
When meeting online input enabled condition and receiving online input order, by the direct current of the first sending end current conversion station
Voltage-target is switched to the DC bus measurement voltage V2 of the second sending end current conversion station by V1；V2 is that second sending end is changed
Flow the difference of the positive Current Voltage UdP2 and cathodal current voltage UdN2 at station；
Work as satisfaction | (UdP1-UdN1)-V2 |<When △, controls the dc circuit breaker and be closed；△ is preset voltage difference threshold
Value；
After detecting that the dc circuit breaker is closed, control the first sending end current conversion station by control DC voltage pattern switching to
Active power mode is controlled, Multi-end flexible direct current transmission system is switched to three stations from the operation of two stations and runs, and first sending end is made to change
The receiving end current conversion station and the Multi-end flexible direct current transmission system where the second sending end current conversion station are put into stream station.
2. the current conversion station of Multi-end flexible direct current transmission system as described in claim 1 puts into method online, which is characterized in that institute
State the direct current pole that online input enabled condition is the first sending end current conversion station the first sending end current conversion station in operating status, described
Isolation switch be in close state, the dc circuit breaker both sides isolation switch be in close state, second sending end is changed
Stream station is in two station normal release states with the receiving end current conversion station.
3. the current conversion station of Multi-end flexible direct current transmission system as described in claim 1 puts into method online, the method is also wrapped
It includes：
When detecting abnormal during the input of the first sending end current conversion station, it is latched the first sending end current conversion station, is broken
Open the AC circuit breaker of the dc circuit breaker and the first sending end current conversion station.
4. the current conversion station of Multi-end flexible direct current transmission system as described in claim 1 puts into method online, V1 is 320 kilovolts,
V3 is 3 kilovolts.
5. a kind of current conversion station of Multi-end flexible direct current transmission system puts into device online, which is characterized in that including：
First disconnecting link control module, for when receiving the first isolation switch close commands, closing the first sending end current conversion station
Direct current pole isolation switch；
Lock module is unblocked, for when receiving unlocking command, controlling the first sending end current conversion station band DC line STATCOM
Pattern unlocks so that the first sending end current conversion station is operated in control DC voltage pattern and using load voltage value V1 as direct current
Press desired value operation；Direct current pole isolation switch includes positive isolation switch and cathode isolation switch；
Second disconnecting link control module, for when receiving the second isolation switch close commands, control be connected to bus rod with
The isolation switch of dc circuit breaker both sides between the first sending end current conversion station closes；The dc circuit breaker includes that anode is straight
Flow breaker and negative DC breaker；The bus rod includes being connected between the second sending end current conversion station and receiving end current conversion station
Positive bus rod and cathode bus rod；
Target voltage handover module, for when meeting online input enabled condition and receiving online input order, by institute
The DC voltage desired value for stating the first sending end current conversion station is switched to the DC bus actual measurement electricity of the second sending end current conversion station by V1
Press V2；V2 is the difference of the positive Current Voltage UdP2 and cathodal current voltage UdN2 of the second sending end current conversion station；
Breaker control module, for when satisfaction | (UdP1-UdN1)-V2 |<When △, controls the dc circuit breaker and be closed；△
For preset voltage difference threshold value；
Mode switch module, for after detecting that the dc circuit breaker is closed, controlling the first sending end current conversion station by controlling
For DC voltage pattern switching to control Active power mode, Multi-end flexible direct current transmission system is run from two stations is switched to three stations fortune
Row makes the first sending end current conversion station put into the receiving end current conversion station and the multiterminal flexibility where the second sending end current conversion station
DC transmission system.
6. the current conversion station of Multi-end flexible direct current transmission system as claimed in claim 5 puts into device online, which is characterized in that institute
State the direct current pole that online input enabled condition is the first sending end current conversion station the first sending end current conversion station in operating status, described
Isolation switch be in close state, the dc circuit breaker both sides isolation switch be in close state, second sending end is changed
Stream station is in two station normal release states with the receiving end current conversion station.
7. the current conversion station of Multi-end flexible direct current transmission system as claimed in claim 5 puts into device online, described device is also wrapped
It includes：
Exception processing module, for when detecting abnormal during the input of the first sending end current conversion station, described in locking
First sending end current conversion station disconnects the AC circuit breaker of the dc circuit breaker and the first sending end current conversion station.
8. the current conversion station of Multi-end flexible direct current transmission system as claimed in claim 5 puts into device online, V1 is 320 kilovolts,
V3 is 3 kilovolts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810249220.6A CN108400610A (en) | 2018-03-23 | 2018-03-23 | The current conversion station of Multi-end flexible direct current transmission system puts into method and apparatus online |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810249220.6A CN108400610A (en) | 2018-03-23 | 2018-03-23 | The current conversion station of Multi-end flexible direct current transmission system puts into method and apparatus online |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556794A (en) * | 2019-09-12 | 2019-12-10 | 中国南方电网有限责任公司超高压输电公司柳州局 | Bus bar protection configuration method of multi-end hybrid direct current system |
| CN110635500A (en) * | 2019-08-19 | 2019-12-31 | 南方电网科学研究院有限责任公司 | Control method and device for power reconfiguration of direct-current power transmission system |
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