CN106410837A - Bipolar flexible direct-current power transmission system and converter station thereof - Google Patents
Bipolar flexible direct-current power transmission system and converter station thereof Download PDFInfo
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- CN106410837A CN106410837A CN201611025015.9A CN201611025015A CN106410837A CN 106410837 A CN106410837 A CN 106410837A CN 201611025015 A CN201611025015 A CN 201611025015A CN 106410837 A CN106410837 A CN 106410837A
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- current
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- current conversion
- inverter
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
- H02M1/348—Passive dissipative snubbers
-
- 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
The invention provides a bipolar flexible direct-current power transmission system and a converter station thereof and relates to the electric power technology field. When a direct current side of the bipolar flexible direct-current power transmission system generates a fault, a short circuit current can be restrained. The converter station used for the bipolar flexible direct-current power transmission system comprises a positive polarity conversion portion and a negative polarity conversion portion. The positive polarity conversion portion comprises a first converter. The negative polarity conversion portion comprises a second converter. The converter station comprises a current limiting module. The current limiting module comprises an electric reactor. The electric reactor is connected in series to a neutral bus.
Description
Technical field
The present invention relates to technical field of electric power, more particularly, to a kind of bipolar flexible direct current transmission system and its current conversion station.
Background technology
Technology of HVDC based Voltage Source Converter is a kind of VSC-HVDC technology, and rational control ＆ protection strategy determines flexible straight
Stream transmission system safe and stable operation.Its flexible Application performance makes it grid-connected and lonely in urban distribution network interconnection, clean energy resource
The island field such as power has broad application prospects.
In order to realize the requirement of high-capacity power conveying, need to increase submodule quantity to improve its electric pressure, but mistake
Multi-tool block cascades, and makes valve control equipment control difficulty to increase, therefore adopts dipolar configuration form, is reducing single convertor unit
While module-cascade number, reaching same through-put power becomes a kind of feasible selection.
Dc-side short-circuit fault be current bipolar flexible HVDC Transmission Technology faced by one of subject matter.When bipolar soft
Property DC transmission system DC side when breaking down, due to its special topological structure, very big short circuit current will be produced.Should
Short circuit current flows through inverter so that the current stress of inverter increases, or even causes the damage of inverter, simultaneously also serious prestige
Coerce the safety of relevant device in faulty line.
Content of the invention
Embodiments of the invention provide a kind of bipolar flexible direct current transmission system and its current conversion station, and bipolar flexible can be suppressed straight
The short circuit current that stream transmission system DC side produces when breaking down.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
On the one hand, a kind of current conversion station for bipolar flexible direct current transmission system is provided, including positive polarity change of current part and
Negative polarity change of current part；Described positive polarity change of current part includes the first inverter；Described negative polarity change of current part includes second and changes
Stream device；Described current conversion station also includes current limliting module；Described current limliting module includes reactor, and described reactor is connected on neutral bus
On.
Preferably, described current limliting module also includes a spark gap；One end of described spark gap is with described neutral bus even
Connect, the other end is grounded；Wherein, described spark gap is arranged between the low-voltage end of inverter and described reactor.
Preferably, described current limliting module includes two spark gaps；One end and described first of one of described spark gap
The low-pressure end of inverter connects, and the other end is grounded；One end of another described spark gap and the low-pressure end of described second inverter
Connect, the other end is grounded.
Preferably, described reactor includes at least one sub- reactor；Wherein, when described reactor includes many sub- reactance
During device, many sub- reactors are arranged in series and/or parallel.
Based on above-mentioned preferably, described first inverter and described second inverter all include multiple valve modules；Each valve
Assembly all includes insulated gate bipolar transistor converter valve.
On the other hand, provide a kind of bipolar flexible direct current transmission system, including sending end current conversion station and receiving end current conversion station；
Described sending end current conversion station and/or described receiving end current conversion station are above-mentioned current conversion station.
It is further preferred that described sending end current conversion station and described receiving end current conversion station are described current conversion station；Described send
Electric end current conversion station turns DC converter station for exchange；Described receiving end current conversion station delivers stream current conversion station for direct current.
It is further preferred that the exchange end of the first inverter and the second inverter is connected with converter power transformer；Described power transmission
First inverter high-pressure side of positive polarity change of current part and positive polarity change of current part in described receiving end current conversion station in the current conversion station of end
Described first inverter high-pressure side, the second inverter high-pressure side of negative polarity change of current part and institute in described sending end current conversion station
The described second inverter high-pressure side stating negative polarity change of current part in receiving end current conversion station passes through bipolarity high-voltage dc transmission electric wire
Connect.
The present invention provides a kind of bipolar flexible direct current transmission system and its current conversion station, includes the current limliting of reactor by setting
Module, when the DC side of described current conversion station breaks down and is short-circuited, the electric current flowing through reactor increases suddenly, and according to electricity
The characteristic of anti-device, it can produce reverse current to limit the electric current of unexpected increase, thus can suppress described current conversion station DC side
Short circuit current is it is ensured that the safety of the inverter in current conversion station and the relevant device on circuit.On this basis, only pass through
One current limliting module reduces positive polarity change of current part and the short circuit current of negative polarity change of current Partial DC side simultaneously, reduces described
The cost of current conversion station.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of topology signal of current conversion station for bipolar flexible direct current transmission system provided in an embodiment of the present invention
Figure；
Fig. 2 be provided in an embodiment of the present invention a kind of for current limliting module in the current conversion station of bipolar flexible direct current transmission system
Topological schematic diagram one；
Fig. 3 be provided in an embodiment of the present invention a kind of for current limliting module in the current conversion station of bipolar flexible direct current transmission system
Topological schematic diagram two；
Fig. 4 be provided in an embodiment of the present invention a kind of for current limliting module in the current conversion station of bipolar flexible direct current transmission system
Topological schematic diagram three；
Fig. 5 be provided in an embodiment of the present invention a kind of for current limliting module in the current conversion station of bipolar flexible direct current transmission system
Topological schematic diagram four；
Fig. 6 be provided in an embodiment of the present invention a kind of for current limliting module in the current conversion station of bipolar flexible direct current transmission system
Topological schematic diagram five；
Fig. 7 is a kind of topological schematic diagram of bipolar flexible direct current transmission system provided in an embodiment of the present invention.
Brief description：
01- sending end current conversion station；02- receiving end current conversion station；100- positive polarity change of current part；110- first inverter；
111- the first inverter low-pressure end；112- the first inverter high-pressure side；200- negative polarity change of current part；210- second inverter；
211- the second inverter low-pressure end；212- the second inverter high-pressure side；300- current limliting module；310- reactor；The sub- reactance of 311-
Device；320- spark gap；400- neutral bus；500- commutating reactor；600- converter power transformer.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the present invention provides a kind of current conversion station for bipolar flexible direct current transmission system, including positive polarity change of current portion
Divide 100 and negative polarity change of current part 200；Positive polarity change of current part 100 includes the first inverter 110；Negative polarity change of current part 200
Including the second inverter 210；Described current conversion station also includes current limliting module 300；Current limliting module 300 includes reactor 310, reactor
310 are connected on neutral bus 400.
Wherein, current limliting module 300 is used for when positive polarity change of current part 100 or the appearance of negative polarity change of current part 200 DC side
Fault, when causing described current conversion station dc-side short-circuit, reduces short circuit current.
It should be noted that the first, the first inverter 110 and the second inverter 210 can be used for being converted to directly alternating current
Stream electricity is it can also be used to be converted to alternating current by unidirectional current.
No matter the first inverter 110 and the second inverter 210 are used for for alternating current being converted to unidirectional current, or by unidirectional current
Be converted to alternating current, the first inverter high-pressure side 112 and the second inverter high-pressure side 212 are all that connection positive high voltage direct current is defeated respectively
Electric wire and negative high voltage DC transmission line.
Second, the first inverter 110 and the internal specific structure of the second inverter 210 are not defined, as long as according to
Need, alternating current can be converted to unidirectional current, or unidirectional current is converted to alternating current.
3rd, the design parameter of reactor 310 can be set according to the concrete current conversion station that it is applied, as long as ensureing
When there is dc-side short-circuit, the device in current conversion station is not destroyed.
The embodiment of the present invention provides a kind of current conversion station, includes the current limliting module 300 of reactor 310 by setting, when described
The DC side of current conversion station breaks down when being short-circuited, and the electric current flowing through reactor 310 increases suddenly, and according to reactor 310
Characteristic, it can produce reverse current to limit the electric current of unexpected increase, thus can suppress the short circuit of described current conversion station DC side
Electric current is it is ensured that the safety of the inverter in current conversion station and the relevant device on circuit.On this basis, only pass through one
Current limliting module 300 reduces positive polarity change of current part 100 and the short circuit current of negative polarity change of current part 200 DC side simultaneously, reduces
The cost of described current conversion station.
In view of when short trouble in the DC side of positive polarity change of current part 100, the first inverter high-pressure side 112 with
First inverter low-pressure end 111 connects, and leads to the voltage spikes of the first inverter low-pressure end 111；Or, when negative polarity change of current portion
When dividing 200 DC side short trouble, the second inverter high-pressure side 212 is connected with the second inverter low-pressure end 211, leads to
The voltage spikes of the second inverter low-pressure end 211.In the case, in order to avoid the device in described current conversion station is destroyed, need
Will described current conversion station the first inverter low-pressure end 111 and the second inverter low-pressure end 211 insulation against ground level higher, thus leading
Cause the first inverter 110 and the raising of the second inverter 210 cost.Based on this it is preferred that as shown in Fig. 2 current limliting module 300
Also include a spark gap 320；One end of spark gap 320 is connected with neutral bus 400, and the other end is grounded；Wherein, spark gap
Between 320 low-voltage ends being arranged on inverter and reactor 310.
It should be noted that it will be recognized by those skilled in the art that spark gap 320 can reduce voltage and electricity in circuit
Stream, protects electric equipment from the harm of high transient overvoltage.
In the embodiment of the present invention, also include spark gap 320 by making current limliting module 300, in the DC side of described current conversion station
Be short-circuited fault, and when the voltage of the voltage of the first inverter low-pressure end 111 or the second inverter low-pressure end 211 rise to lightning-arrest
During the protection voltage levvl of device 320, spark gap 320 works, and so that the portion of electrical current in short-circuit loop is flowed into greatly by spark gap 320
Ground, thus reduce the current stress of reactor 310 it is also possible to raising the first inverter low-pressure end 111 and the second inverter are low
The insulation against ground level of pressure side 211, and then can reduce to the first inverter low-pressure end 111 and the second inverter low-pressure end 211
The requirement of insulation against ground level.
Or it is preferred that as shown in figure 3, described current limliting module 300 includes two spark gaps 320；One of spark gap
320 one end is connected with the first inverter low-pressure end 111, and the other end is grounded；One end of another spark gap 320 and second change of current
Device low-pressure end 211 connects, and the other end is grounded.
The embodiment of the present invention connects one in the first inverter low-pressure end 111 and the second inverter low-pressure end 211 respectively and keeps away
Thunder device 320, can preferably reduce the first inverter low-pressure end 111 and the insulation against ground level of the second inverter low-pressure end 211
And the current stress of reactor 310.
Relatively using dc circuit breaker and its relevant device of bigger connecting-disconnecting function, due to high-tension electricity, jumbo direct current
Chopper, still in the development stage, temporarily cannot directly apply in engineering, and its cost of manufacture is high, therefore limit its
Practical application in DC engineering；Or, relatively using traditional restrictor apparatus, but traditional restrictor apparatus are occurring
Open-circuit line, the trend distribution of impact system and stability is needed after fault；Or relatively using fast based on current-carrying isolator
Fast fault current limiter, does not need open-circuit line after breaking down, fault terminates rear electric current and can continue circulation from by-pass switch,
Trend distribution under the normal operation of the system that do not affect, but its equipment is complicated, and manufacturing cost is higher.The embodiment of the present invention is due to limit
Flow module 300 includes up to reactor 310 and spark gap 320 so that the topology of described current conversion station does not contain high-power electric and electronic
Device, cost relative moderate, small volume, realize simple and excellent performance, thus be easy to practical application and promote.
Because metal oxide arrester (Metal Oxide Arrester, MOA) has, action response is fast, it is multiple to be resistant to
The advantages of lightning surge or switching overvoltage, energy absorption capability are big, resistance to pollution performance is good, it is preferred, therefore, that spark gap
320 is metal oxide arrester.
Preferably, reactor 310 includes at least one sub- reactor 311；Wherein, when reactor 310 includes many height electricity
During anti-device 311, how sub- reactor 311 is arranged in series and/or parallel.
Included as a example two sub- reactors 311 by reactor 310, as shown in figure 4, two sub- reactance in reactor 310
Device 311 is connected in series.Or, as shown in figure 5, two in reactor 310 sub- reactors 311 are connected in parallel.
Included as a example three sub- reactors 311 by reactor 310, as shown in fig. 6, two of which electricity in reactor 310
Anti- device 311 is connected in parallel, and is connected in series with another sub- reactor 311.
It should be noted that arrange many sub- reactors 311 by the way of string and/or parallel connection there are a variety of feelings
Condition, Fig. 4-6 simply sets forth one of three kinds of set-up modes situation.
The embodiment of the present invention using many sub- reactors 311 go here and there and/or parallel combination by the way of limiting short-circuit current, permissible
Reduce the parameter of every sub- reactor 311, thus can reduces cost.
It is out in view of insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT)
Logical, turn off all controlled wholly-controled device, IGBT converter valve is more flexible to the control of transmission system, controllable reactive power and
Make the reactive power compensator that current conversion station need not be huge, and the switching frequency of IGBT converter valve is of a relatively high, makes the defeated of current conversion station
Go out that voltage harmonic amount is less, so that the capacity of filter that the current conversion station of application IGBT converter valve is installed greatly reduces.Base
In this it is preferred that the first inverter 110 and the second inverter 210 all include multiple valve modules；Each valve module all includes insulating
Grid bipolar transistor converter valve.
The embodiment of the present invention also provides a kind of bipolar flexible direct current transmission system, as shown in fig. 7, comprises sending end current conversion station
01 and receiving end current conversion station 02；Sending end current conversion station 01 and/or receiving end current conversion station 02 are the current conversion station of aforementioned any embodiment.
It should be noted that Fig. 7 is aforementioned any embodiment with sending end current conversion station 01 and receiving end current conversion station 02
Current conversion station is illustrated.
The embodiment of the present invention passes through the limit that setting in the current conversion station of bipolar flexible direct current transmission system includes reactor 310
Flow module 300, when the DC side of described current conversion station breaks down and is short-circuited, the electric current flowing through reactor 310 increases suddenly,
And the characteristic according to reactor 310, it can produce reverse current to limit the electric current of unexpected increase, thus can suppress the described change of current
Stand DC side short circuit current it is ensured that the safety of the inverter in current conversion station and the relevant device on circuit.In this base
On plinth, only positive polarity change of current part 100 and negative polarity change of current part 200 DC side are reduced by a current limliting module 300 simultaneously
Short circuit current, reduce the cost of described current conversion station.
It is further preferred that as shown in fig. 7, sending end current conversion station 01 and receiving end current conversion station 02 are the embodiment of the present invention
The current conversion station of aforementioned any embodiment；Sending end current conversion station 01 turns DC converter station for exchange；Receiving end current conversion station 02 is direct current
Deliver stream current conversion station.
Wherein, when described current conversion station is sending end current conversion station 01, the first inverter 110 and the second inverter 210 are used for
Alternating current is changed into the unidirectional current that multi-line power transmission ability is strong, loss is little；When described current conversion station is sending end current conversion station 01, first
Inverter 110 and the second inverter 210 be used for by the DC conversion receiving be can large area transmission of electricity alternating current.
The embodiment of the present invention makes the sending end current conversion station 01 of described bipolar flexible transmission system and receiving end current conversion station 02 equal
Including current limliting module 300 it is ensured that when the DC side of described bipolar flexible transmission system breaks down and is short-circuited, power transmission
Short circuit current in the circuit of end current conversion station 01 and receiving end current conversion station 02 is all suppressed, thus the components and parts in protection circuit are not
Destroyed.
It is further preferred that as shown in fig. 7, the first inverter 110 and the second inverter 210 exchange end and change of current transformation
Device 600 connects；First inverter high-pressure side 112 of positive polarity change of current part 100 and the receiving end change of current in sending end current conversion station 01
Stand the first inverter high-pressure side 112 of positive polarity change of current part 100 in 02, negative polarity change of current part in sending end current conversion station 01
200 the second inverter high-pressure side 212 and the second inverter high-pressure side of negative polarity change of current part 200 in receiving end current conversion station 02
212 pass through bipolarity high-voltage dc transmission electric wire connects.
Wherein, described bipolar flexible direct current transmission system also includes commutating reactor 500, converter power transformer 600, Yi Jijiao
Streaming system.
Commutating reactor 500 is connected with the exchange end of the first inverter 110, the second inverter 210, in order to reduce electric power half
Impact to AC system waveform during conductor device commutation, and the short circuit current of limiting AC side.
Converter power transformer 600 is passed through commutating reactor 500 and is connected with the end that exchanges of the first inverter 110, the second inverter 210
Connect.
It should be noted that the first inverter 110 is connected with converter power transformer 600 with the end that exchanges of the second inverter 210,
I.e. the first inverter 110 of sending end current conversion station 01 and receiving end current conversion station 02 and the second inverter 210 exchange end all with change
Convertor transformer 600 connects.
The embodiment of the present invention is passed through for the first inverter 110 and the second inverter 210 to exchange end and converter power transformer 600
Connect, on the one hand, the connection between achievable AC network and direct current network；On the other hand, it is possible to achieve the conversion of voltage, make
The AC voltage of sending end current conversion station 01 DC voltage or receiving end current conversion station 02 meets its rated voltage and allowable voltage
Skew.On this basis, sending end current conversion station 01 and receiving end current conversion station 02 are connected by bipolarity high-voltage dc transmission electric wire, can
Improve line transmission ability, reduce the power consumption during line transmission.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (8)
1. a kind of current conversion station for bipolar flexible direct current transmission system is it is characterised in that including positive polarity change of current part and bearing
Polarity change of current part；Described positive polarity change of current part includes the first inverter；Described negative polarity change of current part includes second change of current
Device；
Described current conversion station also includes current limliting module；Described current limliting module includes reactor, and described reactor is connected on neutral bus
On.
2. current conversion station according to claim 1 is it is characterised in that described current limliting module also includes a spark gap；Described
One end of spark gap is connected with described neutral bus, and the other end is grounded；Wherein, described spark gap is arranged on the low-voltage of inverter
Between end and described reactor.
3. current conversion station according to claim 1 is it is characterised in that described current limliting module includes two spark gaps；Wherein one
One end of individual described spark gap is connected with the low-pressure end of described first inverter, and the other end is grounded；Another described spark gap
One end is connected with the low-pressure end of described second inverter, and the other end is grounded.
4. current conversion station according to claim 1 is it is characterised in that described reactor includes at least one sub- reactor；Its
In, when described reactor includes many sub- reactors, many sub- reactors are arranged in series and/or parallel.
5. the current conversion station according to any one of claim 1-4 is it is characterised in that described first inverter and described second changes
Stream device all includes multiple valve modules；
Each valve module all includes insulated gate bipolar transistor converter valve.
6. a kind of bipolar flexible direct current transmission system is it is characterised in that include sending end current conversion station and receiving end current conversion station；
Described sending end current conversion station and/or described receiving end current conversion station are the current conversion station described in any one of claim 1-5.
7. transmission system according to claim 6 is it is characterised in that described sending end current conversion station and the described receiving end change of current
Station is described current conversion station；
Described sending end current conversion station turns DC converter station for exchange；Described receiving end current conversion station delivers stream current conversion station for direct current.
8. transmission system according to claim 7 it is characterised in that the exchange end of the first inverter and the second inverter with
Converter power transformer connects；
In first inverter high-pressure side of positive polarity change of current part and described receiving end current conversion station in described sending end current conversion station just
Second change of current of negative polarity change of current part in the described first inverter high-pressure side of polarity change of current part, described sending end current conversion station
Device high-pressure side is high by bipolarity with the described second inverter high-pressure side of negative polarity change of current part in described receiving end current conversion station
Pressure DC transmission line connects.
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| CN201611025015.9A CN106410837A (en) | 2016-11-17 | 2016-11-17 | Bipolar flexible direct-current power transmission system and converter station thereof |
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| CN201611025015.9A CN106410837A (en) | 2016-11-17 | 2016-11-17 | Bipolar flexible direct-current power transmission system and converter station thereof |
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| CN106877296A (en) * | 2017-03-10 | 2017-06-20 | 国网内蒙古东部电力有限公司通辽供电公司 | Current conversion station integration protection method based on broad sense no-load voltage ratio |
| CN111541265A (en) * | 2020-06-11 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Converter station debugging method adopting single-station bipolar back-to-back operation mode |
| CN111541265B (en) * | 2020-06-11 | 2022-04-12 | 南方电网科学研究院有限责任公司 | Converter station debugging method adopting single-station bipolar back-to-back operation mode |
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