EP3695504A1 - Energieübertragung über eine bipolare hochspannungs-gleichstrom-übertragungsstrecke - Google Patents
Energieübertragung über eine bipolare hochspannungs-gleichstrom-übertragungsstreckeInfo
- Publication number
- EP3695504A1 EP3695504A1 EP17816485.1A EP17816485A EP3695504A1 EP 3695504 A1 EP3695504 A1 EP 3695504A1 EP 17816485 A EP17816485 A EP 17816485A EP 3695504 A1 EP3695504 A1 EP 3695504A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- power
- station
- converters
- active power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
- H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
- H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/75—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/757—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/7575—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only for high voltage direct transmission link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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 high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links
-
- 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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
-
- 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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
- H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
- H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/75—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/77—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means arranged for operation in parallel
-
- 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
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
- H02P2201/13—DC-link of current link type, e.g. typically for thyristor bridges, having an inductor in series with rectifier
-
- 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]
Definitions
- the invention relates to a converter station for energy transmission via a bipolar high-voltage DC transmission path and a method for their operation.
- HVDC high voltage direct current
- a monopolar HVDC link has only one high-voltage line, at which a high voltage is applied to a ground potential.
- a bipolar HVDC line has two high-voltage lines, where at one
- HVDC track High voltage line against the earth potential negative high voltage is applied.
- the parts of an HVDC track which are assigned to the same voltage polarity are referred to below as poles of the HVDC track.
- a monopolar HVDC link thus has one pole, a bipolar HVDC link has two poles.
- a converter station is arranged between the AC grid and one end of the HVDC link, in which the
- Commutated Converter is performed on a thyristor basis.
- Valve units each having a thyristor or more serially connected thyristors.
- the continuous current flow is maintained by inductors.
- Valve unit by zero, so that the flow of current through this valve unit is already extinguished before it is ignited in the current commutation detaching valve unit, the extinguished valve unit must be re-ignited and one speaks then of a gapping operation.
- This gap operation causes high losses and claimed the power converters very strong, which is why it is best avoided during operation.
- line-commutated converters are operated with a minimum current flow, for example, about 5 to 10 percent of the rated current and in which the
- one of the two power converters is operated in a coordinated manner on a plurality of converter stations connected to the HVDC link as a rectifier, which has a
- Converter output transfers to the AC grid.
- the transmitted from a converter station
- Station active power is in this case the difference of the converter active power of their two power converters. As a result, the station active power can be smaller than the
- Power converter can be made so that the active power jump can be reduced, although both power converters with
- the invention is based on the object
- Converter station with two line-commutated converters for energy transfer via a bipolar high-voltage DC transmission line are in a first
- one of the power converters is as a rectifier to a
- Power converters are operated either as rectifiers or as inverters on the AC mains. In both operating modes, a station active power exchanged between the converter station and the AC network is determined by active power specifications for converter performance
- the invention thus sees two different operating modes for operating a converter station with two
- the power converters are operated monopolar in an anti-parallel circuit, that is, at the same pole of the HVDC link.
- one of the power converters is used as a rectifier on the
- both converters are operated either as a rectifier or as an inverter to the AC mains.
- the station active power that the converter station exchanges with the AC grid is the difference in power converter efficiencies of the two
- the station active power can be made smaller than the converter active power of each converter, and in particular smaller than the minimum transmission power of each converter, even if both
- a vanishing station active power can be set if both converters are operated with the same converter active power.
- the first operating mode is therefore particularly suitable for switching on and off the
- the station active power and the power transmitted via the HVDC link can be small in the case of high converter efficiencies
- the first operating mode is also suitable for tests with high converter efficiencies within the framework of a
- AC systems and / or the HVDC line are not yet designed or available for high performance.
- the station active power is that of the converter station with the AC mains
- the converter station is controlled by active power requirements for the converter active power, which is between the converters and the
- the active power specifications for the two power converters usually differ from each other, but in certain situations can also match, in particular to set a vanishing station active power, for example, to the converter station without a real power jump on or off.
- both converters are usually operated with matching active power specifications, so that each converter active power half the size of the
- the invention thus enables in addition to the conventional
- An embodiment of the invention provides that, in an operating mode change between the two operating modes, one of the two power converters is first turned off and at the same time the power converter active power of the other
- This embodiment of the invention makes it possible to avoid an active power jump in the station active power caused by a change in the operating mode.
- a further embodiment of the invention provides that a threshold value for the station active power is specified and the converter station for station effective powers below the threshold value is operated in the first operating mode. Above the threshold is the
- This embodiment of the invention takes into account that the first mode of operation is particularly suitable for small stations effective, since in this
- Stationswirk must be set, which is smaller than a minimum transmission power of the converter, which serves to avoid a gapping operation of the power converter.
- the threshold is, for example, equal to the sum of the minimum transmission power of the power converter
- stations active power when switching the converter station in the first operating mode by continuously changing the active power settings of a Einschaltwirk oriental increases and / or when switching off the converter station in the first mode by continuously changing the
- the turn-on active power and / or the turn-off active power can in particular be zero.
- Embodiments of the invention enable a gentle Switching on and / or switching off the converter station without active power jumps or with respect to the conventional operation reduced active power jumps.
- a further embodiment of the invention provides that the converter station is operated for a change of a flow direction of the station active power in the first operating mode, wherein the station active power is changed by continuously changing the active power specifications.
- This embodiment of the invention causes the station active power is changed continuously when changing their flow direction and active power jumps in the station active power can be avoided.
- Power transmission via a high-voltage bipolar DC transmission link comprises two line-commutated converters each selectively operable as a rectifier or as an inverter on an AC mains and electrically connectable to each of the two poles of the high-voltage DC link, and a control unit configured is, one taken from the converter station from the AC mains
- a converter station according to the invention makes it possible to carry out the method according to the invention with the advantages mentioned above. Compared to a conventional one
- Converter station with line-commutated converters are only a circuit that allows the anti-parallelism of the two converters, and a control unit that controls the invention
- Converter output of the antiparallel switched converter is set up needed.
- the circuit may optionally already existing switching devices a converter station, where necessary, an isolation level of this
- the device of the control unit can be any type of circuitry.
- the device of the control unit can be any type of circuitry.
- the invention may therefore also be used to upgrade existing bipolar converter stations with line-commutated converters.
- Converter station provides that each power converter with one pole of the high-voltage DC transmission link is directly connected to the other pole and a Polwendeschalter. This embodiment of the invention is
- a further embodiment of the invention provides that the AC network is three-phase.
- each power converter may, for example twelve in one of two
- each valve unit may in particular comprise at least one thyristor.
- each power converter can be connected by a transformer unit with the AC power, the one for each phase of the AC power supply
- FIG. 1 shows a circuit diagram of a converter station according to the prior art
- FIG. 2 shows schematically two converter stations, which are connected via an HVDC route
- FIG 3 shows schematically three converter stations, which are connected via an HVDC link.
- the converter station 1 shows a circuit diagram of a converter station 1 according to the prior art for energy transmission via a bipolar HVDC path 30.
- each as an optional Rectifier or as an inverter on a three-phase AC mains 27, 28, 29 are operable.
- Each power converter 4, 5 has twelve valve units 7, which are arranged in a twelve-pulse bridge circuit 26 consisting of two six-pulse bridge circuits 26.1, 26.2.
- Each valve unit 7 has one or more thyristors connected in series or in parallel.
- a surge arrester 9 is connected in parallel.
- Each power converter 4, 5 is connected by a
- each transformer unit 11 has a primary winding 13, a first secondary winding 15 and a second secondary winding 17 for each phase of the AC network 27.
- the primary windings 11 of each transformer unit 11 are connected to each other by a star connection
- the first secondary windings 15 are connected to each other by a delta connection
- the second secondary windings 17 are connected to each other by a star connection.
- Each winding end of each first secondary winding 15 is connected to one of six valve units 7
- Power converters 4, 5 formed second six-pulse bridge circuit 26.2 connected.
- a first power converter 4 is connected to a first pole 21 of the HVDC track 30.
- the second six-pulse bridge circuit 26.2 of the first power converter 4 is connected to the first pole 21 of the HVDC track 30.
- Power converter 5 is connected to the second pole 23 of the HVDC track 30. For this, the second six-pulse
- FIG. 2 schematically shows two converter stations 1, 2 which are connected to one another via a HVDC link 30 on the DC side.
- AC side is a first
- Converter station 1 is connected to a first AC mains 27, and the second converter station 2 is connected to a second AC network 28.
- the HVDC path 30 is formed bipolar with a first pole 21 and a second pole 23 and high voltage lines 32, 34 between the two converter stations 1, 2.
- Each converter station 1, 2 is like that in FIG. 1
- Pole connection line 36 of each converter station 1, 2 is also via a reconfiguration switch 40 with the
- the power converter connection lines 25 of the converter stations 1, 2 are connected via a
- Converter station 1, 2 has a control unit 46, through which the valve units 7 of their power converters 4, 5 are driven. Each converter station 1, 2 exchanges with the
- the station effective power Pi of the converter station i results from the
- the direction of each active power flow is shown in FIG. 2 by an arrow.
- Converter stations 1, 2 operated in the first mode of operation of the method according to the invention.
- the two power converters 4, 5 of each converter station 1, 2 are connected in an anti-parallel connection with the first pole 21 of the HVDC line 30, wherein the first converter 4 of each converter station 1, 2 is connected directly to the first pole 21, while the second Power converter 5 is connected by a Polwendeschalter 38 with the first pole 21.
- the converter stations 1, 2 are thus each monopolar in the first operating mode, that is, only at one pole 21 of the HVDC line 30, operated.
- One of the power converters 4, 5 of each converter station 1, 2 is operated as a rectifier, the other power converter 4,
- the first power converter 4 of a first power converter station 1 as an inverter
- the second power converter 5 of the first power converter station 1 is operated as a rectifier, that is, it takes the converter active power P12 from the first AC power grid 27.
- the first power converter 4 of the second power converter station 2 is operated as a rectifier, that is, it takes the converter active power P21 from the second
- the second power converter 5 of the second power converter station 2 is operated as an inverter, that is, it transmits the power converter active power P22 in the second AC power network 28.
- Converter station 1, 2 controlled by active power specifications for the converter power Pli, P12, P21, P22.
- FIG. 2 also shows electrical currents II to 18 and their directions represented by arrows, which are each indicated by a first high-voltage line 32, which
- FIG. 3 schematically shows three converter stations 1, 2, 3, which are connected to one another on the DC side via an HVDC line 30.
- AC side is a first
- Converter station 1 connected to a first AC mains 27, a second converter station 2 is connected to a second AC network 28, and the third
- Converter station 3 is a third
- the HVDC path 30 is formed bipolar with a first pole 21 and a second pole 23.
- Each converter station 1, 2, 3 is designed like the converter station 1 shown in FIG. 1, wherein each of the two converters 4, 5 of each converter station 1, 2,
- each of the two poles 21, 23 of the HVDC track 30 is connectable.
- the outputs, connected in each case to a pole 21, 23, of each converter station 1, 2, 3 are connected via a pole connecting line 36 and two
- the pole connection line 36 of each converter station 1, 2, 3 is also connected via a reconfiguration switch 40 to the converter connection line 25 of the converter station 1, 2, 3 connectable and has between its connection to the reconfiguration switch 40 and each power converter 4, 5 of the converter station 1, 2, 3 an interruption switch 42.
- Converter station 1, 2, 3 has a control unit 46, through which the valve units 7 of their power converters 4, 5 are driven.
- Each converter station 1, 2, 3 exchanges with the
- the station effective power Pi of the converter station i results from the
- the direction of each active power flow is again shown by an arrow.
- a first converter station 1 is in the first
- Converter station 1 in an anti-parallel connection to the same first pole 21 of the HVDC track 30, wherein the first converter 4 of the first converter station 1 is directly connected to this first pole 21, while the second converter 5 of the first converter station 1 by a Polwendeschalter 38 with the first pole 21 is connected.
- the first power converter 4 is operated as an inverter, that is, it transmits the
- the second power converter 5 is operated as a rectifier, that is, he takes the
- Converter station 3 are each operated in a conventional second operating mode, that is, the two
- Power converters 4, 5 of each of these converter stations 2, 3 are connected to different poles 21, 23 of the HVDC track 30 and both power converters 4, 5 are operated either as a rectifier or as an inverter.
- Converter station 3 are operated as inverters, which each transmit a converter active power P31 and P32 into the third AC network 29.
- the station effective power PI, P2, P3 each
- Converter station 1, 2 is controlled by means of the control unit 46 of this converter station 1, 2 by active power specifications for the converter active power Pli, P12, P21, P22, P31, P32 their power converters 4, 5.
- the station active power PI, P2, P3 of a converter station 1, 2, 3 in the first operating mode is the difference between the values Power converter active power Pli to P32 of the two power converters 4, 5 of the converter station 1, 2, 3. Therefore, the station active power PI, P2, P3 in the first
- each converter 4, 5 Operating mode smaller than the power converter active power Pli to P32 each converter 4, 5 and in particular less than a minimum transmission power, by which a gapping operation of the power converter 4, 5 is prevented, be made, even if both converters 4, 5 are operated with at least their minimum transmission power ,
- a vanishing station effective power PI, P2, P3 a converter station 1, 2, 3 can be adjusted by both converters 4, 5 of the converter station 1, 2, 3 with
- the first operating mode is therefore preferably for small station effective powers PI, P2, P3 of the
- Converter stations 1, 2, 3 used.
- a threshold value for the station effective power PI, P2, P3 of a converter station 1, 2, 3 is given and the
- Converter station 1, 2, 3 is for
- Threshold operated in the first mode of operation.
- the threshold value is, for example, equal to the sum of the minimum transmission powers of the power converters 4, 5 of the converter station 1, 2, 3 or greater than this sum.
- the converter station 1, 2, 3 is preferably operated in the second operating mode.
- Power converter 4, 5 set to the realized before operating mode change station effective power PI, P2, P3.
- the first operating mode is used in particular for switching on and switching off a converter station 1, 2, 3 in order to reduce or completely avoid an active power jump caused by switching on or off. Furthermore, when switching on a converter station 1, 2,
- Converter station 1, 2, 3 in the first operating mode, preferably by continuously changing the
- the switch-on active power and / or the switch-off active power can be in particular zero. This will make a gentle turn on and on
- the first operating mode of a converter station 1, 2, 3 is further preferably for a change of a
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Rectifiers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2017/080108 WO2019101306A1 (de) | 2017-11-22 | 2017-11-22 | Energieübertragung über eine bipolare hochspannungs-gleichstrom-übertragungsstrecke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3695504A1 true EP3695504A1 (de) | 2020-08-19 |
Family
ID=60702605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17816485.1A Ceased EP3695504A1 (de) | 2017-11-22 | 2017-11-22 | Energieübertragung über eine bipolare hochspannungs-gleichstrom-übertragungsstrecke |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11121645B2 (de) |
| EP (1) | EP3695504A1 (de) |
| CN (1) | CN111373648A (de) |
| CA (1) | CA3081773C (de) |
| WO (1) | WO2019101306A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4645670A3 (de) * | 2020-11-11 | 2025-12-24 | Mitsubishi Electric Corporation | Leistungsumwandlungssystem und steuerungsvorrichtung dafür |
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| JPH11252790A (ja) * | 1998-02-27 | 1999-09-17 | Mitsubishi Electric Corp | 直流送電方法 |
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| US20100046255A1 (en) * | 2005-12-21 | 2010-02-25 | Abb Technology Ltd. | Hvdc system |
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| DE1488085B2 (de) * | 1963-01-30 | 1970-12-17 | Allmänna Svenska Elektriska AB, Västeras (Schweden)j | Übertragungsanlage für hochgespannten Gleichstrom |
| SE339509B (de) * | 1970-02-19 | 1971-10-11 | Asea Ab | |
| DE2605793C2 (de) * | 1976-02-13 | 1984-09-27 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren zur Inbetriebnahme einer Station einer Hochspannungs-Gleichstrom-Übertragungsanlage (HGÜ) |
| DE3023698A1 (de) * | 1980-06-25 | 1982-01-14 | Brown, Boveri & Cie Ag, 6800 Mannheim | Verfahren zur inbetriebnahme einer von mehreren in reihe geschalteten stromrichtergruppen einer hochspannungs-gleichstrom-uebertragungsanlage |
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| CN104901327B (zh) * | 2014-03-07 | 2018-03-27 | Abb技术有限公司 | 用于黑启动的双极hvdc系统、控制器及方法 |
| CN104038040B (zh) * | 2014-06-30 | 2016-09-21 | 成都芯源系统有限公司 | 软关断控制模块、参考信号发生单元、功率变换器及相关控制方法 |
| CN105162155B (zh) * | 2015-08-26 | 2017-10-27 | 浙江大学 | 一种具有直流故障穿越能力的串联混合型双极直流输电系统 |
| CN105322570B (zh) * | 2015-11-03 | 2018-09-14 | 国家电网公司 | 一种农村光伏发电簇的协调控制装置及其控制方法 |
| CN106208128B (zh) * | 2016-08-24 | 2020-04-10 | 许继集团有限公司 | 一种混合三端高压直流输电系统的功率反转方法 |
| US9819188B1 (en) * | 2016-11-22 | 2017-11-14 | Abb Schweiz Ag | Direct current transmission system and method |
| CN107147141B (zh) * | 2017-04-20 | 2021-01-26 | 北京金风科创风电设备有限公司 | 风力发电机组的逆变器控制方法和装置 |
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2017
- 2017-11-22 CN CN201780097056.5A patent/CN111373648A/zh active Pending
- 2017-11-22 EP EP17816485.1A patent/EP3695504A1/de not_active Ceased
- 2017-11-22 CA CA3081773A patent/CA3081773C/en active Active
- 2017-11-22 WO PCT/EP2017/080108 patent/WO2019101306A1/de not_active Ceased
- 2017-11-22 US US16/766,436 patent/US11121645B2/en active Active
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| See also references of WO2019101306A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US11121645B2 (en) | 2021-09-14 |
| CN111373648A (zh) | 2020-07-03 |
| CA3081773A1 (en) | 2019-05-31 |
| CA3081773C (en) | 2021-03-16 |
| US20210036634A1 (en) | 2021-02-04 |
| WO2019101306A1 (de) | 2019-05-31 |
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