公开(公告)号：WO2017210892A1

公开(公告)日：2017-12-14

申请号：PCT/CN2016/085264

申请日：2016-06-08

Applicant: ABB SCHWEIZ AG ,  ANDERSSON, Mats ,  CAI, Rong ,  XIE, Hailian ,  ZHANG, Lidong

Inventor： ANDERSSON, Mats ,  CAI, Rong ,  XIE, Hailian ,  ZHANG, Lidong

IPC: H02J3/36

CPC classification number: H02J3/36 ,  Y02E60/60

Abstract: It provides a control system for LCC of an HVDC system and a control method therefor. The control system includes: a first measurement unit (20) being configured to provide a current magnitude measurement indicative of a magnitude of DC current of the HVDC system; and a controller (21) being configured to increase a first extinction angle at which the controlled LCC operates to a second extinction angle in response to that the current magnitude measurement exceeds a current reference level in order to avoid commutation failure of the controlled LCC. By using the solutions according to the HVDC system with increase of extinction angle of the LCC, it is possible to decrease the probability of commutation failures caused by a rapid rise of the DC current of the HVDC system. The overall AC and DC power system reliability and stability is improved.

Abstract translation: 它提供了用于HVDC系统的LCC的控制系统及其控制方法。 所述控制系统包括：第一测量单元（20），其被配置为提供指示所述HVDC系统的DC电流的大小的电流量值测量值; 以及控制器（21），被配置为响应于所述电流幅度测量值超过电流参考水平而将所述受控LCC操作的第一消光角增加到第二消光角，以避免所述受控LCC的换相失败。 通过使用根据HVDC系统的解决方案，随着LCC的消光角度的增加，可以降低由HVDC系统的DC电流的快速上升引起的换相失败的可能性。 整个交流和直流电力系统的可靠性和稳定性得到改善。

公开(公告)号：WO2021037357A1

公开(公告)日：2021-03-04

申请号：PCT/EP2019/072986

申请日：2019-08-28

Applicant: ABB SCHWEIZ AG

Inventor： MAJUMDER, Ritwik ,  BERGGREN, Bertil ,  SCHAEFFER, David ,  ZHANG, Lidong ,  DIJKHUIZEN, Frans

IPC: H02J3/08 ,  H02J3/36 ,  H02J3/00 ,  H02H3/06 ,  H02H7/28

Abstract: A method for restoration of a fault isolation in a medium voltage, MV, network having a plurality of feeders and a plurality of normally open, NO, switches (NO1, NO2, NO3, NO4)possibly in parallel with MV direct current, DC, links (MVDC1, MVDC2, MVDC3, MVDC4)is presented. The method is performed in a control device (1) of the MV network. The method comprises closing (S120) at least two NO switches in parallel with MVDC links of the plurality of NO switches, being connected to a fault isolated feeder of the plurality of feeders of the MV network, and opening (S150) the closed at least two NO switches in parallel with MVDC links except one.A control device, a computer program and a computer program product for restoration of a fault isolation in a MV network are also presented.

公开(公告)号：WO2018210424A1

公开(公告)日：2018-11-22

申请号：PCT/EP2017/061992

申请日：2017-05-18

Applicant: ABB SCHWEIZ AG

Inventor： BERGGREN, Bertil ,  ZHANG, Lidong ,  LARSSON, Mats

IPC: H02J3/36

CPC classification number: H02J3/36 ,  H02J2003/007

Abstract: It is presented a method for determining setpoint parameters for controlling a HVDC link (10) provided in parallel with a transmission corridor (11) comprising at least one AC line (12a, 12b). The comprises the steps of: obtaining a first set of measurements of a first end of the transmission corridor; obtaining a second set of measurements of a second end of the transmission corridor; determining which one of a first area (5a), connected to the first end of the transmission corridor, and a second area (5b), connected to the second end of the transmission corridor, that has a deficit of active power and which one of the first area and the second area of the transmission corridor that has a surplus of active power; determining a model equivalent, based on a corridor equivalent of the transmission corridor and a generator equivalent of the area operating predominately as a generator; and determining setpoint parameters for the HVDC link based on the model equivalent.

公开(公告)号：WO2021139896A1

公开(公告)日：2021-07-15

申请号：PCT/EP2020/050566

申请日：2020-01-10

Applicant: ABB SCHWEIZ AG

Inventor： BERGGREN, Bertil ,  MAJUMDER, Ritwik ,  ZHANG, Lidong

IPC: H02J3/06 ,  H02J3/36

Abstract: A method for transfer of power between medium voltage, MV, feeders via a MV direct current, MVDC, link in a power distribution network is presented. The method is performed in a controller (1) in the power distribution network and comprises setting (S100) an iteration step value for each of a set of power reference quantitiesof the MVDC link, and setting an initial value of each of the set of power reference quantities, iteratively changing values of each of the set of power reference quantities, and selecting one changed value of the set of power reference quantities by: changing (S120) a present value of each of the set of power reference quantities, one at a time, with the set iteration step value, respectively, into a new value, and measuring a total active power at a substation of the power distribution network for each of the new value, one at a time, and selecting (S140) the new value of the one of the set of power reference quantities that provides the lowest measured total active power at the substation, wherein a next iteration is performed with the selected new value as present value for the one of the set of power reference quantities and with the present value for the other of the set of power reference quantities. A controller for transfer of power between MV feeders via a MVDC link in a power distribution network is also presented.

公开(公告)号：WO2018076329A1

公开(公告)日：2018-05-03

申请号：PCT/CN2016/103976

申请日：2016-10-31

Applicant: ABB SCHWEIZ AG ,  ANDERSSON, Mats ,  YUAN, Chunming ,  ZHANG, Lidong ,  YANG, Xiaobo

Inventor： ANDERSSON, Mats ,  YUAN, Chunming ,  ZHANG, Lidong ,  YANG, Xiaobo

IPC: H02M7/757

CPC classification number: H02M7/7575 ,  H02J3/36 ,  H02M7/757 ,  Y02E60/60

Abstract: It provides an HVDC converter system, a method therefor and an HVDC system using the same. The HVDC converter system includes a plurality of VSCs (110,111,120,121) being coupled at their DC sides in series, wherein two terminals of the series connection are configured to be coupled with HVDC network; a plurality of by-pass breakers (112,113,122,123), each being in parallel coupled with the DC side of the corresponding one of the plurality of VSCs (110,111,120,121) and being closed where its corresponding VSC is blocked; and a controller (15), being adapted to control current following through the closed by-pass breaker to reach zero and subsequently control the closed by-pass breaker to open. By controlling the by-pass breaker associated with the VSC to be taken in to reach zero current in the first place and then opening the by-pass breaker and deblocking the VSC, the by-pass breaker can be opened in a reliable way independent of zero-crossing of the by-pass breaker naturally would have generated, otherwise, by using converter system built up of LCCs. Therefore, a blocked VSC of converter system of a converter station for HVDC transmission system can be reliably taken into operation, while the other VSC is still operating.

Abstract translation: 它提供了一种HVDC转换器系统及其方法和使用该HVDC转换器系统的HVDC系统。 HVDC转换器系统包括多个串联连接在其DC侧的多个VSC（110,111,120,121），其中串联连接的两个端子被配置为与HVDC网络耦合; 多个旁路断路器（112,113,122,123），每个旁路断路器与所述多个VSC（110,111,120,121）中的对应的一个的DC侧并联耦合，并且在其对应的VSC被阻断的情况下闭合; 和控制器（15），适于控制通过闭合旁路断路器的电流达到零，并且随后控制闭合旁路断路器打开。 通过控制与VSC相关联的旁路断路器，以首先达到零电流，然后打开旁路断路器并解锁VSC，旁路断路器可以以可靠的方式打开，独立于 通过使用由LCC构成的转换器系统，旁路断路器的零交叉自然会产生。 因此，高压直流输电系统换流站换流站系统的闭锁VSC可以可靠地投入运行，而另一个VSC仍在运行。

公开(公告)号：WO2017190291A1

公开(公告)日：2017-11-09

申请号：PCT/CN2016/080981

申请日：2016-05-04

Applicant: ABB SCHWEIZ AG ,  ANDERSSON, Mats ,  CAI, Rong ,  XIE, Hailian ,  ZHANG, Lidong

Inventor： ANDERSSON, Mats ,  CAI, Rong ,  XIE, Hailian ,  ZHANG, Lidong

IPC: H02J3/18 ,  H02J3/36

CPC classification number: H02J3/36 ,  H02J3/1814 ,  Y02E40/18 ,  Y02E60/60

Abstract: It provides a power conversion circuit for interfacing an AC grid to an HVDC transmission line in islanding condition, a power system and the method thereof. The power conversion circuit includes: a current source conversion circuit configured to supply a power output from the AC grid to a load through the HVDC transmission line; a voltage source conversion circuit configured to compensate a reactive AC power of the AC grid; a measurement unit configured to provide a voltage magnitude measurement and a voltage frequency measurement indicative of the AC grid voltage magnitude and the AC grid voltage frequency; and a controller configured to control the current source conversion circuit to adjust an active power balance between the AC grid and the load based on a voltage magnitude deviation of the voltage magnitude measurement from a predetermined voltage magnitude command and control the voltage source conversion circuit to adjust a reactive power balance between the AC grid and the load based on a voltage frequency deviation of the voltage frequency measurement from a predetermined voltage frequency command. This makes it possible for reducing the complexity of the control for distributed system and thus increasing the power system stability.

Abstract translation: 它提供了用于在孤岛条件下将AC电网连接到HVDC传输线的电力转换电路，电力系统及其方法。 所述电力转换电路包括：电流源转换电路，被配置为通过所述HVDC传输线将来自所述AC电网的电力输出提供给负载; 电压源转换电路，被配置为补偿AC电网的无功AC电力; 测量单元，其被配置为提供指示所述AC电网电压幅度和所述AC电网电压频率的电压幅度测量值和电压频率测量值; 以及控制器，配置为基于来自预定电压幅度指令的电压幅度测量值的电压幅度偏差来控制电流源转换电路以调整AC电网和负载之间的有功功率平衡，并控制电压源转换电路调整 基于来自预定电压频率命令的电压频率测量的电压频率偏差，在AC电网和负载之间的无功功率平衡。 这可以降低分布式系统控制的复杂性，从而提高电力系统的稳定性。

公开(公告)号：WO2018188725A1

公开(公告)日：2018-10-18

申请号：PCT/EP2017/058560

申请日：2017-04-10

Applicant: ABB SCHWEIZ AG

Inventor： BERGGREN, Bertil ,  ZHANG, Lidong ,  SRIVASTAVA, Kailash ,  LARSSON, Mats

IPC: H02J3/36

CPC classification number: H02J3/36 ,  H02J2003/365 ,  Y02E60/60

Abstract: A power transmission system (100) is disclosed, comprising at least a first Alternating Current (AC) region (10) and a second AC region (20) interconnected by at least one AC power transmission line (31, 32), a DC link (40) interconnecting the first AC region (10) and the second AC region (20), and at least a first converter station (50) configured to control flow of power therethrough between the DC link (40) and the first AC region (10). The power transmission system (100) comprises a control unit (70) configured to control flow of power through the first converter station (50) between the DC link (40) and the first AC region (10) by generating a control signal based on phasor measurement entity (PME) measurements in or from the first AC region (10) and in or from the second AC region (20), respectively, in particular based on a comparison or difference between a second AC phase angle, determined based on one or more AC phasors measured in the second AC region (20), and a first AC phase angle, determined based on one or more AC phasors measured in the first AC region (10).

公开(公告)号：EP3487060A1

公开(公告)日：2019-05-22

申请号：EP17202372.3

申请日：2017-11-17

Applicant: ABB Schweiz AG

Inventor： HARNEFORS, Lennart ,  ZHANG, Lidong

IPC: H02M7/5387

Abstract: The present disclosure relates to a method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method comprises: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component i d ref of a reference current vector ( i ref ) based on an active power reference (P ref ) for the VSC, determining the reference current vector ( i ref ) based on the active power producing current component i d ref , determining a damping component based on a virtual damping resistance (R a ), the reference current vector ( i ref ) and the VSC current vector ( i ), determining a voltage vector ( v ) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector ( v ).

公开(公告)号：EP4022732A1

公开(公告)日：2022-07-06

申请号：EP19761821.8

申请日：2019-08-28

Applicant: ABB Schweiz AG

Inventor： MAJUMDER, Ritwik ,  BERGGREN, Bertil ,  SCHAEFFER, David ,  ZHANG, Lidong ,  DIJKHUIZEN, Frans

IPC: H02J3/08 ,  H02J3/36 ,  H02J3/00 ,  H02H3/06 ,  H02H7/28

公开(公告)号：EP3625867A1

公开(公告)日：2020-03-25

申请号：EP17724807.7

申请日：2017-05-18

Applicant: ABB Schweiz AG

Inventor： BERGGREN, Bertil ,  ZHANG, Lidong ,  LARSSON, Mats

IPC: H02J3/36