公开(公告)号：WO2015024950A1

公开(公告)日：2015-02-26

申请号：PCT/EP2014/067690

申请日：2014-08-19

Applicant: ALSTOM TECHNOLOGY LTD

Inventor： BARKER, Carl David ,  CANELHAS, Andre Paulo

IPC: H02J3/36 ,  H02H3/08

CPC classification number: H02J3/36 ,  H02H7/1213 ,  H02H7/1252 ,  H02H7/1257 ,  H02M1/32 ,  H02M5/458 ,  Y02E60/60

Abstract: In the field of high voltage power transmission an electrical assembly (10; 60) comprises a power converter (12) which includes first and second DC terminals (14, 16) that are connectable to a DC network (18), and an AC terminal (20) that is connectable to an AC network (22). The electrical assembly (10) also includes a grounding circuit (24) to connect the AC terminal (20) to ground (26). The grounding circuit (24) defines first and second current flow paths (28, 30) between the AC terminal (20) and ground (26). The first current flow path (28) includes a switching element (32) that is operable to selectively open and close the first current flow path (28). The second current flow path (30) includes a first current flow control element (34) that is configured to operate in a first mode in which it minimises the flow of current through the second current flow path (30) when the first current flow path (28) is open and thereby minimises the flow of current between the AC terminal (20) and ground (26) when the first current flow path (28) is open. The electrical assembly (10) additionally includes a control unit (42) operatively connected to the switching element (32), the control unit (42) being configured to operate the switching element (32) to maintain open the first current flow path (28) following an occurrence of a DC network fault. The power converter (12) is configured to continue transferring power between the DC and AC networks (18,22) throughout the DC network fault

Abstract translation: 在高压电力传输领域，电气组件（10; 60）包括功率转换器（12），其包括可连接到DC网络（18）的第一和第二DC端子（14,16）和AC端子 （20），其可连接到AC网络（22）。 电气组件（10）还包括用于将AC端子（20）连接到地（26）的接地电路（24）。 接地电路（24）限定了AC端子（20）和地（26）之间的第一和第二电流流路（28,30）。 第一电流流路（28）包括可操作以选择性地打开和关闭第一电流流路（28）的开关元件（32）。 第二电流流动路径（30）包括第一电流流动控制元件（34），其被配置为以第一模式操作，其中当第一电流流动路径（30）在最小化通过第二电流流路（30）的电流时， （28）打开，从而当第一电流流路（28）打开时最小化AC端子（20）和地（26）之间的电流流动。 电气组件（10）还包括可操作地连接到开关元件（32）的控制单元（42），所述控制单元（42）被配置为操作开关元件（32）以保持打开第一电流流路 ）发生DC网络故障。 功率转换器（12）被配置为在整个DC网络故障期间在DC和AC网络（18,22）之间继续传输功率

公开(公告)号：WO2015007621A1

公开(公告)日：2015-01-22

申请号：PCT/EP2014/064871

申请日：2014-07-10

Applicant: ALSTOM TECHNOLOGY LTD

Inventor： BARKER, Carl David ,  CANELHAS, Andre Paulo ,  ADAMCZYK, Andrzej

IPC: H02H9/04 ,  H02H9/00

CPC classification number: H02H9/045 ,  H02H7/268 ,  H02H9/041 ,  H02J1/06

Abstract: A voltage limiter (40), for controlling a voltage of a DC power transmission medium (28), comprises: first and second DC terminals (42, 44), the first DC terminal (42) being operatively connectable to the DC power transmission medium (28), the second DC terminal (44) being operatively connectable to ground; a current transmission path (46) extending between the first and second DC terminals (42, 44) and including first and second current transmission path portions (48, 50), the first and second current transmission path portions (48, 50) being connected in series between the first and second DC terminals (42, 44), the first current transmission path portion (48) including a first non-linear resistive element (52), the second current transmission path portion (50) including a second non-linear resistive element (54); a current bypass limb (56) connected in parallel with the second current transmission path portion (50), the current bypass limb (56) including at least one switching element (58a); and a control unit (60) configured to control switching of the or each switching element (58a) of the current bypass limb (56) being switchable to selectively switch the current bypass limb (56), during a fault condition of the DC power transmission medium (28), from a first mode to a second mode, wherein the current bypass limb (56) in the first mode permits a current flowing between the first and second DC terminals (42, 44) to flow through the current bypass limb (56) and thereby bypass the second current transmission path portion (50); and the current bypass limb (56) in the second mode inhibits a current flowing between the first and second DC terminals (42, 44) from flowing through the current bypass limb (56) and thereby permits the current flowing between the first and second DC terminals (42, 44) to flow through the second current transmission path portion (50).

Abstract translation: 用于控制DC电力传输介质（28）的电压的限压器（40）包括：第一和第二DC端子（42,44），第一DC端子（42）可操作地连接到DC电力传输介质 （28），所述第二DC端子（44）可操作地连接到地面; 在第一和第二直流端子（42,44）之间延伸并且包括第一和第二电流传输路径部分（48,50）的电流传输路径（46），第一和第二电流传输路径部分（48,50）被连接 串联在第一和第二DC端子之间，第一电流传输路径部分（48）包括第一非线性电阻元件（52），第二电流传输路径部分（50） 线性电阻元件（54）; 与第二电流传输路径部分（50）并联连接的电流旁路臂（56），包括至少一个开关元件（58a）的电流旁路臂（56）; 以及控制单元（60），其被配置为控制所述当前旁路臂（56）的每个开关元件（58a）的切换，以在所述直流输电的故障状态期间切换以选择性地切换所述电流旁路臂（56） 介质（28），从第一模式到第二模式，其中在第一模式中的电流旁路臂（56）允许在第一和第二DC端子（42,44）之间流动的电流流过电流旁路臂 56），从而绕过第二电流传输路径部分（50）。 并且第二模式中的电流旁路臂（56）抑制在第一和第二DC端子（42,44）之间流动的电流流过电流旁路臂（56），从而允许电流在第一和第二DC之间流动 端子（42,44）流过第二电流传输路径部分（50）。

公开(公告)号：WO2016012411A1

公开(公告)日：2016-01-28

申请号：PCT/EP2015/066574

申请日：2015-07-20

Applicant: ALSTOM TECHNOLOGY LTD

Inventor： JASIM, Omar Fadhel ,  CANELHAS, Andre Paulo

IPC: H02M7/797 ,  H02J3/26 ,  H02J3/18

CPC classification number: H02J3/26 ,  H02J3/1842 ,  H02M7/797 ,  H02M2001/0025 ,  Y02E40/22 ,  Y02E40/50

Abstract: In the field of high voltage direct current (HVDC) power transmission networks, a voltage source converter (10) comprising a controller (36) configured to; receive an active power order comprising the desired amount of active power to be transferred by the convertor and receive an reactive power order comprising the desired amount of reactive power to be transferred by the convertor; receive a measurement of the instantaneous voltage of each phase of the multi- phase AC electrical network; determine an active and reactive phase current reference value for each single- phase limb which is independent of the or each other respective phase current reference and which defines the current each single-phase limb is required to draw from or pass to a corresponding phase of the AC electrical network to effect the active power and reactive power exchanges with the AC electrical network defined by the active and reactive power orders; the active phase current reference values determined based on the received active power order, the instantaneous voltage measurements and a determination of a resultant instantaneous reactive power using said active phase current reference values; and/or the reactive phase current reference values determined based on the received reactive power order, the instantaneous voltage measurements and a determination of a resultant instantaneous active power using said reactive phase current reference values.

Abstract translation: 在高压直流（HVDC）输电网络领域，包括控制器（36）的电压源转换器（10） 接收包括要由转换器传送的期望量的有功功率的有功功率级，并接收包括要由转换器传送的期望量的无功功率的无功功率级; 接收多相交流电网各相瞬时电压的测量值; 确定每个单相肢体的有功和无功相电流参考值，该参考值独立于或相互分开各自的相电流基准，并且其定义了每个单相支路所需要从或从相应的相位 交流电网实现有功功率和无功功率交流与交流电网定义的有功和无功功率指令; 基于所接收的有功功率次序确定的有源相电流基准值，瞬时电压测量值和使用所述有源相电流参考值的合成瞬时无功功率的确定; 和/或基于所接收的无功功率级，瞬时电压测量值和使用所述无功相电流参考值的合成瞬时有功功率的确定确定的无功相电流参考值。