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1.发明授权
公开(公告)号：US5621626A
公开(公告)日：1997-04-15
申请号：US538219
申请日：1995-10-03
摘要： An installation for transmission of high-voltage direct current comprises a first and a second converter (SR1, SR2, respectively), each one controlled by a separate piece of control equipment (CE1, CE2, respectively). Each one of the pieces of control equipment comprises a current controller (CC). The current controller of the second converter is supplied with a second current reference value (IOL2) and a current margin (IOM). The control equipment of the second converter comprises a function-forming member (11), which in dependence on an applied measured value (UD) of the direct voltage forms the current margin such that, when the direct voltage exceeds a first preselected voltage level (Udf), it assumes a first value (IOMf) and, when the direct voltage is lower than the first voltage level, it assumes a second value (IOMs), the magnitude of the second value being greater than the magnitude of the first value.
摘要翻译： 用于传输高压直流电的装置包括第一和第二转换器（分别为SR1，SR2），每个转换器由分别的控制设备（分别为CE1，CE2）控制。 控制设备中的每一个包括电流控制器（CC）。 第二转换器的电流控制器被提供有第二电流参考值（IOL2）和电流裕量（IOM）。 第二转换器的控制设备包括功能形成构件（11），其根据所施加的直流电压的测量值（UD）形成电流裕度，使得当直流电压超过第一预选电压电平（ Udf），它假设第一值（IOMf），并且当直流电压低于第一电压电平时，它采用第二值（IOM），第二值的幅度大于第一值的大小。
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2.发明授权
公开(公告)号：US5627735A
公开(公告)日：1997-05-06
申请号：US558083
申请日：1995-11-13
CPC分类号： H02M7/7575 , H02J3/1807 , H02J3/36 , H02J2003/365 , Y02E40/30 , Y02E60/60
摘要： A series-compensated converter station included in an installation for transmission of high-voltage direct current comprises a converter (SR1, SR2) with at least one 6-pulse bridge (BR). Via series capacitors (SCR, SCS, SCT) the 6-pulse bridge is connected to a three-phase alternating-voltage network (N1, N2) with a fundamental frequency (f.sub.01, f.sub.02). Control equipment (CE1, CE2) generates an ordered value (AOL) of a control angle (.alpha.) for valves (V1-V6) included in the 6-pulse bridge in dependence on a limiting signal (AMAXL) capable of being influenced. An amplitude signal (AMPL) is formed which corresponds to the amplitude (C.sub.1) for a component (C.sub.1 cos(2.pi.f.sub.0 t+.phi..sub.1)) of the fundamental frequency in the direct voltage (Udb) of the 6-pulse bridge and a compensating signal (ACOMP) is continuously calculated in dependence on a sensed voltage (Un1, Un2) at the converter station and on the amplitude signal. The limiting signal is formed in dependence on the compensating signal for the purpose of maintaining the commutating margin (.gamma..sub.m) for the valves equal to at least the preselected value (.gamma..sub.p) in case of unbalance between the voltages (UCR, UCS, UCT) of the series capacitors. (FIG. 6)
摘要翻译： 包括在用于传输高压直流电的设备中的串联补偿转换站包括具有至少一个6脉冲桥（BR）的转换器（SR1，SR2）。 通过串联电容器（SCR，SCS，SCT），6脉冲桥连接到基频（f01，f02）的三相交流电压网络（N1，N2）。 控制设备（CE1，CE2）根据能够受到影响的限制信号（AMAXL）产生包含在6脉冲桥中的阀门（V1-V6）的控制角（α）的有序值（AOL）。 形成对应于6脉冲桥的直流电压（Udb）中的基频的分量（C1cos（2πf0t+ phi1））的振幅（C1）的振幅信号（AMPL）和补偿信号 （ACOMP）根据转换器站处的感测电压（Un1，Un2）和幅度信号连续计算。 根据补偿信号形成限制信号，以便在电压（UCR，UCS，UCT）之间的不平衡的情况下将阀的换向裕度（γm）保持为至少预选值（γp） ）串联电容器。 （图6）
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3.发明授权
公开(公告)号：US5701239A
公开(公告)日：1997-12-23
申请号：US598389
申请日：1996-02-08
摘要： An installation for transmission of electric power by means of high-voltage direct current has two converters (SRI, SRII), each of which is connected to an alternating-voltage network (NI, NII) and which are connected to each other through a dc connection (L). One converter (SRI) is controlled as a rectifier and another converter (SRII) is controlled as an inverter. One converter (SRI) is current-controlling and another converter (SRII) is voltage-controlling. The installation has means (VARC.sub.rect) adapted, at such a change of the control angle (.alpha..sub.rect) of the current-controlling converter (SRI) that the angle reaches a limit of a predetermined interval (.alpha..sub.max nom rect -.alpha..sub.min nom rect) to control, by means of the voltage-controlling converter (SRII), the direct voltage (Ud) of the transmission in such a way that said change is limited.
摘要翻译： 通过高压直流电传输电力的设备有两个转换器（SRI，SRII），每个转换器连接到一个交流电压网络（NI，NII），并通过一个直流 连接（L）。 一个转换器（SRI）被控制为整流器，另一个转换器（SRII）被控制为逆变器。 一个转换器（SRI）是电流控制，另一个转换器（SRII）是电压控制的。 安装具有在电流控制转换器（SRI）的角度达到预定间隔的极限（αmax nom rect-αmin nom rect）的控制角（α1）的这种改变的情况下适用的装置（VARCrect） ）通过电压控制转换器（SRII）来控制变速器的直流电压（Ud），使得所述变化受到限制。
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4.发明授权公开(公告)号：US09000623B2
公开(公告)日：2015-04-07
申请号：US14357310
申请日：2011-11-11
申请人： Bertil Berggren , Lars-Erik Juhlin
发明人： Bertil Berggren , Lars-Erik Juhlin
IPC分类号： H01H19/64 , H01H31/10 , H01H33/52 , H01H33/59 , H01H47/00 , H01H85/46 , H02B1/00 , H02H7/26 , H02J3/36
CPC分类号： H02B1/00 , H02H7/268 , H02J3/36 , Y02E60/60 , Y10T307/747
摘要： A high voltage direct current (HVDC) switchyard is provided. The switchyard is arranged for interconnecting three or more sections of an HVDC power network, such as transmission lines, converters, or any other type of HVDC equipment. The switchyard comprises at least one main circuit breaker and at least four transfer switches. The at least one main circuit breaker and the at least four transfer switches are arranged so as to enable to individually disconnect any one of the at least three sections of the HVDC power distribution network. In an embodiment of the invention, the transfer switches which usually are comprised in direct current (DC) hybrid circuit breakers are used as selector switches, thereby reducing the number of main breakers in the switchyard.
摘要翻译： 提供高压直流（HVDC）开关场所。 开关站设置用于互连HVDC电力网络的三个或更多个部分，例如传输线，转换器或任何其他类型的HVDC设备。 开关机构包括至少一个主断路器和至少四个转换开关。 所述至少一个主断路器和所述至少四个转换开关被布置成能够独立地断开所述HVDC配电网络中的所述至少三个部分中的任何一个。 在本发明的一个实施例中，通常包括在直流（DC）混合断路器中的转换开关用作选择器开关，从而减少了开关站中的主断路器的数量。
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公开(公告)号：US20140055903A1
公开(公告)日：2014-02-27
申请号：US14007926
申请日：2011-04-04
申请人： Lars-Erik Juhlin
发明人： Lars-Erik Juhlin
IPC分类号： H01H71/00
摘要： A breaker failure detection device for a direct current (DC) circuit breaker (200) is provided. The circuit breaker comprises a circuit breaking element (204) and a non-linear resistor, e.g., a surge arrester (205), connected in parallel. The breaker failure detection device comprises a current sensor (212, 213, 214, 215), for measuring a current commutating from the circuit breaking element (204), and a breaker failure detection unit (211). The breaker failure detection unit (211) is arranged for comparing the measured current to desired values and deciding that an internal commutation process of the circuit breaker (200) does not proceed as desired if the measured current deviates from the desired values. The present invention makes use of an understanding that an improved detection of breaker failures may be achieved by monitoring the internal commutation process of the circuit breaker. Further, a method of breaker failure detection is provided.
摘要翻译： 提供一种用于直流（DC）断路器（200）的断路器故障检测装置。 断路器包括并联连接的断路元件（204）和非线性电阻器（例如避雷器（205））。 断路器故障检测装置包括用于测量从断路元件（204）换向的电流的电流传感器（212,213,214,215）和断路器故障检测单元（211）。 断路器故障检测单元（211）被布置成用于将测量的电流与期望值进行比较，并且如果测量的电流偏离期望值，则确定断路器（200）的内部换向过程不需要进行。 本发明利用这样的理解可以通过监视断路器的内部换向过程来实现对断路器故障的改进的检测。 此外，提供了一种断路器故障检测方法。
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公开(公告)号：US20120033462A1
公开(公告)日：2012-02-09
申请号：US13262926
申请日：2009-04-06
申请人： Lars-Erik Juhlin
发明人： Lars-Erik Juhlin
IPC分类号： H02J3/36
CPC分类号： H02J3/36 , Y02E60/60 , Y10T307/544 , Y10T307/707
摘要： A meshed HVDC power transmission network comprises at least three HVDC converter stations interconnected in a first closed path by at least three transmission lines. A first DC power flow control device is series connected to a first of the at least three transmission lines. That first DC power flow control device takes its power from the first transmission line and balances the DC current distribution in the first closed path.
摘要翻译： 网状HVDC电力传输网络包括至少三个HVDC转换站，其在第一封闭路径中由至少三条传输线互连。 第一直流电力流量控制装置串联连接至至少三条传输线中的第一条。 该第一直流电流控制装置从第一传输线路接收电力并平衡第一封闭路径中的直流电流分布。
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7.发明授权公开(公告)号：US08884176B2
公开(公告)日：2014-11-11
申请号：US13504411
申请日：2009-10-27
申请人： Lars-Erik Juhlin
发明人： Lars-Erik Juhlin
CPC分类号： H01H33/596 , H01H9/167 , H01H33/161 , H01H2009/0083
摘要： The invention relates to an HVDC breaker (300) comprising at least two individually controllable HVDC breaker sections (305) connected in series, wherein the HVDC breaker is arranged in a manner so that the number of HVDC breaker sections tripped upon tripping of the HVDC breaker depends on the operational event in response to which the tripping occurs. The invention further relates to a control apparatus (400) for controlling the HVDC breaker, as well as to a method of breaking an HVDC line. The method comprises receiving (500) a system status signal indicative of an operational event requiring the breaking of the HVDC line, and determining (505) the number of HVDC breaker sections required for the breaking.
摘要翻译： 本发明涉及一种HVDC断路器（300），其包括串联连接的至少两个可独立控制的HVDC断路器部分（305），其中HVDC断路器被布置成使得在HVDC断路器跳闸时HVDC断路器部件的数量跳闸 取决于发生跳闸的操作事件。 本发明还涉及用于控制HVDC断路器的控制装置（400）以及破坏HVDC线路的方法。 该方法包括接收（500）指示需要断开HVDC线路的操作事件的系统状态信号，以及确定（505）断开所需的HVDC断路器部分的数量。
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8.发明授权Current limitation system for limiting the effects of a fault in a DC grid and a method of operating a current limitation system 有权用于限制直流电网故障影响的电流限制系统和运行电流限制系统的方法公开(公告)号：US08817427B2
公开(公告)日：2014-08-26
申请号：US13983996
申请日：2011-03-11
摘要： A current-limitation system for limiting a current through an DC connection in case of a fault occurring in a DC grid of which the DC connection forms a part is provided, as well as a method of operating a current-limitation system for limiting a current through an DC connection in case of a fault occurring in a DC grid of which the DC connection forms a part.
摘要翻译： 提供了一种电流限制系统，用于限制在直流连接形成一部分的直流电网中发生故障的情况下通过直流连接的电流，以及一种操作电流限制系统以限制电流的方法 通过DC连接，在DC连接形成部件的直流电网中发生故障的情况下。
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9.发明申请公开(公告)号：US20120026760A1
公开(公告)日：2012-02-02
申请号：US13262885
申请日：2009-04-06
申请人： Lars-Erik Juhlin
发明人： Lars-Erik Juhlin
IPC分类号： H02J3/36
摘要： In a multi-terminal HVDC power transmission network comprising at least three HVDC converter stations interconnected by at least two transmission lines, where at least one of the transmission lines is a long line, an active voltage source device is series connected to one of the transmission lines, which maintains the DC voltage of the transmission lines of the network to be within a predefined voltage range by injecting an additional DC voltage in series with the one transmission line.
摘要翻译： 在包括由至少两条传输线互连的至少三个HVDC转换站的多端子HVDC电力传输网络中，其中至少一条传输线是长线，有源电压源装置串联连接到传输 线路，其通过与一条传输线串联注入附加的直流电压，将网络的传输线路的直流电压保持在预定的电压范围内。
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10.发明授权Method and apparatus for controlling the alternating voltage of a static convertor 失效用于控制静态转换器的交流电压的方法和装置
公开(公告)号：US4199804A
公开(公告)日：1980-04-22
申请号：US888587
申请日：1978-03-20
申请人： Lars-Erik Juhlin
发明人： Lars-Erik Juhlin
CPC分类号： H02J3/1828 , H02M7/7575 , Y02E40/30 , Y02E60/60
摘要： An improved reactive power control for a static convertor wherein the improved control compensates for voltage transients caused by the connection and disconnection of reactance elements in an AC convertor network by making corresponding transient adjustments in a normal control angle of the convertor. A maximum angular increment in the direction of 90.degree. is applied to the normal control angle when the AC reactance switching occurs. If a capacitive reactance element is connected to the AC network, the maximum angular increment is rapidly built up after the connection and is thereafter gradually reduced. If the capacitive reactive element is disconnected from the AC network, the maximum angular increment is gradually built-up prior to the disconnection and after the disconnection the maximum angular increment is rapidly reduced. The sequence of incremental control angle build-up and reduction is reversed if the reactance element is a reactor.
摘要翻译： 一种用于静态转换器的改进的无功功率控制，其中改进的控制通过在转换器的正常控制角中进行相应的瞬态调整来补偿由AC转换器网络中的电抗元件的连接和断开引起的电压瞬变。 当发生交流电抗切换时，向正常控制角施加90°方向的最大角度增量。 如果电容电抗元件连接到AC网络，则最大角度增量在连接之后迅速建立，然后逐渐减小。 如果电容性无源元件与AC网络断开连接，则最大角度增量在断开之前逐渐建立起来，并且在断开连接之后，最大角度增量迅速减小。 如果电抗元件是反应器，则增量控制角积累和减少的顺序相反。
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