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44 条记录 (耗时 0.034 秒)

    Fault protection of HVDC transmission lines
    21.
    发明授权
    Fault protection of HVDC transmission lines 有权
    高压直流输电线路故障保护

    公开(公告)号：US08749933B2

    公开(公告)日：2014-06-10

    申请号：US13703930

    申请日：2010-09-13

    申请人： Bertil Berggren ,  Jianping Wang ,  Juiping Pan ,  Kailash Srivastava ,  Kerstin Linden ,  Reynaldo Nuqui

    发明人： Bertil Berggren ,  Jianping Wang ,  Juiping Pan ,  Kailash Srivastava ,  Kerstin Linden ,  Reynaldo Nuqui

    IPC分类号： H02H3/00 ,  H02H7/00

    CPC分类号： H02H3/42 ,  H02H3/38 ,  H02H3/445 ,  H02H7/268

    摘要： A protection system for high voltage direct current, HVDC, transmission lines is provided. The protection system includes a direct current, DC, bus, a device configured to connect an HVDC transmission line to the bus, at least one DC circuit breaker arranged for disconnecting the transmission line from the bus upon reception of a trip signal, current and voltage sensors, an inductor arranged such that the current through the transmission line passes the inductor, and a fault detection unit. The fault detection unit is arranged for assessing, on the basis of current and/or voltage measurements, whether a fault exists on the transmission line, and sending, if a fault is detected on the transmission line, a trip signal to the circuit breaker. The additional inductance limits the rise in fault current and facilitates a selective fault detection. Further, a method of fault protection for an HVDC transmission line is provided.

    摘要翻译： 提供高压直流，高压直流输电线路保护系统。 保护系统包括直流DC总线，被配置为将HVDC传输线连接到总线的装置，至少一个直流断路器，用于在接收到跳闸信号，电流和电压时将传输线与总线断开 传感器，布置成使得通过传输线的电流通过电感器的电感器和故障检测单元。 该故障检测单元被设置为基于当前和/或电压测量来评估传输线路上是否存在故障，并且如果在传输线路上检测到故障则发送到断路器的跳闸信号。 附加电感限制故障电流的上升，并有助于选择性故障检测。 此外，还提供了用于HVDC传输线的故障保护方法。

    DC GRID AND A METHOD OF LIMITING THE EFFECTS OF A FAULT IN A DC GRID
    22.
    发明申请
    DC GRID AND A METHOD OF LIMITING THE EFFECTS OF A FAULT IN A DC GRID 有权
    直流电网和限制直流电网故障影响的方法

    公开(公告)号：US20140002943A1

    公开(公告)日：2014-01-02

    申请号：US14004643

    申请日：2011-03-11

    申请人： Bertil Berggren ,  Jurgen Häfner ,  Lars-Erik Juhlin ,  Kerstin Linden ,  Lidong Zhang

    发明人： Bertil Berggren ,  Jurgen Häfner ,  Lars-Erik Juhlin ,  Kerstin Linden ,  Lidong Zhang

    IPC分类号： H02H9/02

    CPC分类号： H02H9/02 ,  H02H7/268

    摘要： A DC grid (100) comprising a plurality of AC/DC converters (105) which are interconnected via DC lines (115) is provided, wherein, in order to limit the effects of a fault in the DC grid, the DC grid is divided into at least two zones (200) by means of at least one current limiter (205) in a manner so that a current limiter is connected in each of the DC line(s) (115z) by which two zones are interconnected. A method of limiting the effects of a fault in a DC grid by dividing the DC grid into at least two zones is also provided.

    摘要翻译： 提供了包括通过DC线路（115）互连的多个AC / DC转换器（105）的直流电网（100），其中为了限制直流电网中的故障的影响，直流电网被划分 通过至少一个限流器（205）以至少两个区域（200）的方式进入至少两个区域（200），使得限流器连接在两个区域相互连接的每条直流线路（115z）中。 还提供了通过将DC网格划分成至少两个区域来限制DC网格中的故障的影响的方法。

    BREAKER FAILURE PROTECTION OF HVDC CIRCUIT BREAKERS
    23.
    发明申请
    BREAKER FAILURE PROTECTION OF HVDC CIRCUIT BREAKERS 有权
    断路器故障保护高压直流断路器

    公开(公告)号：US20130077204A1

    公开(公告)日：2013-03-28

    申请号：US13702333

    申请日：2010-09-13

    申请人： Bertil Berggren ,  Jianping Wang ,  Juiping Pan ,  Kerstin Linden ,  Reynaldo Nuqui

    发明人： Bertil Berggren ,  Jianping Wang ,  Juiping Pan ,  Kerstin Linden ,  Reynaldo Nuqui

    IPC分类号： H02H7/26

    CPC分类号： H02H7/268 ,  H02H3/044 ,  H02H3/05 ,  H02H3/445 ,  H02H7/222 ,  H02H7/30

    摘要： A breaker failure protection system for a high voltage direct current, HVDC, circuit breaker is provided. The circuit breaker is arranged for interrupting a DC circuit upon reception of a trip signal. The protection system includes a current sensor, at least one inductor, and a breaker failure detection unit. The current sensor is arranged for measuring a current I(t) through the DC circuit. The at least one inductor is connected in series with the DC circuit. The breaker failure detection unit is arranged for assessing, whether the circuit breaker has failed, and sending, if the circuit breaker has failed, a trip signal to an adjacent circuit breaker. The assessment is based on the measured current. The stability of HVDC grids may be improved by sending, in case of a breaker failure, a trip signal to adjacent circuit breakers. Further, a method of breaker failure protection for an HVDC circuit breaker is provided.

    摘要翻译： 提供高压直流，HVDC，断路器的断路器故障保护系统。 断路器被布置成在接收到跳闸信号时中断DC电路。 保护系统包括电流传感器，至少一个电感器和断路器故障检测单元。 电流传感器用于测量通过直流电路的电流I（t）。 至少一个电感器与DC电路串联连接。 断路器故障检测单元用于评估断路器是否发生故障，并且如果断路器发生故障，则发送到相邻断路器的跳闸信号。 评估是基于测量的电流。 在断路器故障的情况下，通过向相邻的断路器发送跳闸信号，可以提高HVDC电网的稳定性。 此外，提供了一种用于HVDC断路器的断路器故障保护的方法。

    DETERMINATION AND USE OF POWER SYSTEM SENSITIVITIES
    24.
    发明申请
    DETERMINATION AND USE OF POWER SYSTEM SENSITIVITIES 有权
    电力系统敏感性的确定和使用

    公开(公告)号：US20100094477A1

    公开(公告)日：2010-04-15

    申请号：US12418362

    申请日：2009-04-03

    申请人： Bertil Berggren ,  Mats Larsson ,  Tord Bengtsson ,  Petr Korba ,  Alexandre Oudalov

    发明人： Bertil Berggren ,  Mats Larsson ,  Tord Bengtsson ,  Petr Korba ,  Alexandre Oudalov

    IPC分类号： G06F19/00

    CPC分类号： H02J3/24 ,  H02J3/005 ,  Y02E60/728 ,  Y04S10/265

    摘要： The present disclosure relates to power system sensitivities as computed from power flow parameters and control parameters of a Power Flow Control Device (PFC). To this end, control parameter variations are applied to or generated by a PFC, and comprise variations in a control input u, a control effort e (injected series voltage, inserted series reactance), or a control effect q (power flow, active power transfer, phase-shift, current). A power flow response measuring unit measures a variation of a power flow response such as current, active or apparent power, in a way sufficiently synchronized with the control parameter variation to allow establishing an unambiguous causal relationship or correspondence in the form of a power system sensitivity. The latter may be on-line adapted to continuously reflect an updated aspect of the power system behaviour, and thus enable an improved, fast and reliable power flow control in power systems comprising a meshed power network with two parallel flow paths or corridors connecting two areas or sub-systems.

    摘要翻译： 本公开涉及根据功率流量参数和功率流量控制装置（PFC）的控制参数计算的电力系统灵敏度。 为此，控制参数变化应用于PFC或由PFC产生，并且包括控制输入u，控制工作e（注入的串联电压，插入的串联电抗）或控制效应q（功率流，有功功率） 转移，相移，电流）。 功率流响应测量单元以与控制参数变化充分同步的方式测量功率流响应（例如电流，有功或视在功率）的变化，以允许以电力系统灵敏度的形式建立明确的因果关系或对应关系 。 后者可以在线适应以连续反映电力系统行为的更新方面，并且因此能够在电力系统中实现改进的，快速和可靠的功率流控制，其包括具有两个平行流动路径的网状电力网络或连接两个区域的走廊 或子系统。

    Synchronous compensator plant
    27.
    发明授权
    Synchronous compensator plant 失效
    同步补偿器厂

    公开(公告)号：US06831388B1

    公开(公告)日：2004-12-14

    申请号：US08973017

    申请日：1998-03-25

    申请人： Mats Leijon ,  Bertil Berggren

    发明人： Mats Leijon ,  Bertil Berggren

    IPC分类号： H02K340

    CPC分类号： H02K15/00 ,  H01F3/10 ,  H01F3/14 ,  H01F27/288 ,  H01F27/323 ,  H01F27/34 ,  H01F29/14 ,  H01F2027/2833 ,  H01F2027/329 ,  H01F2029/143 ,  H02H3/025 ,  H02K1/165 ,  H02K3/14 ,  H02K3/28 ,  H02K3/40 ,  H02K3/48 ,  H02K9/19 ,  H02K11/048 ,  H02K15/12 ,  H02K2203/15 ,  Y10S174/13 ,  Y10S174/14 ,  Y10S174/15 ,  Y10S174/17 ,  Y10S174/19 ,  Y10S174/20 ,  Y10S174/22 ,  Y10S174/24 ,  Y10S174/25 ,  Y10S174/26 ,  Y10S174/28 ,  Y10S174/29

    摘要： The magnetic circuit of synchronous compensator plant is included in an electric machine which is directly connected to a high supply voltage of 20-800 kV, preferably higher than 36 kV. The electric machine is provided with solid insulation and its winding(s) is/are built up of a cable (6) intended for high voltage comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by at least one outer and one inner semiconducting layer (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The phases of the winding are Y-connected, and the Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point is earthed via a suppression filter. A procedure is used in the manufacture of a synchronous compensator for such plant, in which the cable used is threaded into the openings in the core for the magnetic circuit of the synchronous compensator.

    摘要翻译： 同步补偿装置的磁路包括在直接连接到20-800kV，优选高于36kV的高电源电压的电机中。 电机具有固体绝缘，其绕组由用于高电压的电缆（6）构成，其包括一个或多个载流导体（31），多个线束（36）被 至少一个外部和一个内部半导体层（34,32）和中间绝缘层（33）。 外部半导体层（34）处于地电位。 绕组的相位为Y形连接，并且Y点可以通过避雷器进行绝缘和保护以防过电压，否则Y点通过抑制滤波器接地。 制造用于这种设备的同步补偿器的过程被使用，其中使用的电缆被螺纹连接到用于同步补偿器的磁路的磁芯中的开口中。

    Breaker failure protection of HVDC circuit breakers
    30.
    发明授权
    Breaker failure protection of HVDC circuit breakers 有权
    HVDC断路器的断路器故障保护

    公开(公告)号：US09042071B2

    公开(公告)日：2015-05-26

    申请号：US13702333

    申请日：2010-09-13

    申请人： Bertil Berggren ,  Jianping Wang ,  Juiping Pan ,  Kerstin Linden ,  Reynaldo Nuqui

    发明人： Bertil Berggren ,  Jianping Wang ,  Juiping Pan ,  Kerstin Linden ,  Reynaldo Nuqui

    IPC分类号： H02H3/44 ,  H02H7/26 ,  H02H7/22 ,  H02H7/30

    CPC分类号： H02H7/268 ,  H02H3/044 ,  H02H3/05 ,  H02H3/445 ,  H02H7/222 ,  H02H7/30

    摘要： A breaker failure protection system for a high voltage direct current, HVDC, circuit breaker is provided. The circuit breaker is arranged for interrupting a DC circuit upon reception of a trip signal. The protection system includes a current sensor, at least one inductor, and a breaker failure detection unit. The current sensor is arranged for measuring a current I(t) through the DC circuit. The at least one inductor is connected in series with the DC circuit. The breaker failure detection unit is arranged for assessing, whether the circuit breaker has failed, and sending, if the circuit breaker has failed, a trip signal to an adjacent circuit breaker. The assessment is based on the measured current. The stability of HVDC grids may be improved by sending, in case of a breaker failure, a trip signal to adjacent circuit breakers. Further, a method of breaker failure protection for an HVDC circuit breaker is provided.

    摘要翻译： 提供高压直流，HVDC，断路器的断路器故障保护系统。 断路器被布置成在接收到跳闸信号时中断DC电路。 保护系统包括电流传感器，至少一个电感器和断路器故障检测单元。 电流传感器用于测量通过直流电路的电流I（t）。 至少一个电感器与DC电路串联连接。 断路器故障检测单元用于评估断路器是否发生故障，并且如果断路器发生故障，则发送到相邻断路器的跳闸信号。 评估是基于测量的电流。 在断路器故障的情况下，通过向相邻的断路器发送跳闸信号，可以提高HVDC电网的稳定性。 此外，提供了一种用于HVDC断路器的断路器故障保护的方法。