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。

公开(公告)号：US20130088802A1

公开(公告)日：2013-04-11

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： H02H3/42

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。

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。

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。

公开(公告)号：US20120181862A1

公开(公告)日：2012-07-19

申请号：US13309201

申请日：2011-12-01

申请人： Lars Gertmar ,  Dennis Kron ,  Juiping Pan ,  Yao Chen ,  Richard W. Vesel ,  Arash A. Babaee

发明人： Lars Gertmar ,  Dennis Kron ,  Juiping Pan ,  Yao Chen ,  Richard W. Vesel ,  Arash A. Babaee

IPC分类号： H02J3/34

CPC分类号： H02J1/102 ,  H02J3/18 ,  Y10T307/336

摘要： An apparatus for use in an electrical power generation plant. The apparatus includes: at least two adjustable speed drives, each connected, on an alternating current side, to an associated auxiliary motor; at least one reactive power consuming auxiliary device connected to an alternating current bus; a controller; a converter for converting alternating current to direct current or vice versa between the alternating current bus and a direct current bus; and at least one electrical power source arranged to provide power to the direct current bus. Each of the at least two adjustable speed drive is connected, on a direct current side, to the direct current bus.

摘要翻译： 一种用于发电厂的设备。 该装置包括：至少两个可调速驱动器，每个在交流电侧连接到相关联的辅助马达; 连接到交流母线的至少一个无功功率辅助装置; 控制器 用于在交流母线和直流总线之间将交流电转换为直流或反之亦然的转换器; 以及至少一个电源，被布置成向直流母线提供电力。 至少两个可调速驱动器中的每一个在直流侧连接到直流总线。