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：US07272515B2

公开(公告)日：2007-09-18

申请号：US11081042

申请日：2005-03-15

申请人： John M. Peterson ,  Steven A. Kunsman ,  Mohamed Y Haj-Maharsi ,  Reynaldo Nuqui ,  James Stoupis

发明人： John M. Peterson ,  Steven A. Kunsman ,  Mohamed Y Haj-Maharsi ,  Reynaldo Nuqui ,  James Stoupis

IPC分类号： G01R31/00

CPC分类号： H02H1/0015 ,  H02H1/0053 ,  H02H1/0092

摘要： A digital signal processor implementation of three algorithms used to detect high impedance faults. The algorithms can be wavelet based, higher order statistics based and neural network based. The algorithms are modified to process one second of data instead of ten seconds of data and a double buffered acquisition is connected to the output of the algorithms.

摘要翻译： 一种用于检测高阻抗故障的三种算法的数字信号处理器实现。 算法可以基于小波，基于高阶统计和神经网络。 这些算法被修改为处理数据的一秒而不是十秒的数据，并且双缓冲采集被连接到算法的输出。

公开(公告)号：US09007733B2

公开(公告)日：2015-04-14

申请号：US14355449

申请日：2011-11-01

申请人： Jianping Wang ,  Jiuping Pan ,  Reynaldo Nuqui

发明人： Jianping Wang ,  Jiuping Pan ,  Reynaldo Nuqui

IPC分类号： H02H3/00 ,  G01R31/08 ,  H02H7/26

CPC分类号： G01R31/088 ,  G01R31/085 ,  H02H7/265

摘要： An improved method of fault detection in a high-voltage direct current (HVDC) power transmission line is provided. The fault detection is based on fault-induced travelling waves. The method comprises estimating an amplitude of fault-induced travelling waves at the fault location, and calculating a fault resistance (Rf) based on the estimated amplitude, an estimated pre-fault voltage at the fault location, and a surge impedance of the transmission line. The estimated fault amplitude and the estimated pre-fault voltage are calculated from voltage measurements performed at both ends of the transmission line. Further, a fault detection device is provided.

摘要翻译： 提供了一种改进的高压直流（HVDC）输电线路故障检测方法。 故障检测基于故障引起的行波。 该方法包括估计故障位置处的故障诱发的行波的振幅，以及基于估计的振幅，故障位置处的估计的故障前电压和传输线的浪涌阻抗来计算故障电阻（Rf） 。 估计的故障振幅和估计的故障前电压由传输线两端执行的电压测量计算。 此外，提供故障检测装置。

公开(公告)号：US20150222122A1

公开(公告)日：2015-08-06

申请号：US14428630

申请日：2012-10-09

申请人： Reynaldo NUQUI ,  Yao CHEN ,  Jiuping PAN

发明人： Reynaldo F. Nuqui ,  Cathy Yao Chen ,  Jiuping Pan

IPC分类号： H02J3/40 ,  H02P9/00

CPC分类号： H02J3/40 ,  H02H7/067 ,  H02P1/029 ,  H02P9/006 ,  H02P9/10 ,  Y10T307/729 ,  Y10T307/735

摘要： Methods, systems, and computer readable media for adaptive out of step protection for power generators with load resynchronization capability are disclosed. According to one method, when a fault condition occurs in a load being supplied by a power generator, a number of pole slips expected to occur in the generator due to the fault before resynchronization is estimated. It is determined whether the estimated number of pole slips exceeds a threshold. An offline or online status of the generator is controlled based on the determination as to whether the estimated number of pole slips exceeds the threshold.

摘要翻译： 公开了用于具有负载再同步能力的发电机的自适应失步保护的方法，系统和计算机可读介质。 根据一种方法，当在由发电机提供的负载中发生故障状况时，估计由于再同步之前的故障而在发电机中发生的极滑数量。 确定估计的极滑数是否超过阈值。 基于关于所估计的极滑数是否超过阈值的确定来控制发电机的离线或在线状态。

公开(公告)号：US20140254053A1

公开(公告)日：2014-09-11

申请号：US14355449

申请日：2011-11-01

申请人： Jianping Wang ,  Jiuping Pan ,  Reynaldo Nuqui

发明人： Jianping Wang ,  Jiuping Pan ,  Reynaldo Nuqui

IPC分类号： G01R31/08 ,  H02H7/26

CPC分类号： G01R31/088 ,  G01R31/085 ,  H02H7/265

摘要： An improved method of fault detection in a high-voltage direct current (HVDC) power transmission line is provided. The fault detection is based on fault-induced travelling waves. The method comprises estimating an amplitude of fault-induced travelling waves at the fault location, and calculating a fault resistance (Rf) based on the estimated amplitude, an estimated pre-fault voltage at the fault location, and a surge impedance of the transmission line. The estimated fault amplitude and the estimated pre-fault voltage are calculated from voltage measurements performed at both ends of the transmission line. Further, a fault detection device is provided.

摘要翻译： 提供了一种改进的高压直流（HVDC）输电线路故障检测方法。 故障检测基于故障引起的行波。 该方法包括估计故障位置处的故障诱发的行波的振幅，以及基于估计的振幅，故障位置处的估计的故障前电压和传输线的浪涌阻抗来计算故障电阻（Rf） 。 估计的故障振幅和估计的故障前电压由传输线两端执行的电压测量计算。 此外，提供故障检测装置。

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：US20120092904A1

公开(公告)日：2012-04-19

申请号：US13085949

申请日：2011-04-13

申请人： Reynaldo NUQUI ,  Jiuping PAN ,  Kailash SRIVASTAVA ,  Tomas JONSSON

发明人： Reynaldo NUQUI ,  Jiuping PAN ,  Kailash SRIVASTAVA ,  Tomas JONSSON

IPC分类号： H02J3/36

CPC分类号： H02J3/36 ,  G06F1/26 ,  H02H7/125 ,  H02J13/0062 ,  Y02E60/60 ,  Y02E60/7838 ,  Y04S40/124

摘要： Multi-terminal HVDC systems and control methods therefore are disclosed. Methods for controlling multi-terminal HVDC systems having a plurality of converter stations may include receiving a plurality of measurements from a plurality of measurement units disposed on the HVDC system, identifying from the measurements a disruption within the HVDC system, monitoring the measurements to identify a steady-state disrupted condition for the HVDC system, calculating a new set point for at least one of the plurality of converter stations, which new set point may be based on the steady-state disrupted condition and the measurements, and transmitting the new set point to the at least one of the plurality of converter stations. In some examples, the HVDC systems may include an HVDC grid interconnecting the plurality of converter stations and a controller communicatively linked to the plurality of measurement units and the plurality of converter stations.

摘要翻译： 因此，公开了多端子HVDC系统和控制方法。 用于控制具有多个转换器站的多端子HVDC系统的方法可以包括从设置在HVDC系统上的多个测量单元接收多个测量值，从测量中识别HVDC系统内的中断，监视测量结果以识别 用于HVDC系统的稳态中断条件，为多个转换站中的至少一个转换站计算新的设定点，该新的设定点可以基于稳态中断条件和测量，并且传输新的设定点 到所述多个转换站中的至少一个。 在一些示例中，HVDC系统可以包括互连多个转换器站的HVDC网格和通信地链接到多个测量单元和多个转换器站的控制器。

公开(公告)号：US07203622B2

公开(公告)日：2007-04-10

申请号：US10744743

申请日：2003-12-23

申请人： Jiuping Pan ,  Reynaldo Nuqui ,  Le Tang

发明人： Jiuping Pan ,  Reynaldo Nuqui ,  Le Tang

IPC分类号： G06F11/30 ,  G06F15/00

CPC分类号： G06Q10/06 ,  H02J3/00 ,  Y04S10/54

摘要： A systematic approach is presented for the development and implementation of cost-effective transmission asset maintenance strategies. The overall concept and methodology are based on transmission reliability and risk management and address the value of preventive maintenance activities. This may help electric network utilities conduct maintenance policy assessment, region-wide criticality analysis, and optimal maintenance resource allocation and task scheduling.

摘要翻译： 介绍了开发和实施具有成本效益的传输资产维护策略的系统方法。 总体概念和方法是基于传输可靠性和风险管理，并解决预防性维护活动的价值。 这可能有助于电力公司进行维护策略评估，全区域关键性分析以及最优维护资源分配和任务调度。

公开(公告)号：US09755896B2

公开(公告)日：2017-09-05

申请号：US12472532

申请日：2009-05-27

申请人： Reynaldo Nuqui ,  Le Tang

发明人： Reynaldo Nuqui ,  Le Tang

IPC分类号： G05D17/00 ,  H04L12/24 ,  G06Q50/06 ,  H04L29/06 ,  H02H3/00 ,  H04L29/08

CPC分类号： H04L41/0813 ,  G06Q50/06 ,  H02H3/006 ,  H04L41/0803 ,  H04L63/1441 ,  H04L67/12 ,  Y04S40/24

摘要： A method is disclosed for preventing malicious settings changes to IEDs in a power transmission and distribution network. Attempted changes to the protection settings of an IED is detected and transmitted to one or more neighboring IEDs. The neighboring IEDs check for consistency of the new settings and return conformance or nonconformance signals. If a nonconformance signal is received, the attempted setting change is not allowed.

公开(公告)号：US09197068B2

公开(公告)日：2015-11-24

申请号：US13085949

申请日：2011-04-13

申请人： Reynaldo Nuqui ,  Jiuping Pan ,  Kailash Srivastava ,  Tomas Jonsson

发明人： Reynaldo Nuqui ,  Jiuping Pan ,  Kailash Srivastava ,  Tomas Jonsson

IPC分类号： H02J3/36 ,  H02H7/125 ,  G06F1/26 ,  H02J13/00

CPC分类号： H02J3/36 ,  G06F1/26 ,  H02H7/125 ,  H02J13/0062 ,  Y02E60/60 ,  Y02E60/7838 ,  Y04S40/124

摘要： Multi-terminal HVDC systems and control methods therefore are disclosed. Methods for controlling multi-terminal HVDC systems having a plurality of converter stations may include receiving a plurality of measurements from a plurality of measurement units disposed on the HVDC system, identifying from the measurements a disruption within the HVDC system, monitoring the measurements to identify a steady-state disrupted condition for the HVDC system, calculating a new set point for at least one of the plurality of converter stations, which new set point may be based on the steady-state disrupted condition and the measurements, and transmitting the new set point to the at least one of the plurality of converter stations. In some examples, the HVDC systems may include an HVDC grid interconnecting the plurality of converter stations and a controller communicatively linked to the plurality of measurement units and the plurality of converter stations.

摘要翻译： 因此，公开了多端子HVDC系统和控制方法。 用于控制具有多个转换器站的多端子HVDC系统的方法可以包括从设置在HVDC系统上的多个测量单元接收多个测量值，从测量中识别HVDC系统内的中断，监视测量结果以识别 用于HVDC系统的稳态中断条件，为多个转换站中的至少一个转换站计算新的设定点，该新的设定点可以基于稳态中断条件和测量，并且传输新的设定点 到所述多个转换站中的至少一个。 在一些示例中，HVDC系统可以包括互连多个转换器站的HVDC网格和通信地链接到多个测量单元和多个转换器站的控制器。