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1.发明申请公开(公告)号：US20120330582A1
公开(公告)日：2012-12-27
申请号：US13499635
申请日：2009-09-30
摘要： The invention concerns a method of impedance groundfault detection for differential protection of an overhead transmission line in a three-phase high voltage electric power transmission system which comprises many lines (1,12) and many protection relays (2,4), which comprises the following steps: 1) in prefault condition: —measuring the differential current (I); —measuring the phase voltage (II) at the relay location; —measuring the phase current (III) the relay location; —calculating the differential admittance (IV), with the following equation: (formula (V)). With (VI): the positive sequence impedance of the line-protected. 2) In operating condition: —measuring the differential current (VII); —measuring the phase voltage (VIII) at the relay location; —measuring the phase current (IX) at the relay location; calculating the differential admittance (X), with the following equation: (formula (XI)); —detecting a high impedance groundfault detection, if the following formula is verified: (XII) with (XIII); B0=the total line admittance. I _ dph pre ( I ) U _ fph pre ( II ) I _ fph pre ( III ) Y _ d pre ( IV ) Y _ d pre = I _ dph pre U _ fph pre - 0.5 Z L 1 I _ fph pre ( V ) Z L 1 ( VI ) I _ dph ( VII ) U _ jph ( VIII ) I _ jph ( IX ) Y _ d ( X ) Y _ d - I _ dph U _ jph - 0.5 Z L 1 I _ jph ( XI ) abs ( Y _ dN ) > 0.75 B d ( XII ) Y _ dR = Y _ d - Y _ d pre ( XIII )
摘要翻译： 本发明涉及一种用于三相高压电力传输系统中架空输电线路的差动保护的阻抗接地故障检测方法，该系统包括许多线路（1,12）和许多保护继电器（2,4），其包括 以下步骤：1）在预失效条件下： - 测量差动电流（I）; - 测量继电器位置的相电压（II）; - 测量相电流（III）继电器位置; 用下式计算微分导纳（IV）：（式（V））。 带（VI）：线路保护的正序阻抗。 2）运行条件： - 测量差动电流（VII）; - 测量继电器位置处的相电压（VIII）; - 在继电器位置测量相电流（IX）; 用下式计算差分导纳（X）：（式（XI））; - 检测高阻抗接地故障检测，如果验证以下公式：（XII）与（XIII）; B0 =总线路导纳。 I _ dph pre（I）U _ fph pre（II）I _ fph pre（III）Y _ d pre（IV）Y _ d pre = I _ dph pre U _ fph pre-0.5Z ZL _ fph pre（V）ZL 1（VI）I _ dph（VII）U _ jph（VIII）I _ jph（IX）Y _ d（X）Y _ d - I _ dph U _ jph - 0.5 （XII）Y = d（XII）Y _ dR = Y _ d - Y _ d（XIII）
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2.发明申请公开(公告)号：US20090009349A1
公开(公告)日：2009-01-08
申请号：US11966055
申请日：2007-12-28
IPC分类号： G08B21/00
CPC分类号： H02J3/24 , Y10T307/406
摘要： A method of monitoring voltage stability within an electrical power system comprises the steps of establishing a dynamic power system stability margin based on an operating characteristic of the power system; indicating that the power system has become unstable when the dynamic power system stability margin falls below a predetermined value; and initiating dynamic load shedding and/or restoration depending on stability margin.
摘要翻译： 一种监测电力系统内的电压稳定性的方法包括以下步骤：基于电力系统的运行特性建立动态电力系统稳定裕度; 指示当动力系统稳定裕度低于预定值时，电力系统变得不稳定; 并根据稳定裕度启动动态负载脱落和/或恢复。
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3.发明申请METHOD OF PREDICTING TRANSIENT STABILITY OF A SYNCHRONOUS GENERATOR AND ASSOCIATED DEVICE 审中-公开同步发电机和相关设备的瞬态稳定性预测方法公开(公告)号：US20130041604A1
公开(公告)日：2013-02-14
申请号：US13643974
申请日：2010-04-28
CPC分类号： H02P9/105
摘要： A method of predicting transient stability of a synchronous generator and a device for implementing such a method, the device comprising measurement means and calculation means for calculating an information which indicates, before it actually happens, whether the generator slip will be greater than zero or not at the critical phase angle.
摘要翻译： 一种预测同步发电机和用于实现这种方法的装置的瞬态稳定性的方法，该装置包括测量装置和计算装置，用于计算在实际发生之前是否发电机滑差将大于零的信息 在临界相位角。
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4.发明申请公开(公告)号：US20120277929A1
公开(公告)日：2012-11-01
申请号：US13511138
申请日：2009-12-02
IPC分类号： G06F1/26
CPC分类号： H02J3/14 , Y02B70/3225 , Y04S20/222
摘要： A method of initiating the load shedding within an electrical power system comprising an electricity generator with a source impedance ZS and a load impedance ZL, characterized in that the method comprises: measuring the voltage VL at the terminal of the load impedance, calculating by means of a computer a voltage operative level VOP such that: VOP=K VC, where K is a number greater than 1 and VC is a critical voltage at the terminals of the load ZL at which the ratio ZL/ZC is equal to 1, VC depending on the difference β between the phase angle θL of the load impedance ZL and the phase angle θS of the source impedance ZS, and comparing the voltage VL with the voltage operative level VOP so that the load shedding is initiated as soon as VL is equal to VOP.
摘要翻译： 一种在包括源阻抗ZS和负载阻抗ZL的发电机的电力系统内启动负载脱落的方法，其特征在于，所述方法包括：测量负载阻抗端子处的电压VL，借助于 计算机电压工作电平VOP，使得：VOP = K VC，其中K是大于1的数字，VC是负载ZL的端子处的临界电压，在该位置，比率ZL / ZC等于1，VC取决于 关于差异 在相位角和长度之间;负载阻抗ZL的L和源极阻抗ZS的相位角; S，并且将电压VL与电压工作电平VOP进行比较，使得一旦VL等于负载开始 VOP。
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5.发明申请FUZZY INTERFERENCE RELAY AND METHOD FOR CURRENT DIFFERENTIAL PROTECTION OF A TRANSMISSION LINE 审中-公开用于传输线电流差动保护的FUZZY干扰继电器和方法公开(公告)号：US20120224287A1
公开(公告)日：2012-09-06
申请号：US13509983
申请日：2009-11-17
IPC分类号： H02H3/26
摘要： A relay for current differential protection of a transmission line, comprising: a first calculator of symmetrical sequence components of currents of each phase of the transmission line at local and remote ends of the transmission line; a second calculator of phase differences φ12 and φ012 between combinations currents i12 and i012 of the symmetrical sequence currents; a fuzzy inference system which outputs a variable y whose value is calculated according to the values of the phase differences φ12 and φ012; a third calculator which outputs a tripping signal for the control of a circuit breaker arranged on the transmission line and associated with the relay, the value of the tripping signal being calculated according to the values of the variable y and the values of the currents of each phase at the local and remote ends of the protected transmission line.
摘要翻译： 一种用于传输线路的电流差动保护的继电器，包括：传输线的本地和远端的传输线的各相的电流的对称序列分量的第一计算器; 在对称序列电流的组合电流i12和i012之间的相位差的第二计算器和12和＆phgr; 012; 一个模糊推理系统，它输出一个变量y，该变量的值根据相位差＆phgr; 12和＆phgr; 012的值计算; 第三计算器，其输出用于控制布置在传输线上并与继电器相关联的断路器的跳闸信号，跳闸信号的值根据变量y的值和每个的电流值计算 在受保护的传输线的本地和远端处的相位。
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6.发明授权Method of determining voltage stability margin for load shedding within an electrical power system 有权确定电力系统内负载脱落的电压稳定裕度的方法公开(公告)号：US07996116B2
公开(公告)日：2011-08-09
申请号：US11966055
申请日：2007-12-28
CPC分类号： H02J3/24 , Y10T307/406
摘要： A method of monitoring voltage stability within an electrical power system comprises the steps of establishing a dynamic power system stability margin based on an operating characteristic of the power system; indicating that the power system has become unstable when the dynamic power system stability margin falls below a predetermined value; and initiating dynamic load shedding and/or restoration depending on stability margin.
摘要翻译： 一种监测电力系统内的电压稳定性的方法包括以下步骤：基于电力系统的运行特性建立动态电力系统稳定裕度; 指示当动力系统稳定裕度低于预定值时，电力系统变得不稳定; 并根据稳定裕度启动动态负载脱落和/或恢复。
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公开(公告)号：US20130166493A1
公开(公告)日：2013-06-27
申请号：US13701194
申请日：2010-10-05
申请人： Xinzhou Dong , Xuyang Li , Zhiqian Bo , Ray Chatfield , Andrzej Klimek
发明人： Xinzhou Dong , Xuyang Li , Zhiqian Bo , Ray Chatfield , Andrzej Klimek
IPC分类号： G06N5/04
CPC分类号： H02H9/007 , G06N5/048 , H02H1/0092
摘要： The invention concerns a method and a system for online ferroresonance detection in a high voltage electrical distribution network. The method includes: Overflux detection (23), which acts as the start element, overflux being set if the flux is greater than a threshold for specified time duration, mode verification (26) which is to recognize the modes of the ferroresonance, a fuzzy logic method being used to discriminate the ferroresonance modes.
摘要翻译： 本发明涉及一种用于在高压配电网络中在线铁磁谐振检测的方法和系统。 该方法包括：作为起始元件的超流量检测（23），如果通量大于规定持续时间的阈值，则过流量被设定，模式验证（26）识别铁磁共振的模式，模糊 逻辑方法用于区分铁磁共振模式。
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8.发明申请公开(公告)号：US20120123708A1
公开(公告)日：2012-05-17
申请号：US13263310
申请日：2009-05-15
申请人： Xinzhou Dong , Tao Cui , Zhiqian Bo , Andrzej Klimek , Andrzej Juszczyk
发明人： Xinzhou Dong , Tao Cui , Zhiqian Bo , Andrzej Klimek , Andrzej Juszczyk
CPC分类号： G01R31/025 , G01R31/086 , G01R31/088 , H02H1/0015 , H02H3/081 , H02H3/42 , Y04S10/522
摘要： A method and a system for transient and intermittent earth fault detection and direction determination in a three-phase median voltage electric power distribution system which comprises many lines. The system comprises: sampling means wherein the residual current and residual voltage on said lines are sampled, transient direction detection means based on instantaneous power, random intermittent detection means based on intermittent change of residual current amplitude, means of integrating transient direction and random intermittent detection, and alarm means indicating maintenance personnel to check the status of one line.
摘要翻译： 一种三相中压电力配电系统瞬态和间歇接地故障检测与方向确定方法及系统，包括多条线路。 该系统包括：采样装置，其中对所述线路上的剩余电流和剩余电压进行采样，基于瞬时功率的瞬态方向检测装置，基于剩余电流振幅的间歇变化的随机间歇检测装置，瞬态方向的积分装置和随机间歇检测装置 ，报警指示维护人员检查一条线的状态。
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公开(公告)号：US09246326B2
公开(公告)日：2016-01-26
申请号：US13701194
申请日：2010-10-05
申请人： Xinzhou Dong , Xuyang Li , Zhiqian Bo , Ray Chatfield , Andrzej Klimek
发明人： Xinzhou Dong , Xuyang Li , Zhiqian Bo , Ray Chatfield , Andrzej Klimek
CPC分类号： H02H9/007 , G06N5/048 , H02H1/0092
摘要： The invention concerns a method and a system for online ferroresonance detection in a high voltage electrical distribution network. The method includes: Overflux detection (23), which acts as the start element, overflux being set if the flux is greater than a threshold for specified time duration, mode verification (26) which is to recognize the modes of the ferroresonance, a fuzzy logic method being used to discriminate the ferroresonance modes.
摘要翻译： 本发明涉及一种用于在高压配电网络中在线铁磁谐振检测的方法和系统。 该方法包括：作为起始元件的超流量检测（23），如果通量大于规定持续时间的阈值，则过流量被设定，模式验证（26）识别铁磁共振的模式，模糊 逻辑方法用于区分铁磁共振模式。
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公开(公告)号：US07723977B2
公开(公告)日：2010-05-25
申请号：US11659043
申请日：2006-03-15
申请人： James Norman Blake , Yves Doin , Cataldo Diaferia , Andrzej Klimek , Frédéric Leclerc , Farnoosh Rahmatian
发明人： James Norman Blake , Yves Doin , Cataldo Diaferia , Andrzej Klimek , Frédéric Leclerc , Farnoosh Rahmatian
CPC分类号： G01R15/247 , G01R15/142 , G01R15/242 , G01R15/246 , H01H33/027 , H02B13/0356
摘要： An optical sensor configuration contains an optical current sensor and/or an optical voltage sensor. The sensor configuration further contains a first and a second hollow member, preferably ring shaped profiles, which are together disposed to form a hollow section. The sensor configuration further includes an optical fiber of the current sensor disposed in an annular groove, the groove being disposed at the boundary surface between the first hollow member and the second hollow member, and/or an optical fiber of the voltage sensor is disposed in a recess of the second hollow member. The first hollow member has an annular recess into which the second hollow member is disposed whereas the first hollow member is an L-shaped or U-shaped ring with two legs and the recess is formed between the two legs.
摘要翻译： 光学传感器配置包含光电流传感器和/或光电压传感器。 传感器构造还包括第一和第二中空构件，优选环形轮廓，它们一起设置成形成中空部分。 传感器构造还包括设置在环形槽中的电流传感器的光纤，该槽设置在第一中空构件和第二中空构件之间的边界面处，和/或电压传感器的光纤设置在 第二中空构件的凹部。 第一中空构件具有环形凹部，第二中空构件设置在其中，而第一中空构件是具有两个腿的L形或U形环，并且在两个腿之间形成凹部。
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