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    METHOD OF DETERMINING VOLTAGE STABILITY MARGIN FOR LOAD SHEDDING WITHIN AN ELECTRICAL POWER SYSTEM
    1.
    发明申请
    METHOD OF DETERMINING VOLTAGE STABILITY MARGIN FOR LOAD SHEDDING WITHIN AN ELECTRICAL POWER SYSTEM 有权
    确定电力系统中负载冲击电压稳定性的方法

    公开(公告)号：US20090009349A1

    公开(公告)日：2009-01-08

    申请号：US11966055

    申请日：2007-12-28

    申请人： Andrzej Wiszniewski ,  Waldemar Rebizant ,  Andrzej Klimek

    发明人： Andrzej Wiszniewski ,  Waldemar Rebizant ,  Andrzej Klimek

    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。

    METHOD OF INITIATING THE LOAD SHEDDING WITHIN AN ELECTRICAL POWER SYSTEM
    3.
    发明申请
    METHOD OF INITIATING THE LOAD SHEDDING WITHIN AN ELECTRICAL POWER SYSTEM 审中-公开
    在电力系统中启动负载冲击的方法

    公开(公告)号：US20120277929A1

    公开(公告)日：2012-11-01

    申请号：US13511138

    申请日：2009-12-02

    申请人： Andrzej Wiszniewski ,  Waldemar Rebizant ,  Andrzej Klimek

    发明人： Andrzej Wiszniewski ,  Waldemar Rebizant ,  Andrzej Klimek

    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。

    FUZZY INTERFERENCE RELAY AND METHOD FOR CURRENT DIFFERENTIAL PROTECTION OF A TRANSMISSION LINE
    4.
    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

    申请人： Waldemar Rebizant ,  Krzysztof Solak ,  Andrzej Wiszniewski ,  Andrzej Klimek

    发明人： Waldemar Rebizant ,  Krzysztof Solak ,  Andrzej Wiszniewski ,  Andrzej Klimek

    IPC分类号： H02H3/26

    CPC分类号： H02H3/307 ,  H02H3/283

    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。

    METHOD OF HIGH IMPEDANCE GROUNDFAULT DETECTION FOR DIFFERENTIAL PROTECTION OF OVERHEAD TRANSMISSION LINES
    6.
    发明申请
    METHOD OF HIGH IMPEDANCE GROUNDFAULT DETECTION FOR DIFFERENTIAL PROTECTION OF OVERHEAD TRANSMISSION LINES 审中-公开
    高阻抗地基传感器差分保护方法

    公开(公告)号：US20120330582A1

    公开(公告)日：2012-12-27

    申请号：US13499635

    申请日：2009-09-30

    申请人： Andrzej Wiszniewski ,  Miroslaw Lukowicz ,  Marek Michalik ,  Andrzej Klimek

    发明人： Andrzej Wiszniewski ,  Miroslaw Lukowicz ,  Marek Michalik ,  Andrzej Klimek

    IPC分类号： G01R31/14 ,  G06F19/00

    CPC分类号： H02H3/307 ,  H02H3/402

    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）