公开(公告)号：WO2011038757A1

公开(公告)日：2011-04-07

申请号：PCT/EP2009/062669

申请日：2009-09-30

Applicant: AREVA T&D UK LIMITED ,  WISZNIEWSKI, Andrzej ,  LUKOWICZ, Miroslaw ,  MICHALIK, Marek ,  KLIMEK, Andrzej

Inventor： WISZNIEWSKI, Andrzej ,  LUKOWICZ, Miroslaw ,  MICHALIK, Marek ,  KLIMEK, Andrzej

IPC: H02H3/30 ,  H02H3/40

CPC classification number: H02H3/307 ,  H02H3/402

Abstract: 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); B 0 = the total line admittance.

Abstract translation: 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）在预失电状态下： - 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; - 通过以下等式计算差分导纳（IV）：（公式（V））。 带（VI）：线路保护的正序阻抗。 2）运行状态： - 测量差动电流（VII）; - 测量继电器位置的相电压（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，如果下列公式被验证：（XII）与（XIII）; B0 =总线路导纳。