公开(公告)号：US4405966A

公开(公告)日：1983-09-20

申请号：US309549

申请日：1981-10-07

申请人： Leonardo P. Cavero

发明人： Leonardo P. Cavero

IPC分类号： H02H3/40 ,  H02H3/26 ,  H02H7/26

CPC分类号： H02H3/402

摘要： Disclosed is a system that provides protection for a high voltage transmission line. The system employs improved polarizing and operating signals for both a phase selector relay and a distance measuring relay. The improved polarizing and operating signals provide an accurate out-of-phase relationship during the presence of normal conditions existing on a high voltage transmission line and an in-phase relationship during the presence of fault or abnormal conditions existing on the high voltage transmission line. The accurate phase relationships are utilized by phase comparator circuits of each of the phase selector and distance measuring relays to obtain desired operating characteristics for each relay. In another embodiment, the desired operating characteristics of the phase selector and distance measuring relays are obtained by an amplitude comparator circuit. In a still further embodiment, the distance measuring relay is operated under the control of the phase selector relay so as to provide the proper desired phase selection and protection of the high voltage transmission line.

摘要翻译： 公开了一种为高压输电线路提供保护的系统。 该系统为相位选择继电器和距离测量继电器采用改进的极化和操作信号。 改善的极化和操作信号在存在于高电压传输线上存在的正常条件和在高电压传输线上存在的故障或异常状况存在的同相关系期间提供精确的异相关系。 每个相位选择器和距离测量继电器的相位比较器电路利用精确的相位关系，以获得每个继电器的期望的工作特性。 在另一个实施例中，相位选择器和距离测量继电器的期望工作特性由振幅比较器电路获得。 在又一实施例中，距离测量继电器在相位选择器继电器的控制下操作，以便提供对高压输电线路的适当期望的相位选择和保护。