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    • 2. 发明公开
    • 디지털 보호계전장치
    • 数字保护继电器系统
    • KR1020020027273A
    • 2002-04-13
    • KR1020010061469
    • 2001-10-05
    • 가부시끼가이샤 도시바
    • 스기우라히데아키슈토이츠오이토하치다이사가마사미치
    • H02H3/02
    • H02H7/261H02H1/0061H02H3/28
    • PURPOSE: A digital protective relay system is provided to be capable of making sampling timing the same among plural protective relay devices which operate independent from each other by using a signal from a GPS satellite. CONSTITUTION: A GPS(Global Positioning System) receiver(5a,5b) outputs a fixed cycle pulse(S0) at the same timing, received from a GPS satellite(4). On the other hand, clock signal generating sections(6a,6b) output clock signals(S1a,S1b), respectively. Timing difference measuring section(7a) measures the timing difference of the fixed cycle pulse(S0) and a sampling pulse(S2a). Sampling pulse(S2a) is output by sampling pulse generating section(9a). Similarly, a timing difference measuring section(7b) measures the timing difference of the fixed cycle pulse(S0) and a sampling pulse(S2b). Sampling pulse(S2b) is output by sampling pulse generating section(9b). A correcting sections(8a,8b) respectively correct the frequency of sampling pulse(S2a,S2b) so that the timing difference measured through timing difference measuring sections(7a,7b) is substantially zero.
    • 目的:提供一种数字保护继电器系统,能够通过使用来自GPS卫星的信号使彼此独立工作的多个保护继电器装置之间的采样定时相同。 构成:GPS(全球定位系统)接收机(5a,5b)从GPS卫星(4)接收的相同定时输出固定周期脉冲(S0)。 另一方面,时钟信号生成部(6a,6b)分别输出时钟信号(S1a,S1b)。 定时差测量部(7a)测量固定周期脉冲(S0)和采样脉冲(S2a)的定时差。 采样脉冲(S2a)由采样脉冲发生部分(9a)输出。 类似地,定时差测量部分(7b)测量固定周期脉冲(S0)和采样脉冲(S2b)的定时差。 采样脉冲(S2b)由采样脉冲发生部分(9b)输出。 校正部分(8a,8b)分别校正采样脉冲的频率(S2a,S2b),使得通过定时差测量部分(7a,7b)测量的定时差基本为零。