发明名称 |
Ground fault current limiter and method of limiting ground fault current |
摘要 |
A ground fault current limiter, in which reactors are connected in series to a neutral point for compensating for capacitances to ground of a power switches capable of turning ON/OFF at a high speed are connected in parallel with respective reactors, occurrence of a ground fault is detected from a phase difference between a zero-phase sequence current and a zero-phase sequence voltage at time of sampling, an optimal compensation quantity of capacitances to ground is computed based on the zero-phase sequence current and the zero-phase sequence voltage at time of occurrence of a ground fault, and ON/OFF of the switches are controlled thereby to alter the reactor quantity so as to correspond to the compensation quantity.
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申请公布号 |
US5699219(A) |
申请公布日期 |
1997.12.16 |
申请号 |
US19950441928 |
申请日期 |
1995.05.16 |
申请人 |
HITACHI, LTD;CHUBU ELECTRIC POWER CO., INC. |
发明人 |
ARITA, HIROSHI;KIDA, JUNZO;MATSUI, YOSHIAKI;YAMAGIWA, TOKIO;SUGIMOTO, SHIGEYUKI;NEO, SADANORI |
分类号 |
H02H3/34;H02H3/38;H02H9/08;(IPC1-7):H02H9/08 |
主分类号 |
H02H3/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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