发明名称 |
INSTANTANEOUS OVERCURRENT ELEMENT FOR HEAVILY SATURATED CURRENT IN A POWER SYSTEM |
摘要 |
The instantaneous overcurrent element, used in a microprocessor-based protective relay for a power system, includes a finite impulse response filt er which generally is a cosine filter and is responsive to the current waveform from the current transformer for fault determination unless the distortion i n the current reaches a preselected threshold, at which point a peak detector circuit is used to provide the current magnitude values for fault determination. The RMS value from circuit (88) is compared against the threshold value in comparator (90).
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申请公布号 |
CA2488045(C) |
申请公布日期 |
2009.12.08 |
申请号 |
CA20032488045 |
申请日期 |
2003.05.20 |
申请人 |
SCHWEITZER ENGINEERING LABORATORIES, INC. |
发明人 |
GUZMAN-CASILLAS, ARMANDO;BENMOUYAL, GABRIEL;ZOCHOLL, STANLEY E. |
分类号 |
H02H3/02;G06F19/00;H02H1/00;H02H1/04;H02H3/00;H02H3/08 |
主分类号 |
H02H3/02 |
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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