发明名称 |
SCHALTKREIS ZUM SCHUTZ VOR WIRKLASTVERSCHIEBUNG UND VERFAHREN DAZU. |
摘要 |
<p>A method for sensing real load unbalance in an electrical power system having at least two clock based power sources (10, 12) which are connected for parallel operation combines a real load difference current signal, proportional to the difference in real load currents in corresponding phases of the power sources, with a phase angle signal which is, proportional to the phase difference between an external clock signal and an internal clock signal of one of the power sources, to produce an error signal. When this error signal exceeds a predetermined threshold level, a trip signal is produced to indicate that an excessive real load unbalance situation exists.</p> |
申请公布号 |
DE3785340(T2) |
申请公布日期 |
1993.07.15 |
申请号 |
DE19873785340T |
申请日期 |
1987.11.30 |
申请人 |
SUNDSTRAND CORP., ROCKFORD, ILL., US |
发明人 |
BAKER, DONAL EUGENE, ELIDA OHIO 45807, US;BEG, MIRZA AKMAL, ELIDA OHIO 45805, US |
分类号 |
H02H7/122;H02H7/06;H02J3/38;(IPC1-7):H02H7/06;H02H3/48 |
主分类号 |
H02H7/122 |
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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