| 摘要 |
PROBLEM TO BE SOLVED: To detect severe accident occurring at a remote end correctly at the local end of a generator. SOLUTION: The severe accident detector comprises a first judgment means for taking out variation rate of at least one of the terminal voltage Ea and the power factor angleθof the generator G at the local end of a generator G, and judging whether the variation rate exceeded first set values E1,θ1 corresponding to occurrence of severe accident or not; and a second judgment means for further taking out variation rate of at least one of the terminal voltage Ea and the power factor angleθof the generator G when the variation rate exceeded the first set values E1,θ1, and judging whether the variation rate exceeded second set values corresponding to removal of severe accident or not. COPYRIGHT: (C)2007,JPO&INPIT
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