POWER SYSTEM OPERATION STATE DETECTING SYSTEM AND POWER SYSTEM OPERATION STATE DETECTING METHOD

摘要

PPROBLEM TO BE SOLVED: To quickly and accurately get the transient stability of a power system. PSOLUTION: A power system operation state detecting system, which detects the operation when a power system having a generator, a transformer, a bus, a transmission line, etc., transmits power to another power system through a transmission line from a generator, is equipped with: a meter which meters active power P and reactive power Q generated from a generator; and a judger which judges whether the phase difference angle of the back voltage of the synchronous reactance of a generator to the voltage of other power systems continues to enlarge after occurrence of an accident, based on the metering results which show the values of P and Q and the detection results which show that an accident has occurred in the power system, so as to detect the operation state of the power system. The judger judges that the phase difference angle continues to enlarge when P is at or over a first value and besides Q is at or under a second value determined based on the first value. PCOPYRIGHT: (C)2007,JPO&INPIT