JPS6460229A - Reactive power controller - Google Patents

Abstract

PURPOSE:To control reactive power efficiently, by detecting the scale and the power flow of the reactive power passing a bus line communicating breaker, at the time of parallel operation, and by controlling capacitors for correcting the reactive power of each bus line, with the reactive power and the reactive power of each current side system connected to each bus line. CONSTITUTION:Reactive power passing reactive power converters 6, 7 for detecting the reactive power and a bus line communicating breaker 8 is detected by a reactive power converter 14. In case that there is power flow, if the direction is of an arrow head A, arithmetic is performed on the sum component of reactive power data VAR 1 and VAR 3, and the advance or delay is discriminated. In case of the delay, capacitor breakers 12-1-12-n are made, and in case of the advance, they are tripped. At the same time, arithmetic is performed on a difference component between reactive power data VAR 2 and the VAR 3, and the advance or delay is discriminated. In case of the delay, capacitor breakers 13-1-13-n are made, and in case of the advance, they are tripped.