Apparatus and method for measuring impedance of power system, and apparatus and method for improving power factor of power system

摘要

Provided are a power system impedance measuring apparatus and method, and a power system power factor improving apparatus and method capable of realizing synchronization including a difference in communication delay time by a simple method. A power system impedance measuring device equipped with a power factor improvement device capable of controlling impedance in the power system, and obtaining a plurality of measured electricity quantities via a communication line and measuring the power system impedance. The power factor improvement control unit that changes and controls the impedance in the power system using the power factor improvement device, and the phase that estimates the phase shift time from the waveform change accompanying the impedance change control for the plurality of obtained electric quantities Using a shift timing estimation calculation unit, a phase shift calculation unit that performs time adjustment of a plurality of electric quantities using the obtained phase-shifted times for a plurality of obtained electric quantities as the same time, and a plurality of electric quantities after the time adjustment And an impedance estimation calculation unit for estimating the impedance of the power system.