DEVICE FOR COMPENSATING FOR VOLTAGE FLUCTUATION OF POWER SUPPLY

摘要

PROBLEM TO BE SOLVED: To provide a power supply capable of stopping a voltage drop generated at the time of inputting a load and also capable of choosing a power supply impedance which can control a short-circuit current. SOLUTION: This device comprises a control circuit for detecting the start timing of loads 16 to 18 and a control device for controlling the thyristor gate of a static reactive power compensation device 57 comprising a capacitor, a reactor and a thyristor to take in a bus voltage at the time of usual operation, and a gate angle is controlled and a current flowing into the reactor is adjusted by a thyristor 8, thereby changing the impedance of the static reactive power compensation device 57 to adjust a voltage drop, so that the bus voltage may be controlled so as to have a constant value.