REACTIVE POWER COMPENSATOR

摘要

PURPOSE:To speedily and stably control the advance and delay of the reactive power according to a command by corresponding to the change of system voltage. CONSTITUTION:The compensator is provided with a self-oscillation inverter 5 supplying the reactive power to the power system, an reactive power control means 20 inputting the difference between a command value Q and a detection value Q of the reactive power and calculating an amplitude command (k) of an inverter output voltage according to the difference at its output so as to reduce the difference, and compensation means 25 to 27 including an inverter control means 21 controlling the switching element of the inverter based on this amplitude command (k) and compensating the amplitude command (k) according to the detected value VS of the system voltage. The precedence control of the amplitude command according to the change of the system voltage enables the high-speed response as well as the stable control of the reactive power control.