UTILITY VOLTAGE AND POWER FACTOR COMPENSATION DEVICE IN DOUBLY-FED INDUCTION GENERATING SYSTEM

摘要

PURPOSE: A system voltage in a wound type induction development system and a power factor corrector are provided to stabilize a system voltage and a power factor by compensating a voltage and a current in a transmission line which connects a wound type induction development system to a system. CONSTITUTION: A switch element(93) controls the power flow between a transmission line and a DC capacitor. A controller(95) controls the switching operation of the switch element according to the size of the voltage and the current of the transmission line. A first PT(Potential Transformer)(40) measures a voltage which is applied between the switch element and the transmission line and offers it to the controller. A first CT(Current Transformer)(70) measures a current which flows between the switch element and the transmission line and offers it to the controller. A second PT(50) measures a voltage which is applied to the transmission line and offers it to the controller.