VOLTAGE CONTROL METHOD AND VOLTAGE CONTROLLER

• Main Authors: OI KAZUNOBU, BABA HISAKAZU, MUNESHIMA MASAKAZU, TSUTSUMI HIROHIKO, YAMAMOTO YASUHIRO
• Format: Patent
• Language: English
• Published: 14.05.2009
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a voltage control method and a voltage controller which suppress steady strain and oscillation of a load voltage at self-sustaining operation, which are caused by disturbance near a resonance frequency of an AC filter. SOLUTION: In the voltage controller in which an inverter 4 is connected to a load 5 side through the AC filter 3 constituted by an LC or an LCL using a coil L and a capacitor C, a value of an output current of the inverter 4 is detected as a detected current value of the inverter, the detected current value of the inverter is differentiated, a primary lag is applied to the detected current value of the inverter, and then the detected current value is added to a voltage command value. COPYRIGHT: (C)2009,JPO&INPIT