INVERTER CONTROL CIRCUIT AND GRID-CONNECTED INVERTER SYSTEM WITH THIS INVERTER CONTROL CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an inverter control circuit for inverter systems that is, when used in a small-scale rotary machine-type generator system, capable of stably supplying power to the system in cooperation with a rotary machine-type generator DG.;SOLUTION: The inverter control circuit A5 for PWM controlling an inverter circuit A2 includes: angular frequency difference computing means 11, 12 that compute the required angular frequency difference Δω between the angular frequency of an output voltage signal of the inverter circuit A2 and the angular frequency of a system voltage signal of a power system B from the DC voltage Ei of a DC power supply A1 and a target voltage E^* therefor; an angular frequency detection means 14 that detects the angular frequency ω₀ of the system voltage signal; a command value signal generating means 31 that generates a command value signal from a corrected angular frequency obtained by adding the angular frequency difference Δω to the angular frequency ω₀ detected by the angular frequency detection means 14; and a PWM signal generating means 32 that generates a PWM signal based on the command value signal.;COPYRIGHT: (C)2010,JPO&INPIT