Control circuit of the power conversion circuit, system interconnection inverter system and single-phase PWM converter system using the control circuit

摘要

PROBLEM TO BE SOLVED: To provide a control circuit that can perform harmonic restraint control at a high speed and with high precision in a simple configuration and perform processing with linearity and time invariance.;SOLUTION: A control circuit 7 includes a fifth harmonic compensation section 81 that processes a single-phase current signal I with a transfer function G(s) and performs phase adjustment processing to generate a fifth harmonic compensation signal and a PWM signal generation section 77 that generates a PWM signal on the basis of the fifth harmonic compensation signal. If a transfer function indicating predetermined control processing is defined as F(s), an angular frequency of a single-phase AC fundamental wave as ω₀ and an imaginary unit as j, the transfer function G(s) is as expressed by the following Formula 1.;COPYRIGHT: (C)2013,JPO&INPIT