Title :
A utility-connected residential PV system adapted a novel single-phase composite PWM voltage source inverter
Author :
Nonaka, Sakutaro
Author_Institution :
Fac. of Eng., Kinki Univ., Fukuoka, Japan
Abstract :
An electric utility-interactive residential PV power system adapted novel single-phase composite PWM voltage source inverter (VSI) is proposed. The proposed system is equipped with PV array, battery storage, and a single-phase VSI, which has a new circuit configuration and PWM method. The VSI circuit consists of the normal single-phase bridge circuit and an additional arm. The two auxiliary self-turn-off devices of the arm avail to adopt a composite PWM control, which contributes to reduce the ripple in the AC output current. Also, the VSI has a LC series resonance circuit tuned to twice the utility frequency connected in parallel with the smoothing capacitor. The series resonance circuit absorbs the double-frequency AC components included in the DC pulsated current. Consequently, the smoothing capacitor is drastically reduced. It was found by computer simulation and experiment that the waveform of AC output current shows an ideal sine wave
Keywords :
DC-AC power convertors; PWM invertors; bridge circuits; electricity supply industry; photovoltaic power systems; power system analysis computing; power system harmonics; power system interconnection; power system measurement; resonant power convertors; secondary cells; solar cell arrays; solar cells; AC output current ripple; DC pulsated current; LC series resonance circuit; PV array; auxiliary self-turn-off devices; battery storage; computer simulation; double-frequency AC components; electric utility interconnection; experiment; output current waveform; power supply harmonics; residential PV power system; single-phase PWM VSI; single-phase bridge circuit; smoothing capacitor; voltage source inverter; Batteries; Bridge circuits; Capacitors; Power systems; Pulse width modulation; Pulse width modulation inverters; RLC circuits; Resonance; Smoothing methods; Voltage;
Conference_Titel :
Photovoltaic Energy Conversion, 1994., Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference - 1994, 1994 IEEE First World Conference on
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1460-3
DOI :
10.1109/WCPEC.1994.520145
