A utility-connected residential PV system adapted a novel single-phase composite PWM voltage source inverter

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 circui...

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Bibliographic Details
Main Author: Nonaka, S.
Format: Conference Proceeding
Language:English
Subjects:
Batteries
Bridge circuits
Capacitors
Power systems
Pulse width modulation
Pulse width modulation inverters
Resonance
RLC circuits
Smoothing methods
Voltage
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Summary: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.
DOI:10.1109/WCPEC.1994.520145