New conceptual high efficiency sinewave PV power conditioner with partially-tracked dual mode step-up DC-DC converter

This paper presents a novel circuit topology of a high efficiency single-phase sinewave PV power conditioner. This power conditioner is composed of time-sharing sinewave absolute pulse width modulated boost chopper with a bypass diode in the first power processing stage and time-sharing sinewave pulse width modulated full-bridge inverter in the second power processing stage operated by time-sharing dual mode pulse pattern control scheme. Its unique operating principle of two power processing stage with time-sharing dual mode sinewave modulation scheme is described with a design example. This paper also proposes a sinewave tracking voltage controlled soft switching PWM boost chopper with a passive auxiliary edge-resonant snubber. The new conceptual operating principle of this novel single-phase sinewave power conditioner related to solar photovoltaic generation system is presented and discussed through the experimental results.