A novel PV power conditioner operating under time-sharing sinewave tracking boost chopper-fed inverter and its extended bidirectional topology

This paper presents a new conceptual circuit topology of a high efficiency single-phase sinewave PV power conditioner with a compact intermediate film capacitor DC link stage. It consists of time-sharing partial sinewave absolute pulse width modulated boost chopper with auxiliary bypass diode in the first power processing stage and time-sharing partial sinewave pulse width modulated polarity changing full-bridge inverter in the second power processing stage operated by timesharing dual mode pulse pattern control scheme. Its unique operating principle of two power processing stages with timesharing dual mode sinewave modulation scheme is described with a design example. The operating principle of the novel single-phase sinewave power conditioner for the solar photovoltaic generation system is presented and discussed through the experimental results together with its control processing. Furthermore, the extended bidirectional power conditioner delivered from this proposed unidirectional power conditioner is described for battery / electric double layer capacitor (EDLC) charging and discharging applications.