Analysis of bidirectional PWM converter for application of residential solar air conditioning system

In conventional solar air conditioning systems, the diode rectifier is used to build up DC link voltage from an AC utility source. The diode rectifier is simple and cheap but the reversal of power flow cannot be made. It can derate the utilization of solar cells and there problems of low power factor and harmonics at the AC input side have also occurred. Hence, in addition to peak power cutting in summer, some advantages can be obtained by adopting PWM power converters in solar air conditioners. As a result, the characteristics of the PWM power converter, such as low distorted current waveform and unity power factor are obtained. The proposed system is also verified by examining the dynamics of the PV power system to step load change as well as power reversal testing.