In this paper an auxiliary power supply
scheme using photovoltaic power generation for airconditioning
system and its novel control strategy are
proposed. The proposed auxiliary power supply system
employs a boost converter, a bidirectional power
converter and photovoltaic arrays. The boost converter
controlled by a predictive control strategy provides
maximum power track (MPT) state on the
photovoltnic(PV) arrays as well as power generation
facility function on the ac utility grid. Furthermore the
bidirectional power converter controls the power flow
balance between the loads and two different power
sources according to the condition of the load power and
the supplied power from photovoltaic arrays
output current feedforward. Furthermore the bidirectional
power converter controlled by the proposed control strategy
provides the bidirectional power flow control at the ac utility
grid with unity power factor.