Inverter excited induction machine for high performance wind power generation system

This paper investigates new system configuration of induction generator for wind power generation. Proposed system realizes the variable speed generation with small capacity of inverter by using PFC converter with a diode rectifier and a boost chopper as the active power converter. The inverter supplies the reactive power only for the induction generator. The reduction of the capacity of the inverter leads to the lower system cost. It is also advantageous that the dc side of the rectifier is connected to the dc transmission line and the dc battery charger to reduce the total cost by omitting the inverter to connect to the utility system. Simulation results show that the capacity of the inverter is reduced to almost 1/5 of full rating. It is also shown that the duty factor of the boost chopper of the PFC converter can control the active power of the PFC converter and the inverter simultaneously.