A sensorless integrated doubly-fed electric alternator/active filter (IDEA) for variable speed wind energy system

In response to energy concerns and power quality issues, a viable, simple and low cost sensorless integrated doubly-fed electric alternator/active filter (IDEA) for variable wind energy conversion system (WECS) is proposed. The proposed IDEA is capable of simultaneous generation of optimized green power and improving power quality, which are achieved by canceling the most significant and troublesome harmonics of the utility lines. Power factor correction and reactive power control are the other two significant features of the proposed technology. A sensorless field oriented method to control the IDEA with higher power density is also part of this development. Analysis and simulation as well as experimental results are presented to demonstrate the effectiveness of the proposed IDEA. The overall algorithm has been implemented using the TI DSP controller, TMS320LF2407.