A new scheme for three-phase PWM converter without AC voltage sensor

The paper present an optimal robust waveform controller using H infinity optimization theory for three phase converter. in general D-Q axis synchronous frame to realizing a decoupling current control, input net voltage must be measured. To decrease the cost and control the system at ease, a news scheme for three phase PWM converter without net voltage sensor is present in this paper. The input voltages in the system are treated as a disturbance variable. H infinity optimization theory is suitable to design the waveform controller with disturbance noises of the three-phase converter. The stability and performance requirements for the converter can be expressed in terms of parallel to circle parallel to(infinity) norm of closed loop transfer and sensitivity functions and appropriate weighting functions. the controller achieves stability and performance robustness in the presence of input voltage sensorless control with H infinity optimal arithmetic. The feasibility and advantage of the control scheme is verified by simulation and experimental results.