An Improved Adaptive Detection Method for Power Quality Improvement

A new adaptive detection method for harmonic selective active filter applications is proposed in this paper. This adaptive method has better convergence properties compared to common adaptive or neural network detection methods. The adaptive gains of this method can be relatively large to obtain faster convergence. The stability of the proposed method is guaranteed and its property is analyzed when compared to earlier methods. This proposed adaptive method is simple and effective in extracting fundamental and harmonic current information from load current. The extracted fundamental or harmonic currents are used as the reference signals for the power quality improvement, harmonic selective cancellation or reactive power compensation. Simulation results verify the effectiveness of this new adaptive method