Adaptive active power line filter for interfacing wind-power DGs to distribution system

Harmonic disturbances caused by power electronic converters for wind-power distributed generation (DG) that may have serious impacts on the power quality of its connecting power distribution systems must be well controlled according to IEEE 1547 Standards. This paper presents a novel adaptive harmonic detection active (AHDA) filter, consisting of an industry-type power electronic inverter controlled by an adaptive noise cancellation algorithm implemented using state-of-the-art digital signal processor. This AHDA filter provides effective elimination of harmonic disturbances generated by the wind-power DG converter, owing to its efficient adaptive harmonic detection algorithm. The algorithm is based on a novel noise cancellation theory, originally not designed for power applications. This paper presents a practical formulation of the algorithm for utility applications that significantly simplifies the complex formulation originally for noise cancellations. Hardware and software implementation of the AHDA filter is detailed. Simulation and experimental results are provided to demonstrate effectiveness of this filter.