A NEW FILTER-BANK CONFIGURATION FOR HARMONIC MEASUREMENT

In this paper a new adaptive filter-bank structure suitable for the ac curate harmonic measurement in power supply systems is presented. This adaptive measurement technique is based on the resonator-in-a-loop fi lter-bank structure and includes a new modified Gauss-Newton Gradient algorithm. Using this filter-bank structure and a least-squared error approximation method, simulation results are presented to establish th e performance of the technique. The effects of time-varying fundamenta l frequency are also investigated using this filter-bank structure. Si mulation results show that the fundamental frequency can be tracked wi th very small error. The technique is also successfully applied to a m easured voltage signal sampled from the mains to demonstrate performan ce.