A shunt active filter based on voltage detection for harmonic termination of a radial power distribution line

This paper is focused on a shunt active filter based on detection of harmon ic voltages at the point of installation. The objective of the active filte r is to attenuate harmonic propagation resulting from series/parallel reson ance between capacitors for power factor correction and line inductors in a power distribution line. The active filter acts as a low resistor to the e xternal circuit for harmonic frequencies, and it is installed on the end bu s of the power distribution line, just like a 50-Ohm terminator installed o n the end terminal of a signal transmission line. Therefore, the function o f the active filter is referred to as "harmonic termination" in this paper. Experimental results obtained from a laboratory system rated at 200 V and 20 kW verify that the active filter for the purpose of harmonic termination has the capability of harmonic damping throughout the power distribution l ine.