Implementation and performance of cooperative control of shunt active filters for harmonic damping throughout a power distribution system

TLDR

In a real distribution system, changing configurations and the presence of shunt capacitors and loads can cause independent control of active filters to produce unbalanced compensating currents. The study proposes cooperative control of multiple active filters, using voltage detection, to damp harmonics across the distribution system. The authors implement the cooperative control algorithm in both hardware and software for two active filters, coordinating them via voltage measurements. Experimental results confirm that the cooperative control, supported by a communication system, effectively damps harmonics.

Abstract

This paper proposes cooperative control of multiple active filters based on voltage detection for harmonic damping throughout a power distribution system. The arrangement of a real distribution system would be changed according to system operation, and/or fault conditions. In addition, shunt capacitors and loads are individually connected to, or disconnected from, the distribution system. Independent control might make multiple active filters produce unbalanced compensating currents. This paper presents hardware and software implementations of cooperative control for two active filters. Experiment results verify the effectiveness of the cooperative control with the help of a communication system.