A novel hybrid series active filter for power quality compensation

This paper presents a new Hybrid Series Active Filter (HSAF) for compensating voltage/current harmonic, type of loads, reactive power and damping of resonant. It is a combined system of Shunt Passive Filter (SPF) and a Series Active Filter (SAF). The integration of passive and active power filters is very important for reducing power rating of the active part. The novel SPF uses minimum component count. The principle of the SPF is to provide a high impedance at the fundamental frequency and a very low-impedance higher harmonies generated by the load, thus compensating effectively all harmonics and reactive power to improve power factor. The SAF presents high impedance during harmonics compensation what forces the harmonics to flow through the SPF and compensates the voltage harmonic and the reactive power. The control of the SAF is based on Synchronous Reference Frame (SFR) method. The simulation results are discussed, and the performance of the topology is therefore evaluated.