Analysis of Flying Capacitor Multilevel Inverter Based Shunt Active Power Filter to Voltage Deregulation of Non Linear Loads

This paper main intents to present a flying capacitor multilevel inverter based shunt active power filter(APF) with Sigma-Delta modulation. A multilevel Sigma-Delta modulation(SDM) control can be applied to control power section of APF intention to reducing sensitivity to flying capacitor voltage deregulation and mending modulator performance. In these control section of APF perfect harmonic cancellation(PHC) method acting, which is capable to set neither whatever conditions of loads working. And this modulation shapes in band noise to higher frequencies, so allow a significant diminution of the filtering requirements. This paper detailed analysis & Simulation studies are carried out to the APF performance for commonly used semiconductor based loads. Keywords-flying capacitor inverter, shunt active filter, Sigma-Delta modulation, point of common coupling, semiconductor loads