Unbalanced Voltage Compensation of Grid Integrated PV System with Fuzzy based Novel Seven Level Inverter

摘要

This paper describes a novel 7 level converter based PV grid integration during unbalanced grid condition. The proposed 7 level converter can reduce no. of power electronic devices required and power consumption also. The distorted components of +ve and -ve sequences are regulating by controlling the power injected by the PV in to grid to maintain voltage under balance. A fuzzy based controller is used to control the PV inverter. The combination of multi-level converter with fuzzy controller can reduce the voltage stresses and switching losses of devices. The proposed fuzzy logic controller (FLC) can reduces the time delays compared with proportional plus resonant controller during the dynamic conditions. The proposed 7 level converter with fuzzy controller reduces filtering requirements it can improves system performance to a greater extent.