Modified p-q theory based control of solar PV integrated UPQC-S

Abstract

This paper proposes a modified p-q theory based control of solar photovoltaic array integrated unified power quality conditioner (PV-UPQC-S). The fundamental frequency positive sequence (FFPS) voltages are extracted using generalized cascaded delay signal cancellation (GCDSC) which is used in p-q theory based control to generate reference grid currents for the shunt compensator. The solar PV (SPV) array integrated at the DC-bus of the UPQC, provides a part of active load power. The series VSC operates such that it shares a part of the reactive power of the load even under nominal grid conditions. The dynamic performance of proposed system is verified by simulating it in Matlab-Simulink using a combination of linear and non-linear load.