REACTIVE POWER CONTROL WITH THREE-PHASE INVERTER FOR GRID-CONNECTED PHOTOVOLTAIC SYSTEM

Abstract

In recent years, renewable energy sources have greatly affected the
structure and operation of power systems. Previously, grid-connected PV
generators using inverters were only allowed to generate active power to ensure
the utilities to adjust the voltage in the distribution grid. It is no longer optimal
for system power transmission and system stability, especially when solar power
sources with a capacity of hundreds of MWs having a role in regulating grid
voltage. Accordingly, this paper proposes a smart inverter model of a gridconnected PV system that can regulate the reactive power. We use PSCAD
software to simulate and analyze the grid-connected solar PV system. Simulation
results show the feasibility of this control model.