Small Signal Stability Study of a Grid Connected Photovoltaic (PV) Generation Station

Abstract

This study focuses on the effect of a grid connected Photovoltaic (PV) generating station on the power system small signal stability. Firstly a working model of the hybrid system was established using Parks reference frame of a synchronous machine. The model designed is that of a single machine infinite bus system connected to a PV generating station. Then through simulation and analysis, effects of the PV generating station on the power system local mode oscillation are observed. Thus the adverse effects on the power system small signal stability due to a gird-connected generating station is shown through some calculations of the critical operating condition .The linear(Eigen value) and non -linear simulations performed on the system model was used to confirm these observations. Finally some controllers are added to our system model in an attempt to minimize the effect of disturbance, the simulation results are noted and some conclusions are drawn.