CRITICAL LOADING BASED VOLTAGE STABILITY ASSESSMENT OF POWER SYSTEMS WITH SOLAR PHOTOVOLTAIC PENETRATION

This paper presents assessment of voltage stability of power systems in terms of critical loading with real and reactive power penetration from solar PV generation system. The impact on voltage stability in power systems has been investigated with solar PV generator integration at weak load buses. Continuation load flow analysis has been used to obtain critical loading limit, which is used as a parameter for assessment of voltage stability of the system. The analysis has been carried out for identification of load buses and selection of load bus for solar PV placement. Effect of increasing penetration with real and reactive power injection through solar PV generator have been studied. IEEE 14 bus and IEEE 25 bus test systems were used for simulation study. MATLAB based power system analysis toolbox (PSAT) has been used for voltage stability analysis. Effects of solar PV integration with weak load buses on static voltage stability of the system are investigated.