Impact Analysis of Distributed Generation on Voltage Stability in Radial Distribution Systems

The growing interest in mass integration of distributed generation (DG) raises new challenges in power systems operation and planning strategies. The DG units deployment in distribution networks affects their behavior and performance, leading to additional concerns regarding the voltage stability. Two indexes named Voltage Vulnerability Index (VVI) and Sensitivity of Voltage Vulnerability Index (SVVI) are developed in this paper for voltage stability evaluation and DG impact assessment on distribution networks. The proposed analysis procedure has been applied on IEEE 33- bus radial system. Additional to the voltage profile improvement, the power losses reduction is also evaluated during the study.