Optimal Allocation of Combined DG and Capacitor Units for Voltage Stability Enhancement

Due to high penetration of distributed generation (DG) in distribution networks, transmission networks are no longer responsible solely for security issues in low-voltage distribution networks. DG units may also participate in security as well as power generation depending on their locations. In this paper, stability of Distribution system is studied based on voltage stability analysis as a security measure. Basic load flow is carried out on the well known 33- bus radial distribution network using forward backward sweep algorithm in MATLAB and voltage stability indices have been calculated. A priority list of DG and capacitor unit allocation for minimization of losses and improvement in voltage magnitude will be evaluated by evolutionary search algorithm i.e. Genetic Algorithm.