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Optimal integration of DG and capacitors in distribution systems

This paper presents a method for optimally integrating distributed generation (DG) units and capacitors into distribution systems. The objective function of the optimization problem is minimizing real power losses. General analytical expressions are provided for determining the optimal locations and sizes of multiple DG units and capacitors. The proposed method combines the analytical expressions with an optimal power flow (OPF) algorithm. The proposed method is implemented in C++, and optimal integration of DG and capacitors for the 69-bus test system is performed. Several cases are studied, and the results show that the proposed method is efficient for simultaneously integrating multiple DG units and capacitors into distribution systems.