Optimal Reactive Power Dispatch Through Minimization of Real Power Loss and Voltage Deviation

Optimal reactive power dispatch plays an important role to reduce the total active power losses in transmission lines and the total voltage deviation at the load buses. Optimal reactive power dispatch is a nonlinear, nonconvex, non differentiable, and multimodal optimization problem with discrete and continuous control variables. In this paper, the interface between MATLAB and DigSILENT PowerFactory software has been realized to solve the optimal reactive power dispatch problem. The power flow calculation has been executed on DigSILENT PowerFactory software, and the process of optimization through Genetic Algorithm has been implemented on MATLAB. The proposed approach has been tested on standard IEEE 30 bus system. The results obtained by the proposed approach has been compared with results presented in the literature.