Optimal voltage control in interconnected power distribution systems by a self-adaptive fuzzy logic controller

The high penetration of distributed generation (DG) is changing the energy flows in the grid, as well as the energy losses and voltage profile of the system. To solve these problems, the impact of the connection of Renewable Energy Generators (REGs) on the grid is being studied. This work is intended to present the voltage variation of each node of the distribution grid before and after the insertion of a wind turbine or solar panel and the combination of both. The proposed method is self-adaptive regulation by combining settings in P/Q or P/V mode with a setpoint decision making block (setpoint adaptation block) based on fuzzy logic in order to maintain a stable and optimal voltage profile.The simulation results obtained using Matlab®/Simulink® clearly show the efficiency of the controllers used and their optimal control capacity.