SLP optimization-based voltage profile improvement in unbalanced distribution networks

Abstract

Because of their advantages, active distribution networks implement renewable energy resources (RERs) such as photovoltaic units and wind turbines. However, there may be some drawbacks due to the intermittent nature of RERs, such as voltage fluctuations and increased system losses. This paper presents an optimization process that is solved by sequential linear programming to improve the voltage profile of the distribution network. The proposed optimization method is applied to a modified IEEE 34 Bus Test system. The method optimizes the voltage deviations by changing the taps of the voltage regulators and the reactive power injected by the inverters of the PV systems. The voltage profiles of the base case and optimal case are compared at different hours of the day with varying active and reactive loads and PV outputs. Simulation results done by MATLAB show that the proposed approach can provide a better voltage profile.