Coordinated and Optimal Voltage Control in Active Distribution Networks using Fuzzy Logic and Backtracking Search Algorithm

Abstract

With progressively increasing distributed generation (DGs) connections, the transfer of power has been transformed into an active distribution system in the distribution network and it is no more unidirectional. The relationship between the DGs in distribution channels has created the distribution service providers with a bidirectional power flow obstacle. A tolerable voltage level of the system is the key technical hurdle for an active distribution network. These voltage regulation schemes can be divided into decentralized and centralized voltage controls. There are three voltage control methods implemented and compared in this paper to test the effectiveness and limitations of the control methods by performing simulations using the DigSilent Power Factory software. Throughout this study, the three decentralized voltage control strategies are assembled using fuzzy logic by taking into account load bus voltages and DG power as inputs and voltage control behaviors as outputs. The coordinated and optimal voltage control methods are implemented on the IEEE 13 bus and 69 bus test systems. From the results obtained, the voltage deviations in both the test systems tested has shown that the BSA technique has resulted in lower voltage deviation compared to using PSO.