Reactive Power and Voltage Optimization under High Penetration of Distributed Generations and EVs

Abstract

With the consumption of fossil energy and the deterioration of the environment, both distributed generation (DGs) including photovoltaic (PVs) and electric vehicles (EVs) have ushered in a period of rapid development. However, the DG’s randomness, intermittency, and large-scale EV charging have brought challenges to the safety and economy of the distribution network (DN). This paper comprehensively considers the impact of large-scale EVs and DGs of high penetration on the DN, establishing reactive power and voltage optimization model for minimizing the network loss and voltage deviation by regulating the energy storage (ES) and voltage adjusting devices including on-load tap changer (OLTC), capacitors banks (CB), and static var compensator (SVC). Next, the proposed model is simplified by the method of variable substitution, second-order cone programming (SOCP), and linearization. Finally, the validity of the model is verified by the IEEE 33-node simulation.