Optimal Voltage Control Method for Unbalanced Distribution System with PV and Phevs Using Artificial Bee Colony Algorithm


The penetration of photovoltaic (PV) systems has been increased worldwide. The output power generation of photovoltaic (PV) has an intermittent nature due to cloud transients. Consequently, distributed PV systems with their intermittent feature can seriously affect the voltage regulation in distribution systems. In this paper, an optimal voltage control (OVC) method for unbalanced distribution networks (UDNs) with PV and plug-in hybrid electric vehicles (PHVs) is proposed. In this paper, a method is proposed to mitigate voltage fluctuations due to PV by simultaneously optimizing the reactive power of the PV inverters and charging/discharging power of the plug-in hybrid electric vehicles (PHEV). This OVC method considers different types and configurations of voltage regulators, and three-phase and single-phase step voltage regulators (SVRs). The use of this new objective yields a high reduction in the voltage fluctuations. The artificial bee colony (ABC) algorithm is utilized to optimally solve the real-time optimization problem while considering the constraints of the distribution system, PV inverters, and PHEVs. The simulation results on the 33-bus distribution system demonstrate the effectiveness of the proposed method for mitigating the voltage fluctuations during a high fluctuating generation profile of PV.

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