Analysis of Substation Energy Savings by Applying CVR in a Radial Unbalanced Distribution Feeder with Photovoltaic System

The rising load demands in industrial, commercial, and residential levels is the order of primary concern for Distribution System Operators (DSO). Therefore, advanced energy-efficient technologies such as Conservation Voltage Reduction (CVR) are considered to reduce the substation demand by regulating the voltage in a lower voltage regulation range (120-114)V. The ANSI voltage limits of end-user customer are maintained by incorporating PV's in the distribution network. This study aims to attain higher substation demand reduction. Therefore, smart PV inverter Volt- VAr control has been incorporated. Time series simulation has been performed in an OpenDSS environment for the daily load demands of various customers. IEEE-13 node three-phase radial unbalanced distribution network is taken for study purpose along with voltage-dependent load model. The significance of this work has been proved by a comparative analysis of various case studies to analyze the impact of CVR in combination with a smart PV inverter.