A Coordinated Strategy for Optimal Operation of Unbalanced EDN via BESS, VVO and DSM

Abstract

Battery Energy Storage Systems (BESS) and Demand Side Management (DSM) increase the efficiency of voltage control-based optimization in an distribution systems. This work proposes an integrated operation strategy in three-phase distribution systems for loss minimization, peak reduction, and voltage/current unbalance management. For effective implementation of load management, the proposed formulation uses a load-factor improvement scheme. Towards Volt-VAR Optimization (VVO), capacitor banks, voltage regulators, and smart inverters are deployed. Active power from BESS and solar-PV modules are injected into the grid using these inverters and the remaining kVA capacity is utilized towards reactive power support. The optimization problem is applied on the IEEE 123-bus test feeder and solved using Multi-Objective Particle Swarm Optimization. The integrated method provides superior results concerning the objective function, alongside minimizing the switching stress on participating devices.