Multi-Objective Energy Management Approach Considering Energy Storages in Distribution Networks with Respect to Voltage Security

摘要

The presence of electrical energy storage (EES) units in distribution systems has potentials to improve the network profiles (e.g. bus voltage and branch current profiles) as well as to reduce operational cost and power losses. This paper presents a novel approach to determine the optimal charging/discharging schedule of EES units in distribution systems by employing multi-objective optimization methods, aiming at reducing operation cost and enhancing radial distribution networks security. In this regard, a voltage stability index (VSI) to improve the radial network security is presented as a separate objective function. In order to assess effectiveness and applicability of the proposed method, it is applied to a 33-bus IEEE standard distribution test system and then the obtained results are compared with existing methodologies.