Toward Optimal Multi-Microgrid Design and Operation for Enhancing Supply-Security and Reliability

The objective of this study is to assess the optimal design and operational strategy for multi-microgrids (MMGs) within an active distribution network, with the aim of enhancing supply security and reliability. In accordance with this perspec- tive, the paper introduces a three-layer coordinated operational planning framework for MMG planning. This framework con- siders various elements, including distributed generation (DGs) such as wind, biomass, and solar production, distributed reactive power sources (DRSs), and battery energy storage (BES).The primary goal of the provided framework is to minimize power exchange between MMGs and the anticipated energy not served, ultimately leading to an enhancement in supply security and reliability. Furthermore, the study explores the impact of conser- vation voltage reduction (CVR). To address the unpredictability of load consumption and renewable energy generation, scenario modeling was implemented. A backward scenario reduction technique was then employed to strike a balance between model accuracy and computational efficiency.To validate the proposed framework, it was implemented on an IEEE 33 bus distribution system. Comparative analysis against conventional planning schemes revealed a significant improvement, with a 58.37% reduction in supply exchange between MMGs and a 63.91% decrease in energy not served achieved by the proposed MMG formulation.These test results underscore the superior efficacy of the proposed framework in enhancing both supply security and reliability when compared to conventional planning approaches.