Reliability improvement of future microgrid with mixed load models by optimal dispatch of DGs

摘要

This paper presents a novel dispatch strategy of distributed generators (DGs) in microgrid for reliability improvement. Energy index of reliability is considered for improvement along with minimization of system losses, system voltage deviation, and cost of DGs. These objectives depend on many criteria like price of DG power, renewable DG power availability, and system loading. The dispatch strategy is developed using bat optimization algorithm. The proposed algorithm is implemented for four seasons: winter, spring, summer, and autumn. For each season, hourly optimal schedules are obtained while maintaining reliability and optimizing objectives. Further, the proposed algorithm is tested for future load enhancement and future price of renewable DGs. The effect of the future load and renewable DG price changes on optimal DG dispatch is tested with IEEE 33 bus distribution system having mixed loads like industrial, residential, and commercial. The feasibility and benefits of the proposed technique are demonstrated with obtained results.