Development of Community Energy Management System for Mae Hong Son District: Grid-connected Mode

摘要

This paper proposes a decentralized dispatch strategy suitable to microgrid in Mae Hong Son (MHS) district. The design of MHS microgrid is motivated by the fact that MHS is a remote area in Thailand where it has been facing with power system’s service interruption several times a year, due to natural disasters. Nonetheless, there are renewable energy resources such as mini-hydro and solar power plants inside the area that can sufficiently supply the local electricity demand most of the times throughout a year. Here, Community Energy Management System (CEMS) which minimizes the combined total economic and emission costs during grid-connected mode, while distinctly ensures smooth transition to a reliable microgrid during islanding mode, by properly utilizing battery energy storage system (BESS) and water reserve, has been developed. The proposed formulation of the day-ahead schedulings of mini-hydro generation and BESS is solved using mixed-integer linear programming (MILP). The simulated test results for one week, both during dry and rainy seasons, confirm that CEMS can significantly improve reliability of MHS microgrid with the designed feature of smooth transition to islanding mode.