Studies on operation modes for the first outdoor microgrid test bed in Taiwan

Development of microgrid is one of the solutions for keeping the power system intact to embed the distributed generations while considering renewable energies for substantial environment. This paper investigates the operation modes for the first outdoor microgrid test bed in Taiwan, whose generation capacity is 517.5-kW. The distributed generations in the microgrid system, which has 18 AC buses and 4 DC buses, include gas turbine, wind-turbine, PV and battery. The models of rectifier, booster and inverter are considered for both transient and dynamic simulations. The operation modes (power flow and voltage-frequency) are studied for both conditions of grid-tied and islanding operations. Preliminary simulation results reveal that proper operation modes for gas-turbine generations are crucial while other distributed generations are operated in the power mode.