Determining the Optimal Capacities of Distributed Generators Installed in A Stand-alone Microgrid Power System

Abstract

-In recent years, the power demand has been increasing steadily and the occurrence of maximum power demand has been moving from the summer season to the winter season in Korea. And since the control of electric power supply and demand is more important under those situations, a micro-grid system began to emerge as a keyword for the sTable operation of electric power system. A micro-gird power system is composed of various kinds of distributed generators(DG) such as small diesel generator, wind turbine, photo-voltaic generator and energy storage system(ESS). This paper introduces a method to determine the optimal capacities of the distributed generators which are installed in a stand-alone type of microgrid power system based on the fundamental proportion of diesel generator. At first, the fundamental proportion of diesel generator will be determined by changing from 0 to 50 percent. And then we will optimize the capacities of renewable energy resources and ESS according to load patterns. Lastly, after recalculating the capacity of ESS with consideration for SOC constraints, the optimal capacities of distributed generators will be decided.

Comparative study on the economic feasibility of nanogrid and microgrid electrification: The case of Jeju Island, South Korea

“…30 In addition, interest in microgrids is also high in South Korea. 31,32 The Korea Smart Grid Association, Korea Electrotechnology Research Institute, and others are trying to foster microgrid-related industries. In particular, Daegu Metropolitan City is pushing forward the nation’s first block-type microgrid project in the National Industrial Complex.…”