Wide-range Operation of dc Microgrid with coordinated control

Recently, Major academic and practical issue of the power system is the Smartgrid. Major term in Advanced Distribution Operation is the Microgrid. In terms of distribution network, the Microgrid is a removable and controllable component that includes the power sources and the loads simultaneously. In general, currently prevalent power sources and loads have DC I/O Interface, so DC Microgrid has several advantages. Many types of units in Microgrid make the control of system more complex and that complexity makes system unstable. Then the proper coordinated control is essential. Due to the inherence, DC Microgrid has only two control object, one is voltage and the other is active power. This paper defines operation mode of DC Microgrid with several DC sources and suggests economic and efficient coordinated control methods. Simulation with PSCAD proves effectiveness.