The distributed control of autonomous microgrid based on voltage

A distributed control strategy to balance the active and reactive power of autonomous microgrid is given out. The solution is base on node voltage regulation. An active source whose active power is controllable will regulate its node voltage through the output of its active power, which can maintain the long tern voltage level of microgrid. The short term voltage level is maintained by storage sources through active power they inject into the grid, while one of them will operate in the voltage source mode, which keep the magnitude and phase of its node voltage unchanged to balance the reactive power requirements. The clean sources, whose outputs of active power are generally uncontrollable, will inject all their energy absorbed from the outside world. The distributed control of charge and discharge of storage sources, is conducted by adjusting their voltage set points to be inverse ratio to their level of energy storage. The distributed control schema, along with unit control of different kind of micro sources, is verified by simulation performed under SIMULINK platform.