A Novel Algorithm for Power Flow Management in Combined AC/DC Microgrid

A Combined AC/DC microgrid is established for the efficient power flow between AC and DC loads and the sources combining the advantages of both AC and DC microgrids. The AC and DC microgrids are merged through an interlinking converter (IC). Energy storage element is also connected to the system for providing continuous power supply. In this paper a new control algorithm for the bidirectional power flow control of interlinking converter during islanding mode of combined AC/DC microgrid along with battery control is implemented. The modified droop based control strategy eliminates the use of communication links and also reduces the power conversion stages. The input to the power management strategy are the frequency of the AC microgrid and the DC bus voltage of interlinking converter. The experimental simulations are performed in MATLAB/SIMULINK and results are analyzed.