An Adaptive Active Power Optimal Allocation Strategy for Power Loss Minimization in Islanded Microgrids

In this paper, an adaptive active power optimal allocation strategy for minimizing power loss during power transmission in islanded microgrids is proposed. A secondary regulated variable is added to the P-f droop control as a frequency offset to regulate power output reasonably among multiple distributed generation (DG) units. The rate of change of the total power loss during power transmission is calculated. The frequency offset is adaptively generated in turn among multiple DG units according to the rate of change of power loss. Thus the power flowing through different transmission lines is optimized and the power loss is minimized. Simulation results validate the effectiveness of the proposed strategy.

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