Optimization model for the operating cost reduction of DC Microgrid under real-time pricing

An optimization model with heuristic algorithmis implemented to optimize the virtual resistances of droopcontrol for the grid-connected converters of dispatchable units, such that the power flow can be regulated. The performances of the proposed strategy are evaluated by the case studies of a 12-bus 380 V DC microogrid using matlab and a 32-bus 380 V DC microgrid using a real-time digital simulator.本文提出一种结合启发式算法（heuristic algorithm）的优化模型，用于优化可调机组（dispatchable units）并网变换器（grid-connected converters）的下垂控制（droop control）虚拟阻抗，以实现潮流（power flow）的调节。随后，通过采用MATLAB的12母线380V直流微电网（DC microgrid）仿真案例，以及采用实时数字仿真器（real-time digital simulator）的32母线380V直流微电网仿真案例，对所提策略的性能进行了评估。