Abstract
The asynchrony between wind/photovoltaic complementary power supply and load demand change will affect the stable operation of the microgrid. Considering the stability and economic benefits of micro grid, a multi-objective dispatching model with multi factor constraints is proposed. Firstly, considering the effective utilization of energy storage capacity, the dispatching model is solved based on multiple series exponential iterative optimization (MSIIO) with the micro-objectives of maximum revenue and load supply reliability. Secondly, the logic algorithm of utility grid connection controller is studied according to different operation scenarios in combination with peak load regulation and valley filling dispatching strategy, so that the system can work in island mode or utility grid connection mode. Finally, a virtual simulation system is used to verify the feasibility of the dispatching strategy. Comparing with particle swarm optimization and differential evolution algorithm, the results of MSIIO show that the economic benefit is increased by 4.18%, the capacity utilization rate reached 82.83%.
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