Abstract:

Micro energy grid can provide multiple types of energy such as cold,heat,and electricity,making it possible to integrate and dispatch the various kinds of energy resources.Exergy analysis shows the efficiency of different types of energy in two aspects of quantity and quality.Based on the exergy theory on the basis of the second law of thermodynamics,this paper analysed exergy of the whole system and then established a micro energy grid scheduling model with exergy efficiency maximization as the optimization goal in order to improve energy utilization,and solve the model with particle swarm optimization algorithm.Using an example to verify the proposed optimization scheduling model can reveal the utilization of energy accurately,and realize the transformation of energy evaluation index from quantity characteristic to quality characteristic.

Key words: micro energy grid, energy utilization rate, efficiency, optimal dispatch, particle swarm optimization