Research On Optimal Dispatching Of Multi-energy Microgrid Based On Flexible Load Coordination

With the increase of population and the rapid development of industrial manufacturing,the demand for energy is increasing day by day.In response to the concept of sustainable development,it is urgent to build a low-carbon and efficient renewable energy system.The proportion of distributed energy and flexible load in microgrid is expanding,which poses a new challenge to the scheduling of microgrid.Aiming at the problem of source load imbalance in multi-energy microgrid,this paper analyzes the operation characteristics of each unit in multienergy microgrid,studies the flexible load response characteristics based on incentive mechanism,and establishes the coordinated scheduling strategy of multi-energy microgrid based on flexible load coordination.The main research contents of this paper are as follows(1)Multi-energy microgrid architecture and modeling.A multi-energy system established in this paper includes wind power generation,photovoltaic power generation,electric boiler,P2 G device,electric storage device,heat storage device and gas storage device.The working principle and operation characteristics of each unit are analyzed,and a mathematical model is established.The load is divided into rigid load and flexible load according to the response characteristics.The analysis of each unit model is not only helpful to optimize the structure of multi-energy system,but also provides theoretical support for further research.(2)Analysis of flexible load response characteristics based on incentive mechanism.The flexible load mathematical model is established to study the flexible load price response and the flexible load incentive response.The price response is optimized on the basis of the existing time-sharing price to guide the user to adjust the energy consumption time and change the load curve.the flexible load response model is established through the synergy of the above two responses.the objective function is established with the highest user economy and maximum comfort.the multi-objective function is transformed into a single objective function according to the fuzzy optimization theory.the simulation results show that the flexible load incentive mechanism can guide the user to use energy reasonably,smooth the load curve and reduce the user’s energy cost,and verify the validity of the model.(3)Multi-energy microgrid optimization scheduling strategy based on flexible load coordination.In traditional multi-energy microgrid scheduling,flexible load is usually ignored as a schedulable resource.In this chapter,flexible load is introduced to participate in the scheduling of multi-energy microgrids.The mathematical model with the lowest operating cost of multi-energy microgrids in the park is established.Considering the constraints of electric energy,heat energy,gas energy balance and user comfort,three scheduling schemes are set up and solved by improving particle swarm optimization algorithm.The simulation results show that flexible load participation in dispatching can reduce the energy interaction between multienergy microgrid and power grid,reduce the operation cost of the park,verify the effectiveness of the model,and provide a reference for large-scale renewable energy grid connection and flexible load resources participation in dispatching.