Day-ahead Energy Optimization Of Distribution Network With Microgrid

Renewable energy(RE)efficient consumption and power supply reliability are the key indicators for the safe operation of distribution network.Microgrid can play a key role in supporting the reliable operation of distribution network.With the access of RE and the mature application of power electronic equipment,with the support of energy optimization scheduling,adjacent re will be combined into a microgrid,forming the coexistence of microgrid and distribution network.The traditional optimal operation of distribution network has an inevitable impact,reactive power adjustment will give new methods and ways;the traditional distribution network optimization method considering the interests of a single subject will not be able to solve the multi-objective optimization problem considering different stakeholders.In this context,this paper establishes the optimization model of microgrid and distribution network,explores the coordinated operation between the two agents,and studies the day ahead power coordination optimization method of microgrid and distribution network.The main work of the paper is:(1)Considering the power purchase cost,electricity sales revenue,fuel cost of power generation unit,energy storage operation and maintenance cost and pollutant treatment cost,a single microgrid optimization model with the minimum economic cost and environmental cost as the objective function is established.Based on the reliable day ahead forecast data,according to the given electricity price of the distribution network,the day ahead internal dispatching scheme and the power purchase and sale power of the microgrid and distribution network are formulated Optimal economic operation of microgrid.(2)A day ahead double objective optimization model of distribution network considering economic and quality factors is proposed.By adjusting the price of distribution network and Microgrid,the micro grid is guided to participate in the regulation,and the power flow distribution of distribution network is affected to realize the economic and high-quality operation of distribution network.(3)In the case that distribution operators and Microgrid operators belong to different interest groups and there are conflicts of interest between them,based on the non cooperative game theory,the day ahead non cooperative game model of microgrid and distribution network is established,the existence of Nash equilibrium of the proposed non cooperative game model is proved,and the Nash equilibrium strategy is obtained by solving the model.Finally,the win-win situation of different stakeholders is realized.