Research On Decision-making Of Electricity Purchase And Sale In The Electricity Market With The Participation Of Renewable Energy

With the rapid development of renewable energy and the electricity market reform,the roles and trading behaviors of all kinds of traders in the electricity market have changed.However,the corresponding model of electricity procurement and sale strategies and trading mechanism have not been adjusted in time.It has been a very important reason for hindering the development of renewable energy.Therefore,it is necessary to solve this kind of problem.This paper mainly studies the electricity procurement and sale strategies for traders considering renewable energy participation under different scenarios.Based users’ preference,the third chapter establishes a Stackelberg game model among traditional power retailer,island hybrid renewable energy system(IHRES)and multiple users to study the.procurement and sale strategies.The existence of non-cooperative game equilibrium of the retail side and the unique global optimal solution of the user side is proved,and the Stackelberg game equilibrium is obtained.The results show that the pricing strategies of the two types of e-commerce sellers show opposite trend with the change of users’ preference.In addition,with the improvement of users’ preference,it can effectively promote the consumption of renewable energy in the electricity market.The fourth chapter focuses on the electricity retailer with renewable energy power generation in the electricity market.A multi-objective bi-level stochastic optimization model is established to study the decision of electricity retailer considering the influence of disutility of user.The uncertainty of spot market price and renewable energy generation are also taken into account.The upper model aims at maximizing the profit of the retailer,and the lower model aims at minimizing the cost of electricity consumption and disutility of users.The simulation results show that DR can effectively balance the load in each time period of a day,and the consideration of disutility avoids the load peak-valley transfer.In different scenarios,energy storage equipment and self-generated renewable energy power have significantly increased the revenue of electricity retailer.The fifth chapter designs an energy trading mechanism based on auction mechanism and Stackelberg game theory for the power ancillary service market of renewable energy trading.A non-cooperative game model is established to describe competition relationship among traders.A two-stage Stackelberg game model between main grid operators and traders is established study the optimal decision.It is proved that there is a unique equilibrium trading price in the market,and the supply and demand in the market reach equilibrium under the equilibrium trading price.Finally,a numerical example is given to verify the effectiveness of the model.