Generation Investment Expansion Planning Of Generation Company For New Renewable Energy Accommodation

Electricity market environment and high shares of renewable energy sources are inevitable trends of the future development of electrical energy.In the future,the electric energy market of China will include the medium and long-term market and the spot market,with the release of the generation schedule and the marketization of resources deployment mechanism.In this context,it is important to make full use of the role of the market in resource allocation,increasing the proportion of renewable energy power generation in the power supply through market transaction.However,the large-scale access of renewable energy brings serious wind and photovoltaic power curtailment in the operation of multienergy generation system due to the intermittent and random nature of renewable energy generation.It is urgent to solve the problem of renewable energy accommodation from the perspective of generation expansion planning.Focusing on the investment expansion planning problem of power generation companies considering new renewable energy sources in the power market environment,the following research is carried out in this paper.Based on the current situation of China's power market construction,the related issues of generation investment expansion planning are studied.To delineate the research framework for the following,the system of power market suited for this paper is clarified.To solve problem of cohesion between medium and long-term market and the spot market,the notice on guaranteeing the purchasing of electricity generated by wind in full amount is included to propose the method of deterministic contract decomposition for wind,and the unified stepwise bidding model of generator in full-electric centralized electricity market is established.In view of the competition of power generation companies for power investment expansion planning in the market environment,the game theory is used to study the participants,income function and strategy of power investment expansion planning game.A bi-level programming model of generation investment expansion planning with wind farms in oligopolistic electricity market is established in this paper.Investment decisions and bidding strategies in market trading of the single investing generation company were taken in the upper level by Generation Company.The lower-level is in the charge of Power Exchange based on the bidding information of generators and consumers,simulating the day-ahead clearing in full-electric centralized electricity market.The bi-level model was formulated as a mathematical program with equilibrium constraints(MPEC)by replacing the lower level with its KKT conditions,and then the problem was linearized and solved.The rationality and effectiveness of the presented method and model are validated by numerical results.The generation investment expansion planning for wind power accommodation considering investment risk is studied.The investment risk of the generation company imposed by the rival uncertainties in investment planning game is modeled using the conditional value at risk(CVaR),and the objective function of the lower-level model is proposed within the investment risk and profit.The rationality and effectiveness of the presented method and model are validated by numerical results.