Research On Transaction Decision-making Of New Energy In A Complex Power Market Environment

It is a significant method to achieve the “3060” dual-carbon goal that building a new type of power system mainly based on new energy.Simultaneously,with the continuous acceleration of the era of de-subsidy of new energy and the process of marketization,intermittent new energy sources represented by wind power and photovoltaic still have consumption and absorption problems.How new energy can optimize the transaction decision-making of the complex power market environment,increase the utilization of clean energy,while facilitate the efficient national allocation of energy is a brand new problem in the current market.Therefore,this article conducts research on the market trading strategy of new energy stations.The main research content is as follows:First of all,the trading characteristics of new energy in different market environments are sorted out.In the current-intraday power market environment,there is a multi-time and multispace coupling between the inter-provincial power spot trading and the auxiliary service market.This paper suggests a framework for the function of the two-tier electricity market based on an analysis of the market mechanism and clarifies the process for organising transactions.At the meanwhile,in view of the current situation of new energy trading in the medium and long-term electricity market,the trading varieties of the medium and long-term electricity market were introduced in detail,and the coupling relationship between the green certificates and the electricity energy market under the renewable energy quota system was analyzed,laying a theoretical foundation for the construction of the model.Secondly,an optimization model for the decision-making of new energy electricity sales in the inter-provincial-intra-provincial power market environment is constructed.With consideration of the compatibility characteristics of the electricity energy market and the ancillary services market,in view of the optimal decision-making of new energy stations in the two-level power market,multiple prediction scenarios are formed based on the probability model of prediction error,the impact of the uncertainty of new energy output on power sales decisions at sites,the conditional risk-value method is used to control the income risk of the station,and a two-layer optimization model for new energy power sales decision-making is constructed.The results show that the model can not only avoid the benefits’ risks caused by uncertainty,but also provide auxiliary decisionmaking for the inter-provincial power trading plan of new energy stations.Finally,a decision-making model for new energy transactions considering joint ventures with thermal power in the medium-and long-term power market environment is constructed.In view of the market advantages of different power generation entities in medium-and long-term power transactions,a coupling system of new energy and thermal power is formed to realize the complementary advantages of the two.Based on the fluctuation characteristics of the new energy output,the minimum installed capacity of the supporting thermal power is determined.On the premise of meeting the constraints of safe and stable operation of the units and market transactions,the optimization models of market transactions between the new energy and thermal power independent/cooperative operation are constructed and compared,taking into account the power and green certificate income,wind and light abandonment and standby costs respectively.The results show that the coupled output of new energy and thermal power is more stable and controllable and the overall efficiency has improved,which is conducive to the coordinated development of regional energy.