Design Of Two-Part Electricity Price Mechanism For Generation Side Facing New Energy Consumption

With the normalization of China’s long-term power market operation,traditional market price formation mechanisms have gradually exposed certain problems.Both long-term fixed investment costs and short-term marginal costs of power generation enterprises are uniformly reflected by one single price,and the income is directly related to the amount of electricity traded.As a result,power generation companies are facing greater risk of loss in the current market At the same time,the Northwest region is facing a serious problem of the consumption of new energy.The current electricity price mechanism cannot reflect the difference in supply and demand in different periods of the market under the participation of new energy,and it cannot motivate power generation companies to participate in valley load regulation.Therefore,it is of great significance to study the two-part tariff on the generation side.The core content of this paper is divided into three parts.The main research contents are as follows:Previously,on the basis of the traditional market electricity price formation mechanism,considering the random and time-dependent impact of new energy output,a peak-to-valley time-of-day electricity price pricing mechanism was proposed.,the price can reflect the difference in supply and demand in different periods of the market under the mechanisms.Under the incentive of time-sharing price signals,thermal power companies are more willing to increase their participation during peak period.Meanwhile,due to the low price in the valley period.generation company is more willing to participate in the auxiliary service market to contribute to the consumption of new energy.Subsequently,considering the problem of excessive differences in energy supply and demand in different periods with new energy participation and the expectation that future flexible demand-side resources may participate in market bidding,the electricity price formation mechanism for the mid-long term market with energy storage is designed.Energy storage charges during the valley period.Considering the efficiency,power sold and purchased by the energy storage is equivalent.In the process of clearing,the constraint of equalizing the amount of charge and discharge during the peak and valley periods needs to be consideredLastly,aiming at the problem of fixed investment cost recovery,the capacity pricing mechanism based on K-means clustering is proposed First,based on the expected internal rate of return of funds,considering the differences of unit capacity investment,annual maintenance costs,and fuel prices,the thermal power units are classified based on K-means clustering theory.the cluster center unit is used as a typical unit to calculate the capacity price.After clustering,adopting uniform capacity prices for similar units can encourage generation companies to improve efficiency and reduce costs.The analysis of the calculation example shows that the two-part tariff mechanism designed by the power generation side in this paper,that is,the time-of-use pricing mechanism taking into account energy storage participation and the capacity electricity pricing mechanism based on K-means clustering,can provide an effective price signal for the market.Meanwhile,the proposed mechanism can effectively promotes the consumption of new energy,and provides reference opinions for the construction of the mid-long term market in China.