Based On Cooperative Game Compensation Benefit Allocation And Contract Electricity Decomposition Of Water-Wind-PV Multi-Energy Complementary Base

With a new round of Energy Revolution,the new-type power system and trading market are being gradually improved,forming the operation mode of multi-energy complementarity and the trading mode of "medium and long-term contracts as major,spot market as supplement".China’s southwest region has excellent resource endowment,but it is limited by the large-scale grid connection of new energy,hydropower’s abundant and low characteristics,outgoing channel capacity restrictions,grid security margins etc.,resulting in serious abandonment of wind and PV and water problems.For Yalong River water-wind-PV clean energy base operation faces the problem of uncoordinated benefit allocation and incomplete trading strategy for bundled outgoing transmission,it should adopt the measures of multi-energy benefit sharing and market-based incentives,to fully mobilize the energy base’s willingness to adjust the peak and the recipient grid’s willingness to purchase power,and to ensure the stability,security and economy of the energy base and grid trading by developing flexible and adaptable,reasonable and efficient compensation benefit allocation methods and contract power decomposition strategies.Therefore,the paper focuses on the multi-energy compensation relationship and medium-and long-term contract implementation strategy,and establishes a long-term multi-energy benefit allocation plan under the power market environment based on the premise of multi-energy alliance benefit allocation,the core of multi-energy complementary dispatch,and the method of contract power decomposition,as well as the medium-and long-term power contract decomposition based on the allocation plan,and achieves the following research results:(1)The study was aimed at the medium-and long-term operation of multi-energy complementary,constructing a medium-and long-term dispatch simulation-optimization model coupled with short-term new energy abandonment characteristics,and using the model to extract the scheduling rules of cascade hydropower plants.Based on the characteristics of runoff flow and low,hydropower output and new energy abandonment are quantified,and a medium-and long-term optimal scheduling model for multi-energy coupling with short-term new energy abandonment characteristics is constructed.Different operation modes are set up to compare and analyze the new energy consumption,energy base generation efficiency and operation of the terrace hydropower plants.The results show that the joint operation mode can effectively improve the new energy consumption during different periods of flow and low,and the new energy benefits of the complementary system and the total benefits of the alliance are increased by 42.42%and 13.99%respectively,indicating that the joint operation mode can effectively improve the overall benefits of the energy base.In order to promote the new energy consumption,the terraced hydropower deviates from the optimal operation process,and is affected by the time division tariff between abundant and dry periods,resulting in an increase of 7.899 billion kW·h of power generation but a decrease of 2.715 billion yuan of benefits,which both damages its own interests and increases the losses of the units,and therefore should be compensated.Through the analysis of the multi-year operation of the terrace hydropower,the joint operation of the terrace hydropower can make the water level value of each reservoir show obvious intra-year variation pattern,which verifies that the extracted scheduling rules regulate the reservoir operation process according to the incoming water characteristics.(2)To address the benefit allocation problem of multi-energy bodies jointly bundled to participate in the power market,a coalition benefit allocation scheme is formed based on the cooperative game theory,considering the different influences among the subjects.Based on the basic assumptions and allocation principles of cooperative game theory,the superiority of multienergy alliance is verified,and the allocation strategy set of cooperative game is formulated,and the allocation results of cooperative game are formed by considering the influence of each subject on the allocation results of the alliance.The following conclusions are obtained:Comparing the revenue of different operation modes of multiple power generating agents,the joint bundling of multiple energy sources to participate in the electricity market can improve the overall profit,which verifies the superiority of forming multi-energy alliances.A variety of allocation schemes in the cooperative game are used to allocate the joint operation returns of different subjects of energy bases,and the allocation results all satisfy super-additivity,which guarantees the feasibility of the allocation strategy.A variety of allocation schemes in the cooperative game are used to allocate the combined operating revenues of different agents of energy bases,and the allocation results all satisfy super-additivity,which guarantees the feasibility of the allocation strategy.The concept of negotiation power is introduced to quantify the influence of agents on the allocation results,and each agent chooses the allocation scheme based on individual rationality to determine the allocation ratio of water-PV-wind additional benefits of multi-energy alliance allocation results as 2.44:2.48:1.(3)In order to solve the power decomposition problem of medium-and long-term contracts connected to the spot market,a contract power decomposition method that satisfies both smoothness and fairness is proposed.Based on the principle of medium-and long-term contract decomposition,a linear model of medium-and long-term contract power decomposition is constructed by linearization method and solved by mixed integer programming method,considering the smoothness and fairness of the remaining power in the spot market and the power output of the cascade power plants.Different scenarios are set up to compare and analyze the smoothness and fairness of the contract decomposition results of the cascade hydropower plant,and the following conclusions are obtained:The decomposition results and the operation process of the cascade hydropower plant with fairness in mind can satisfy the operating constraints of the cascade hydropower plant and the margin of deviation of contract execution,which proves the solution can guarantee the smooth implementation of medium-and long-term power trading.The model decomposition results and load process correlation coefficients are all more than 0.98,which indicates that the model can effectively track the system load change pattern,smooth out the residual power in the spot market,smooth out the price fluctuations in the spot market,and facilitate the safe and stable operation of the power grid and power market.The influence of fairness factors on the contract decomposition results is demonstrated,and the fairness decomposition of the medium-and long-term power contracts of harmonized cascade power plants can be realized by setting different adjustment coefficients,which are useful to realize the optimal operation of energy base.