Operation Optimization Model Of Multi-Energy Joint Power Generation In Market Environment

Under the strategic layout of China’s commitment to building a new energy system and a new power system,large-scale and high-proportion renewable energy is booming,which promotes the continuous optimization of power supply structure.The development goal of "3060" further defines the optimization direction of power supply structure.However,the power system gradually shows some problems in the process of development,such as low comprehensive utilization efficiency,insufficient complementary effect of various types of power sources,and so on.Therefore,scholars at home and abroad have carried out relevant research on how to operate more cleanly and economically,and how to allocate power resources more safely and efficiently.Currently,the operation mode of multi-energy joint power generation has been widely recognized both in theory and in practice.It optimizes the power dispatching results through the overall allocation of various types of power resources to improve the utilization efficiency of power generation resources.Nevert heless,under the background of the continuous deepening reform of the electricity market and the increasingly stringent energy and environmental policies,the operation strategy optimization and business model design of the joint power generationoperation mode need to be further studied.In order to promote the implementation of multi-energy joint power generation operation mode,it is of great theoretical and practical significance to study the influence of multi-type market environment on joint power generation operation mode and analyze the optimization direction of operation strategy.Therefore,this paper focuses on the key scientific issues of the optimization of multienergy joint power generation operation mode under the market environment,and takes the power generation operation model as the basic model framework to construct operation optimization models under different market implementation conditions.The impact of energy and environmental policies on the joint operation mode is analyzed,the role of ancillary service market in promoting the sustainable operation of the joint operation mode is discussed,and the optimization effect of multi-market coupling is explored.The details are as follows:(1)On the basis of the classical power generation operation model,a multi-energy joint power generation operation model considering the day-ahead electric energy market is constructed to build a model framework for follow-up research.First of all,based on the current situation of power structure in China,this paper selects the joint operation of wind power,photovoltaic,and thermal power as the representative scene.Then under the day ahead power dispatching system,through the analysis of the output characteristics of wind power,photovoltaic,and thermal power,the classical joint generation operation model is constructed by using the theory of unit commitment and economic dispatching.Finally,the main contents of the current new round of power market reform in China are summarized,and the power generation income accounting functions of two different transaction types of coal-fired thermal power generation under the mechanism of gradual and orderly liberalization of power generation plan are established according to the rules of electric energy trading.Furthermore,a multi-energy joint power generation operation model based on day-ahead market trading is constructed,which can provide method support and theoretical framework for the follow-up research and analysis of this paper.(2)In order to explore the effects of different energy and environmental policies on the joint operation mode,carbon emissions trading market and renewable portfolio standards are introduced into the basic operation model constructed in the previous chapter.Firstly,the accounting models of carbon emissions trading cost and the tradable green certificate cost are built by using the method of time series data prediction.Secondly,the joint operation models considering the implementation of carbon emissions trading market and renewable portfolio standards are applied to two regional power systems with different renewable energy endowments,and the changes of implementation effect and the optimization direction of operation strategy are compared.Finally,the operation strategy is optimized into the balance of economy,environment and reliability to construct a multiobjective optimization model.The effectiveness and applicability of the optimization strategy are verified by case study.(3)In order to ensure the sustainability of the joint operation model,not only the operation strategy should be optimized,but also the ancillary service market should be introduced to coordinate the benefit distribution of the participants.Firstly,the transaction types and rules of the domestic and foreign ancillary service market are summarized,and the corresponding market transaction model is constructed by taking the deep peak regulation and reserve capacity ancillary service market as examples.Then,on the premise of evaluating the interests of the participants,a two-stage optimization model of joint operation considering the balance of multi-agent interests is constructed.The first stage is mainly the benefit distribution within the power producers,and the second stage is the benefit distribution between the power producers and the power transmission companies.Finally,after verifying the feasibility of the operation optimization strategy,a two-stage optimization model of joint operation considering the ancillary service market is further constructed.The results show that the cooperation of the ancillary service market and the operation strategy considering the balance of interests can promote the balanced distribution of interests among the participants in the joint operation system on the premise that the consumption level of renewable energy will not be affected as much as possible.It makes the system operate continuously and effectively and has a good promotion prospect.(4)The day-ahead energy trading market,carbon emissions trading market and ancillary service market are brought into the joint operation system at the same time,and the impact of the coupling implementation of different markets on the operation model is analyzed.Firstly,a joint operation optimization model considering the coupling of electricity and carbon emissions trading market is constructed under the day-ahead dispatching system.On the basis of discussing the implementation effect of market coupling,the impact of th e policy of deepening the reform of coal-fired thermal power ongrid price on the optimization model is further explored,and the potential factors affecting the synergy between multi-markets are analyzed.Secondly,evaluate the changing trend of energy and environmental policies and the electricity market,use the scenario analysis method to explore the influence of the adjustment of market parameters on the joint operation optimization model,and give more specific adjustment guidance through the effect comparison.Finally,based on the full-text research,this paper puts forward some policy recommodations to promote the coordinated development of multi-markets and ensure the low-carbon,efficient and sustainable operation of joint operation mode.