Research On The Optimal And Coordinated Operation Of Wind,photovoltaic And Storage Of Photothermal Power Station Based On Game Theory

With global warming and deep adjustments in the energy landscape,building a clean,low-carbon,safe and efficient new type of power system mainly based on renewable energy will be an inevitable trend in the development of the future energy system.It also puts forward urgent requirements for exploring high proportion of new energy consumption,safe and stable operation of the power system,and low-carbon and efficient utilization of new energy.However,the phenomenon of wind and solar power generation being abandoned due to intermittent and fluctuating characteristics is severe.By configuring photothermal power station and energy storage,flexible scheduling and maximum consumption of wind and solar resources can be achieved.Therefore,the best solution currently is to build a multi-energy complementary energy system.Photothermal power generation combines low-carbon power generation and efficient energy storage,and can consume renewable energy through "renewable energy consumption of renewable energy".However,its current development is limited by its own high power generation costs and market compensation mechanisms.How to further explore the complementary characteristics of multiple energy sources and study the optimization operation strategy of multiple energy alliances is of great significance for improving the profits of various new energy power plants and low-carbon operation of the multi energy system.Therefore,this thesis studies the coordinated and optimal operation of wind,photovoltaic and energy storage multi-energy systems with photothermal power station.(1)Aiming at the problem that it is difficult to reasonably quantify the complementary benefits of multi-energy complementary power generation systems,based on the concept of credible capacity and the principle of equal reliability,a method for evaluating the complementary benefits of large-scale new energy power generation grid connection is proposed.Firstly,the output mathematical models of wind power,photovoltaic power,and photothermal power generation are established,and then the output probability model of the joint system is established based on monte carlo.Secondly,the basic characteristics of credible capacity and complementary benefit evaluation indicators are described in detail.Considering the impact of the coordinated operation relationship between photothermal,wind,and photovoltaic power sources on system reliability and complementarity,the complementary benefit evaluation of multi-source power generation systems is achieved.Finally,an example is given to verify the effectiveness of the method.The results show that this method can effectively evaluate the complementary benefits of wind and photovoltaic power combined systems with photothermal power station.(2)Aiming at the problem of profit maximization and the lack of coordination mechanism in the optimal operation mode in which multiple energy subjects participate in decision-making,this thesis puts forward an optimal operation model of wind,photovoltaic,and storage cooperation game with photothermal power station.We have constructed a multi energy system with photothermal,wind power,photovoltaic,and hydrogen storage power plants as the main components,with a revenue oriented approach.Photothermal,wind power,photovoltaic,and hydrogen storage power plants form an alliance,comprehensively considering the maximization of the economic benefits of the joint system,as well as the power balance of the system and the output constraints of each unit.We use cooperative game theory to construct an optimization model,expect to receive more benefits and allocate the additional benefits obtained by the alliance.The effectiveness of the model is verified by a numerical example.The results show that the joint operation of the photothermal power station and the new energy hydrogen production device can effectively improve the wind and solar energy absorption capacity of the system,reduce the peak shaving pressure of conventional units,and improve the economic benefits of the power grid;When using cooperative game mode,the profits of each power station participant are higher than when using non cooperative game mode.(3)Aiming at the uncertainty of wind power and photovoltaic output in the multi-energy coordinated and optimized operation system,a robust optimization method was used to deal with the uncertainty of wind power and photovoltaic output.Robust factors are introduced into the cooperative game model to handle the uncertain constraint conditions,and the cooperative game model is optimized.Finally,the validity of the model is verified by taking Jiuquan area in Gansu province as an example.The analysis shows that,photothermal power station has flexible regulation,can adapt to the operation requirements of the system under different levels of stability requirements,and can ensure that the system can still operate safely under the worst case of uncertain variables.In the most robust wind and photovoltaic output scenarios,the alliance of photothermal,wind power,photovoltaic,and hydrogen storage power stations can still increase profits.Compared to the benefits in non cooperative game scenarios,the benefits obtained by using cooperative game with multiple complementary systems are higher,which can fully leverage the characteristics of cooperative game and promote the green development and reliable operation of new energy joint systems.