Research On Wind-Water-Thermal Power Plant Income Distribution Based On Cooperative Game In Market Environment

With the increasing demand of power users for electricity and the increasingly stringent government supervision of the environment,how to develop a sustainable and environment-friendly power system is particularly important.At the same time,the unprecedented openness of the power market gives more possibilities to the generation side,and each power plant tends to seek more benefits in the dispatching process on the premise of ensuring the balance of supply and demand and satisfying its own constraints.The traditional dispatching model neglects the profitability of power plants and fails to accurately describe the market behavior of power plants in dispatching.In summary,considering the market behavior of each power plant in dispatching,it is particularly important to study the contribution of each power plant in the power market environment on how to construct a dispatching model that is suitable for the current openness and takes into account the benefits of the power plant.Firstly,according to the competitive relationship of wind,water and thermal power plants in dispatching and the pursuit of interests,a non-cooperative game dispatching model is established,which aims at the profit of power plants.The existence of Nash equilibrium solution of the model is demonstrated and the solution method is designed,and its basic role for cooperative game is pointed out.Secondly,under the guidance of cooperative game theory,wind,water and thermal power constitute a big alliance to expect more revenue and redistribute the revenue.Taking one of the three small alliances as an example,the existence of equilibrium solution is proved and the solution method is given,and the influence of season and wind power utilization ratio on the model is verfied.Thirdly,considering the uncertainty of wind power,the robust optimization method is used to deal with the uncertainty of wind power.The game model is updated and the existence of equilibrium solution is proved.The natural conservativeness of robust optimization ensures that the cooperative game theory can still bring more benefits to power plants under the worst wind power output.Finally,numerical simulation is carried out by an example to simulate the influence of season and different wind power accesses on the model.The results show that the proposed Nash equilibrium solution can be applied to solve the model.Cooperative game can improve the utilization rate of wind power and the benefits of power plants.The limitation of wind power utilization rate is that the model is closer to the actual operation.Finally,considering the uncertainty of wind power,power plants can get more benefits through the proposed method.