| The rapid depletion of fossil fuels and the global warming caused by long-term large-scale consumption,have made the establishment of a high-proportion renewable energy power generation system an important way to solve the dual crisis of energy and environment in the future.However,renewable energy power generation is often limited by its own characteristics and power generation technology,and its short-term output shows randomness and intermittent characteristics,making the complexity of the power system frequency regulation stability problem has also increased.As the wind-CSP hybrid power generation system was established by wind and concentrating solar power(CSP),it is possible to control the charging and discharging decision of the thermal energy storage of the CSP station to provide a buffer for the short-term smooth output of the hybrid power generation System,so as to achieve the purpose of alleviating frequency regulation pressure of the system’s automatic generation control.Therefore,whether the capacity parameter configuration plan of the heat storage system is reasonable or not will directly affect the smoothing effect of the short-term output fluctuation value of the hybrid power generation system and the commissioning cost.Based on the wind-CSP hybrid power generation system operation model,this paper will construct an optimized operation strategy for the thermal storage system,establish a rolling optimization configuration model for the thermal storage capacity of the CSP station,and research work has been carried out on optimal configuration of thermal energy storage capacity of CSP stations to stabilize short-term output fluctuations of the combined system.The main work completed and the main research results obtained in this paper are as follows:(1)Studying the basic composition of the wind-CSP hybrid power generation system,and analyzing the main operating modes of the hybrid power generation system.Researching the complex energy flow characteristics and energy coupling relationship of the hybrid power generation system,a classified operation model of wind-CSP hybrid power generation system was established by taking into account the mechanism of solar field warm-up of CSP stations.(2)Based on the study of the correlation mechanism between the charging and discharging state of the thermal storage system and the output of the wind-CSP hybrid power generation system,a prospective operational strategy in TES(POSIT)for the thermal storage system that considers the prospective effect is constructed by considering the influence of short-term output fluctuations of the hybrid system during the look-ahead period on the TES charge and heat release decision at the current moment,and a quantitative evaluation index for evaluating the pros and cons of the above-mentioned strategies is proposed.Through the analysis of numerical examples of stabilizing the short-term output fluctuation value of the hybrid power generation system,the validity of the POSIT strategy proposed in this chapter is verified,and the optimal forward-looking period value of the strategy is pointed out.(3)Based on the study of the synergistic control effect of heat storage system capacity parameters in the research of optimal configuration of thermal energy storage capacity under POSIT strategy,a rolling optimization model for the thermal storage capacity of CSP stations was established by exploring the balance between economic factors and technical indicators of the thermal storage system.A numerical examples is used to obtain the optimal configuration plan for the thermal storage parameters of the thermal storage system,optimal configuration plan for the thermal storage parameters of the thermal storage system,and at the same time,the importance of the thermal storage system capacity parameters in the research on the optimal configuration of the thermal storage capacity of the CSP station is verified. |
