Research On Modeling Control And Efficacy Of CCP System Coupled With Wind Energy

In recent years,the integrated energy system has received great attention and development in the energy field.The system can not only save the use of fossil energy and improve the absorption capacity of renewable energy,but also realize the cascade utilization of energy by coupling different energy types with different energy conversion equipment and improve the energy utilization rate of the system.However,the development of integrated energy system technology is also facing more and more challenges.For example,the optimized operation and safety control technology of the system cannot fully meet the operating requirements of the system,and the introduced wind power system cannot completely suppress the impact on the existing system and so on.Based on a company’s self-built energy island system,this paper builds a combined cooling and power system suitable for summer conditions,and introduces a wind power system into the system.In order to maximize the use of wind energy,this paper designs the maximum wind energy tracking strategy that can control the generator speed.Simultaneously,the generator-side converter and the grid-side converter respectively design the zero-d-axis current control strategy and the directional vector control strategy.It ensures the smooth operation of the system and solve the problems of strong randomness and frequent fluctuations in wind power output,and the simulation results verify the effectiveness of the control strategy.This paper defines the primary energy utilization ratio and exergy efficiency of the combined cooling and power system coupled with wind power based on the laws of thermodynamics to evaluate the thermal performance of the system.The results show that the primary energy utilization rate and exergy efficiency of the system studied in this paper have reached 109% and 31%,respectively.This paper also uses single-factor sensitivity analysis to explore the influence trend of the cooling water and chilled water inlet temperature changes in absorption refrigeration units and ground source heat pump units on the primary energy utilization ratio and exergy efficiency of the system.The degree of influence of the above parameters on the system performance is determined through orthogonal experiments,and the results show that the chilled water inlet temperature of the absorption refrigeration unit has the greatest influence on the system performance.This paper uses regression orthogonal test to obtain the regression equations of energy utilization ratio,exergy efficiency and chilled water inlet temperature in two refrigeration units,which provides mathematical guidance for system operation optimization.