Optimized Dispatch Of Combined Heat And Power System Considering The Coordination Of User-Side Flexibility Resources

As the world is faced with increasingly severe energy problems and environmental problems,it has become a common consensus to concentrate on promoting the development of clean and renewable energy as well as reducing carbon emission.In order to further promote the development of clean and renewable energy,wind power,as the main representative of clean and renewable energy,has broad development and application prospects.In the “three north” regions of China,wind power units as well as combined heat and power units account for a large portion of the installed power units.In the heating seasons,on one hand,the regulation capacity of combined heat and power units are limited because they mainly operate under the “electric power being determined by heat power” mode;on the other hand,the wind power is featured with typical characteristics of reverse peaking,randomness and intermittency,therefore,the “three north” regions of China are faced with severe wind curtailment problems in the heating seasons.Aiming to alleviate the severe wind curtailment situations,to exploit the coordination potential of user-side flexibility regulation resources could play an effective role in further promoting the optimized operation as well as wind integration of the combined heat and power system.Based on this,this paper focuses on how to promote the optimized dispatch of combined heat and power system by coordinating the user-side flexibility regulation resources,the wind integration and carbon emission reduction are paid with especial research attention.Firstly,from the perspective of the user side,this paper conducts the research about the coordination mechanism of user-side flexibility regulation resources of combined heat and power system.The principle describing the coordination of the heat load elasticity of building heating users and the time-of-use demand response in promoting system wind integration as well as carbon emission redunction is analysed with emphasis.Meanwhile,the model describing the coordination mechanism of the heat load elasticity of building heating users and the time-of-use demand response is established on the user side.Secondly,in order to promote the wind integration and the operation economy of the system,an optimized dispatch model of combined heat and power system considering the coordination of user-side flexibility regulation resources is established in this paper.The heat load elasticity of building heating users and the time-of-use demand response are coordinated to increase the operation flexibility of the combined heat and power system,therefore the wind integration and the operation economy of the system could be promoted.The simulation results verify the effectiveness of the established model.Finally,in order to promote the reduction of carbon emission and the low-carbon and economic operation of the system,an optimized dispatch model of combined heat and power system considering the coordination of user-side flexibility regulation resources based on carbon trading is established in this paper.The carbon trading is considered in the dispatch model of combined heat and power system,meanwhile,the heat load elasticity of building heating users and the time-of-use demand response are coordinated to promote the reduction of carbon emission as well as the low-carbon and economic operation of the system.The simulation results demonstrate the validity of the established model and method.