{"title":"与 S-CO2 储能循环耦合的燃煤机组协调控制策略和动态特性","authors":"Di Wang , Xinrui Han , Long Si , Yu Zhou","doi":"10.1016/j.apenergy.2024.123812","DOIUrl":null,"url":null,"abstract":"<div><p>To ensure the safety of supply in the power grid, it is necessary to establish a power generation system with flexible regulation. This study proposes an innovative system coupling coal-fired units with a S-CO<sub>2</sub> energy storage cycle to improve the overall load regulation capability. First, a dynamic mathematical model of the coupled coal-fired power units and S-CO<sub>2</sub> energy storage cycle is established. The relative error associated with the model is found to be less than 5%. Then, the two operating conditions of the load up process and the load down process are combined, and the dynamic characteristics of the S-CO<sub>2</sub> energy storage cycle are studied and reported. The results highlighted that heating the boiler and supplying air can reduce the coal consumption rate by 2.29 g/(kW·h). Finally, a new coordinated control strategy based on mode switching and dual control is designed and implemented. The experiment conducted showed that the coordinated control strategy based on the dual control yielded the best performance, with the fastest response speed to the load command. Additionally, this control approach has the smallest integration value of the absolute error index and time squared error. Overall, the findings of this study provide useful information and serve as a reference for improving the flexibility of coal-fired power generation units.</p></div>","PeriodicalId":246,"journal":{"name":"Applied Energy","volume":null,"pages":null},"PeriodicalIF":10.1000,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A coordinated control strategy and dynamic characteristics of coal-fired units coupled with the S-CO2 energy storage cycle\",\"authors\":\"Di Wang , Xinrui Han , Long Si , Yu Zhou\",\"doi\":\"10.1016/j.apenergy.2024.123812\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To ensure the safety of supply in the power grid, it is necessary to establish a power generation system with flexible regulation. This study proposes an innovative system coupling coal-fired units with a S-CO<sub>2</sub> energy storage cycle to improve the overall load regulation capability. First, a dynamic mathematical model of the coupled coal-fired power units and S-CO<sub>2</sub> energy storage cycle is established. The relative error associated with the model is found to be less than 5%. Then, the two operating conditions of the load up process and the load down process are combined, and the dynamic characteristics of the S-CO<sub>2</sub> energy storage cycle are studied and reported. The results highlighted that heating the boiler and supplying air can reduce the coal consumption rate by 2.29 g/(kW·h). Finally, a new coordinated control strategy based on mode switching and dual control is designed and implemented. The experiment conducted showed that the coordinated control strategy based on the dual control yielded the best performance, with the fastest response speed to the load command. Additionally, this control approach has the smallest integration value of the absolute error index and time squared error. Overall, the findings of this study provide useful information and serve as a reference for improving the flexibility of coal-fired power generation units.</p></div>\",\"PeriodicalId\":246,\"journal\":{\"name\":\"Applied Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.1000,\"publicationDate\":\"2024-07-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Energy\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0306261924011954\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306261924011954","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
A coordinated control strategy and dynamic characteristics of coal-fired units coupled with the S-CO2 energy storage cycle
To ensure the safety of supply in the power grid, it is necessary to establish a power generation system with flexible regulation. This study proposes an innovative system coupling coal-fired units with a S-CO2 energy storage cycle to improve the overall load regulation capability. First, a dynamic mathematical model of the coupled coal-fired power units and S-CO2 energy storage cycle is established. The relative error associated with the model is found to be less than 5%. Then, the two operating conditions of the load up process and the load down process are combined, and the dynamic characteristics of the S-CO2 energy storage cycle are studied and reported. The results highlighted that heating the boiler and supplying air can reduce the coal consumption rate by 2.29 g/(kW·h). Finally, a new coordinated control strategy based on mode switching and dual control is designed and implemented. The experiment conducted showed that the coordinated control strategy based on the dual control yielded the best performance, with the fastest response speed to the load command. Additionally, this control approach has the smallest integration value of the absolute error index and time squared error. Overall, the findings of this study provide useful information and serve as a reference for improving the flexibility of coal-fired power generation units.
期刊介绍:
Applied Energy serves as a platform for sharing innovations, research, development, and demonstrations in energy conversion, conservation, and sustainable energy systems. The journal covers topics such as optimal energy resource use, environmental pollutant mitigation, and energy process analysis. It welcomes original papers, review articles, technical notes, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gap between research, development, and implementation. The journal addresses a wide spectrum of topics, including fossil and renewable energy technologies, energy economics, and environmental impacts. Applied Energy also explores modeling and forecasting, conservation strategies, and the social and economic implications of energy policies, including climate change mitigation. It is complemented by the open-access journal Advances in Applied Energy.