Peak shaving and heat supply flexibility of thermal power plants

作     者：Wang, Congyu Song, Jiwei Zhu, Lingkai Zheng, Wei Liu, Zhaozhao Lin, Chengkun 

作者机构：Shandong Univ Inst Adv Technol 17923 Jingshi Rd Jinan 250061 Peoples R China Shandong Univ Inst Thermal Sci & Technol 17923 Jingshi Rd Jinan 250061 Peoples R China State Grid Corp China Shandong Elect Power Res In 2000 Wangyue Rd Jinan 250003 Peoples R China 

出 版 物：《APPLIED THERMAL ENGINEERING》 (实用热力工程)

年 卷 期：2021年第193卷

页      面：117030-117030页

核心收录：

学科分类：0820[工学-石油与天然气工程] 080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project of Shandong Electric Power Research Institute [ZY-2020-05] 

主　　题：CHP Operation domain Flexibility Renewable energy generation Particle swarm optimization algorithm 

摘      要：The operational flexibility of thermal power plants is important to consume renewable energy generation, especially in the regions where combined heat and power (CHP) units account for a high proportion. Focusing on the relationship between peak-shaving capacity of CHP units and the consumption of renewable energy generation, the problem about operational flexibility of CHP plants is analyzed in this paper. From the perspective of entire CHP plants rather than the renovation of one CHP unit, the problem regarding the operation scheduling without cost or risk is addressed. A plant-level operation domain model is established, which can improve the operational flexibility of CHP plants. The heat and power adjustable ranges of CHP plants were obtained by particle swarm optimization. Also the CHP plant located in northern China was taken as an example. The power load downward adjustment range of four periods in the heating season are 9.21%, 20.44%, 14.09% and 5.31% respectively, compared with the entire plant actual power under the same heat load. Moreover, the operational flexibility of CHP plants can be enlarged by decreasing the pressure of heating extraction. Compared with the entire plant actual operating conditions, the consumption of renewable energy generation could be increased by 268.56 million kWh approximately and about 0.22 million tons CO2 emissions can be reduced per heating season if the reference plant operates with minimum power load constantly.