考虑启动能耗的槽式光热电站日运行方式优化研究  

Daily operating mode optimization for parabolic trough concentrated solar power station by considering start-up energy consumption

作　　者：贺春光 郭伟 张顺奇 韩伟 付康丽[2] 冯鹏辉 姚明宇[2] 安佳坤 HE Chunguang;GUO Wei;ZHANG Shunqi;HAN Wei;FU Kangli;FENG Penghui;YAO Mingyu;AN Jiakun(State Grid Hebei Economic and Technological Research Institute,Shijiazhuang 050000,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]国网河北省电力有限公司经济技术研究院,河北石家庄050000 [2]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2025年第2期88-96,共9页Thermal Power Generation

基　　金：国网河北省电力有限公司科技项目(SGHEJY00GHJS2310068)。

摘　　要：由于光热电站日常启停的特点,光热电站的启动能耗较大。为此,建立了50MW槽式光热电站的准稳态模型,提出了通过夜间低负荷运行替代光热电站启停过程的日运行优化方式,通过理论推导获得了临界停机时间指标,即优化运行方式和常规运行方式发电量相同时的机组停机时间,并以此作为判断使用优化运行方式能否增加发电量的条件。结果表明:在4个典型气象日下,随着光热电站在低负荷时的发电功率从额定功率的25%降至10%,机组使用优化运行方式的全日额外发电量增加了16.3~26.3 MW·h;随着储热系统的初始储热时长从0增至3.0h,光热电站的全日额外发电量可以增加7.3~8.1MW·h;光热电站在低负荷发电功率为额定功率的15%时,其临界停机时间为14.0 h,在机组的实际停机时间低于临界停机时间时,使用优化运行方式才能降低能耗;对光热电站进行全年生产模拟,使用优化运行方式可使其全年发电量增加0.9%。The start-up energy consumption of parabolic trough concentrated solar power(PTCSP)systems is high due to the characteristics of their daily start-up and shut-down processes.To reduce this energy consumption,quasi-steady state models for a 50 MW PTCSP are established,and a daily optimal operating mode is proposed by replacing the start-up and shut-down processes with low-load operation.The critical shut-down time is derived theoretically to determine whether the optimal operating mode could reduce energy consumption.The results show that,the daily accumulated electricity production of a PTCSP can be improved by 16.3~26.3 MW·h with the optimal operating mode when the electricity production decreases from 25%to 10%of the rated production under low-load condition.When the initial energy storage duration in the thermal energy storage system increases from 0 to 3.0 h,the daily accumulated electricity production of the PTCSP system can be improved by 7.2~8.1 MW·h.Additionally,the critical shut-down time of the PTCSP system is 14.0 h when the load is 15%of the rated electricity production under low-load operating conditions.The start-up energy consumption of the PTCSP system with the optimal operating mode can be reduced when the practical shut-down time is shorter than the critical shut-down time.The annual electricity production of the PTCSP system can be increased by 0.9%with the optimal operating mode.

关 键 词：太阳能热发电 启动能耗 运行优化 临界停机时间 

分 类 号：TM615[电气工程—电力系统及自动化]