深度调峰工况下超临界机组的干湿态转换策略研究  

Research on Dry-Wet Conversion Strategy of Supercritical Thermal Power Units Under Deep Peaking Condition

作　　者：杨正 孙亦鹏[1] 温志强[1] 程亮[1] 李战国[1] YANG Zheng;SUN Yipeng;WEN Zhiqiang;CHENG Liang;LI Zhanguo(North China Electric Power Research Institute,Xicheng District,Beijing 100045,China)

机构地区：[1]华北电力科学研究院有限责任公司,北京市西城区100045

出　　处：《发电技术》2024年第2期233-239,共7页Power Generation Technology

基　　金：国家重点研发计划项目(2022YFB4100303-3)。

摘　　要：为寻求深度调峰工况下合适的干湿态转换方式,在2台超临界机组上,采用2种不同的干湿态转换策略,对协调控制方式下的干湿态转换及其对系统稳定性的影响进行了研究。结果表明:2种策略均能够实现协调方式下的干湿态转换,可以通过转态进行进一步的深调工作;通过煤、水协同控制或给水流量控制均可实现干湿态转换,但水煤比变化情况不同;干转湿过程中,受到2种策略的影响,系统稳定性(主汽温度、主汽压力)区别明显;在湿转干过程中,2种策略下的系统都表现出良好的稳定性。To seek applicable dry-wet conversion mode in deep peaking condition,two different dry-wet conversion strategies were performed on two supercritical thermal power units to study the dry-wet conversion under coordinated control mode and its impact on the system stability.The results show that both strategies could realize the dry-wet conversion under coordinated control mode and further deep peaking could proceed via the dry-wet conversion.Moreover,the dry-wet conversion could be conducted either by cocontrol of coal and water or by feedwater control,yet the coalwater ratio varied.During the dry-to-wet process,affected by the two strategies,the system stability(the temperature and pressure of the main steam) is changed from dry state to wet state.In contrast,the system stability for both strategies is proved qualified under the conversion from wet state to dry state.

关 键 词：火电机组 深度调峰 干湿态转换 协调控制 系统稳定性 

分 类 号：TK01[动力工程及工程热物理] TM621[电气工程—电力系统及自动化]