摘要
提高蒸汽参数与发展大容量机组相结合是提高常规火电厂效率及降低单位容量造价最有效的途径,因此超临界大容量机组得到迅速的发展。由于在临界参数下汽水密度相等,在超临界压力下无法维持自然循环即不能采用汽包锅炉,直流锅炉成为唯一型式。直流炉的蓄热能力比汽包炉要小得多,负荷的快速变化极易引起机前的压力波动,影响到机组协调控制系统的稳定性,对参与一次调频的负荷快速变化要求变得困难。在介绍超临界机组协调控制特性的基础上,重点对某类机组的一次调频控制策略及试验响应过程进行了详细的分析与介绍。
The most effective way to optimize the efficiency of conventional power plants and reduce the cost of per unit capacity is to improve the steam parameters combined with the development of large capacity units, thus as a result the large capacity units get rapid development. The drum boiler can not maintain the natural circulation under supercritical pressure due to water and steam having the equal density under the critical parameters, and once-through boiler puts into practice instead. Rapid changes in load result in the main steam pressure fluctuations easily because of once-through boiler＇s smaller heat storage capacity, which would affect the stability of the unit coordinated control system, and make it difficult to meet requirements of rapid load changes in participating in primary frequency control. Control strategies and experimental analysis on primary frequency regulation for the supercritical power unit are introduced in details on the basis of supercritieal unit coordinated control features.
出处
《山东电力技术》
2016年第3期17-20,共4页
Shandong Electric Power
关键词
超临界机组
直流炉
一次调频
the supercritical power unit
once-through boiler
primary frequency regulation
