一种RB工况下超临界机组主蒸汽温度控制策略  

A Control Strategy for Main Steam Temperature of Supercritical Unit Under RB Condition

作　　者：杨敏 牟文彪 陆陆 郑天瑞 王印松[3] YANG Min;MOU Wenbiao;LU Lu;ZHENG Tianrui;WANG Yinsong(Zhejiang Zheneng Technology Research Institute,Hangzhou 310000,China;Zhejiang Energy Group Co.,Ltd,Hangzhou 310000,China;Department of Automation,North China Electric Power University,Baoding 071003,China)

机构地区：[1]浙江浙能技术研究院,浙江杭州310000 [2]浙江省能源集团有限公司,浙江杭州310000 [3]华北电力大学自动化系,河北保定071003

出　　处：《电力科学与工程》2020年第7期61-67,共7页Electric Power Science and Engineering

摘　　要：针对超临界机组RB过程中主蒸汽温度的控制问题,在分析了中间点温度和主汽温的主要影响因素以及二者在RB过程中的动态变化特性的基础上,提出了RB工况下主蒸汽温度的综合控制策略并进行了相应的逻辑优化。在给水控制策略优化上,首先细化了不同类型辅机RB时的给水设定值生成时间,然后引入中间点温度的调节信号进行共同调节。主汽压力控制策略根据不同工况滑压曲线设置限速速率和惯性时间。根据改进后的控制策略搭建仿真模型。仿真结果表明:该控制策略在RB过程中能够减少中间点参数的波动,进而稳定主汽温变化,保证了机组运行的安全性与经济性。Aiming at the control problem of main steam temperature in RB process of supercritical unit,based on the analysis of the main influencing factors of intermediate point temperature and main steam temperature as well as the dynamic characteristics of them in RB process,the comprehensive control strategy of main steam temperature under RB condition is put forward and the corresponding logic optimization is carried out.In the optimization of feed water control strategy,firstly,the generation time of feed water set point for different types of auxiliaries in RB process is refined,and then the regulating signal of middle point temperature is introduced for common regulation.The main steam pressure control strategy sets the speed limit rate and inertia time according to the sliding pressure curve of different working conditions.The simulation model is built according to the improved control strategy.The simulation results show that the control strategy can reduce the fluctuation of the parameters of the intermediate point in the RB process,and then stabilize the main steam temperature change,so as to ensure the safety and economy of the unit operation.

关 键 词：RB过程 主蒸汽温度 中间点温度 综合控制策略 

分 类 号：TM621.6[电气工程—电力系统及自动化]