中国电机工程学报2024，Vol.44Issue(16)：6518-6528,11.DOI:10.13334/j.0258-8013.pcsee.231186
MPS型磨煤机制粉系统动态模型与瞬态运行优化控制研究
Study on Dynamic Model and Transient Operation Optimization Control of the MPS Coal Mill Pulverizing System
摘要
Abstract
To improve the control accuracy of the critical parameters of the MPS coal pulverization system during the loading cycling process,this paper establishes and verifies the dynamic model of the pulverization system and conducts control strategy optimization research.On the basis of the original logic of the pulverizing system,it is proposed to add the primary air temperature control loop at the inlet of the feedforward pulverizer for considering the coal moisture information to improve the control strategy.Simulation research such as the increase of coal moisture,the increase of coal feeding rate,and the load cycling of the pulverizer is carried out.The transient characteristics of key parameters and energy consumption of the pulverizing system are obtained,verifying the proposed strategy's superiority.Research results show that:Once the control logic of the pulverizing system proposed is adopted,the response rate of the system is improved when confronted with disturbances like sudden variations in the feed coal flow rate or abrupt increases in the moisture content of the coal.What's more,the fluctuation range of the pulverized coal temperature decreases by more than 50％,and the transient energy consumption decreases by 2.4％.During the load cycling transient process of the pulverizer,the steady-state energy consumption can be reduced by more than l00kW,and the energy consumption in the pulverizing process can be reduced by 6.82％.During the transient process,the fluctuation range of the pulverizer outlet temperature can be reduced by 50％,the response time can be shortened by more than 10％,and the maximum transient energy saving can be achieved by 5.43％,which comprehensively guarantees the operation safety of the pulverizing system and reduces the energy consumption.When the optimization control logic of the pulverizing system proposed is applied in a coal-fired power plant,the operation deviations of key parameters,such as load rate and main steam pressure,can be reduced during the load cycling transient process.Thus the operational flexibility of the power plant can be improved.关键词
MPS型磨煤机/制粉系统/动态模型/变出力/瞬态能耗/控制优化Key words
MPS coal mill/coal pulverizing system/dynamic model/load cycling/transient energy consumption/optimization of control分类
信息技术与安全科学引用本文复制引用
王朝阳,石慧,王文毓,许朋江,范建林,刘明,严俊杰..MPS型磨煤机制粉系统动态模型与瞬态运行优化控制研究[J].中国电机工程学报,2024,44(16):6518-6528,11.基金项目
国家自然科学基金项目(52106026) （52106026）
陕西省科学技术协会青年人才托举计划项目(20220469) （20220469）
陕西省自然科学基础研究计划项目(2021JLM-34).Project Supported by National Natural Science Foundation of China(52106026) （2021JLM-34）
Young Talent Fund of Association for Science and Technology in Shaanxi Province(20220469) （20220469）
Natural Science Basic Research Plan in Shaanxi Province of China(2021JLM-34). （2021JLM-34）
