摘要
主蒸汽压力是表征超临界机组机炉能量供求关系的重要参数,其主要影响因素为燃料量。目前大部分火电厂燃料煤种杂、热值波动大,造成主蒸汽压力波动频繁,严重影响机组运行安全。在燃料量的控制系统中设计了燃料—汽压闭环自抗扰反馈控制回路,主要是借助扩张状态观测器估计出燃煤热值自发扰动,并在动态过程中将其实时补偿,提高入炉煤量的准确性,防止因燃煤热值波动造成主蒸汽压力的频繁波动。利用某660 MW超临界机组设计数据进行建模、计算与仿真,结果表明:与传统PID控制相比,自抗扰控制的抗干扰能力更强,对主蒸汽压力有更好的控制品质。
The main steam pressure is an important parameter which characterizes the energy supply and demand of supercritical boiler and steam turbine, which is affected largely by the mount of fuel. At present, most fuel coal of thermal power plant is complex, calorific value fluctuates, resulting in the frequent fluctuation of the main steam pressure, seriously affecting the safe operation of the unit. A fuel -- main steam pressure ADRC closed loop feedback control loop was designed in the fuel control system, the spontaneous disturbance of coal-fired thermal value was estimated by ESO, which was then real time compensated in the dynamic process, the accuracy of the amount of coal into the furnace was improved, which kept the main steam pressure from fluctuating affected by coal-fired calorific value fluctuations. The design data of a 660 MW ultra--supercritical unit was used to model, compute and simulate, and the results of simulation show that, compared with traditional PID control, ADRC has stronger anti--interference ability and better control quality for main steam pressure.
作者
谷俊杰
张岩
陈见永
王鹏
于文圣
Gu Junjie Zhang Yan Chen Jianyong Wang Peng Yu Wensheng(School of Energy Power and Mechanical Engineering, North China Electric Power University, Banding 071003, China)
出处
《系统仿真学报》
CAS
CSCD
北大核心
2017年第2期430-436,共7页
Journal of System Simulation
基金
河北省教育厅科学研究指导性项目(z2012011)
