基于煤质在线检测的燃烧优化及自适应协调控制研究  

Combustion Optimization and Adaptive Coordination Control Based on Online Detection of Coal Quality

作　　者：王文毓 弓林娟 王林[1] 高耀岿 赵章明 高林[1] 谢贝贝 唐勇峰 WANG Wenyu;GONG Linjuan;WANG Lin;GAO Yaokui;ZHAO Zhangming;GAO Lin;XIE Beibei;TANG Yongfeng(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;Huaneng Inner Mongolia East Energy Co.,Ltd.,Hailar 021000,Inner Mongolia Autonomous Region,China)

机构地区：[1]西安热工研究院有限公司,西安710054 [2]华能内蒙古东部能源有限公司,内蒙古海拉尔021000

出　　处：《动力工程学报》2023年第2期143-150,共8页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2019YFB1505400)。

摘　　要：为了提高燃煤机组对煤质变化的自适应能力,通过结合激光诱导击穿光谱技术和软测量模型,开发入炉煤质在线分析系统,并基于煤质数据,提出了含氧量、二次风及燃尽风优化控制策略;并提出以入炉煤质为输入热值的依据,辅以模糊控制、多象限区间划分等先进控制算法的协调控制方法,实现某1 000 MW机组汽温、汽压及变负荷速率的精准调控。结果表明:燃烧优化控制投入后,机组NO_(x)质量浓度降低,各主要输出更加平稳;协调控制投入后,在550~900 MW区间内,稳态运行最大压力偏差基本维持在0.13 MPa左右,各主要参数稳定、无摆动现象;在变负荷运行模式下,主汽压力在升降负荷过程中的最大压力偏差基本维持在0.5 MPa左右,过热度波动约为6 K,水冷壁无超温现象,运行效果良好。To improve the adaptive ability of coal-fired units to the variation of coal quality,an on-line analysis system of coal quality was developed with a combination of laser-induced breakdown spectroscopy and soft sensing model.Based on the coal quality,the optimization control strategies of oxygen,secondary air,and over-fire air were proposed.An advanced coordination control method including fuzzy control and multi-quadrant interval division was proposed by using the calorific value of coal as an input.The accurate control of steam temperature,steam pressure and variation rate of load in a 1 000 MW unit was realized.Results show that the NO_(x)concentration in the unit decreases,and the main output becomes more stable after the in-operation of combustion optimization control.After the in-operation of coordination control,the maximum pressure deviation in the steady state maintains at 0.13 MPa in the load range of 550 to 900 MW.And the main parameters keep stable without the swing phenomenon.In variable load operation mode,the maximum deviation of the main steam pressure maintains at about 0.5 MPa during the load increase or decrease,and the fluctuation of the superheat degree keeps at about 6 K,the water wall run well without the over temperature phenomenon.

关 键 词：入炉煤质 在线检测 软测量 协调控制 

分 类 号：TM621[电气工程—电力系统及自动化]