灵活调峰下火电机组回热系统的CNN-GA-FFC控制策略研究  

Research on CNN-GA-FFC Control Strategy of Thermal Power Unit Regeneration System with Flexible Peak Regulation

作　　者：黄青岭 曹越 庞海宇 司风琪[1] HUANG Qing-ling;CAO Yue;PANG Hai-yu;SI Feng-qi(Key Laboratory of Energy Thermal Conversion and Control of Ministiy of Education,Southeast University,Nanjing,China,Post Code:210096;Inner Mongolia Daihai Electric Power Generation Co.Ltd.,Beijing Energy Investment Holding Co.Ltd.,Wulanchabu,China,Post Code:013700)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096 [2]京能集团内蒙古岱海发电有限责任公司,内蒙古乌兰察布013700

出　　处：《热能动力工程》2020年第12期121-127,共7页Journal of Engineering for Thermal Energy and Power

摘　　要：灵活调峰状态下,火电机组回热系统各加热器的水位存在调节偏差过大的问题。提出了基于压缩最近邻和遗传算法的前馈控制逻辑,并将其应用于某火电机组2号高压加热器水位的运行控制。利用历史运行数据,通过聚类数据约简得到负荷均匀分布的样本数据,采用最小二乘拟合方法得到一组模型参数,以此为初始值采用遗传优化算法进行局部优化,最终获得改进的高加水位前馈控制系统的多变量回归模型。现场试验结果表明:高加水位在负荷变化时,水位波动保持在±5 mm以内,在设定值阶跃扰动试验中保持在±2 mm以内,显著提升了高加水位的控制效果。该方法得出的前馈参数有效抑制了负荷变化带来的水位波动,使得高加水位几乎不受负荷变化影响。In the state of flexible peak regulation,the water level of each heater of the thermal power unit’s regenerative system has the problem of excessive adjustment deviation.This paper proposes a feed-forward control logic based on compressed nearest neighbors and genetic algorithm,and applies it to the operation control of the water level of the 2# high pressure heater of a thermal power unit.This method uses historical operating data to obtain sample data with uniform load distribution through clustering data reduction,and uses least squares fitting method to obtain a set of model parameters,and then uses this as the initial value for partial optimization via genetic optimization algorithm,and finally obtains the improved multi-variable regression model of feedforward control system for the high heater water level.The field test results show that the water level fluctuation is kept within ±5 mm when the load changes in the high water level,and within ±2 mm in the set value step disturbance test,which significantly improves the control effect of the high water level.The feed-forward parameters obtained by this method effectively suppress the fluctuation of the water level caused by the load change,making the high water level hardly affected by the load change.

关 键 词：火电机组回热系统 灵活调峰 数据约简 遗传算法 控制策略 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]