热力发电2025，Vol.54Issue(3)：79-89,11.DOI:10.19666/j.rlfd.202407171
基于时变预测控制的直流炉供热机组电热协调变负荷策略
Electric heating coordinated load variation strategy for once through boiler based on time-varying model predictive control
张小科 1韩崇尚 2郝倚燃 2王建波 1张少锋 1胡怀中2
作者信息
- 1. 国网河南省电力公司电力科学研究院,河南 郑州 450000
- 2. 西安交通大学自动化科学与工程学院,陕西 西安 710100
- 折叠
摘要
Abstract
Under the background of"dual-carbon"goal,the combined heat and power units with once through boilers are required to have the ability to quickly change load.To address this need,a strategy based on linear time-varying model predictive control(LTV-MPC)for coordinating electricity and heat to change unit load is proposed,which can simultaneously utilize boiler heat storage and heat network heat storage to improve the rate of variable load.Firstly,the deviation of the heat load signal is integrated to establish an equivalent heat load model,which is used as one of the controlled variables in the prediction model.Then,by taking rapid load tracking,stable unit operation,and timely compensation for heating as the objective of MPC rolling optimization,the optimal control law for each moment is solved online,and then it is applied to the unit.In addition,the operational constraints of the unit are explicitly addressed to ensure that changes in the heating extraction flow rate do not affect the operational stability of the low-pressure cylinder.Finally,simulation verification is conducted on a 350 MW unit,and the results show that this strategy can accurately track the 5%Pe/min variable load command.Furthermore,the heat load recovery time is reduced by 26%compared with that of the electric heating coordinated variable load strategy based on PID.The simulation results have verified the superiority of the proposed strategy in improving the fast load changing capacity of heating units.关键词
直流炉供热机组/电热协调/快速变负荷/热负荷补偿/时变模型预测控制Key words
combined heat and power units with once through boilers/electric heating coordination/rapid load change/heating load compensation/time-varying model predictive control引用本文复制引用
张小科,韩崇尚,郝倚燃,王建波,张少锋,胡怀中..基于时变预测控制的直流炉供热机组电热协调变负荷策略[J].热力发电,2025,54(3):79-89,11.
