摘要
针对火力发电机组燃气锅炉主汽温控制系统大惯性、大时滞、扰动大等特点,提出一种基于隐式广义预测控制(implicit generalized predictive control,IGPC)的主汽温预测控制策略。以主汽温为被控量,减温水流量为控制量,设计应用于燃气发电锅炉主汽温控制系统的隐式广义预测控制策略,通过建立主汽温预测模型,使用滚动优化对目标函数进行输出预测,构建最优控制律,并采用反馈校正在线修正预测值。仿真结果表明,与常规的串级比例积分微分(proportional-integral-derivative,PID)控制、动态矩阵控制和Smith预估补偿控制策略相比,在模型适配施加干扰的情况下,所设计的控制策略在67s左右达到设定值,超调量仅为4.28%;在模型失配情况下,施加干扰的调节时间为78.8s,超调量仅为8.66%。工程应用结果表明:主汽温控制偏差在±7℃左右,其稳定性得到了较大的改善,有效满足燃气发电锅炉主汽温控制系统的实际要求,该策略提高了控制系统的鲁棒性。
Aiming at the characteristics of large inertia,large time delay and large disturbance of the main steam temperature control system of a gas-fired boiler in a thermal power generation unit,a predictive control strategy of the main steam temperature based on IGPC was proposed.For the main steam temperature is controlled,in order to reduce water flows to control the quantity,the implicit generalized predictive control strategy was designed for the main steam temperature control system of a gas power generation boiler.,The rolling optimization output projections for the objective function was used to build the optimal control law,and the forecast correction online was revised with the feedback.The simulation results show that compared with the conventional cascade PID control,dynamic matrix control,and Smith predictive compensation control,the proposed control strategy reaches the set value at about 67s and the overshoot is only 4.28%under the condition of model adaptation interference.In the case of model mismatch,the adjustment time of interference is 78.8s,and the overshoot is 8.66%.The engineering application results show that the main steam temperature control deviation is about±7℃,and its stability has been greatly improved,which effectively meets the actual requirements of the main steam temperature control system of the gas-fired power generation boiler,and this strategy improves the robustness of the control system.
作者
冯旭刚
张泽辰
刘圣晶
章家岩
FENG Xugang;ZHANG Zechen;LIU Shengjing;ZHANG Jiayan(Anhui University of Technology,Maanshan 243032,Anhui Povince,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第9期3307-3316,共10页
Proceedings of the CSEE
基金
安徽省重点研究与开发计划项目(1804a09020094)
安徽省自然科学基金(1908085ME134)
安徽省高校自然科学研究重点项目(KJ2018A0060)。
关键词
燃气发电锅炉
主蒸汽温度
隐式广义预测控制
稳定性
鲁棒性
gas-fired boiler
main steam temperature
implicit generalized predictive control
stability
robustness
