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安徽工业大学电气与信息工程学院,安徽,马鞍山,243032
Online First:10 October 2019,
Published:2019
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Main Steam Temperature Control of Thermal Power Boiler Based on Dynamic Matrix Control[J]. 2019, 53(10): 96-102+174.
Main Steam Temperature Control of Thermal Power Boiler Based on Dynamic Matrix Control[J]. 2019, 53(10): 96-102+174. DOI: 10.7652/xjtuxb201910013.
针对火力发电锅炉主汽温控制系统的大惯性、纯滞后和非线性等特点
提出一种基于动态矩阵控制的主汽温预测控制策略。根据过热蒸汽传输通道特性
将减温水流量扰动作为前馈补偿; 综合考虑机组负荷、燃料波动等扰动因素设计动态矩阵控制器; 采用有限时段的滚动优化策略
并引入基于误差的反馈校正算法
从而能全面考虑模型失配、时变、干扰等引起的不确定性
及时弥补这些因素造成的影响
提高系统的鲁棒性。仿真结果表明:与常规PID和Smith预估控制策略相比
在施加扰动情况下所设计的控制策略调节时间最多可减少314.28 s
超调量最多可降低12.6%; 在模型失配情况下调节时间最多可减少516.66 s
超调量最多可降低15.46%。工程应用结果表明:主汽温控制偏差低于±5 ℃
动态和稳态性能得到了很大改善
能有效满足发电锅炉主汽温控制系统的实际要求。
A predictive control strategy of main steam temperature based on dynamic matrix control is proposed and the characteristics of large inertia
pure lag and nonlinearity of main steam temperature control for thermal power boilers are taken into account.According to the characteristics of superheated steam transmission channel
the disturbance of cooling water flow is used as feed-forward compensation.A dynamic matrix controller is designed by comprehensive consideration of disturbance factors such as unit load
fuel fluctuation and so on.The algorithm adopts a rolling optimi-ation strategy with finite time interval and introduces an error-based feedback correction algorithm so that uncertainties caused by model mismatch
time-varying and interference are comprehensively considered
and the influence caused by these factors is compensated in time
so as to improve the robustness of the system.Simulation experiments and comparisons with the conventional PID and Smith control strategies sho
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李沁伦,王璐凯,刘银河,等.300 MW一次再热亚临界燃煤发电站系统改进研究.2018,52(9):54-63.[doi:10.7652/xjtuxb201809007]
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