基于内模原理电站锅炉汽温控制策略的工程应用

针对电站锅炉汽温被控对象大滞后、大惯性的特点，设计了一种新的基于内模控制原理的过热汽温控制策略。该控制策略已成功应用于徐州电厂6号机组670t／h超高压锅炉，现场调试和机组运行结果表明，这种基于内模控制原理的控制策略具有结构简单、在线调整参数少、可以明显提高控制回路的鲁棒性及抗干扰能力。现场试验结果表明，与传统串级比例-积分-微分（PID）调节方案相比，无论对于稳态过程或动态过程，新控制策略的调节品质均有明显提高。

Engineering Application of Superheated Steam Temperature Control Strategy for Utility Boiler Based on Internal Model Control Principle

Considering superheated steam temperature is a thermal object with large inertial and big-lagged characteristics, a new steam temperature control strategy for utility boiler based on the internal model control principle is proposed. This control strategy is successfully applied to 670 t/h super-pressure boiler of No. 6 Unit in Xuzhou Power Plant. Process of commissioning and performance of unit operating indicates that this new control strategy has the features of simple structure, limited on-line tuning parameters and fine performance in robustness and anti-interference. On-site test shows that the new control strategy is superior to the conventional PID cascade control strategy in control quality under the conditions of either stable process or dynamic process.