针对火电厂锅炉再热汽温具有大滞后、大惯性及动态特性随工况变化的特性,在对某超临界600MW机组再热器动态特性进行机理分析的基础上,提出了带再热汽温状态观测器的反馈控制系统设计和参数计算方法.仿真结果表明:与单回路控制策略相比,再热汽温控制系统采用状态变量反馈-前馈-PI相结合的控制策略时,具有较好的控制品质、较强的快速响应性及抗干扰能力.%Aiming at the features of large delay, strong inertia of reheat steam temperature of thermal power boilers and its dynamic characteristics varying with working conditions, a design and parameter calculation method has been proposed for the feedback control system with reheat steam temperature state observer for reheater of a 600 MW supercritical power unit based on dynamic characteristic analysis. Simulation results show that when the reheat steam temperature control system adopts the feedback-feedforward-PI iterative learning control strategy instead of single loop control strategy, better control quality, faster response and stronger anti-interference capability will be obtained.
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