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为便于设计更为有效的母管蒸汽压力控制系统,考虑到目前并列运行锅炉线性化模型的局限性,在机理分析和适当简化的基础上,提出了并列锅炉主蒸汽压力对象的一种低阶非线性全局动态模型。该模型同时考虑到并列运行机组的分布式特点,对蒸汽母管的处理进行了改进,根据母管的分布以及机、炉的影响,将蒸汽母管进行合理分段,建立了分段集中式母管模型。在Matlab/Simulink仿真平台上建立了相应的模型并进行了仿真研究和分析,结果证明此模型是正确有效的,可用于并列锅炉动态特性的分析及蒸汽母管压力控制策略的研究。
In order to facilitate the design of a more effective mother-pipe steam pressure control system, taking into account the limitations of the current parallel boiler model, a low order of the main steam pressure of the parallel boiler is proposed based on the mechanism analysis and appropriate simplification. Nonlinear global dynamics model. The model takes into account the distributed characteristics of parallel running units and improves the processing of the steam manifold. According to the distribution of the manifold and the influence of the machine and the furnace, the steam manifold is reasonably segmented to establish a segmented centralized Master tube model. The corresponding model was established on the Matlab / Simulink simulation platform, and the simulation and analysis were carried out. The results show that the model is correct and effective and can be used to analyze the dynamic characteristics of the parallel boiler and the pressure control strategy of steam manifold.