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超临界锅炉中间点温度增益切换控制方法

DOI: 10.13334/j.0258-8013.pcsee.2014.14.008, PP. 2274-2280

Keywords: 超临界直流锅炉,中间点温度,模糊切换,线性自抗扰控制,分布参数模型

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Abstract:

超临界机组中间点温度控制品质直接关系到超临界锅炉煤水比和主蒸汽温度控制的质量,关系到机组的经济性和安全性。为了实现对中间点温度的高质量控制,该文将目前两种煤水比控制方案相结合,引入强度系数无扰动切换新型控制方案。该方法解决了中间点温度调节快速性与水冷壁汽水分离界面稳定性的矛盾,并将线性自抗扰技术应用于修正给煤量控制,缩短了控制时间。应用该方法对某660MW超临界机组分布参数模型进行了仿真研究,结果表明在不同负荷下,该方案在对中间点温度控制上可取得满意的效果。

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