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发明公开
CN103759769A 燃煤电站再热蒸汽流量软测量方法和装置 无效 - 驳回

燃煤电站再热蒸汽流量软测量方法和装置
摘要：
本发明公开一种燃煤电站再热蒸汽流量软测量方法和装置。其中通过实时检测工况参数，计算第一级抽汽流量D1和第二级抽汽流量D2之和，并利用第一级抽汽流量D1和第二级抽汽流量D2之和计算再热蒸汽流量精确值Drj(t)，通过对现有的热平衡公式进行简化，从而得到高精度的再热蒸汽流量软测量结果。同时还利用级前参数确定再热蒸汽流量动态值Drf(t)，将再热蒸汽流量精确值Drj(t)和再热蒸汽流量动态值Drf(t)进行信息融合，以得到最终的再热蒸汽流量软测量值Dr(t)。其中在进行信息融合时，通过滤波函数抑制Drf(t)在计算稳态工况时产生的误差，从而使再热蒸汽流量软测量值Dr(t)同时具有再热蒸汽流量精确值Drj(t)的精度和再热蒸汽流量动态值Drf(t)的动态特性，有利于提高锅炉计算指标的准确度。
摘要（英）：

The invention discloses a soft measurement method and device for reheat steam flow of a coal-fired power plant. Work condition parameters are detected in real time, the sum of first-grade steam extraction flow D1 and second-grade steam extraction flow D2 is calculated, the accurate value Drj (t) of the reheat steam flow is calculated by utilizing the sum of the first-grade steam extraction flow D1 and the second-grade steam extraction flow D2, an existing heat balance formula is simplified, and then the high-accuracy soft measurement result of the reheat steam flow is obtained. Meanwhile, the dynamic value Drf (t) of the reheat steam flow is determined by utilizing grade front parameters, and information fusion is carried out on the accurate value Drj (t) and the dynamic value Drf (t) of the reheat steam flow to obtain the final soft measurement value Dr (t) of the reheat steam flow. In the information fusion process, errors generated when Drf (t) calculates the stable work conditions are restrained through a filter function, therefore, the soft measurement value Dr (t) of the reheat steam flow has the accuracy of the accurate value Drj (t) of the reheat steam flow and the dynamic characteristics of the dynamic value Drf (t) of the reheat steam flow, and the accuracy of boiler calculation indexes can be improved.

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