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针对火电机组主蒸汽流量测量精度不高的问题,提出了一种准确度较高的主蒸汽流量测量模型,利用依据质量守恒原理的主蒸汽流量稳态模型和基于弗留格尔公式的主汽流量测量模型的信息互补性,设计互补滤波器将2种模型在频域内进行融合获得了新的测量模型,并将该模型在某电厂3号机组上进行了仿真验证.结果表明:新模型不仅在机组稳态时准确度高,还可以快速地、准确地反映主蒸汽流量的变化趋势.
Aiming at the problem that the main steam flow measurement accuracy of thermal power unit is not high, a new model of main steam flow measurement with high accuracy is proposed. By using the steady flow of main steam flow and the FVM based on the principle of conservation of mass, The complementarity of the information of the flow measurement model, the design of a complementary filter to the two models in the frequency domain fusion to obtain a new measurement model, and the model in a power plant Unit 3 simulation results show that: the new model not only High accuracy in the steady state of the unit, but also can quickly and accurately reflect the main steam flow trends.