WANG Lin, HOU Yuting, XUE Jianzhong, et al. Self-adaptive variable-step size LMS filtering algorithm for major parameters of SCR flue gas denitration system[J]. Thermal power generation, 2016, 45(6): 88-93.
WANG Lin, HOU Yuting, XUE Jianzhong, et al. Self-adaptive variable-step size LMS filtering algorithm for major parameters of SCR flue gas denitration system[J]. Thermal power generation, 2016, 45(6): 88-93.DOI:
To improve the signal-noise ratio of online data identification for SCR flue gas denitration system
this paper applies three representative variable-step least square flitting methods to carry out data filtering for NOxconcentration at inlet and out let of the SCR system and the ammonia spraying amount
on the basis of variable-step self-adaptive filtering method
with different cut-off frequencies.The comparison between the filtering data and the original data shows that
although it costs longer iteration time
the variable-step size method based on a mutual correlation matrix possesses the best stability.Moreover
a slight up-drift occurs to the filtering data under a cut-off frequency of 0.9.At this frequency
the flitting data can also achieve the best general result.