基于小波变换的燃烧不稳定性检测方法研究

Research of Combustion Instability Detection Method Based on Wavelet Transform

利用小波变换多尺度分析分解和重构燃气轮机燃烧室的高频、中频和低频压力信号,并在时域上定位燃烧不稳定性发生的时刻。对于具有不稳定成分的压力信号,该方法能够正确地检测出不稳定性,结果与电厂实际运行情况一致。

Through making use of wavelet transform, the multiscale analysis, decomposition and reconstruc- tion of the combustor＇ s high frequency, medium frequency and low frequency signals of the gas turbine were implemented, including determination of combustion instability＇ s location occurred in the time domain. As for the pressure signals with instability, this method can detect the combustion instability that agrees well with real plant operation.