CAJ | 학술논문

结合风电机组变速运行的特点,本文提出一种无转速计阶比分析方法.该方法利用短时傅里叶时频分析提取风电机组多分量振动信号中的参考轴转速信号,再对振动信号进行等角度重采样,进行阶比谱分析.与传统分析方法相比,该方法解决了风电机组中的转速变化导致频谱峰值能量分散问题;同时无需转速计,解决了风电机组采集时的现场工程问题.应用实例分析结果表明:此方法能够有效识别变速中的特征分量,适合于风电机组离线振动监测工作中应用.
결합풍전궤조변속운행적특점,본문제출일충무전속계계비분석방법.해방법이용단시부리협시빈분석제취풍전궤조다분량진동신호중적삼고축전속신호,재대진동신호진행등각도중채양,진행계비보분석.여전통분석방법상비,해방법해결료풍전궤조중적전속변화도치빈보봉치능량분산문제;동시무수전속계,해결료풍전궤조채집시적현장공정문제.응용실례분석결과표명:차방법능구유효식별변속중적특정분량,괄합우풍전궤조리선진동감측공작중응용.
As variable-speed wind turbine has its own characteristics, this paper proposed a tacholess order analysis method. is method use short-time fourier time-frequency analysis to extract the reference sha speed signal of multi-component vibration signal of wind turbine, and use this speed signal to resample the vibration signal, convert the signal from time-domain to angle-domain for order tracking spectrum analysis. Compared with traditional analysis methods, this method solves the problem of spectrum peak dispersion of variable-speed wind turbine and inconvenience to install sensors. e results show that this method can e ectively identify the characteristics of the variable-speed component, suit for application in wind turbine o ine vibration monitoring.