首页>
外国专利>
METHOD FOR ONLINE EVALUATION OF FAILURE CAUSED BY ROTORIC ECCENTRICITY GENERATORS AND SYNCHRONOUS MOTORS
METHOD FOR ONLINE EVALUATION OF FAILURE CAUSED BY ROTORIC ECCENTRICITY GENERATORS AND SYNCHRONOUS MOTORS
展开▼
机译:转子偏心发电机与同步电动机的故障在线评估方法。
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention concerns a on-line evaluation of failure due to rotoric eccentricity in generators/synchronous motors by measuring inner currents of statoric winding and spectral analyses of analytical signals derived from the same by complex transformation, said method comprising the steps of: a1. Eventually a commissioning a1. step to determine parameters (a, b, c, prif), necessary in an eventual folloqing step f.; a. measurement of instantaneous inner statoric currents b. calculation of complex vectors i(q)) by formula wherein α = ej(2π/n); c. spectral analyses of analytical signal associated with complex vectors of p±1 order: i(p-1), i(p+1); d. extraction of amplitudes of spectral components S1, D1, S2, D2, wherein: S7=amplitude of component with frequence f of current i(p-1); D1= amplitude of component with frequence (f-f/p) of current KM) S2= amplitude of component with frequence f of current i(p+1) D2= amplitude of component with frequence (f+f/p) of current i(p+1) p=number of polar couples of synchronous machine e. calculation of instantaneous eccentricity applying formulae and f. eventually, and only if preliminary commissioning step was carried out, to increase precision under load, it is possible, also measuring tension, estimating field angle (zeta, ζ) and thus corrective coefficient Κ(ζ).
展开▼
机译:本发明涉及通过测量定子绕组的内电流和通过复杂变换从中得出的分析信号的频谱分析,在线评估由于发电机/同步电动机中的转子偏心引起的故障,所述方法包括以下步骤:a1。最终调试a1。确定最终的步骤f所需的参数(a,b,c,离心)的步骤;一种。瞬时内部定子电流的测量b。通过公式计算复矢量 i I> (q) Sup>),其中α= e j(2π/ n); Sup> c。与p±1阶复矢量相关的分析信号的频谱分析:i(p-1),i(p + 1); d。提取频谱分量S1,D1,S2,D2的幅度,其中:S7 =电流i(p-1)的频率f的分量的幅度; D1 =电流KM的频率(ff / p)的分量的幅度S2 =电流i(p + 1)的频率f的分量的幅度D2 =电流i(f + f / p)的频率f(f)的分量的幅度p + 1)p =同步电机e的极对数。应用公式和f计算瞬时偏心率。最终,只有执行初步的调试步骤,才能提高负载下的精度,还可以测量张力,估算视场角(ζ,ζ),从而校正系数K(ζ)。
展开▼