为了提高故障测距精度,在传统测距方法的基础上,采用不受波速影响的输电线路故障测距的新方法,并将它与小波变换相结合.文章选取dBN小波和三次B样条小波作对比,将它们与新方法结合,通过西安市供电局的实际故障数据验证.结果表明,用3次B样条小波与新方法结合得到的测距结果比较接近于实际的距离,其精度高于db3小波与新方法所得的结果,误差远远低于db3小波函数,测距效果令人满意.%In order to improve the accuracy of fault location, a new method which adopting avoiding wave speed of the transmission line fault lo-cation was proposed based on the combination with the wavelet transform The results were verified by the actual breakdown data of Xi'an power sup-ply bureau through comparing with dBN and cubic B-spline wavelet, and combining the new method The experiment results indicated that three B-spline wavelet combinated with the new method can best satitfy the people's need,as it got a close to the atual distance in measurement,its accuracy way higher than the db3 wavelet and the new method and it got the far below error than the db3 wavelci funtion.
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