Aimed at the problem of impulse interference of voltage and leakage current influence the dielectric loss measuring accuracy

an algorithm for dielectric loss measuring was proposed.The algorithm firstly used median filter algorithm to filter impulse interference signal

then the digital algorithm without changing the signal length was proposed to calculate dielectric loss according to the filtered signal.Filter and calculation result of noisy signal indicates that the proposed algorithm not only can suppress impulse interference effectively

but also can improve accuracy of dielectric loss measurement.In the meantime

possibility of dielectric loss measurement error caused by signal length change is avoided by modified median filter algorithm.