Based on it, a Current Transducer’s signal-processing using hardware-synchronized sampling technology and interpolating windowed FFT algorithm is introduced, Simulation result demonstrates that the design approach is highly precise and effective.

According to the interpolating windowed FFT method, a multifunctional virtual instrument system for harmonic measurement of voltage and current signals is designed and implemented with LabVIEW environment.

This paper analyzes the problem existing in the conventional harmonic analysis method,investigates two digital arithmetic-hanning-windowed interpolated FFT and wavelet analysis method for dielectric loss measurements,and contrastes their advantages and disadvantages.

This paper introduces the methods used in dielectric loss measurement and the problem of conventional Harmonic Analysis method in dielectric loss measurement,and analyzes the improved dielectric loss measurement algorithm: Hanning-windowed interpolated FFT algorithm,and validates it with simulation experiment and field measurement.