Error of dielectric loss angle measurement can be alleviated in asynchronous sampling by adopting modified ideal sampling frequency method

and the accuracy of calculation result can be improved. But the method needs to get the fundamental harmonic frequency of signal beforehand. The dielectric loss angle measurement combined modified ideal sampling frequency with spectrum rectifying is presented in the paper. In this method

signal frequency is acquired by harmonics analysis method based on hanning-windowed interpolation

then

the array of asynchronous sampling is set up according to the frequency obtained. The dielectric loss angle of equipment is obtained by DFT. Simulation results show that this algorithm has high accuracy

and easy to realize

which is a worthy method for dielectric loss angle measurement.