孙曙光,刘 策,杜太行,耿宾,武玉维.基于加窗Hilbert变换的选相合闸技术的研究[J].电测与仪表,2015,52(20):. SUN Shu-guang,LIU Ce,DU Tai-hang,GENG Bin,WU Yu-wei.Research on Phase Selection Technology Based on Adding-Window Hilbert Transformation[J].Electrical Measurement & Instrumentation,2015,52(20):.
基于加窗Hilbert变换的选相合闸技术的研究
Research on Phase Selection Technology Based on Adding-Window Hilbert Transformation
For the technology of phase selection of instantaneous calibration test for molded case circuit breaker, this paper proposes the technology of phase selection based on Hilbert transformation. The basic principle and algorithm of it are analyzed, and this method can dynamically measure the practical frequency, phase and power factor angle of voltage and current; Compared with the traditional FFT calculation method, parameter calculation accuracy is not sensitive to the grid frequency fluctuation and the testing effect is good under amplitude fluctuation or high SNR condition; By adding-window functions to the sampling signal, it further improves the calculation accuracy of phase selection parameters. Finally, it provides the design scheme of phase selection equipment based on PIC microcontroller.
