A new accurate calculation method of electric power harmonic parameters was presented. Based on the delay time theorem of Fourier transform, the frequency of the electric power was calculated, and then, suing interpol...A new accurate calculation method of electric power harmonic parameters was presented. Based on the delay time theorem of Fourier transform, the frequency of the electric power was calculated, and then, suing interpolation in the frequency domain of the windows, the parameters （amplitude and phase） of each harmonic frequency signals were calculated accurately. In the paper, the effect of the delay time and the windows on the electric power harmonic calculation accuracy was analysed. The digital simulation and the physical measurement tests show that the proposed method is effective and has more advantages than other methods which are based on multipoint interpolation especially in calculation time cost; therefore, it is very suitable to be used in the single chip DSP micro-processor.展开更多
针对广东电网公司对谐波检测技术在电能计量自动化系统中的应用需求,首次提出了谐波检测在计量自动化终端中的实现方法。研究EDIT-FFT(equal decimation in time fast Fourier transformation)算法对采样信号进行处理得到分次谐波畸变率...针对广东电网公司对谐波检测技术在电能计量自动化系统中的应用需求,首次提出了谐波检测在计量自动化终端中的实现方法。研究EDIT-FFT(equal decimation in time fast Fourier transformation)算法对采样信号进行处理得到分次谐波畸变率,并结合电能数据固定、平滑、短数据帧的特点,研究RAY-Period压缩算法并首次应用到智能计量自动化终端,解决了存储空间以及与主站通讯两方面的问题。该文的研究为广东电网公司的电能计量自动化系统的功能完善打下了坚实的基础。展开更多
文摘A new accurate calculation method of electric power harmonic parameters was presented. Based on the delay time theorem of Fourier transform, the frequency of the electric power was calculated, and then, suing interpolation in the frequency domain of the windows, the parameters （amplitude and phase） of each harmonic frequency signals were calculated accurately. In the paper, the effect of the delay time and the windows on the electric power harmonic calculation accuracy was analysed. The digital simulation and the physical measurement tests show that the proposed method is effective and has more advantages than other methods which are based on multipoint interpolation especially in calculation time cost; therefore, it is very suitable to be used in the single chip DSP micro-processor.
文摘针对广东电网公司对谐波检测技术在电能计量自动化系统中的应用需求,首次提出了谐波检测在计量自动化终端中的实现方法。研究EDIT-FFT(equal decimation in time fast Fourier transformation)算法对采样信号进行处理得到分次谐波畸变率,并结合电能数据固定、平滑、短数据帧的特点,研究RAY-Period压缩算法并首次应用到智能计量自动化终端,解决了存储空间以及与主站通讯两方面的问题。该文的研究为广东电网公司的电能计量自动化系统的功能完善打下了坚实的基础。
