基于异步顺序采样值精确测量电量的方法

Approach for the accurate measurement of electrical quantity based on asynchronous sequential sampling

利用离散频谱详细对比分析了DFT的频谱泄漏和加汉宁窗DFT的频谱泄漏现象,讨论了用异步顺序采样值计算电量产生误差的原因,提出了利用异步顺序采样值精确计算电量的方法,实现了畸变电量的精确测量。仿真结果表明,该方法具有很高的计算精度。

Bv means of the discrete frequency spectrum, the frequency spectrum leakages of the conventional DFT and the DFT with a Hanning window are comparatively analyzed in this paper. The error cause in the electrical quantity measurement using asynchronous sequence sampling is also discussed. Based on the technique of asynchronous sequential sampling, an accurate measurement approach is presented for the measurement of distortional electrical quantity. Simulation result shows that presented approach will provide much better computational precision.