典型电能计量算法数值仿真及性能比较研究

在梳理较为成熟的五种典型电能计量算法的原理和特点基础上,分别在非同步采样和同步采样条件下运用这五种算法进行数值仿真分析,考察它们测算总电能、基波电能和谐波电能的准确性和实时性。研究发现,Nuttall窗双谱线插值FFT算法、Rife-Vincent窗双谱线插值FFT算法、小波包分解和重构算法测算总电能和基波电能的相对误差较小;而小波包分解和重构算法、Prony算法和准同步采样FFT算法测算谐波电能的相对误差较大;再者,Rife-Vincent窗双谱线插值FFT算法和Nuttall窗双谱线插值FFT算法的实时性均明显优于其他算法。这些结论可为实际应用提供参考。

Simulation and performance comparison of electric energy metering algorithms

The principle and features of 5 kinds of typical and mature electric energy metering algorithms are intro-duced simply .Then ,the 5 algorithms are used to meter total electric energy , fundamental energy and harmonic energy under non-synchronous and synchronous conditions .So the relative errors and calculating times can be got .In gener-al, the relative errors are smaller when using Nuttall window double-spectrum-line interpolation based FFT algorithm , Rife-Vincent window double-spectrum-line interpolation based FFT algorithm and wavelet packet decomposition and reconstruction algorithm to compute total electric energy , while the relative errors are bigger when using wavelet packet decompasition and reconstruction algorithm , Prony algorithm and quasi-synchronous sampling based FFT algorithm to compute harmonic energy .And Nuttall window double-spectrum-line interpolation based FFT algorithm and Rife-Vin-cent window double-spectrum-line interpolation based FFT algorithm has betterreal-time performance than the other three kinds of algorithms .These conclusions can provide reference for practical applications .