分裂基FFT在电力系统谐波检测中的应用

在电力系统中，由于非线性负载广泛应用，电网被注入了大量谐波，给电力系统中的设备带来很大的危害。谐波检测是电力系统质量分析和谐波补偿的关键技术，而快速傅立叶变换是目前应用最广泛的一种谐波检测方法。本文对分裂基FFT算法的原理进行了研究，采用C语言编程实现该算法，并在基于TMS320F2812DSP的实验装置上进行了基于分裂基算法的谐波检测实验，对采样信号进行FFT运算，能快速检测出电网信号中电压的谐波参数，以进行谐波的实时分析处理，验证了该算法的正确性和高速性，可作为一种通用的算法应用于谐波检测。

The Application of Split-Radix FFT on Harmonic Detection in Electric Power System

In the power system, due to wider use of non-linear loads, power grids has been injected a large number of harmonics, which bring great harm to equipments in power system. Harmonic detection is a key technology for power quality analysis and harmonic compensation, while the Fast Fourier Transform is the most widely used as a harmonic detection method. In this paper, we study Split-radix FFT algorithm theory is studied, the algorithm using C language is programed, harmonic detection experiments based on the TMS320F2812 DSP-based experimental setup is carried on. By doing FFT operation to the sampling signal, the grid＇s voltage harmonics signal parameters, for harmonic real-time analysis and process can be detected quickly, the correctness and high speed of the algorithm is verified. It can be used as a general algorithm in harmonic detection.