基于瞬时无功功率理论的谐波检测的DSP实现

Implement of Harmonics Detection With DSP Based on Instantaneous Reactive Power Theory

针对有源滤波器对谐波检测的实时性、准确性要求,提出了利用TMS320F240DSP实现基于瞬时无功功率理论的ip、iq方式的谐波检测方法.首先利用MATLAB对ip-iq谐波检测方法进行仿真,得到了在三相输入时输入电流和输入电流谐波的数据和波形,然后利用code composer开发工具在TMS320F240 DSP上对这种谐波检测的方法作了具体实现,最后把MATLAB仿真的结果和DSP谐波检测的计算结果进行了对比.分析和实验结果表明,这种谐波检测方法具有快速性和准确性,可以满足有源滤波器对谐波检测的要求.从而为在单片DSP上实现有源滤波器的控制打下了基础.

APF(active power filter) is one of effective solutions to harmonics in power system. In order to meet the real time and accuracy requirement of this way, an ip,iq harmonics detection method based on the instantaneous reactive power theory has been introduced by means of TMS320F240DSP. At first, the data and wave of input current and the current harmonics in 3 phases system have been obtaind through simulation of MATLAB on the ip,iq harmonics detection method. Then thedetailed implement on TMS320F240DSP has been completed with DSP developing tool-code composer. At last the result comparison has been done between MATLAB simulation and DSP calculation. The analysis and test result show that this method has the characteristics of real time and accuracy, and can meet the harmonics detection requirement of APF.