间谐波检测技术及DSP算法设计

Inter-harmonic detection technology and its DSP algorithm design

本文在广义dq_k旋转坐标变换的谐波电流检测理论基础上,以单相电路的间谐波检测为对象,通过对谐波频率倍频,提出了单相电路间谐波检测技术;并基于DSP微处理器研究了该技术工程化方法,包括采样倍频算法、旋转变换算法等DSP算法,并进行了仿真验证。最后,研制了一台基于DSP(TMS320F2812)的动态实时全谐波(包括间谐波和整数次谐波)检测装置,实验结果表明,该间谐波检测算法可行且精度较高。

The paper offers an single-phase inter-harmonic detection technology using frequency multiplication algorithm based on generalized dk-qk coordinate transform theory; explores the mathematic model in DSP algorithm design, including frequency multiplication algorithm, coordinate transform algorithm, Q-Format algorithm and so on. Simulations were carried out to verify these algorithms and a real-time entire harmonic detection device was developed, which is based on DSP（TMS320 F2812）. Simulation and experiment results indicate that the proposed interharmonic detection algorithm is feasible and has high detection accuracy.