改进型谐波电流检测的仿真研究

Simulation Research of Improved Harmonic Current Detection

谐波电流对电网的污染日益严重,实时、准确地检测出电网中的谐波电流是抑制谐波和无功功率补偿的一项关键技术。基于ip-iq谐波检测方法的原理,根据一种新的谐波电流检测方法—基波幅值分离法,对检测方法中锁相环的作用进行了详细地理论分析,确定了可以省略其的算法条件,并进行了仿真实验。仿真结果表明:基于基波幅值分离法的谐波检测算法可行,在谐波检测系统中,略去锁相环并不影响谐波电流的检测效果。

Harmonic current pollution to network becomes more and more serious, real-time, accurately detect the harmonic currents in power harmonic suppression and reactive power compensation is a key technology. Ip-iq based on the principle of harmonic detection, according to a new harmonic current detection methodseparation based on the fundamental amplitude, the role of phase-locked loop theory in detail in detection. Determine that can be omitted the conditions ofits algorithm, and simulation experiments. Simulation results show that： separation based on the fundamental amplitude of the harmonic detection algorithm is feasible, in the harmonic detection system, omitted phase locked loop does not affect the harmonic current detection.