基于瞬时无功功率理论的电流高次谐波检测方法研究

介绍了基于瞬时无功功率理论的谐波检测方法原理，通过对基于瞬时无功功率理论的ip-iq检测方法在电流谐波检测应用中的分析研究，在ip-iq检测方法的基础上，提出了一种适于电流高次谐波检测的改进ip-iq检测方法．这种方法通过在原检测方法中补加上负序分量检测环节，可检测出电流高次谐波的正序和负序分量，进而实现电流高次谐波的检测．最后，通过仿真实验表明了改进的方法对电流高次谐波的检测比原方法具有更好的准确性，更适于对具体的高次谐波进行检测．

Study of high-order harmonic current detecting method based on instantaneous reactive power theory

The principle of harmonic detecting method based on instantaneous reactive power theory is introduced in this paper. After the analytical study of ip-iqdetecting method based on instantaneous reactive power theory as well as its application in the current harmonic detection, and on the basis of this method, an improved ip-iq detecting method suitable for the high-order harmonic current detection is proposed. This method add the detection of negative-phase-sequence to the original method, and thus it can detect positive- and negative-phase-sequence components of high-order harmonic current, so the detection of high-order harmonic current is achieved. Finally, it is shown through simulation experiments that the improved method has an advantage over the original method in high- order harmonic current detection.