一种基于瞬时无功功率理论的改进谐波检测算法

An Improved Harmonic Detection Algorithm Based on Instantaneous Reactive Power Theory

近年来,随着风电装机容量的不断增加、高压直流输电工程的不断投运,电力系统的电力电子化程度越来越高。而随着电力电子设备在电力系统中不断增多,电力系统的谐波特性也更为复杂。以瞬时无功功率理论为基础,提出了一种改进的谐波检测算法,该算法能够检测各个频段的正序和负序谐波,弥补了传统谐波检测算法的不足。最后,通过搭建电磁暂态仿真模型,验证了所提改进谐波检测算法的有效性。

In recent years,with the growth of installed wind power capacity and hige voltage direct current(HVDC),more and more electrical power electronic equipment in power system are brought which brings many issues,such as complex harmonic current. Based on the instantaneous reactive power theory,a modified harmonic detection algorithm was introduced which could detect all harmonics at different frequency and sequence so as to make up the deficiency of traditional harmonic detection algorithm. The electromagnetic transient simulations based on a practical wind power system were carried out to validate the effectiveness and accuracy of the proposed harmonic detection method.