文章基本信息

标题：An improved ip-iq harmonic detection method
本地全文：下载
作者：Yang Guoqing ; Yan Kai ; Wang Deyi 等
期刊名称：E3S Web of Conferences
印刷版ISSN：2267-1242
电子版ISSN：2267-1242
出版年度：2021
卷号：248
页码：2045
DOI：10.1051/e3sconf/202124802045
出版社：EDP Sciences
摘要：The i p -i q harmonic detection method based on instantaneous reactive power has been widely used in active power filter (APF). However, the traditional i p -i q detection method has errors when the grid voltage is unbalanced and distorted. This paper proposes an improved i p -i q harmonic detection method, which uses adaptive notch filter (ANF) to extract the fundamental positive-sequence voltage signal, so that the phase locked loop (PLL) can still accurately obtain the phase information under bad grid conditions. At the same time, moving average filter (MAF) is used to replace low-pass filtering to reduce the detection delay. The simulation results show that the improved i p -i q detection method can accurately detect harmonic current under non-ideal grid voltage conditions, and has good dynamic characteristics.
其他摘要：The i p -i q harmonic detection method based on instantaneous reactive power has been widely used in active power filter (APF). However, the traditional i p -i q detection method has errors when the grid voltage is unbalanced and distorted. This paper proposes an improved i p -i q harmonic detection method, which uses adaptive notch filter (ANF) to extract the fundamental positive-sequence voltage signal, so that the phase locked loop (PLL) can still accurately obtain the phase information under bad grid conditions. At the same time, moving average filter (MAF) is used to replace low-pass filtering to reduce the detection delay. The simulation results show that the improved i p -i q detection method can accurately detect harmonic current under non-ideal grid voltage conditions, and has good dynamic characteristics.