Details

Autor(en) / Beteiligte

• Xu, Jin-Bang
• Yang, Jun
• He, Yue-Jia
• Duan, Dong-Quan

Titel

i(d)-i(q) Algorithm for Harmonic Current Detection Based on Fast Fourier Transform

Ist Teil von

• Dian li dian zi ji shu, 2012-11, Vol.46 (11), p.57-59

Erscheinungsjahr

2012

Beschreibungen/Notizen

• i(d)-i(q) algorithm for harmonic current detection based on the d, q synchronously rotating reference frame is frequently applied by active power filter (APF). However, the response time of this method is relatively long because of the digital low pass filters (LPFs). To combine the advantages of i(d)-i(q) algorithm and fast Fourier transform (FFT) harmonic detection method and overcome their disadvantages, this paper proposes a method in which digital LPFs are replaced by FFT. This method can avoid the design of LPF, which is a very demanding task, and can improve the response speed. And the amount of calculation is acceptable for engineering application. System simulation show that this method can shorten the response time to half of the primitive period, improving the real-time performance of i(d)-i(q) algorithm.