We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Magnetic integrated LLCL filter with resonant frequency above Nyquist frequency.
- Authors
Al‐Barashi, Maged; Wu, Siqi; Liu, Zhigang; Meng, Xiangyu; Tasiu, Ibrahim Adamu
- Abstract
This paper presents a design technique of magnetic integrated LLCL filters for grid‐tied inverters. With the proposed design technique, the LLCL filter's resonant frequency can be higher than the Nyquist frequency. Furthermore, the proposed concept was only reported for the LCL filter in the previous research works. In addition, the modulation process will produce dominant switching harmonics for unipolar PWM H‐bridge inverters at the double switching frequency. Thus, putting the resonant frequency beyond the Nyquist frequency will increase the stability zone. The proposed design methods maximize the filter inductors' utilization and resist the grid impedance variations under weak grid conditions, depending on the improved stability zone. Comparative simulation and HIL experimental results are presented to confirm the effectiveness of the proposed magnetic integrated LLCL filter design. The HIL experimental results and the simulation results agree well with each other.
- Subjects
NYQUIST frequency; PULSE width modulation transformers; DESIGN techniques; PULSE width modulation inverters; AIR filters; SECOND harmonic generation
- Publication
IET Power Electronics (Wiley-Blackwell), 2022, Vol 15, Issue 13, p1409
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/pel2.12313