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- Title
Integral‐type half‐tangent phase‐locked loop for more electric aircraft grids.
- Authors
Zhao, Yiyun; Li, Guangqi; Dai, Zhiyong; Li, Bingqiang; Lin, Hui; Yang, Jianwei
- Abstract
In this paper, an integral‐type half‐tangent phase‐locked loop (IHTan‐PLL) is proposed for the varying‐frequency AC grids of more electric aircraft (MEA). First, the performance of the synchronous reference frame phase‐locked loop (SRF‐PLL) and half‐tangent phase‐locked loop (HTan‐PLL) is discussed from a large‐signal viewpoint. When the frequency changes largely, the SRF‐PLL has many oscillations and endures a rather long transient process. The HTan‐PLL can address the large frequency jumps. However, for the varying‐frequency AC grids with harmonic disturbances, the HTan‐PLL still has oscillations in estimating the frequency when the frequency jumps largely. To enhance the performance of the SRF‐PLL and HTan‐PLL, the IHTan‐PLL is developed for the varying‐frequency AC grids with harmonic disturbances. The IHTan‐PLL performs better than the SRF‐PLL and HTan‐PLL in addressing the large frequency jumps. Specifically, under any large frequency changes, the IHTan‐PLL still converges to the equilibrium point (0,0), and no oscillations emerge. In addition, the IHTan‐PLL has better steady‐state accuracy in estimating the frequency than the SRF‐PLL and HTan‐PLL. The experimental results also demonstrate the superior performance of the proposed IHTan‐PLL.
- Subjects
PHASE-locked loops; ELECTRIC power distribution grids; HYBRID electric airplanes; FREQUENCIES of oscillating systems
- Publication
IET Power Electronics (Wiley-Blackwell), 2023, Vol 16, Issue 9, p1472
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/pel2.12483