Zhiyuan Ma
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Interests
Zhiyuan Ma has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Chen Wei
School of Automation, Wuhan University of Technology, Wuhan 430070, China
1 shared publication - Hui Hou
School of Automation, Wuhan University of Technology, Wuhan, China
1 shared publication - Ming Yang
State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing, China
1 shared publication - Xianqiang Li
School of New Energy and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China
1 shared publication
Latest Publications
- Open Access
Novel Remanence Determination for Power Transformers Based on Magnetizing Inductance Measurements
The remanence (residual flux) in the core of power transformers needs to be determined in advance to eliminate the inrush current during the process of re-energization. In this paper, a novel method is proposed to determine the residual flux based on the relationship between residual flux and the measured magnetizing inductance. The paper shows physical, numerical, and analytical explanations on the phenomenon that the magnetizing inductance decreases with the increase of residual flux under low excitation. Numerical simulations are performed by EMTP (Electro-Magnetic Transient Program) on a 1 kVA power transformer under different amounts of residual flux. The inductance–remanence curves are nearly the same when testing current changes. Laboratory experiments conducted on the same transformer are in line with the numerical simulations. Furthermore, numerical simulation results on a 240 MVA are reported to demonstrate the effectiveness of the proposed method.
Open AccessNovel Remanence Determination for Power Transformers Based on Magnetizing Inductance Measurements
The remanence (residual flux) in the core of power transformers needs to be determined in advance to eliminate the inrush current during the process of re-energization. In this paper, a novel method is proposed to determine the residual flux based on the relationship between residual flux and the measured magnetizing inductance. The paper shows physical, numerical, and analytical explanations on the phenomenon that the magnetizing inductance decreases with the increase of residual flux under low excitation. Numerical simulations are performed by EMTP (Electro-Magnetic Transient Program) on a 1 kVA power transformer under different amounts of residual flux. The inductance–remanence curves are nearly the same when testing current changes. Laboratory experiments conducted on the same transformer are in line with the numerical simulations. Furthermore, numerical simulation results on a 240 MVA are reported to demonstrate the effectiveness of the proposed method.