Aoyang Liu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Aoyang Liu has a total of 9 co-authors. Here are the top co-authors by number of shared publications:
- Chan Xiao
College of Electrical and Information Engineering, Hunan University, Changsha, Hunan Province China
1 shared publication - Jie Zhou
College of Electrical and Information Engineering, Hunan University, Changsha, Hunan Province China
1 shared publication - Leming Zhou
College of Electrical and Information, Hunan University, Changsha, China
1 shared publication - Shuke Wang
College of Electrical and Information Engineering, Hunan University, Changsha 410012, China
1 shared publication - Siyi Liu
College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, China
1 shared publication - Weilang Yi
College of Electrical and Information Engineering, Hunan University, Changsha, Hunan Province China
1 shared publication
Latest Publications
- 8 June 2020
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 36 (1) , 1030-1042
Harmonic Current and Inrush Fault Current Coordinated Suppression Method for VSG Under Non-ideal Grid Condition
For VSG, the voltage-controlled harmonic-suppression-method will seriously deteriorate the magnitude of inrush fault current in the moment of grid symmetrical fault, because the suppression effects of harmonic current and inrush fault current are mutually constrained from the perspective of its output impedance. For this issue, a harmonic current and inrush fault current coordinated suppression method is proposed to achieve both good results of harmonic current suppression in normal grid and inrush fault current limitation in fault grid, which mainly includes a passive branch, an active branch and an improved VSG control. The passive branch is installed between PCC and grid to introduce an additional voltage variable. Meanwhile, with the proper feed-forward of PCC voltage and additional voltage, the active branch increases the mid/high frequency impedance viewed from grid fault point to VSG, and decreases harmonic impedance viewed from PCC to VSG. Then, not only transient inrush fault current is limited, but also harmonic current introduced from nonlinear load is mostly absorbed. Moreover, the improved VSG control is used to limit steady-state fundamental frequency fault current. Therefore, the contradictory between harmonic current and inrush fault current suppression for VSG is well solved. Finally, the experiment results validate the proposed control method.
- 8 June 2020
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 36 (1) , 1030-1042
Harmonic Current and Inrush Fault Current Coordinated Suppression Method for VSG Under Non-ideal Grid Condition
For VSG, the voltage-controlled harmonic-suppression-method will seriously deteriorate the magnitude of inrush fault current in the moment of grid symmetrical fault, because the suppression effects of harmonic current and inrush fault current are mutually constrained from the perspective of its output impedance. For this issue, a harmonic current and inrush fault current coordinated suppression method is proposed to achieve both good results of harmonic current suppression in normal grid and inrush fault current limitation in fault grid, which mainly includes a passive branch, an active branch and an improved VSG control. The passive branch is installed between PCC and grid to introduce an additional voltage variable. Meanwhile, with the proper feed-forward of PCC voltage and additional voltage, the active branch increases the mid/high frequency impedance viewed from grid fault point to VSG, and decreases harmonic impedance viewed from PCC to VSG. Then, not only transient inrush fault current is limited, but also harmonic current introduced from nonlinear load is mostly absorbed. Moreover, the improved VSG control is used to limit steady-state fundamental frequency fault current. Therefore, the contradictory between harmonic current and inrush fault current suppression for VSG is well solved. Finally, the experiment results validate the proposed control method.