Weichen Qian
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Weichen Qian has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
- Jun Yin
School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450000, China
1 shared publication - Ziang Chen
School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450000, China
1 shared publication
Latest Publications
- Open Access
- 6 October 2024
- Published by MDPI AG in Applied Sciences
- Vol. 14 (19) , 9026
Stability Comparison of Grid-Connected Inverters Considering Voltage Feedforward Control in Different Domains
Under the background of high permeability, voltage feedforward control may further weaken the stability of grid-connected inverter (GCI) systems and may cause sub-synchronous oscillation in extreme cases. To solve this problem, this paper firstly considers the influence of the frequency coupling effect and voltage feedforward control, and adopts the harmonic linearization method to construct the L-type GCI sequence admittance model with PI (proportional integral) control and PR (proportional resonant) control, respectively. By comparing the sequence admittance characteristics of the GCI under two control strategies, combined with the sequence admittance model and Nyquist criterion, this paper analyzes the influence of voltage feedforward and control parameters on the stability of the GCI under two control strategies. The results show that the stability of GCI under PR control is slightly better than that under PI control. At the same time, the voltage feedforward control does reduce the stability of the GCI system under the two control strategies. Finally, the accuracy of the theoretical analysis is verified by simulation and experiment.
- 6 October 2024
- Published by MDPI AG in Applied Sciences
- Vol. 14 (19) , 9026
Open AccessStability Comparison of Grid-Connected Inverters Considering Voltage Feedforward Control in Different Domains
Under the background of high permeability, voltage feedforward control may further weaken the stability of grid-connected inverter (GCI) systems and may cause sub-synchronous oscillation in extreme cases. To solve this problem, this paper firstly considers the influence of the frequency coupling effect and voltage feedforward control, and adopts the harmonic linearization method to construct the L-type GCI sequence admittance model with PI (proportional integral) control and PR (proportional resonant) control, respectively. By comparing the sequence admittance characteristics of the GCI under two control strategies, combined with the sequence admittance model and Nyquist criterion, this paper analyzes the influence of voltage feedforward and control parameters on the stability of the GCI under two control strategies. The results show that the stability of GCI under PR control is slightly better than that under PI control. At the same time, the voltage feedforward control does reduce the stability of the GCI system under the two control strategies. Finally, the accuracy of the theoretical analysis is verified by simulation and experiment.