TY - GEN
T1 - Virtual Node Control Strategy Based on FBD Detection for Harmonic Suppression
AU - Feng, Bowen
AU - Fan, Di
AU - Fu, Yu
AU - Bai, Yanan
AU - Yang, Jingxi
AU - Huang, Yuehui
AU - Li, Shouxiang
N1 - Publisher Copyright:
© Beijing Paike Culture Commu. Co., Ltd. 2026.
PY - 2026
Y1 - 2026
N2 - With the continuous development of the renewable energy industry, modern power systems exhibit "double-high" characteristics, leading to reduced grid strength, increased background harmonic interference, and prominent power quality issues. To enhance the weak-grid adaptability of inverter systems, the virtual node voltage feedback control is proposed. While this method effectively improves inverter stability under weak-grid conditions, it results in higher output current harmonic distortion in strong grids. To simultaneously address harmonic suppression capability and weak-grid stability, a virtual node control strategy based on Fryze-Buchholz-Depenbrock (FBD) detection is proposed. The method employs FBD-based detection to extract grid-connected current harmonic components and utilizes the virtual node control strategy for harmonic suppression. The control model built in Matlab/Simulink demonstrate stable operation across short-circuit ratio (SCR) range from 2 to 20. Results show that under strong-grid conditions with SCR=20, the proposed strategy reduces output current total harmonic distortion (THD) by up to 30%; under weak-grid conditions with SCR=2, it achieves up to 24% THD reduction.
AB - With the continuous development of the renewable energy industry, modern power systems exhibit "double-high" characteristics, leading to reduced grid strength, increased background harmonic interference, and prominent power quality issues. To enhance the weak-grid adaptability of inverter systems, the virtual node voltage feedback control is proposed. While this method effectively improves inverter stability under weak-grid conditions, it results in higher output current harmonic distortion in strong grids. To simultaneously address harmonic suppression capability and weak-grid stability, a virtual node control strategy based on Fryze-Buchholz-Depenbrock (FBD) detection is proposed. The method employs FBD-based detection to extract grid-connected current harmonic components and utilizes the virtual node control strategy for harmonic suppression. The control model built in Matlab/Simulink demonstrate stable operation across short-circuit ratio (SCR) range from 2 to 20. Results show that under strong-grid conditions with SCR=20, the proposed strategy reduces output current total harmonic distortion (THD) by up to 30%; under weak-grid conditions with SCR=2, it achieves up to 24% THD reduction.
KW - FBD
KW - harmonic suppression
KW - stability
KW - virtual node
UR - https://www.scopus.com/pages/publications/105041834459
U2 - 10.1007/978-981-92-0627-8_22
DO - 10.1007/978-981-92-0627-8_22
M3 - Conference contribution
AN - SCOPUS:105041834459
SN - 9789819206261
T3 - Lecture Notes in Electrical Engineering
SP - 213
EP - 223
BT - The Proceedings of 2025 International Conference of Electrical, Electronic and Networked Energy Systems - Volume 4
A2 - Yang, Xu
A2 - Yang, Fei
A2 - Liu, Yonghui
A2 - Cheng, Xian
A2 - Xie, Wenhao
A2 - Liu, Yixin
PB - Springer Science and Business Media Deutschland GmbH
T2 - International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2025
Y2 - 31 October 2025 through 2 November 2025
ER -