TY - GEN
T1 - Stability Enhancement of Grid-Connected Inverters under High Renewable Penetration via FA-KF PLL and Hysteresis-Scored MPC
AU - Yang, Nan
AU - Hao, Chen
AU - Mou, Shanke
AU - Xia, Kai
AU - Zhu, Xuanwen
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - This paper presents a stability enhancement approach for grid-connected inverters under high renewable penetration. A frequency-adaptive Kalman-filtered phase-locked loop (FA-KF PLL) mitigates harmonic contamination and frequency fluctuations, reshaping inverter-grid impedance. A hysteresis-scored model predictive control (HS-MPC) introduces multi-objective scoring to balance current tracking, harmonic distortion, and switching effort. Stability is assessed via LCL modeling, sequence-impedance Nyquist criteria, and pole analysis. MATLAB/Simulink studies across weak-grid scenarios show reduced THD and settling time, improved phase/gain margins, and fewer switching actions.
AB - This paper presents a stability enhancement approach for grid-connected inverters under high renewable penetration. A frequency-adaptive Kalman-filtered phase-locked loop (FA-KF PLL) mitigates harmonic contamination and frequency fluctuations, reshaping inverter-grid impedance. A hysteresis-scored model predictive control (HS-MPC) introduces multi-objective scoring to balance current tracking, harmonic distortion, and switching effort. Stability is assessed via LCL modeling, sequence-impedance Nyquist criteria, and pole analysis. MATLAB/Simulink studies across weak-grid scenarios show reduced THD and settling time, improved phase/gain margins, and fewer switching actions.
KW - Kalman filter
KW - grid-connected inverter
KW - high renewable penetration
KW - model predictive control
KW - phase-locked loop
KW - stability
KW - weak grid
UR - https://www.scopus.com/pages/publications/105036682587
U2 - 10.1109/CEPET67280.2025.11390818
DO - 10.1109/CEPET67280.2025.11390818
M3 - Conference contribution
AN - SCOPUS:105036682587
T3 - 2025 International Conference on Energy Power and Electrical Technology, CEPET 2025
SP - 16
EP - 20
BT - 2025 International Conference on Energy Power and Electrical Technology, CEPET 2025
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2025 International Conference on Energy Power and Electrical Technology, CEPET 2025
Y2 - 21 November 2025 through 23 November 2025
ER -