scholarly journals Impedance Modeling and Stability Analysis of Three-phase Four-leg Grid-connected Inverter Considering Zero-sequence

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Heng Nian ◽  
Yuming Liao ◽  
Meng Li ◽  
Dan Sun ◽  
Yunyang Xu ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Three Phase ◽  
Zero Sequence ◽  
Impedance Modeling ◽  
Grid Connected Inverter

scholarly journals Coupling Influence on the dq Impedance Stability Analysis for the Three-Phase Grid-Connected Inverter

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3676
Author(s):  
Chuanyue Li ◽  
Taoufik Qoria ◽  
Frederic Colas ◽  
Jun Liang ◽  
Wenlong Ming ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Nyquist Plot ◽  
Current Control ◽  
Impedance Ratio ◽  
Three Phase ◽  
Grid Impedance ◽  
Nyquist Criterion ◽  
Grid Connected Inverter ◽  
The Stability ◽  
The Right

The dq impedance stability analysis for a grid-connected current-control inverter is based on the impedance ratio matrix. However, the coupled matrix brings difficulties in deriving its eigenvalues for the analysis based on the general Nyquist criterion. If the couplings are ignored for simplification, unacceptable errors will be present in the analysis. In this paper, the influence of the couplings on the dq impedance stability analysis is studied. To take the couplings into account simply, the determinant-based impedance stability analysis is used. The mechanism between the determinant of the impedance-ratio matrix and the inverter stability is unveiled. Compared to the eigenvalues-based analysis, only one determinant rather than two eigenvalue s-function is required for the stability analysis. One Nyquist plot or pole map can be applied to the determinant to check the right-half-plane poles. The accuracy of the determinant-based stability analysis is also checked by comparing with the state-space stability analysis method. For the stability analysis, the coupling influence on the current control, the phase-locked loop, and the grid impedance are studied. The errors can be 10% in the stability analysis if the couplings are ignored.

New Perspectives on Stability Analysis of Three-Phase Grid-Connected Inverter Considering System Couplings

2020 ◽  
Vol 35 (3) ◽  
pp. 1967-1978
Author(s):  
Jingrong Yu ◽  
Xianfu Lin ◽  
Dongran Song ◽  
Ruoxue Yu ◽  
Jian Yang ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Three Phase ◽  
Grid Connected Inverter

Harmonic Transfer-Function-Based Impedance Modeling of a Three-Phase VSC for Asymmetric AC Grid Stability Analysis

2019 ◽  
Vol 34 (12) ◽  
pp. 12552-12566 ◽  
Author(s):  
Chen Zhang ◽  
Marta Molinas ◽  
Atle Rygg ◽  
Jing Lyu ◽  
Xu Cai
Keyword(s):  
Stability Analysis ◽  
Transfer Function ◽  
Three Phase ◽  
Impedance Modeling
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