Impedance Modeling and Interaction Stability Analysis of Grid-Connected Voltage Source Converter Considering Multiple Frequency Coupling Factors

2021 ◽  
Author(s):  
Jinzhu Shi ◽  
Lihui Yang ◽  
Meiting Zhu
Keyword(s):  
Stability Analysis ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Multiple Frequency ◽  
Impedance Modeling ◽  
Coupling Factors ◽  
Frequency Coupling

scholarly journals Impedance Modeling and Stability Analysis of DFIG-Based Wind Energy Conversion System Considering Frequency Coupling

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3243
Author(s):  
Shaojian Song ◽  
Peichen Guan ◽  
Bin Liu ◽  
Yimin Lu ◽  
HuiHwang Goh
Keyword(s):  
Stability Analysis ◽  
Coupling Effect ◽  
Impedance Model ◽  
Wind Energy Conversion ◽  
Proposed Model ◽  
New Type ◽  
Impedance Modeling ◽  
Frequency Coupling ◽  
Bus Voltage ◽  
Voltage Dynamics

Impedance-based stability analysis is an effective method for addressing a new type of SSO accidents that have occurred in recent years, especially those caused by the control interaction between a DFIG and the power grid. However, the existing impedance modeling of DFIGs is mostly focused on a single converter, such as the GSC or RSC, and the influence between the RSC and GSC, as well as the frequency coupling effect inside the converter are usually overlooked, reducing the accuracy of DFIG stability analysis. Hence, the entire impedance is proposed in this paper for the DFIG-based WECS, taking coupling factors into account (e.g., DC bus voltage dynamics, asymmetric current regulation in the dq frame, and PLL). Numerical calculations and HIL simulations on RT-Lab were used to validate the proposed model. The results indicate that the entire impedance model with frequency coupling is more accurate, and it is capable of accurately predicting the system’s possible resonance points.

Modeling and Simulation of Voltage Source Converter–Medium-voltage DC System for Stability Analysis

2011 ◽  
Vol 39 (11) ◽  
pp. 1134-1150 ◽  
Author(s):  
Seetharama Rudraraju ◽  
Suresh C. Srivastava ◽  
Anurag K. Srivastava ◽  
Noel N. Schulz
Keyword(s):  
Stability Analysis ◽  
Modeling And Simulation ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Medium Voltage ◽  
Dc System ◽  
Medium Voltage Dc

Recursive SISO Impedance Modeling of Single-Phase Voltage Source Rectifiers

2021 ◽  
Author(s):  
Jianheng Lin
Keyword(s):  
Transfer Function ◽  
Single Phase ◽  
Analytical Form ◽  
Voltage Source ◽  
Phase Voltage ◽  
Modeling Framework ◽  
Single Input Single Output ◽  
Impedance Model ◽  
Impedance Modeling ◽  
Frequency Coupling

<p>This paper proposes a recursive single-input single-output (SISO) impedance modeling framework for single-phase voltage source rectifiers, which can greatly simplify both the modeling procedure and the resulting impedance model. During the modeling process, frequency-coupling effects are modeled by the reduced-order transfer function vector rather than the transfer function matrix, so the modeling complexity is reduced. Moreover, the recursive SISO impedance model has an analytical form. And the recursive SISO impedance model can characterize the frequency-coupling dynamics of arbitrary order with a low computation burden. Experiments validate the accuracy of the recursive SISO impedance modeling.<br></p>

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