Modeling and Dynamic Stability Analysis of Grid Following Inverter Integrated with Photovoltaics

The power transfer capacity of transmission lines is limited by the stability of the power system. Additionally, the dynamics of photovoltaic (PV) integration through the grid following inverter (GFI) affect the stability limits, which are not well studied in the literature. This paper, therefore, f...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2023-08, Vol.11 (4), p.1-1
Main Authors: Prakash, Surya, Zaabi, Omar Al, Behera, Ranjan Kumar, Jaafari, Khaled Al, Hosani, Khalifa Al, Muduli, Utkal Ranjan
Format: Article
Language:English
Subjects:
Active damping
Control theory
Damping
Dynamic loads
Dynamic stability
Electric power systems
Electrical loads
Feedback loops
Grid following inverter
Inverters
Irradiance
Liapunov functions
Lyapunov function analysis
Parameters
Photovoltaic cells
Power harmonic filters
Power system stability
Power System stability limit
Power transfer
Power transfer capabilities
Reactive power
Solar photovoltaic
Stability analysis
Transmission lines
Tuning
Voltage control
Voltage sags
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Summary:The power transfer capacity of transmission lines is limited by the stability of the power system. Additionally, the dynamics of photovoltaic (PV) integration through the grid following inverter (GFI) affect the stability limits, which are not well studied in the literature. This paper, therefore, focuses on the stability-constrained power transfer capabilities of transmission lines with single-phase PV-GFI integration. An adaptive tuning method is proposed based on Lyapunov function analysis that increases the power transfer capability limit. Outer and inner control loop parameters are considered as candidates for the proposed method. The proposed tuning law is not affected by the active and reactive power requirements, low-voltage or over-voltage ride-through, network impedance, and load changes. Additionally, an active damping method utilizing a capacitor voltage feedback loop is proposed to eliminate the effect of resonance with improved power quality. The proposed method is validated through simulation and experimental verification for various test scenarios, such as sudden changes in solar irradiance, dynamic load changes, network parameter variation, and grid voltage sag-swell conditions. The proposed tuning method achieves an enhanced power transfer capacity limit compared with the existing method.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2023.3272822