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Enhancing the Dynamic Performance of Grid Following Inverters in Distribution Networks Using Integral Terminal Sliding Mode Control
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DOI：10.1109/TPWRS.2025.3638750.png)
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Abstract
En 中文
This paper aims to develop a robust active/reactive power (P-Q) regulation framework for solar photovoltaic(PV) driven grid-following inverters (GFLIs) that relies on a cascaded control architecture consisting of a primary current control layer and a secondary P-Q control layer. Generally, GFLIs face oscillatory instability issues, particularly under external grid disturbances, due to the limitations of conventional linear controllers such as proportional-integral (PI) control. To address these challenges, this study proposes a novel P-Q control strategy that integrates integral terminal sliding mode control (ITSMC) with a nonlineardisturbance observer (DOB). The proposed method enhances dynamic response, improves disturbance rejection, and ensures robust power delivery despite system uncertainties and disturbances. Additionally, it significantly improves the stability of the DC-link voltage and current during transient conditions. The parameter selection of the controller is performed numerically and using MATLAB simulations for a single-bus GFLI network. The feasibility of the proposed controller is further evaluated using OPAL-RT real-time simulations on the IEEE 33-bus distribution test system, including three GFLIs located at different locations across varying X/R ratios. The observations demonstrate that the proposed control architecture outperforms the conventional method by providing precise power regulation and superior transient stability under realistic disturbance scenarios.
Keywords:
Power system dynamics
Mathematical models
Inverters
Power system stability
Voltage control
Phase locked loops
Current control
Regulation
PI control
Transient analysis
Active/reactive power control
disturbance observer (DOB)
finite-time stability
grid-following inverters (GFLI)
robustness
solar photovoltaic (PV)
and terminal sliding mode control (TSMC)
Journal
IF:
7.2
Papers:
1.1W
Citations:
5.0W
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Cited Papers