Quantitative and Intuitive VSG Transient Analysis With the Concept of Damping Area Approximation

Article Engineering, Electrical & Electronic

The Analysis and Calculation of Power Angle Dynamics in Grid Forming Converter Under Large Disturbances Based on KBM Asymptotic Method

Jintao Lei et al.

Summary: This article introduces a Krylov-Bogoliubov-Mitropolsky (KBM) asymptotic method with perturbation theory to analyze the power angle trajectory under large disturbances. It also proposes a tailored integral method to simplify the solution and facilitate the analysis and calculation. The effectiveness and accuracy of the method are verified through simulations and control-hardware-in-loop experiments.

IEEE TRANSACTIONS ON POWER ELECTRONICS (2023)

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Article Engineering, Electrical & Electronic

Synchronization Instability of Inverter-Based Generation During Asymmetrical Grid Faults

Xiuqiang He et al.

Summary: This paper investigates the synchronization stability of inverter-based generation (IBG) during asymmetrical faults. A dual-sequence synchronization model for IBG is developed and the possible types of synchronization instability and their dominant factors are identified through quantitative analysis. The model and analysis are validated through simulations and hardware-in-the-loop experiments.

IEEE TRANSACTIONS ON POWER SYSTEMS (2022)

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Article Engineering, Electrical & Electronic

Transient Stability and Current Injection Design of Paralleled Current-Controlled VSCs and Virtual Synchronous Generators

Chao Shen et al.

Summary: This article investigates the advantages and challenges of paralleled current-controlled voltage source converters and virtual synchronous generators system in providing power and voltage/frequency regulation. By establishing a mathematical model and conducting theoretical analysis, a control method to improve transient stability of the system is proposed, showing better performance compared to traditional methods. The impact of CCS capacity on VSG transient stability is also discussed, with validation through Lyapunov's method and simulation/experimental results.

IEEE TRANSACTIONS ON SMART GRID (2021)

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Article Engineering, Electrical & Electronic

A ΔTj Reduced Power Module With Inbuilt Phase Change Material for Reliability Enhancement

Huaping Jiang et al.

Summary: The article proposes a power module design with reduced junction temperature fluctuation by using phase change material (PCM) as part of thermal management. Experimental results show the effectiveness of reducing junction temperature fluctuation in a certain range of power periods, and thermodynamic simulations illustrate the mechanism of PCM. The proposed approach significantly enhances the reliability of power modules in fluctuating conditions.

IEEE TRANSACTIONS ON ELECTRON DEVICES (2021)

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Article Engineering, Electrical & Electronic

Transient Stability of Power Systems Integrated With Inverter-Based Generation

Xiuqiang He et al.

Summary: The transient stability of the conventional power system is primarily determined by the rotor swing dynamics of synchronous generators, but the integration of inverter-based generations alters the original power-angle relationship, creating a more complex stability mechanism. This change introduces a limit on the peak of the rotor swing, thereby posing a new bottleneck for transient stability.

IEEE TRANSACTIONS ON POWER SYSTEMS (2021)

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Article Engineering, Electrical & Electronic