ANALYSIS AND RESEARCH ON FAULT TRANSIENT CHARACTERISTICS OF DC SYSTEM CONSIDERING NEW FLEXIBLE CURRENT LIMITER

Zheng Feng; Wang Weidong; Lin Yanzhen; Sun Yubo; Tu Chengqian; Liang Ning

doi:10.19912/j.0254-0096.tynxb.2023-0935

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (10) : 199-210. DOI: 10.19912/j.0254-0096.tynxb.2023-0935

ANALYSIS AND RESEARCH ON FAULT TRANSIENT CHARACTERISTICS OF DC SYSTEM CONSIDERING NEW FLEXIBLE CURRENT LIMITER

Zheng Feng¹, Wang Weidong¹, Lin Yanzhen², Sun Yubo³, Tu Chengqian³, Liang Ning⁴

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Abstract

In order to solve the problem of insufficient economy and practicability of traditional flexible current limiting device in DC grid, a modular current limiting inductance structure and input scheme are proposed in this study as a novel form of DC flexible current limiting device. A corresponding control design strategy is suggested based on this structure. The proposed structure enhances the fault tolerance rate of the flexible current limiting device, improves its economy, and increases the speed and efficacy of fault current suppression. It achieves quick isolation of permanent faults in the DC line and enables self-healing of transient faults without the need for circuit breaker activation. To further confirm the efficacy of the proposed device, a software platform is used to build a multi-terminal flexible DC simulation system. This system investigates both permanent and transient faults in the DC line.

Key words

current limiter / power system protection / DC grid / economy / control layer design / transient analysis

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Zheng Feng, Wang Weidong, Lin Yanzhen, Sun Yubo, Tu Chengqian, Liang Ning. ANALYSIS AND RESEARCH ON FAULT TRANSIENT CHARACTERISTICS OF DC SYSTEM CONSIDERING NEW FLEXIBLE CURRENT LIMITER[J]. Acta Energiae Solaris Sinica. 2024, 45(10): 199-210 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0935

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