ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION

Yang Libin; Yu Kun; Zeng Xiangjun; Li Li; Wang Fuheng

doi:10.19912/j.0254-0096.tynxb.2022-0028

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (5) : 113-120. DOI: 10.19912/j.0254-0096.tynxb.2022-0028

ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION

Yang Libin, Yu Kun, Zeng Xiangjun, Li Li, Wang Fuheng

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Abstract

To solve the problem that the arc suppression coil hardly suppresses the fault residual current and achieves reliable arc suppression when distributed generation （DG） is connected to the medium voltage distribution network, the impact of DG access on the grounding fault current is analyzed, and the arc suppression method based on injection current regulation is proposed. The active arc suppression device injects the metering current into the neutral point to determine the equivalent voltage source of the positive sequence network, calculates and injects the arc suppression current, and realizes reliable arc suppression of grounding fault. Furthermore, a grounding fault line selection method based on zero sequence admittance measurement is proposed. An accurate selection of grounding fault feeders is realized by measuring the zero sequence admittance of active arc suppression devices and the feeders. PSCAD/EMTDC simulation results show that this method can completely suppress the grounding fault current in distribution network with DG, effectively extinguishing the ground fault arc, and accurately identifying permanent ground fault feeders.

Key words

distribution network / distributed generation / fault current / arc suppression / injection current regulation

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Yang Libin, Yu Kun, Zeng Xiangjun, Li Li, Wang Fuheng. ARC SUPPRESSION AND LINE SELECTION METHOD FOR DISTRIBUTION NETWORK WITH DISTRIBUTED GENERATION BASED ON INJECTION CURRENT REGULATION[J]. Acta Energiae Solaris Sinica. 2023, 44(5): 113-120 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0028

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