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Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 718))

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Abstract

New energy power injection to the distribution network has increased the difficulty of fault line selection. A new approach to solve the problem by using new energy power generation devices is proposed in this paper. And a fault line selection method based on characteristic signal injection in the distribution network is proposed. In the situation of single-phase short-line grounding fault, characteristic signal is injected to the distribution network via inverters in a short period by changing its modulation strategy. With the help of distributed zero sequence current measuring devices, zero sequence currents are analyzed and the content of characteristic signal at every measuring point is compared. Then the fault line is selected and the fault identification is completed. Simulation model of typical active distribution network is set up and the contents of characteristic signal are analyzed when the values of grounding resistances are different. According to the simulation result, compared with traditional signal injection method, the new one proposed in this paper has greater measuring. The accuracy of fault line selection can be improved effectively.

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Correspondence to Luqing Sun .

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Yuan, J., Sun, L. (2021). Research on Single-Phase Grounding Line Selection in Distribution Network Based on Signal Injection. In: Xue, Y., Zheng, Y., Bose, A. (eds) Proceedings of 2020 International Top-Level Forum on Engineering Science and Technology Development Strategy and The 5th PURPLE MOUNTAIN FORUM (PMF2020). PMF 2020. Lecture Notes in Electrical Engineering, vol 718. Springer, Singapore. https://doi.org/10.1007/978-981-15-9746-6_49

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  • DOI: https://doi.org/10.1007/978-981-15-9746-6_49

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-15-9745-9

  • Online ISBN: 978-981-15-9746-6

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