35kV busbar disconnection phenomenon

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The substation and SCADA system will issue signals such as "35kV busbar grounding" or "Arc Suppression Coil No. The voltage of the faulted phase drops, while the other two phase voltages rise. This article introduces a case of 35kV ring main unit busbar insulation breakdown failure, analyzes the failure causes and proposes solutions , providing reference for the construction and operation of new energy power stations. Common methods of protecting busbars include overcurrent-based interlocking schemes, overcurrent-based differential protection, high-impedance differential protection, and percentage differential protection. Busbar protection (BBP): Protection intended to detect and operate to clear faults on a busbar.

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