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Study on the differential protection of busbar with magnetic restraint

Zhong Li

Abstract

It proposes a method of detecting the secondary resistance R of CT on real time based on the principle of magnetic restraint differential protection for busbar. The simulation result shows that with this method, the initial saturation point of CT can be found correctly in despite of the influence from current transient and harmonics. It also can protect the magnetic restraint busbar protection from mal-operation possibly caused by variation of the secondary load of CT.

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Available abstract

Key concepts: Busbar, Differential protection, Harmonics, Transient (computer programming), Saturation (graph theory), Differential (mechanical device), Engineering, Electrical engineering