2008•RelayRequires access
Improving operation speed of differential protection for transformer at serious interior fault
Yang Hui-hong
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Abstract
By analyzing the cause of operation time of differential protection and the problem of over-current protection in application,a solution is proposed by adding the fast operation zone to improve the operation speed of transformer differential protection according to the relationship between differential current and restraint current.The numerical simulation results verify that this solution can effectively shorten the operation time of differential protection while the serious internal faults occurring.