Influence of overexcitation on RET316 type transformer differential protection

Abstract

Abstract: Abstract:The RET316 type transformer differential protection device manufactured by ABB was introduced. An incorrect tripping of the transformer differential protection occurred in the voltage rising process of a unit in Huadian International Zouxian Power Plant. Taking this accident as example, the reasons of incorrect tripping of the ABBmade RET316 scalar product braking type transformer differential protection in overexcitation were analyzed comprehensively. It was determined that the overexcitation is the main reason causing the transformer differential protection to trip incorrectly. The effective measures were adopted, and similar accident dos not occur again.

Key words: Key words:RET316 type transformer, differential protection, excitation surge current, overexcitation, reason analysis

BU Fanwei, LIN Xiguo. Influence of overexcitation on RET316 type transformer differential protection[J]. Huadian Technology, 2013, 35(8): 31-35.

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Influence of overexcitation on RET316 type transformer differential protection

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