Analysis on reasons of explosion of current transformer on bus coupler segment in weakinfeed side of a substation

Abstract

Abstract: An explosion accident of current transformer on bus coupler segment in weekinfeed side of a 220kV substation was introduced. Combining with the operation mode of the system before the accident, the phenomenon of the accident and the actions of the related protection and switches, according to the principle of the protection device, several key protection actions in the accident process were analyzed. The acting principle and acting process of the optical fiber differential protection and the optical fiber distance protection in weakinfeed line were analyzed emphatically. Combining with the characteristics of the weakinfeed line, some suggestions on its protection configuration and its secondary circuit design were put forward.

Key words: weak-infeed, substation, current transformer, explosion, protection device

ZOU Qiqun;SHU Yishi;YU Peijie. Analysis on reasons of explosion of current transformer on bus coupler segment in weakinfeed side of a substation[J]. Huadian Technology, 2011, 33(9): 69-71.

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Analysis on reasons of explosion of current transformer on bus coupler segment in weakinfeed side of a substation

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