Fault analysis of the direct current optical current transformer
CHEN Yufei1,2, JIN Haiwang1,2, LI Jinbo1,2, LIU Peng1,2, LIU Yang1,2
1. State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488; 2. Hebei Key Laboratory of Equipment and Technology Demonstration of Flexible DC Transmission, Tianjin 300100
Abstract DC optical current transformer (OCT) is an important equipment in high voltage direct current (HVDC) transmission project. Its safety and stability is of great significance to the power grid. In this paper, the causes of a DC optical current transformer fault at a converter station are analyzed and the possible location of the fault is investigated. Finally, it is determined that the change in the characteristic parameters of the fault is caused by the cracks produced after the long term deterioration of the optical fiber melting point. This work is of certain reference value for fault analysis of the OCT in engineering.
2025, Vol. 26 
