Title :
Transient Analysis for Over-Current of Electromagnetic PT due to Single-Phase-Grounded in Ungrounded Neutral System
Author :
Qu, Yilong ; Tan, Weipu ; Zhang, Jian ; Yang, Yihan
Author_Institution :
Dept. of Electr. Eng., North China Electr. Power Univ., Beijing
Abstract :
In ungrounded neutral system the over-current in the primary of electromagnetic potential transformer (PT) due to single-phase-to-earth fault takes place frequently. This paper focuses on the transient analysis of the above over-current phenomenon. Base on the equivalent circuit and the electromagnetism character of PT, we deduce the transient equation of PT current and disclosure the essence reason of over-current. With computer simulation (MATLAB) and experimental study in the laboratory (the 10 kV high voltage physical simulating system) verified the precision of the analysis result in this paper
Keywords :
electromagnetism; equivalent circuits; mathematics computing; potential transformers; transient analysis; MATLAB; PT over-current; electromagnetic potential transformer; electromagnetism character; equivalent circuit; grounded neutral system; single-phase-to-earth fault; transient analysis; ungrounded neutral system; Circuit faults; Computational modeling; Computer simulation; Electromagnetic transients; Equations; Equivalent circuits; Laboratories; MATLAB; Transient analysis; Voltage transformers; Transient analysis; electromagnetic PT; over-current; ungrounded neutral system;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1546853
