Title :
The Mechanism Analysis of Stray Magnetic Field of External Current Interfering the GTA Error
Author :
Ai, Bing ; Jiang, Bo
Author_Institution :
Sichuan Electr. Power Res. Insititute, Chengdu, China
Abstract :
The Large current transformer (GTA)core of the work status will change as stray magnetic fields generated by external current, so that GTA generate additional errors, the accuracy decrease, and even lead to core of GTA saturation or failure.The paper based on the model of equivalent circuit and magnetic model, the error mechanism of external current infulence is analyzed, and the current transformer error performance from external current is researched. In addition, experimental error results of GTA caused by leakage magnetic field is calculated. According to the interference mechanism,the basic Anti-interference principles are proposed.
Keywords :
current transformers; magnetic cores; magnetic leakage; GTA core; GTA error; GTA failure; GTA saturation; anti-interference principles; current transformer error performance; equivalent circuit; error mechanism; external current interfering; interference mechanism; leakage magnetic field; magnetic model; mechanism analysis; stray magnetic field; Current transformers; Integrated circuit modeling; Interference; Magnetic cores; Magnetic fields; Permeability; Windings;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6307524
