Modeling and analysis for practical CT based on transient test and parameter identification

• DOI: 10.17775/cseejpes.2016.00049
• Publication Date: 2016-12-27T03:05:18Z
• Authors: Xianggen Yin; Zhe Zhang; ; Xuanwei Qi; ; Gan Liu; ; Wenbin Cao; ; Qian Guo
• Keywords: Transient (computer programming); Identification; Transient analysis

In the transient process of power grid faults, transferring distortion current transformer (CT) can seriously affect relay protection performance. Under these conditions, it is difficult to analyze ferromagnetic characteristic magnetizing branch in equivalent circuit CT. The Jiles-Atherton hysteresis model (J-A model), which widely used digital simulations, accurately describe and saturation core characteristics; however, acquire parameters J-A transformers practical use still a challenging problem. this paper, physical tests based on CT parameter identification are presented solve basic loops P, PR, TPY class obtained through tests. Thus, identified using hybrid genetic/simulated annealing algorithm, simulation models different CTs constructed. effectiveness proposed method verified via dynamic A typical accident analyzed models.