CHEN Chenggong, LI Aiyuan, LING Zhiyong. Simulation of TA steady-state saturated characteristics and influence of TA saturation on over-current protection[J]. 2016, 36(1): 12-17.
CHEN Chenggong, LI Aiyuan, LING Zhiyong. Simulation of TA steady-state saturated characteristics and influence of TA saturation on over-current protection[J]. 2016, 36(1): 12-17.DOI:
TA稳态饱和特性仿真及TA饱和对过流保护的影响
摘要
对不同饱和程度下TA稳态二次电流进行仿真
并根据微机保护装置的常见算法
模拟保护装置的离散采样过程
对仿真得到的二次电流进行计算
分析TA稳态饱和特性
以及TA饱和对过流保护的影响。提出了TA饱和后
可以根据过饱和系数
选取合适的采样频率和整定值
保证保护装置正确动作。
Abstract
Firstly
the simulation of steady-state secondary current under different degree of saturation is implemented in this paper. Then
according to the common algorithms of microprocessor-based protection
the discrete sampling process is simulated
and the sampling value of secondary current is calculated. Based on the simulation results
TA steady-state saturated characteristics are analyzed
and TA saturation influence on over-current protection are discussed. Lastly
this paper proposes that when TA is saturated
the selection of suitable sampling frequency and setting value based on saturation factor can make sure the protection operates correctly.