摘要
针对常规取能电源取能范围较小、一次大电流工作不稳定等问题,提出磁芯参数优化设计方法和多匝数与并联电阻相结合的饱和抑制方法。首先建立开隙电流互感器CT(current transformer)的取能等效模型,推导输出电压和输出功率的表达式。然后根据表达式对磁芯各项参数进行优化设计,分析匝数和负载变化对CT取能性能的影响。通过改变匝数与负载,使得磁芯在大电流取能时CT输出功率偏离最大功率点,从而防止磁芯饱和。利用Saber软件对以上分析及方法进行了仿真验证,结果表明,在一次电流为5 A时,取能线圈可提供78 mW的功率,磁芯在一次电流小于3000 A范围内不发生饱和现象。
The conventional energy-taking power supply has problems such as a small energy-taking range and unstable operation when a large current occurs.Aimed at these problems,an optimal design method for magnetic core parame⁃ters and a saturation suppression method combing multiple turns and parallel resistors are proposed.The equivalent en⁃ergy-taking model of an open-gap current transformer(CT)is established,and the expressions of output voltage and output power are deduced,according to which the magnetic core parameters are optimized.In addition,the influence of changes in turns and load on the CT’s energy-taking performance is analyzed.Through changing the turns and load,the CT output power is deviated from the maximum power point when the magnetic core is taking energy at a large current,thereby suppressing the saturation of magnetic core.The above analysis and method are simulated and verified using the Saber software.When the primary current is 5 A,the energy-taking coil can provide 78 mW power to load,and the mag⁃netic core can still work stably when the primary current is lower than 3000 A without saturation.
作者
周军
马夕峰
乔建
ZHOU Jun;MA Xifeng;QIAO Jian(School of Electrical Engineering,Northeast Electric Power University,Jilin 132000,China;Jilin Power Supply Company,State Grid Jilin Electric Power Co.,Ltd,Jilin 132000,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2023年第7期57-64,共8页
Proceedings of the CSU-EPSA
基金
吉林省科技厅重点科技攻关项目(20170204068GX)。
关键词
取能电流互感器
磁芯参数
输出功率
饱和抑制
SABER仿真
energy-taking current transformer
magnetic core parameter
output power
saturation suppression
Saber simulation
