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地线取能TA在冬季常出现输出功率不足的现象，为查找这一现象产生的原因及解决方法，建立现有地线取能TA的有限元模型，并进行有限元热-结构耦合仿真，发现地线取能TA在低温环境中产生变形，这种变形使取能TA的铁芯在结合面分离。结合架空地线感应电流特性及地线取能TA的工作原理，详细分析取能TA变形对输出功率的影响。针对取能TA在低温环境下因变形而在铁芯接触面上产生气隙的问题，提出一种新的TA结构设计方案以减小其低温变形量。经仿真发现，优化后的取能TA受温度影响而产生的变形明显降低。在低温试验箱中对两种取能TA进行低温取能试验，对比两种取能TA的输出，结果表明，优化后的TA能提升地线取能装置在低温条件下输出功率的稳定性。
Abstract：In winter,the output power of the ground wire energy harvesting current transformer(represented as TA)often falls short.To investigate the causes and solutions of this phenomenon,a finite element model of the existing ground wire energy harvesting TA is established and a finite element thermal-structural coupling simulation is conducted.It is found that the ground wire energy harvesting TA deforms in low temperature environments,and this deformation causes the core of the TA to separate at the bonding surface.Based on the characteristics of the induced current in overhead lines and the working principle of the ground wire energy harvesting TA,the influence of the deformation on the output power is analyzed in detail.To address the issue of air gaps forming at the core contact interface of the TA due to deformation in low temperatures,a new TA structure design is proposed to reduce its low-temperature deformation.The simulation shows that the deformation caused by temperature fluctuations in the optimized TA is significantly reduced.Two ground wire energy harvesting TAs are tested for low-temperature energy harvesting in a low-temperature test chamber,and the output results of the two TAs are compared.The results demonstrate that the optimized TA improves the stability of the output power of the ground energy harvesting device under low-temperature conditions.
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基本信息:
DOI：10.20097/j.cnki.issn1007-9904.240438
中图分类号:TM75
引用信息:
[1]赵东生,范亚洲,王开金,等.地线取能装置低温稳定性分析及优化[J].山东电力技术,2025,52(11):33-41.DOI:10.20097/j.cnki.issn1007-9904.240438.
基金信息:
广东电网有限责任公司科技项目（GDKJXM20220853）~~