Space charge inhibition effect of nano-Fe3O4 on improvement of impulse breakdown voltage of transformer oil based on improved Kerr optic measurements

Space charge inhibition effect of nano-Fe3O4 on improvement of impulse breakdown voltage of transformer oil based on improved Kerr optic measurements
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基于改进克尔光学测量纳米Fe3O4对提高变压器油冲击击穿电压的空间电荷抑制作用

DOI:
10.1063/1.4931947
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发表时间:
2015-09
期刊:
影响因子:
1.6
通讯作者:
Zahn, Markus
Zahn, Markus
中科院分区:
材料科学4区
文献类型:
--
作者:
Yang, Qing;Yu, Fei;Sima, Wenxia;Zahn, Markus

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Fe3O4 纳米颗粒含量为 0.03 g/L 的变压器油基纳米流体 (NF) 的正脉冲击穿电压水平比纯变压器油高 11.2%。为了研究Fe3O4纳米颗粒对变压器油中空间电荷的影响并解释为什么纳米改性变压器油表现出改善的脉冲击穿电压特性,通过增加平行板电极的长度和使用光电探测器阵列作为高光灵敏度器件来改进传统的Kerr电光场映射技术。纯变压器油和含有 Fe3O4 纳米颗粒的 NF 的空间电荷分布可以使用改进的 Kerr 电光场映射技术进行测量。测试结果表明,含有 Fe3O4 纳米颗粒的变压器油基 NF 中的空间电荷密度显着降低。快电子被纳米粒子捕获并转化为 NF 中的慢带电粒子,从而减少空间......
Transformer oil-based nanofluids (NFs) with 0.03 g/L Fe3O4 nanoparticle content exhibit 11.2% higher positive impulse breakdown voltage levels than pure transformer oils. To study the effects of the Fe3O4 nanoparticles on the space charge in transformer oil and to explain why the nano-modified transformer oil exhibits improved impulse breakdown voltage characteristics, the traditional Kerr electro-optic field mapping technique is improved by increasing the length of the parallel-plate electrodes and by using a photodetector array as a high light sensitivity device. The space charge distributions of pure transformer oil and of NFs containing Fe3O4 nanoparticles can be measured using the improved Kerr electro-optic field mapping technique. Test results indicate a significant reduction in space charge density in the transformer oil-based NFs with the Fe3O4 nanoparticles. The fast electrons are captured by the nanoparticles and are converted into slow-charged particles in the NFs, which then reduce the space ...
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