Dielectric Loss Model of Transformer Oil-Based Nanofluids with ZnO Nanoparticles

doi:10.7652/xjtuxb201402009

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Dielectric Loss Model of Transformer Oil-Based Nanofluids with ZnO Nanoparticles

更新时间：2025-07-09

- Dielectric Loss Model of Transformer Oil-Based Nanofluids with ZnO Nanoparticles
- Vol. 48, Issue 2, Pages: 50-55(2014)
- 作者机构：
  
  西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201402009
  CLC： TM214
- Online First：10 February 2014，
  
  Published：2014
- 稿件说明：
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Dielectric Loss Model of Transformer Oil-Based Nanofluids with ZnO Nanoparticles[J]. 2014, 48(2): 50-55.
DOI：

Dielectric Loss Model of Transformer Oil-Based Nanofluids with ZnO Nanoparticles[J]. 2014, 48(2): 50-55. DOI： 10.7652/xjtuxb201402009.

摘要

为了了解添加纳米颗粒对变压器油介质损耗角正切值的影响情况

采用ZnO半导体纳米颗粒制备改性变压器油

在此基础上

研究了纳米改性变压器油介质损耗角正切值随纳米颗粒体积分数和环境温度的变化规律

提出了基于电导损耗和纳米颗粒松弛极化损耗的理论模型

并用来解释纳米改性变压器油介质损耗角正切值的变化机理。实验结果表明

添加ZnO纳米颗粒将明显增大纳米改性变压器油的介质损耗角正切值

且介质损耗角正切值随纳米颗粒体积分数线性增长

随环境温度呈指数型增大; 同时所提模型的计算值较好地吻合了实验测量数据。进一步分析表明

ZnO纳米颗粒改性变压器油介质损耗角正切值主要取决于电导损耗

纳米颗粒松弛极化损耗的影响很小。

Abstract

A new kind of transformer oil-based nanofluids(NFs)with ZnO semiconducting nanoparticles is prepared to investigate the influences of adding nanoparticles on dielectric loss tangent of transformer oil. The mechanism on how the nanoparticle volumetric concentration and environmental temperature affect the NF dielectric loss tangent is also discussed. A new dielectric loss model based on conduction loss and nanoparticle relaxation loss is proposed. The experiments show that the ZnO NF dielectric loss tangent linearly increases with the nanoparticle volumetric concentration and exponentially increases with the temperature. Meanwhile the calculation of dielectric loss model coincides well with the experiments. The further analysis suggests that for ZnO NFs the dielectric loss tangent is dominantly determined by conduction loss

and the influence of nanoparticle relaxation loss is slight.

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references

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