造纸用水电导率对油纸绝缘电气特性的影响

发布时间：2018-05-11 07:38

本文选题：水电导率 + 变压器　；参考：《高电压技术》2015年02期

【摘要】：水在纸的制造过程中发挥了关键作用。为探究水电导率对油纸绝缘电气性能的影响,分别利用电导率为3μS/cm的纯净水和电导率为100μS/cm,500μS/cm和1 000μS/cm的氯化钠溶液制备绝缘纸,进而得到油纸试样。对所得试样,测试电导电流、体积电阻率、介电特性和击穿特性。结果表明:随着造纸用水电导率的增加,油纸试样的电导电流上升,体积电阻率下降,介质损耗角正切值增大;交流击穿场强没有显著变化而直流击穿场强从90 kV/mm下降到72 kV/mm。利用离子色谱仪分析绝缘纸中钠离子和氯离子的质量分数,发现离子质量分数随水电导率的增加而升高。由此得出,造纸过程中随着水电导率增加,纸中残留的离子含量增加,从而引起油纸绝缘部分电气性能的变化。
[Abstract]:Water plays a key role in the manufacture of paper. In order to investigate the effect of water conductivity on the electrical properties of oil-paper insulation, the insulating paper was prepared by using purified water with electrical conductivity of 3 渭 S/cm and sodium chloride solution with conductivity of 100 渭 S / cm ~ (-1) 500 渭 S/cm and 1 000 渭 S/cm respectively. The conductance current, volume resistivity, dielectric properties and breakdown characteristics of the samples were measured. The results show that with the increase of the electric conductivity of paper water, the conductance current increases, the volume resistivity decreases, the dielectric loss angle tangent increases, and the DC breakdown field strength decreases from 90 kV/mm to 72 kV / mmm. Ion chromatograph was used to analyze the mass fraction of sodium ion and chloride ion in insulator paper. It was found that the mass fraction of ion increased with the increase of water conductivity. It is concluded that with the increase of water conductivity in papermaking process, the residual ion content in paper increases, which results in the change of electrical properties of oil paper insulation.
【作者单位】：清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室;华北电力科学研究院有限责任公司;
【基金】：国家重点基础研究发展计划(973计划)(2011CB209400)~~
【分类号】：TM215.6

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