郝建;徐瑞林;George Chen;廖瑞金;伏进;吴高林;王谦;

• 1:重庆市电力公司电力科学研究院
• 2:南安普顿大学电子与计算机科学学院
• 3:输配电装备及系统安全与新技术国家重点实验室(重庆大学)

摘要(Abstract)：

绝缘材料在交流电压下的空间电荷特性和直流电压下的空间电荷特性同等重要。输电系统中交流变压器的数量巨大,变压器内绝缘用油纸绝缘材料在交流电压下的空间电荷特性如何,尚未见研究报道。首先采用直流电声脉冲测试系统研究了油浸绝缘纸在正/负极性直流场强下的空间电荷特性,然后采用改进的基于电声脉冲法的空间电荷测试系统研究了油浸绝缘纸在工频电压下的空间电荷特性。结果表明:电场极性对油浸绝缘纸内部的空间电荷分布有决定性影响,在正极性直流场强下,积聚在靠近铝板电极侧绝缘纸-绝缘纸界面处的电荷极性是正极性,而在负极性直流场强下,其是负极性;在工频加压的正半周,铝板电极处的电荷极性为负,而在工频加压的负半周,铝板电极处的电荷极性为正,90和270相位下油浸绝缘纸内部界面处积聚的电荷极性相反;与直流电压下相比,工频电压下油浸绝缘纸内部积聚的电荷显著减少。

关键词(KeyWords)： 油浸纸绝缘;电声脉冲法;空间电荷;直流电压;工频电压

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 郝建;徐瑞林;George Chen;廖瑞金;伏进;吴高林;王谦;

Email:

DOI: 10.13335/j.1000-3673.pst.2013.04.020

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