| 换流变压器油纸绝缘复合电场击穿特性及其试验方法 |
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| 引用本文： | 王永红,魏新劳,陈庆国.换流变压器油纸绝缘复合电场击穿特性及其试验方法[J].高电压技术,2011,37(9). |
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| 作者姓名： | 王永红 魏新劳 陈庆国 |
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| 作者单位： | 哈尔滨理工大学电气与电子工程学院,哈尔滨,150040 |
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| 基金项目： | 国家自然科学基金(50877020); 黑龙江省新世纪优秀人才支持计划(NCET2062008)~~ |
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| 摘 要： | 为了查明换流变压器油纸绝缘在交流叠加直流电场下的击穿特性,利用交流、直流及交流叠加直流等复合电场,对油隙、浸油纸板和油纸复合绝缘进行了击穿试验研究。结果表明：油隙的击穿场强几乎不随交流电压分量变化;浸油纸板击穿场强随交流电压分量增加迅速下降;受浸油纸板击穿特性影响,油纸复合绝缘击穿场强随交流电压分量减小明显提高。说明油隙的击穿场强与交流电压分量基本无关,但浸油纸板的击穿场强受交流电压分量影响严重。依据试验结果,进一步对换流变压器交流和直流电压试验项目的有效性进行了讨论。经分析发现换流变压器主绝缘的油隙与浸油纸板在运行电压下出现的最高电压仍为交流叠加直流电压。交流和直流电压试验的电压幅值能够满足要求,但电压波形与承受的运行电压相差较大。认为交流电压试验考核油隙绝缘介电强度是有效的,而直流电压试验考核浸油纸板绝缘介电强度并不充分。
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| 关 键 词： | 高压直流 换流变压器 油纸绝缘 复合电场 击穿场强 交流电压试验 直流电压试验 |
Breakdown Characteristics of Oil-pressboard Insulation in Converter Transformer Under Composite Electric Field and Its Test Method |
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| WANG Yong-hong,WEI Xin-lao,CHEN Qing-guo.Breakdown Characteristics of Oil-pressboard Insulation in Converter Transformer Under Composite Electric Field and Its Test Method[J].High Voltage Engineering,2011,37(9). |
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| Authors: | WANG Yong-hong WEI Xin-lao CHEN Qing-guo |
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| Affiliation: | WANG Yong-hong,WEI Xin-lao,CHEN Qing-guo(College of Electrical & Electronic Engineering,Harbin University of Science and Technology,Harbin 150040,China) |
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| Abstract: | In order to achieve the breakdown characteristics of the oil-pressboard insulation in converter transformer under combined AC-DC electric field,breakdown characteristics of transformer oil gap,oil-impregnated pressboard and oil-pressboard complex insulation under composite electric fields,including AC,DC and combined AC-DC electric field,are tested.Results show that breakdown field strength of oil gap hardly changes with the variation of AC voltage components.Breakdown field strength of oil-impregnated pres... |
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| Keywords: | HVDC converter transformer oil and pressboard insulation composite electric field breakdown field strength AC voltage test DC voltage test |
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