| 基于变频电源的电流互感器局放试验抗干扰 |
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| 引用本文： | 张寒,刘卫东,傅志扬,汤美云,雷文辉. 基于变频电源的电流互感器局放试验抗干扰[J]. 高电压技术, 2009, 35(4): 889-893 |
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| 作者姓名： | 张寒 刘卫东 傅志扬 汤美云 雷文辉 |
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| 作者单位： | 张寒,刘卫东,傅志扬,雷文辉,ZHANG Han,LIU Wei-dong,FU Zhi-yang,LEI Wen-hui(湖南省电力公司超高压管理局,长沙,410014);汤美云,TANG Mei-yun(湖南省电力公司,长沙,410007) |
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| 基金项目： | 国家电网公司重点科技项目 |
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| 摘 要： | 为了实现变频电源供电方式下的电流互感器局部放电试验,解决各类背景干扰问题,分析了高压大厅内辐射和传导干扰的波形和相位特征、电源回路与试验回路干扰的区别。通过对变频柜滤波、屏蔽改造以及高压试验装置无局放处理,采用单点接地与分开接地相结合以及平衡法检测回路,实现了整套装置的背景噪声的局部放电量<5pC,满足对500/220kV电流互感器的局放试验要求,并通过试验发现一处500kV倒立式油浸电流互感器绝缘缺陷。分析表明,经过降噪处理后,变频电源供电方式能获得常规工频电源等同的局放效果,其措施也可指导现场试验。
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| 关 键 词： | 局部放电 抗干扰 电流互感器 变频电源 平衡法 接地 |
Anti-interference in Partial Discharge Test for Current Transformer Supplied with Variable-frequency Power |
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| ZHANG Han,LIU Wei-dong,FU Zhi-yang,TANG Mei-yun,LEI Wen-hui. Anti-interference in Partial Discharge Test for Current Transformer Supplied with Variable-frequency Power[J]. High Voltage Engineering, 2009, 35(4): 889-893 |
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| Authors: | ZHANG Han LIU Wei-dong FU Zhi-yang TANG Mei-yun LEI Wen-hui |
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| Affiliation: | 1. EHV Administration of Hunan Electric Power Corporation;Changsha 410014;China;2. Hunan Electric Power Corporation;Changsha 410007;China |
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| Abstract: | Interference must be removed in partial discharge test for current transformer supplied with variable-frequency power source, which has the merits such as small capacity, low cost, no magnetic saturation and so on relative to conventional power frequency source. In this paper, the waveform and phase features of both radiation interference and conduction interference in high-voltage hall are analyzed. When test is conducted, the phase angel of the interference come from experimental loop is invariable while ... |
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| Keywords: | partial discharge anti-interference current transformer variable-frequency power balance method grounding |
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