| 引用本文: | 赵宏飞,马宏忠,李 凯,李 勇,黄朝志,钟 钦.电力变压器油箱固有频率测试及其影响分析[J].电力自动化设备,2013,33(11): |
| ZHAO Hongfei,MA Hongzhong,LI Kai,LI Yong,HUANG Chaozhi,ZHONG Qin.Test and analysis of inherent frequency of power transformer tank[J].Electric Power Automation Equipment,2013,33(11): |
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| 摘要: |
| 首先分析油浸式电力变压器振动产生机理以及油箱壁发生共振现象原因，对常用油浸式电力变压器的油箱壁结构特点进行了分类，提出了振动测点布置的方法。对1台100 kV?A、10 kV／0.4 kV油浸式变压器油箱表面固有频率进行测试，并对所有测点固有频率特性进行分析，并与变压器空载运行时油箱表面测得的振动信号进行比较，由比较可知当使用振动测量法诊断变压器故障时需考虑油箱壁共振现象的影响。 |
| 关键词: 电力变压器 固有频率 振动 共振 故障诊断 测点布置 |
| DOI： |
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| Test and analysis of inherent frequency of power transformer tank |
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ZHAO Hongfei1, MA Hongzhong1, LI Kai2, LI Yong2, HUANG Chaozhi1, ZHONG Qin1
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1.College of Energy and Electrical Engineering，Hohai University，Nanjing 211100，China;2.Jiangsu Nanjing Power Supply Company，State Grid Jiangsu Electric Company，Nanjing 210008，China
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| Abstract: |
| The generation mechanism of oil-immersed power transformer vibration and the cause of its oil tank wall resonance are analyzed. The wall structures of widely-used oil tank for oil-immersed transformer are classified，for which，different disposals of vibration measuring points are proposed. The inherent frequency of a 100 kV?A，10 kV／0.4 kV oil tank wall is tested and analyzed for all measuring points，which is compared with the wall vibration signal measured when transformer operates without load. Results show that，the impact of oil tank wall resonance should be considered when the vibration measurement method is applied in transformer fault diagnosis. |
| Key words: power transformers inherent frequency vibration resonance fault diagnosis measuring point disposal |
