回复电压微分谱线特性的变压器绝缘老化研究
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1.厦门理工学院电气工程与自动化学院 高电压技术福建省重点实验室厦门361024;2. 福建省电力物资有限公司福州350003;3. 国网福建省电力有限公司经济技术研究院福州350012;4.国网安阳供电公司安阳455000

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TH183TM411

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国家自然科学基金青年基金(51407151)、福建省自然科学基金(2015J05113)项目资助


Insulation aging of transformer based on recovery voltage differential spectrum line characteristic
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1. Highvoltage Key Laboratory of Fujian Province, College of Electrical Engineering and Automation, Xiamen University of Technology, Xiamen 361024,China;2.Fujian Electric Power supplies Limited, Fuzhou 350003,China;3. State Grid Fujian Economic Research Institute, Fuzhou 350012, China;4. State Grid Anyang Power Supply Company ,Anyang 455000, China

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    摘要:

    针对油纸绝缘变压器老化会对其等效电路产生影响,通过分析回复电压谱线与等效电路参数的函数关系,提出回复电压微分解谱法确定等效电路极化支路数,解决了长期以来变压器等效电路极化支路数难以确定的问题,为准确诊断变压器绝缘状态奠定重要基础。通过实例验证表明:利用回复电压微分解谱法能够准确判定等效电路的极化支路数,能更准确地反映变压器绝缘老化状况,且变压器绝缘老化越严重,其回复电压微分谱线子谱线个数和等效电路的极化支路数越多。

    Abstract:

    To avoid the impact of oilpaper insulation transformers’ aging on its equivalent circuit, the recovery voltage differential spectrum solution method is proposed to determine the number of equivalent circuit’s polarization branches by analyzing the functional relation between the recovery voltage spectrum line and the parameters of the equivalent circuit. The proposed method solves the longtime knotty problem in determining the number of polarized branches of the equivalent circuit, laying a solid foundation for diagnosing the insulation state of the transformer accurately. Case studies show that the number of polarization branches of the equivalent circuit can be determined accurately and the insulation aging condition of the transformer is reflected more accurately by using the recovery voltage differential analysis method. Moreover, the number of the differential spectrum lines and polarization branches becomes larger when the transformer insulation aging becomes worse.

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林智勇,张达敏,黄国泰,薛尚青,李君.回复电压微分谱线特性的变压器绝缘老化研究[J].仪器仪表学报,2017,38(8):1954-1960

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  • 在线发布日期: 2017-09-04
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