Analysis of temperature rise characteristics of defective composite insulators based on infrared imaging
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摘要: 基于生产实际,通首至尾地对芯棒-护套气隙、芯棒内部气隙及工艺铁屑内部残留的3类复合绝缘子缺陷进行模拟,搭建高压试验平台对缺陷处进行激发使其产生温升,利用红外检测设备得到复合绝缘子的红外图像,分析不同缺陷类型下的温升特性。结果表明,3种缺陷绝缘子均存在温升现象,但发热现象有所差别,其中工艺铁屑内部残留缺陷温升达到4.5 K,发热区域自金具附近延伸至后两伞裙处,发热现象明显;湿度是影响温升的重要因素,湿度增加35%时芯棒内部缺陷的温升幅值增加73.67%。研究结果可为复合绝缘子内部缺陷红外检测及诊断提供参考。Abstract: In this paper, the defects in three types of composite insulators, namely, core sheath air gap defect, core internal air gap defect and process iron chip internal residual defect, were fabricated manually in the laboratory. High voltage test platform and conduct test. Obtain infrared image of composite insulator using infrared detection equipment. The research shows that the temperature rise of three artificial defect insulators exists. The temperature rise of residual defects in process iron filings reaches 4.5 K, and the heating area extends from near the fittings to two umbrella skirts. When the humidity increases by about 35%, the temperature rise amplitude of the internal defects of the mandrel increases by 73.67%. The research results can provide reference for infrared detection of internal defects of composite insulators on site.
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Keywords:
- infrared imaging /
- composite insulator /
- heat defect /
- thermal mechanism /
- artificial defect
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[1] 张福增,宋磊,李锐海,等.复合绝缘子断裂原因分析及缺陷评价方法[J].高电压技术,2012,38(11):3093-3100. [2] 李特,陶瑞祥,张锐,等.典型发热缺陷复合绝缘子红外特征及无人机红外测试参数选择[J].高电压技术,2022,48(3):865-875. [3] 梁曦东,高岩峰.复合绝缘子酥朽断裂研究(一):酥朽断裂的主要特征、定义及判据[J].中国电机工程学报,2016,36(17):4778-4786. [4] 高岩峰,梁曦东.复合绝缘子酥朽断裂研究(二):酥朽断裂的试验模拟及预防措施讨论[J].中国电机工程学报,2016,36(18):5070-5077,5132. [5] 黄振,张中浩,彭向阳,等.复合绝缘子表面异常发热现象分析及其抑制措施[J].电瓷避雷器,2020(6):171-175,186. [6] YUAN Z K, TU Y P, JIANG H, et al. Study on heating mechanism of GRP rod in a composite insulator[J].IET Science,Measurement & Technology,2019,13(1):108-113.
[7] 卢明,李洋洋,伍川,等.伞裙损伤对不同电压等级棒形悬式复合绝缘子交流污闪特性的影响[J].河南电力,2022(增1):24-29. [8] 李意,雷志勇,李青松.红外检测技术的应用与发展[J].国外电子测量技术,2018,37(2):80-83. [9] 董正华.复合绝缘子使用现状及其在特高压输电线路中的应用前景[J].电子制作,2016(24):35. [10] 樊繁,张艳,张曌.基于红外图像的电力设备分割方法研究[J].国外电子测量技术,2020,39(11):98-101. [11] 安玲,江秀臣,朱宇,等.检测劣质绝缘子的新方法——敏感绝缘子法[J].中国电机工程学报,2002,22(9):108-112. [12] 沈功田,王尊祥.红外检测技术的研究与发展现状[J].无损检测,2020,42(4):1-9,14. [13] 刘颖韬,郭广平,曾智,等.红外热像无损检测技术的发展历程、现状和趋势[J].无损检测,2017,39(8):63-70. [14] 李特,王少华,叶金标,等.含人工缺陷复合绝缘子红外特征试验研究[J].浙江电力,2021,40(4):94-100. [15] 王黎明,付铠玮,梅红伟,等.环境湿度对复合绝缘子红外测温的影响[J].高电压技术,2019,45(6):1955-1961. [16] LIU R, SHEN Q H, LIU H, et al. Discussion on infrared accurate temperature-measuring technology of composite insulators for overhead lines[J]. The Journal of Engineering, 2019, 2019(16): 1759-1762.
[17] 段玉兵,胡晓黎,雍军,等.500kV复合绝缘子现场红外测温方法及诊断判据[J].山东电力技术, 2014,41(4):29-31,48. [18] CHENG L, LIAO R J, YANG L J, et al. An optimized infrared detection strategy for defective composite insulators according to the law of heat flux propagation considering the environmental factors[J].IEEE Access, 2018, 6: 38137-38146.
[19] 彭向阳,黄振,张中浩,等.高湿热地区高温发热复合绝缘子分析[J].智慧电力,2019,47(8):83-90. [20] 贾中伟,黄山,曹宏伟.绝缘子用热硫化硅橡胶注射成型常见缺陷分析[J].有机硅材料,2020,34(4):51-55. [21] 卢明,张中浩,李黎,等.复合绝缘子酥朽发热老化的原因分析[J].电网技术,2018,42(4):1335-1341. [22] 刘辉,沈浩,符一凡,等.工频高压持续时间对不同湿度复合绝缘子芯棒劣化影响研究[J].绝缘材料,2022,55(7):87-92. [23] TU Y P, GONG B, WANG C, et al. Effect of moisture on temperature rise of composite insulators operating in power system[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2015, 22(4): 2207-2213.
[24] LI R H, XU K T, ZHANG F Z, et al. A preliminary study on the impact of environment to the heat of insulator[C]// 2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena. IEEE, 2013: 415-417.
[25] 袁之康.高湿环境下复合绝缘子材料劣化特性及机理[D].北京:华北电力大学,2019. [26] WANG C, LI T F, TU Y P, et al. Heating phenomenon in unclean composite insulators[J]. Engineering Failure Analysis, 2016, 65: 48-56.
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