一种基于视频图像识别的输电线路屏蔽环振动频率监测方法
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摘要
针对输电线路屏蔽环振动频率监测困难的问题,提出一种非接触式振动频率识别方法。以某已建成特高压线路屏蔽环为例,进行振动频率识别,并采用精细化有限元方法对屏蔽环进行模态分析,验证了该方法的可行性。分析表明:屏蔽环振动频率图像识别方法与有限元方法计算频率接近,能使用图像识别方法对输电线路屏蔽环进行振动频率识别。
In order to monitor the vibration frequency of shielding ring of transmission lines, a non-contact vibration frequency identification method is proposed. Taking a shield ring of an ultra-high voltage(UHV) transmission line as an example, the method of image recognition is used to recognize the vibration frequency, and the finite element method is used to verify the feasibility of the proposed method. The analyzing results show that the frequency obtained by two different methods are close, and the image recognition method can be used to identify the vibration frequency of shielding ring of transmission lines.
In order to monitor the vibration frequency of shielding ring of transmission lines, a non-contact vibration frequency identification method is proposed. Taking a shield ring of an ultra-high voltage(UHV) transmission line as an example, the method of image recognition is used to recognize the vibration frequency, and the finite element method is used to verify the feasibility of the proposed method. The analyzing results show that the frequency obtained by two different methods are close, and the image recognition method can be used to identify the vibration frequency of shielding ring of transmission lines.
引文
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[2]徐光辉.800 kV隔离开关屏蔽环设计[J].高压电器,2006,42(5):337–339.XU Guanghui.Design of the shielding ring of 800 kV disconnector[J].High Voltage Apparatus,2006,42(5):337–339.
[3]李延章.330 kV输电线路悬垂绝缘子串取消均压屏蔽环的试验研究[J].中国电力,1995(9):68–70.LI Yanzhang.330 kV transmission line cancel the equalizing suspension insulator string shield ring test research[J].Electric Power,1995(9):68–70.
[4]刘振亚.中国特高压交流输电技术创新[J].电网技术,2013,37(3):556–574.LIU Zhenya.Innovation of UHVAC transmission technology in China[J].Power System Technology,2013,37(3):556–574.
[5]DL/T760.3—2012.均压环、屏蔽环和均压屏蔽环[S].北京:中国电力出版社.2012.12.
[6]董晓虎,雷成华,李荣超等.1 000 kV南荆一回管型硬跳线屏蔽环脉动风振分析[J].水电与新能源,2017(3):48–51.DONG Xiaohu,LEI Chenghua,LI Rongchao,et al.Fluctuating wind vibration analysis of the tubular rigid jumper shielding ring in the1 000 kV Nan Jing loop line[J].Hydropower and New Energy,2017(3):48–51.
[7]董晓虎,徐天勇,雷成华等.1 000 kV南荆一回管型硬跳线屏蔽环静力风载分析[J].水电与新能源,2016(10):1–3,12.DONG Xiaohu,XU Tianyong,LEI Chenghua,et al.1000 kv Nan jing once tube type jumper wire shield ring static wind load analysis[J].Hydropower and New Energy,2016(10):1–3,12.
[8]黄文.数字图像处理技术在梁索结构振动测试中的应用研究[D].广州:广州大学,2011.
[9]孙凤杰,齐京亮,李媛媛等.输电线路视频图像识别管理系统[J].中国电力,2013,46(4):83–88.SUN Fengjie,QI Jingliang,LI Yuanyuan,et al.Video and image identification management system for transmission lines[J].Electric Power,2013,46(4):83–88.
[10]罗朝祥,万华舰,罗文博等.输电线路导线覆冰图像处理与识别技术[J].中国电力,2014,47(9):132–136.LUO Chaoxiang,WANG Huajian,LUO Wen-bo,et al.Image processing and recognition technology for transmission line icing[J].Electric power,2014,47(9):132–136.
[11]陈桂明,张明照,戚红雨.应用Matlab语言处理数字信号与数字图像[M].北京:科学技术出版社,2000.
[12]王积分,张新荣.计算机图像识别[M].北京:中国铁道出版社,1988.
[13]张成,盛戈嗥,江秀臣等.基于图像处理技术的绝缘子覆冰自动识别[J].华东电力,2009,37(1):146–149.ZHANG Cheng,SHENG Gegao,JIANG Xiuchen,et al.Application of digital image processing to insulator icing identification[J].East China Electric Power,2009,37(1):146–149.
[14]李昭廷,郝艳捧,李丽澄等.利用远程系统的输电线路覆冰厚度图像识别[J].高电压技术,2011,37(9):2288–2293.LI Zhaoting,HAO Yanpeng,LI Licheng,et al.Image recognition of ice thickness on transmission lines using remote system[J].High Voltage Engineering,2011,37(9):2288–2293.
[15]林莘,李丹,徐建源.800 kV GIS高压开关设备抗震性能分析[J].高压电器,2015,51(5):8–12.LIN Xing,LI Dan,XU Jianyuan.Analysis on seismic performance of800 kV gas insulated switchgear(GIS)[J].High Voltage Apparatus,2015,51(5):8–12.
[16]孔德怡,李黎.特高压架空输电线路微风振动有限元分析[J].振动与冲击,2007,26(8):64–67.KONG Deyi,LI Li.Analysis of aeolian vibration of UHV transmission conductor by finite element method[J].Journal of Vibration and Shock,2007,26(8):64–67.
[17]齐翼,芮晓明,朱宽军等.特高压大跨越输电线路防振设计系统的研究[J].中国电力,2017,50(2):5–10.QI Yi,RUI Xiaoming,ZHU Kuanjun,et al.Research on antivibration design system for UHV large crossing transmission line[J].Electric power,2017,50(2):5–10.
[18]刘晶波.结构动力学[M].北京:机械工业出版社,2005.
[19]郑雷.输电杆塔振动识别方法研究与应用[D].武汉:武汉科技大学,2014.
[20]杨风利,党会学,杨靖波,等.500 kV输电线路塔线体系舞动响应分析[J].中国电力,2015,48(7):139–145.YANG Fengli,DANG Huixue,YANG Jingbo,et al.Analysis on the dynamic responses of tower-line system of 500 kV transmission line with galloping conductors[J].Electric Power,2015,48(7):139–145.