平腕臂绝缘子表面的沙尘沉积特性仿真分析
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摘要
兰新高铁接触网平腕臂绝缘子在大风沙尘环境中面临"沙闪"问题,研究不同因素下平腕臂绝缘子表面的沙尘沉积特性,可为此环境下绝缘子选型及设计提供理论依据。以FQBJ-25型棒式瓷芯复合绝缘子为研究对象,建立风洞积污仿真模型,采用多场耦合的数值计算方法分析风速、颗粒物粒径及质量浓度3种因素对绝缘子表面积污量的影响。仿真结果表明:随着风速的增大,绝缘子和各个伞裙表面的积污量均增加;当颗粒粒径大于13μm时,各个伞裙表面沉积的颗粒个数随粒径的增大而减少,但绝缘子表面的积污量随粒径的增大而增大;颗粒物质量浓度对绝缘子表面积污量的影响呈线性关系。各个伞裙表面积污量的变化与伞裙结构、风速、粒径及质量浓度有关,当曵力大于重力(大风速小粒径)时,伞裙结构的变化与各个伞裙表面积污量的变化具有一致性,反之,伞裙结构对积污量的变化影响很小。当曵力与重力作用相当时,颗粒物质量浓度越高,伞裙结构对各个伞裙表面积污量的影响越明显。
The catenary flat cantilever insulators of Lanzhou-Urumqi high-speed railway are facing the problem of sand flash in strong wind and sand-dust environment. The study of the deposition characteristics of sand-dust on the surface of the insulator under different environmental factors can provide a theoretical basis for the insulator selection and design. In this paper, the common FQBJ-25 type porcelain core composite insulator is taken as the research object, and the simulation model of the wind tunnel pollution is established. The influence of wind speed, particle size and mass concentration on the quality of contamination of the insulator surface is analyzed by multi-field coupled numerical method. The results show that the quality of contamination on the surface of insulator and sheds increases with the increase of wind speed. When the particle size is more than 13μm, the number of particles deposited on each shed surface decreases with the increase of the particle size, but the quality of contamination on the insulator surface increases. The relationship between the mass concentration of particles and the quality of contamination on the insulator surface is linear. The variation of the quality of contamination on each shed surface is related to the structure of sheds, wind speed, particle size and mass concentration. When the drag force is greater than the gravity(high wind speed, small particle size), the change of the structure of the sheds is consistent with the variation of the quality of contamination on the each shed surface,and on the contrary, the structure of sheds has little influence on the distribution of the quality of contamination.When the drag force is equal to the gravity, the mass concentration of particles is higher, the influence of sheds structure to the quality of contamination on each shed surface is more obvious.
The catenary flat cantilever insulators of Lanzhou-Urumqi high-speed railway are facing the problem of sand flash in strong wind and sand-dust environment. The study of the deposition characteristics of sand-dust on the surface of the insulator under different environmental factors can provide a theoretical basis for the insulator selection and design. In this paper, the common FQBJ-25 type porcelain core composite insulator is taken as the research object, and the simulation model of the wind tunnel pollution is established. The influence of wind speed, particle size and mass concentration on the quality of contamination of the insulator surface is analyzed by multi-field coupled numerical method. The results show that the quality of contamination on the surface of insulator and sheds increases with the increase of wind speed. When the particle size is more than 13μm, the number of particles deposited on each shed surface decreases with the increase of the particle size, but the quality of contamination on the insulator surface increases. The relationship between the mass concentration of particles and the quality of contamination on the insulator surface is linear. The variation of the quality of contamination on each shed surface is related to the structure of sheds, wind speed, particle size and mass concentration. When the drag force is greater than the gravity(high wind speed, small particle size), the change of the structure of the sheds is consistent with the variation of the quality of contamination on the each shed surface,and on the contrary, the structure of sheds has little influence on the distribution of the quality of contamination.When the drag force is equal to the gravity, the mass concentration of particles is higher, the influence of sheds structure to the quality of contamination on each shed surface is more obvious.
引文
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[9]贺博,陈邦发,高乃奎,等.沙尘微粒在硅橡胶绝缘材料表面的沉降模型[J].西安交通大学学报, 2009,43(12):86-90.HE Bo, CHEN Bangfa, GAO Naikui, et al. A model for sand/dust deposition on the surface of silicon rubber[J].Journal of Xi’an Jiaotong University, 2009, 43(12):86-90.
[10]阳林,郝艳捧,李立浧,等.沙尘暴条件下长棒形瓷绝缘子风洞带电积污试验[J].高电压技术, 2010, 36(11):2651-2656.YANG Lin, HAO Yanpeng, LI Licheng, et al. Wind tunnel test for contamination deposited characteristics of porcelain long rod insulators under sandstorm circumstance[J]. High Voltage Engineering, 2010, 36(11):2651-2656.
[11]陈邦发,林秀钦,吴沃生.沙尘颗粒在绝缘子表面沉积的三维仿真研究[J].变压器, 2013, 50(3):26-31.CHEN Bangfa, LIN Xiuqin, WU Wosheng. 3D simulation and research of dust particle deposition on surface of insulator[J]. Transformer, 2013, 50(3):26-31.
[12]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.污秽条件下使用的高压绝缘子的选择和尺寸确定第1部分:定义、信息和一般原则:GB/T 26218.1—2010[S].北京:中国标准出版社, 2011.General Administration of Quality Supervision,Inspectionand Quarantine of the People’s Republic of China, Standardization Administration of the People’s Republic of China. GB/T 26218.1—2010 selection and dimensioning of high-voltage insulators intended for use in polluted conditions-part 1:definitions, information and general principles[S]. Beijing:Standards Press of China,2011.
[13]中华人民共和国铁道部.电气化铁路接触网用绝缘子第2部分:棒形复合绝缘子:TB/T 3199.2—2008[S].北京:中国铁道出版社, 2008:2-26.Ministry of Railways of the People’s Republic of China.TB/T 3199.2—2008 insulators for overhead contact system of electrified railways second part:rod composite insulator[S]. Beijing:China Railway Press, 2008:2-26.
[14] Hongmin L, LIAN Z, NI J, et al. Theoretic analysis of computational fluid dynamics model in Indoor air quality and thermal comfort[J]. Fluid Machinery, 2003, 31(2):53-53.
[15] SUN J, WU G, CHEN W, et al. Dynamic simulation analysis of bar insulator pollution in strong wind[J].Journal of Southwest Jiaotong University, 2012, 47(3):413-419.
[16]王黎明,刘霆,梅红伟.基于计算流体力学的支柱绝缘子积污特性研究[J].高电压技术, 2015, 41(8):2742-2749.WANG Liming, LIU Ting, MEI Hongwei, et al. Research on contamination deposition characteristics of post insulator based oncomputational fluid dynamics[J]. High Voltage Engineering, 2015, 41(8):2742-2749.
[17] Ellenbecker M J, Leith D. The effect of dust retention on pressure drop in a high velocity pulse-jet fabric filter[J].Powder Technology, 1980, 25(2):147-154.
[18]朱彦.兰新高速线动车组设计环境参数探讨[J].大连交通大学学报, 2014, 35(5):25-28.ZHU Yan. Research of environmental parameters on the EMU design of Lanzhou-Xinjiang high-speed railway[J].Journal of Dalian Jiaotong University, 2014, 35(5):25-28.
[19]郑晓静,黄宁,周又和.风沙运动的沙粒带电机理及其影响的研究进展[J].力学进展, 2004, 34(1):77-86.ZHENG Xiaojing, HANG Ning, ZHOU Youhe. Advances in investigation on electrification of wind-blown sands and its effects[J]. Advances in Mechanics, 2004, 34(1):77-86.
[20]屈建军,言穆弘,董光荣,等.沙尘暴起电的风洞模拟实验研究[J].中国科学, 2003, 33(6):593-601.QU Jianjun, YAN Muhong, DONG Guangrong, et al.Summary on wind tunnel simulation experiment study of sandstorm electrification[J]. Chinese Science, 2003, 33(6):593-601.
[2] ZHANG Z, YOU J, ZHAO J, et al. Contamination characteristics of discsuspension insulator of transmission line in wind tunnel[J]. Iet Generation Transmission&Distribution, 2017, 11(6):1453-1460.
[3]孙继星,徐跃,胡学永,等.高速气流环境中电气化铁路绝缘子表面积污分布特性[J].高电压技术, 2014,40(1):96-101.SUN Jixing, XU Yue, HU Xueyong, et al. Characteristics of pollution distribution on insulators nearby electrified railroad in high-speed aerosol[J]. High Voltage Engineering, 2014, 40(1):96-101.
[4] LI Ziming, LI Wenmiao, WANG Z, et al. Contamination characteristics of AC composite insulator in high-cold area[J]. High Voltage Apparatus, 2017, 53(5):96-102.
[5] ZHANG C. Research on pollution flashover characteristics of large-size composite outdoor insulation for UHV DC in high altitude area[J]. Transactions of China Electrotechnical Society, 2012, 27(12):20-28.
[6]屠幼萍,孙佑飞,彭庆军,等.雾霾环境下自然积污绝缘子的污秽颗粒粒径分布特性[J].高电压技术, 2014,40(11):3318-3326.TU Youping, SUN Youfei, PENG Qingjun, et al. Particle size distribution characteristics of naturally polluted insulators under the fog-haze environment[J]. High Voltage Engineering, 2014, 40(11):3318-3326.
[7]徐森,仵超,李少华,等.雾霾期间绝缘子的积污特性研究[J].中国电机工程学报, 2017, 37(7):2142-2150.XU Sen, WU Chao, LI Shaohua, et al. Research on pollution accumulation characteristics of insulators during fog-haze days[J]. Proceedings of the CSEE, 2017,37(7):2142-2150.
[8]贺博,万军,陈邦发,等.人工模拟沙尘气候环境下线路绝缘子积污特性研究[J].西安交通大学学报, 2008,42(12):1510-1514.HE Bo, WAN Jun, CHEN Bangfa, et al. Contamination deposition characteristics of suspension insulations under sand-storm circumstance simulated artificially[J]. Journal of Xi’an Jiaotong University, 2008, 42(12):1510-1514.
[9]贺博,陈邦发,高乃奎,等.沙尘微粒在硅橡胶绝缘材料表面的沉降模型[J].西安交通大学学报, 2009,43(12):86-90.HE Bo, CHEN Bangfa, GAO Naikui, et al. A model for sand/dust deposition on the surface of silicon rubber[J].Journal of Xi’an Jiaotong University, 2009, 43(12):86-90.
[10]阳林,郝艳捧,李立浧,等.沙尘暴条件下长棒形瓷绝缘子风洞带电积污试验[J].高电压技术, 2010, 36(11):2651-2656.YANG Lin, HAO Yanpeng, LI Licheng, et al. Wind tunnel test for contamination deposited characteristics of porcelain long rod insulators under sandstorm circumstance[J]. High Voltage Engineering, 2010, 36(11):2651-2656.
[11]陈邦发,林秀钦,吴沃生.沙尘颗粒在绝缘子表面沉积的三维仿真研究[J].变压器, 2013, 50(3):26-31.CHEN Bangfa, LIN Xiuqin, WU Wosheng. 3D simulation and research of dust particle deposition on surface of insulator[J]. Transformer, 2013, 50(3):26-31.
[12]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.污秽条件下使用的高压绝缘子的选择和尺寸确定第1部分:定义、信息和一般原则:GB/T 26218.1—2010[S].北京:中国标准出版社, 2011.General Administration of Quality Supervision,Inspectionand Quarantine of the People’s Republic of China, Standardization Administration of the People’s Republic of China. GB/T 26218.1—2010 selection and dimensioning of high-voltage insulators intended for use in polluted conditions-part 1:definitions, information and general principles[S]. Beijing:Standards Press of China,2011.
[13]中华人民共和国铁道部.电气化铁路接触网用绝缘子第2部分:棒形复合绝缘子:TB/T 3199.2—2008[S].北京:中国铁道出版社, 2008:2-26.Ministry of Railways of the People’s Republic of China.TB/T 3199.2—2008 insulators for overhead contact system of electrified railways second part:rod composite insulator[S]. Beijing:China Railway Press, 2008:2-26.
[14] Hongmin L, LIAN Z, NI J, et al. Theoretic analysis of computational fluid dynamics model in Indoor air quality and thermal comfort[J]. Fluid Machinery, 2003, 31(2):53-53.
[15] SUN J, WU G, CHEN W, et al. Dynamic simulation analysis of bar insulator pollution in strong wind[J].Journal of Southwest Jiaotong University, 2012, 47(3):413-419.
[16]王黎明,刘霆,梅红伟.基于计算流体力学的支柱绝缘子积污特性研究[J].高电压技术, 2015, 41(8):2742-2749.WANG Liming, LIU Ting, MEI Hongwei, et al. Research on contamination deposition characteristics of post insulator based oncomputational fluid dynamics[J]. High Voltage Engineering, 2015, 41(8):2742-2749.
[17] Ellenbecker M J, Leith D. The effect of dust retention on pressure drop in a high velocity pulse-jet fabric filter[J].Powder Technology, 1980, 25(2):147-154.
[18]朱彦.兰新高速线动车组设计环境参数探讨[J].大连交通大学学报, 2014, 35(5):25-28.ZHU Yan. Research of environmental parameters on the EMU design of Lanzhou-Xinjiang high-speed railway[J].Journal of Dalian Jiaotong University, 2014, 35(5):25-28.
[19]郑晓静,黄宁,周又和.风沙运动的沙粒带电机理及其影响的研究进展[J].力学进展, 2004, 34(1):77-86.ZHENG Xiaojing, HANG Ning, ZHOU Youhe. Advances in investigation on electrification of wind-blown sands and its effects[J]. Advances in Mechanics, 2004, 34(1):77-86.
[20]屈建军,言穆弘,董光荣,等.沙尘暴起电的风洞模拟实验研究[J].中国科学, 2003, 33(6):593-601.QU Jianjun, YAN Muhong, DONG Guangrong, et al.Summary on wind tunnel simulation experiment study of sandstorm electrification[J]. Chinese Science, 2003, 33(6):593-601.
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