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| Prediction of Conductor Corona Onset Voltage Based on Condensation-Distribution Model under High Humidity Conditions |
| Hu Qin1, He Gaohui1, Peng Huadong2, Li Yongfu2, Shu Lichun1 |
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing400044 China;
2. State Grid Electric Power Research Institute of Chongqing Electric Power Company Chongqing 401123 China |
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Abstract Humidity has a significant influence on the corona onset voltage of conductor.The presented paper constructs a condensation-distribution model based on quadri-thermal resistance heat transfer model and fractal theory under high humidity circumstance, and calculates the dimensions of the maximum dewdrop and the distribution regularities of dewdrop under various conductor temperature and humidity conditions, which are agree with the test results of metallographic microscope. The parameters derived from the condensation-distribution model are used to calculate the electric field intensity distribution of conductors, and input the results of electric field intensity distribution into a corona photoionization model to obtain the corresponding corona onset voltage.The higher of the humidity or the temperature differences between conductor and circumstance, the smaller of the corona onset voltage, and when the relative humidity reaches 80%, the corresponding corona inception voltage tends to saturate. Comparing the prediction results of corona onset voltage with experiments results, the errors are less than 5%. Therefore, the proposed method could be applied on the corona onset voltage prediction of conductors under high humidity circumstance.
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Received: 08 February 2017
Published: 12 April 2018
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[1] 周顺武, 马悦, 宋瑶, 等. 中国东部地区冬季和夏季地面湿度空间分布特征的对比分析[J]. 气候与环境研究, 2015, 20(5):589-599.
Zhou Shunwu, Ma Yue, Song Yao, et al.Comparison between the spatial distribution of surface humidity in winter and summer over east China[J]. Climatic and Environmental Research, 2015, 20(5):589-599.
[2] 胡文超, 白虎志, 董安祥. 中国西部空中水汽分布结构特征[J]. 南京气象学院学报, 2005, 28(6):808-814.
Hu Wenchao, BaiHuzhi, Dong Anxiang. Distributive characters of water vapor in western China[J]. Journal of Nan Jing Institute of Meteorology, 2005, 28(6):808-814.
[3] 刘阳, 崔翔, 卢铁兵, 等. 湿度对绞线正极性电晕电流脉冲及其无线电干扰影响的实验[J]. 电工技术学报, 2015, 30(3):79-89.
Liu Yang, Cui Xiang, Lu Tiebing, et al.Experimental investigation of humidity impact on positive corona current pulse and its radio interference of stranded conductors[J]. Transactions of China Electrotechnical Society, 2015, 30(3):79-89.
[4] Abdelsalam M.Positive wire-to-plane coronas as influenced by atmospheric humidity[J]. IEEE Transactions on Industry Applications, 1985, 21(1):35-40.
[5] 王清亮, 张璐, 李舟, 等. 空气湿度对导线电晕起始电压的影响[J]. 电力建设, 2009, 30(8):38-41.
Wang Qingliang, Zhang Lu, Li Zhou, et al.Influence of humidity on conductor corona onset voltage[J]. Electric Power Construction, 2009, 30(8):38-41.
[6] 惠建峰, 关志成, 王黎明, 等. 正直流电晕特性随气压和湿度变化的研究[J]. 中国电机工程学报, 2007, 27(33):53-58.
HuiJianfeng, Guan Zhicheng, Wang Liming, et al. Research on variation of positive DC corona characteristics with air pressure and humidity[J]. Proceedings of the CSEE, 2007, 27(33):53-58.
[7] 卞星明, 惠建峰, 黄海鲲, 等. 气压湿度对负直流电晕特性影响的研究[J]. 中国电机工程学报, 2010, 30(4):118-124.
BianXingming, HuiJianfeng, Huang Haikun, et al. Effects of air pressure and humidity on the characteristics of negative DC corona[J]. Proceedings of the CSEE, 2010, 30(4):118-124.
[8] Hu Q, Shu L, Jiang X, et al.Effects of air pressure and humidity on the corona onset voltage of bundle conductors[J]. IET Generation, Transmission & Distribution, 2011, 5(6):621-629.
[9] 林锐. 直流正极性下导线电晕放电特性及影响因素的研究[D]. 重庆:重庆大学, 2009.
[10] 叶瑞, 张豪俊, 张冰冰, 等. 户外型智能控制柜凝露预防[J]. 电气技术, 2016, 17(8):110-113.
Ye Rui, Zhang Haojun, Zhang Bingbing, et al.Condensation prevention for outdoor intelligent control cabinet[J]. Electrical Engineering, 2016, 17(8):110-113.
[11] Rose JW.Dropwise condensation theory[J]. International Journal of Heat and Mass Transfer, 1981, 24(2):191-194.
[12] Abu-Orabi M.Modeling of heat transfer in dropwise condensation[J]. International Journal Heat and Mass Transfer, 1998, 41(1):81-87.
[13] Glicksman L, Hunt A.Numerical simulation of dropwise condensation[J]. International Journal of Heat and Mass Transfer, 1972, 15(11):2251-2269.
[14] Lefevre EJ, Rose JW.A theory of heat transfer by dropwise condensation[C]//Proceedings of the 3rdInternational Heat Transfer Conference, Chicago, USA, 1966:362-375.
[15] Rose JW.On the mechanism of dropwisecondensation[J]. International Journal of Heat and Mass Transfer, 1967, 10(6):755-756.
[16] Graham C, Griffith P.Drop size distributions and heat transfer in dropwise condensation[J]. International Journal of Heat and Mass Transfer, 1973, 16(2):337-346.
[17] 胡琴, 袁伟, 舒立春, 等. 电压类型对复合绝缘子覆冰及闪络特性的影响[J]. 电工技术学报, 2015, 30(3):268-276.
Hu Qin, Yuan Wei, ShuLichun, et al. Influence of voltage types on composite insulator icing and flashover characteristics[J]. Transactions of China Electrotechnical Society, 2015, 30(3):268-276.
[18] 蒋兴良, 孟志高, 张志劲, 等. OPGW临界融冰电流及其影响因素[J]. 电工技术学报, 2016, 31(9):174-180.
Jiang Xingliang, MengZhigao, Zhang Zhijin, et al. Critical ice-melting current of ice-covered OPGW and its impacting factors[J]. Transactions of China Electrotechnical Society, 2016, 31(9):174-180.
[19] 舒立春, 宫林, 蒋兴良, 等. 水滴或污秽对导线电晕放电起始特性的影响[J]. 高电压技术, 2008, 34(4):633-637.
ShuLichun, Gong Lin, Jiang Xingliang, et al. Corona inception discharge characteristics of conductor adhered with water drops or pollution[J]. High Voltage Engineering, 2008, 34(4):633-637.
[20] 施明恒, 甘永平, 马重芳. 沸腾和凝结[M]. 北京: 高等教育出版社, 1995.
[21] 谢和平. 分形应用中的数学基础与方法[M]. 北京: 科学出版社, 1997.
[22] 张济忠. 分形[M]. 北京: 清华大学出版社, 1966.
[23] El-Bahy M, Abouelsaad M, Abdel-Gawad N, et al.Onset voltage of negative corona on stranded conductors[J]. Journal of Physics D-Applied Physics, 2007, 40(10):3094-3101. |
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2018, Vol. 33 
