覆冰交流输电线路保线电流及其影响因素分析Analysis on Anti-Icing Current and Its Impacting Factors for Ice-Coated AC Transmission Lines
蒋兴良;林锐;张志劲;胡琴;孙才新;
摘要(Abstract):
建立了导线覆冰过程的热平衡方程,同时考虑绞线几何外形及集肤效应对传热过程的影响,提出了基于焦耳热效应的输电线路导线保线电流计算公式,并采用Runge-Kutta算法对水滴运动轨迹进行模拟,得到碰撞系数这一关键参量值。仿真结果表明,保线电流是导线外径、导线电阻、表面几何外形等导线自身参数以及环境温度、风速、水滴中值体积直径、空气中液态水含量等大气参数的函数;得到了不同绞线在典型覆冰类型下的保线电流,与人工气候室的试验结果相吻合。将该模型的预测结果与其他模型进行了比较,进一步证明该模型的准确性。
关键词(KeyWords): 大气参数;覆冰;保线电流;运动轨迹;交流线路
基金项目(Foundation): 国家重点基础研究发展计划项目(973项目(2009CB724501);; 重庆市科委自然科学基金计划资助项目(2008BB6157)~~
作者(Author): 蒋兴良;林锐;张志劲;胡琴;孙才新;
Email:
DOI:
参考文献(References):
- [1]蒋兴良,易辉.输电线路覆冰及其防护[M].北京:中国电力出版社,2002:2-9.
- [2]李庆峰,范峥,吴穹,等.全国输电线路覆冰情况调研及事故分析[J].电网技术,2008,32(9):33-36.Li Qingfeng,Fan Zheng,Wu Qiong,et al.Investigation of ice-covered transmission lines and analysis on transmission line failures caused by ice-coating in China[J].Power System Technology,2008,32(9):33-36(in Chinese).
- [3]黄新波,刘家兵,蔡伟,等.电力架空线路覆冰雪的国内外研究现状[J].电网技术,2008,32(4):23-28.Huang Xinbo,Liu Jiabin,Cai Wei,et al.Present research situation of icing and snowing of overhead transmission linesin China and foreign countries[J].Power System Technology,2008,32(4):23-28(in Chinese).
- [4]李再华,白晓明,周子冠,等.电网覆冰防治方法和研究进展[J].电网技术,2008,32(4):7-13.Li Zaihua,Bai Xiaomin,Zhou Ziguan,et al.Prevention and treatment methods of ice coating in power networks and its recent study[J].Power System Technology,2008,32(4):7-13(in Chinese).
- [5]李成榕,吕玉珍,崔翔,等.冰雪灾害条件下我国电网安全运行面临的问题[J].电网技术,2008,32(4):14-22.Li Chengrong,LüYuzhen,Cui Xiang,et al.Research issues for safe operation of power grid in China under ice-snow disasters[J].Power System Technology,2008,32(4):14-22(in Chinese).
- [6]常浩,石岩,殷威扬,等.交直流线路融冰技术研究[J].电网技术,2008,32(5):1-6.Chang Hao,Shi Yan,Yin Weiyang,et al.Ice-melting technologies for HVAC and HVDC transmission line[J].Power System Technology,2008,32(5):1-6(in Chinese).
- [7]邓健,肖顺良,姚璞,等.220kV线路融冰方案的改进[J].电网技术,2008,32(5):29-30.Deng Jian,Xiao Shunliang,Yao Pu,et al.Improvement on ice-melting scheme for220kV transmission Line[J].Power System Technology,2008,32(5):29-30(in Chinese).
- [8]陈及时.掌握导线覆冰临界电流做好预防措施[J].中国电力,1997,30(10):50-53.Chen Jishi.Measures preventing conductors from ice coating under critical current[J].Electric Power,1997,30(10):50-53(in Chinese).
- [9]Personne P,Gayet H F.Ice accretion on wires and anti-icing induced by Joule Effect[J].Journal of Applied Meteorology,1998,27(2):104-114.
- [10]刘和云,周迪.防止导线覆冰临界电流的传热研究[J].中国电力,2001,34(3):12-16.Liu Heyun,Zhou Di.Heat transfer investigation on critical current to prevent wires from icing[J].China Electric Power,2001,34(3):12-16(in Chinese).
- [11]Peter Z.Modeling and simulation of the ice melting process on a current-carrying conductor[D].Canada:Quebec University,2006.
- [12]孙才新,蒋兴良.导线覆冰及其干湿增长临界条件分析[J].中国电机工程学报,2003,23(3):141-145.Sun Caixin,Jiang Xingliang.Analysis of critical icing conditions of conductor and wet-dry growth[J].Proceedings of the CSEE,2003,23(3):141-145(in Chinese).
- [13]Maurice H,Christian L.Models for glaze ice accretion and de-icing of current-carrying electrical conductors[J].IEEE Trans on Power Delivery,2005,20(2):1611-1616.
- [14]蒋兴良,张丽华.导线覆冰碰冻率及最大覆冰直径分析[J].中国电机工程学报,1999,19(9):10-13.Jiang Xingliang,Zhang Lihua.Collision and freezing efficiency of droplets with conductor and the possible maximum diameter of the iced conductor[J].Proceedings of the CSEE,1999,19(9):10-13(in Chinese).
- [15]Morgan V T.Thermal behavior of electrical conductors[M].England:Research Studies Press,1991:677-679.
- [16]Lowe P R.An approximating polynomial for the computation of saturation vapor pressure[J].Journal of Applied Meteorology,1977,(16):100-103.
- [17]Myers T G,Charpin P F.A mathematical model for atmospheric ice accretion and water flow on a cold surface[J].International Journal of Heat and Mass Transfer,2004,(47):5483-5500.
- [18]Farzaneh M,Kiernicki J.Flashover problems caused by ice build-up on insulators[J].IEEE Electrical Insulation Magazine,1995,11(2):5-17.