针对2008年我国南部地区大范围冰灾对电网正常供电的影响，研究了通过调整运行方式达到输电线路融冰的可行性。通过调整湖南、江西电网的运行方式，对其电厂出线、主要输电断面和负荷中心线路进行过电流融冰可行性分析，结果表明，接入220 kV电压等级的电厂出线部分实施过电流融冰可行，负荷中心环网不具备过电流融冰的可行性，负荷馈线和省内主要断面实施过电流融冰的可行性很小。文中还探讨了短路电流融冰方案的适用范围。

According to the impact of wide-range icing disaster in southern area of China on normal power supply, the feasibility of ice-melting of transmission lines by adjusting operation mode is researched. By means of adjusting operation modes of Hunan and Jiangxi provincial power grids, the feasibility of overcurrent ice-melting for power plant outlets, main tie-lines and transmission lines in load centers are analyzed. Analysis results show that it is possible for power plant outlets connected to 220 kV power network possess the feasibility of ice-melting by overcurrent, however, the ring-network located in load centers does not possess such a feasibility. There is very little feasibility for feeders and main tie-lines within provincial networks to adopting overcurrent ice-melting method. In this paper, the application scope of ice-melting of tranmission lines by short-circuit current is discussed.

[1] 张文亮，于永清，宿志一，等．湖南电网2008年冰雪灾害调研分析[J]．电网技术，2008，32(8)：1-5． Zhang Wenliang，Yu Yongqing，Su Zhiyi，et al．Investigation and analysis of icing and snowing disaster happened in Hunan power grid in 2008[J]．Power System Technology，2008，32(8)：1-5(in Chinese)． [2] 李再华，白晓民，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)． [3] 蒋兴良，易辉．输电线路覆冰及防护[M]．北京：中国电力出版社，2002：154-186． [4] Maurice H，Christian L，Josee C．Combined models for glaze ice accretion and de-icing of current-carrying electrical conductors [J]．IEEE Trans on Power Delivery，2005，20(2)：1611-1616． [5] 许树楷，赵杰．电网冰灾案例及抗冰融冰技术综述[J]．南方电网技术，2008，2(2)：1-6． Xu Shukai，Zhao Jie．Review of ice storm cases impacted seriously on power systems and de-icing technology[J]．Southern Power System Technology，2008，2(2)：1-6(in Chinese)． [6] 苑吉河，蒋兴良，易辉，等．输电线路导线覆冰的国内外研究现状[J]．高电压技术，2004，30(1)：6-9． Yuan Jihe，Jiang Xingliang，Yi Hui，et al．The present study on conductor icing of transmission lines[J]．High Voltage Engineering，2004，30(1)：6-9(in Chinese)． [7] 王永勤，蔡成良，康健，等．输电线路融冰特性和温升特性试验研究[J]．湖北电力，2005，29(增刊)：17-19． Wang Yongqin，Cai Chengliang，Kang Jian，et al．Experimental study on de-icing and temperature rising performance of transmission line [J]．Hubei Electric Power，2005，29(Z2)：17-19(in Chinese)． [8] 孙才新，蒋兴良，熊启新，等．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，Xiong Qixin，et al．Analysis of critical icing condition of conductor and wet-dry growth[J]．Proceedings of the CSEE，2003，23(3)：141-145(in Chinese)． [9] 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)：51-53． Chen Jishi．Measures preventing conductors from ice coating under critical current[J]．Electric Power，1997，30(10)：51-53(in Chinese)． [10] 刘煜，孙新良，刘基勋．一种覆冰污秽绝缘子闪络电压的理论计算模型[J]．电网技术，2005，29(14)：73-76． Liu Yu，Sun Xinliang，Liu Jixun．A theoretical calculation model for flashover voltage of ice-coated and polluted insulators[J]．Power System Technology，2005，29(14)：73-76(in Chinese)． [11] Rene C，Andre B，Jacques B．On-load network de-icer specification for a large transimission network[J]．IEEE Trans on Power Delivery，2007，22(3)：1947-1955． [12] 邓健，肖顺良，姚璞，等．220 kV线路融冰方案的改进[J]．电网技术，2008，32(4)：29-30． Deng Jian，Xiao Shunliang，Yao Pu，et al．Improvement on　ice-melting scheme for 220 kV transmission line[J]．Power System Technology，2008，32(4)：29-30(in Chinese)． [13] Maurice H．Christian L，Robert S A，et al．A dynamic programming methodology to develop de-icing strategies during ice storms by channeling load currents in transmission network[J]．IEEE Trans on Power Delivery，2005，20(2)：1604-1610． [14] 刘和云，周迪，付俊萍，等．防止导线覆冰临界电流的传热研究[J]．中国电力，2001，34(3)：42-44． Liu Heyun，Zhou Di，Fu Junping，et al．Heat transfer investigation on critical current to prevent wires from icing[J]．Electric Power，2001，34(3)：42-44(in Chinese)． [15] 邓万婷，康健，蔡成良，等．500 kV线路直流融冰方案研究[J]．湖北电力，2005，29(12)：14-16． Deng Wangting，Kang Jian，Cai Chengliang，et al．Study on 500 kV transmission line direct current de-icing scheme[J]．Hubei Electric Power，2005，29(12)：14-16(in Chinese)． [16] 许树楷，杨煜，傅闯．南方电网直流融冰方案仿真研究[J]．南方电网技术，2008，2(2)：31-36． Xu Shukai，Yang Yu，Fu Chuang．Simulation study of DC de-icing scheme for China southern power grid[J]．Southern Power System Technology，2008，2(2)：31-36(in Chinese)． [17] 李鹏，范建斌，李武峰．高压直流输电线路的覆冰闪络特性[J]．电网技术，2006，30(17)：74-78． Li Peng，Fan Jianbin，Li Wufeng．Icing flashover performance of HVDC transmission lines[J]．Power System Technology，2006，30(17)：74-78(in Chinese)． [18] 蔡成良，康健，忻俊慧，等．500 kV输电线路融冰技术研究[J]．湖北电力，2005，29(增刊)：2-7． Cai Chengliang，Kang Jian，Xin Junhui，et al．Study on 500kV transmission line de-icing technique[J]．Hubei Electric Power， 2005，29(Z2)：2-7(in Chinese)． [19] 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)． [20] 湖南省电力公司．湖南电网防冻融冰规程[R]．长沙：湖南省电力公司，2007．