光纤复合架空地线直流融冰绝缘化改造方法应用研究
|
摘要
在覆冰季节,输电线路重冰区段的光纤复合架空地线(optical fiber composite overhead ground wire,OPGW)易发生因覆冰后应力过载导致的光纤断裂事故。覆冰已严重影响重冰区段的OPGW光缆安全运行。针对既有线路,可采用对OPGW(地线)绝缘化改造后,通过直流融冰消除覆冰。以国网凉山公司110 kV雷坝二线N56至N80重冰区段OPGW(地线)为研究对象,在已有OPGW绝缘化改造直流融冰研究成果基础上,对包含OPGW(地线)直流融冰回路、绝缘段感应电压计算、接地方式、地线绝缘子选型在内的关键技术问题进行了研究。目前,采用所研究成果实施的N56至N80重冰区段OPGW绝缘化改造工程已完成。在2018年冬季至2019年春季,已对该线路绝缘改造区段OPGW开展直流融冰4次,融冰效果良好,线路运行正常。对该线路OPGW(地线)绝缘改造涉及到的关键技术说明可供后续OPGW绝缘化改造参考。
Optical fiber composite overhead ground wire(OPGW) located in heavy icing area of transmission line is likely to suffer fracture accident caused by stress overload when icing in winter. The icing has a strong impact on safe operation of OPGW in heavy icig area. The method of DC de-icing using insulation reconstruction is adopted to eliminate the ice covered on OPGW. Based on the existing research results, taking N56～N80 OPGW, which is in heavy icing area belonging to 110 kV Leiba II line of State Grid Liangshan Power Supply Company, as the research object, the relevant simulation and calculation, including DC de-icing circuit, induced voltage, grounding mode, selection of insulator and insulation reform method for different types of towers, are illustrated. Using the obtained conclusions, the insulation reconstruction project for N56～N80 OPGW of 110 kV Leiba II line has been completed. DC de-icing has been carried out four times from December of 2018 to January of 2019 which has a good de-icing effect, and the line is operating normally. The insulation reconstruction method of OPGW can provide a reference for the subsequent projects.
Optical fiber composite overhead ground wire(OPGW) located in heavy icing area of transmission line is likely to suffer fracture accident caused by stress overload when icing in winter. The icing has a strong impact on safe operation of OPGW in heavy icig area. The method of DC de-icing using insulation reconstruction is adopted to eliminate the ice covered on OPGW. Based on the existing research results, taking N56～N80 OPGW, which is in heavy icing area belonging to 110 kV Leiba II line of State Grid Liangshan Power Supply Company, as the research object, the relevant simulation and calculation, including DC de-icing circuit, induced voltage, grounding mode, selection of insulator and insulation reform method for different types of towers, are illustrated. Using the obtained conclusions, the insulation reconstruction project for N56～N80 OPGW of 110 kV Leiba II line has been completed. DC de-icing has been carried out four times from December of 2018 to January of 2019 which has a good de-icing effect, and the line is operating normally. The insulation reconstruction method of OPGW can provide a reference for the subsequent projects.
引文
[1] 陈秀娟,夏潮,朱海宇,等.光纤复合架空地线直流融冰绝缘化改造对地线绝缘子与并联放电间隙的电气要求[J].高电压技术,2017,43(8):2733-2738.
[2] 110 kV～750 kV架空输电线路设计规范:GB-50545-2010 [S],2010.
[3] 孟志高.光纤复合架空地线(OPGW)直流融冰过程与模型研究[D].重庆:重庆大学,2017.
[4] 陈绍辉,孙鹏.输电线路架空地线直流融冰方法[J].云南电力技术,2017,45 (5):32-36.
[5] 陈璨.架空线路OPGW融冰技术研究[J].南方能源建设,2016,3(2):82-87.
[6] 胡叶舟,余绍峰,张琳,等.输电线路架空地线融冰特性的研究[J].浙江电力,2015,34 (9):29-33.
[7] 李丹.并联间隙地线绝缘子覆冰闪络的仿真分析与实验研究[D].株州:湖南工业大学,2016.
[8] 张福泉.光纤复合架空地线OPGW的施工技术[J].电气技术,2013(7):76-78.
[2] 110 kV～750 kV架空输电线路设计规范:GB-50545-2010 [S],2010.
[3] 孟志高.光纤复合架空地线(OPGW)直流融冰过程与模型研究[D].重庆:重庆大学,2017.
[4] 陈绍辉,孙鹏.输电线路架空地线直流融冰方法[J].云南电力技术,2017,45 (5):32-36.
[5] 陈璨.架空线路OPGW融冰技术研究[J].南方能源建设,2016,3(2):82-87.
[6] 胡叶舟,余绍峰,张琳,等.输电线路架空地线融冰特性的研究[J].浙江电力,2015,34 (9):29-33.
[7] 李丹.并联间隙地线绝缘子覆冰闪络的仿真分析与实验研究[D].株州:湖南工业大学,2016.
[8] 张福泉.光纤复合架空地线OPGW的施工技术[J].电气技术,2013(7):76-78.