摘要
摘绝缘子覆冰严重威胁着电力系统的安全运行,是造成跳闸闪络的主要原因之一,在绝缘子表面部分涂覆半导电涂层是一种新的电热防冰方法。为了进一步量化计算涂层位置对防冰效果的影响,在此方法的基础上,建立了热力学模型,对半导体涂层在大盘径绝缘子(以空气动力型绝缘子为例)表面的配置方式进行了研究。考虑导通概率的影响,对模型进行修正。根据人工气候室中的试验结果,当“空白带”留在绝缘子边沿,并且带宽为5-7cm时效果较好。试验结果基本与计算吻合,表明修正模型能够反映和指导绝缘子表面半导体涂层的配置方式,为实际线路的应用提供了一种探索思路。
Insulator icing is one of the main reasons for flashover, which seriously threatens the power system security. Semi-conductive room temperature vulcanized (RTV) coatings are partially applied to insulators as a new electro-thermal method for insulator anti-icing. On this basis, an equivalent model was founded on the big shed insulator (aerodynamic insulator) for instance, to discuss the design for the coating. And the conduction probability was considered to revise the model. According to the experimental results, this method worked better when the uncoated-band was next to the edge of the insulator with the width of 5-7cm. The result of calculation agrees with the experimental data, proving that the revised method can be applied to the design of the semi-conductive RTV coating on the insulator, which, also serves as guidance for utilization in the outdoor power system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第7期132-138,201,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(51077081
51177081)
"十一五"国家科技支撑计划重大项目(2009BAA23B04)
Project Supported by National Natural Science Foundation of China(51077081
51177081)
Key Project of the National Eleventh-Five Year Research Program of China(2009BAA23B04)
关键词
绝缘子防冰
等效模型
导通概率
半导电涂层
涂层配置
insulator anti-icing
equivalent model
conduction probability
semi-conductive coating
design forcoating
作者简介
孙振庭(1985),男,硕士研究生,研究方向为输电线路绝缘子覆冰及防治措施研究,sztlgi@163.com
贾志东(1966),男,博士,教授,博士生导师,长期从事高电压外绝缘及电工新技术等方面的研究,jiazd@sz.tsinghua.edu.cn
韦晓星(1985),男,博士研究生,研究方向为外绝缘防污闪和防覆冰问题,weixx10@grnail.com
关志成(1944),男,博士,教授,博士生导师,长期从事电力统外绝缘、特高压输电、电磁环境等方面的研究,guanzc@sz.tsinghua.edu.cn。