电网技术2011，Vol.35Issue(8)：192-196,5.
±500kV气体绝缘金属封闭输电线路绝缘尺寸设计
Design of Insulation Dimension for ±500 kV DC Gas Insulated Transmission Line
贾志杰 1甘德刚 1李晶1
作者信息
- 1. 四川电力科学研究院,四川省成都市610072
- 折叠
摘要
Abstract
Along with large-scale application of high-voltage power transmission and transtbnnation equipment such as gas insulated transmission line （GIL）, the dielectric strength of inner supporting insulators becomes important factor influencing secure and stable operation of the equipment. Two key influencing factors restricting the application of GIL in HVDC power transmission are charge accumulation along insulator surface and free conductive particles. Considering the two factors and by use of finite element analysis software, the insulation dimensions for ±500kV DC GIL, including insulation dimensions of inner and outer diameters of GIL, inner and outer shielding electrodes and shield pits as well as the structural design of alumina-filled epoxy resin disc-type insulator, are designed. Besides, three principles for the structural design of outer form of disc-type insulator for DC GIL are proposed and in the design the influences of surface charge accumulation and metal particles on insulation level of GIL are considered. Designed results achieve anticipated targets; the distribution of equipotential lines is uniform, however, the insulation performance of designed results is to be further verified by experiments. KEY WORDS： particle; surface charge accumulation; gas insulated transmission line （GIL）关键词
雷电冲击耐受电压/内屏敝电极/外屏蔽电极/自由导电微粒/表面电荷积聚/气体绝缘金属封闭输电线路Key words
lightning impulse withstand voltage/inner shield electrode/outer shield electrode/free conductive分类
信息技术与安全科学引用本文复制引用
贾志杰,甘德刚,李晶..±500kV气体绝缘金属封闭输电线路绝缘尺寸设计[J].电网技术,2011,35(8):192-196,5.
