电网技术Issue(6)：1625-1631,7.
750 kV输电线路复合横担均压特性
Voltage-Sharing Characteristics of Composite Cross-Arm in 750 kV AC Transmission Lines
摘要
Abstract
It is the first time in China to apply composite cross-arms in 750kV AC transmission system, and in view of its high voltage grade and complex structure the uneven distribution of potential and electric field in 750 kV AC transmission system have to be researched in depth. Utilizing three-dimensional finite element analysis software ANSYS and considering influences of such factors as tower, earth, wires and inter-phase interaction, the distributions of potential and electric field under different design schemes are researched, and the influences of spacer flange and grading ring and sharing ring, which are configured at the terminals of the cross-arm, on potential distribution on composite cross-arm, meanwhile the potential distribution on insulator string for 750kV suspension tower and the potential distribution on composite cross-arm are contrasted. Based on the first design scheme of the cross-arm, a final scheme for the composite cross-arm is chosen, in which the suspension insulator string is canceled, the length of composite cross-arm is prolonged and the grading and shielding devices are configured reasonably, thus the potential distribution of the composite cross-arm is better than that of suspension tower. Verification results of electrical tests performed by China EPRI show that the composite cross-arm adopting the finally chosen scheme possesses good electrical performances that can meet operational requirements.关键词
复合横担/均压特性/750 kV输电线路/有限元/电位分布/均压环/电气试验Key words
composite cross-arm/voltage-sharing characteristics/750 kV transmission line/finite element method (FEM)/voltage distribution/grading ring/electric testing分类
信息技术与安全科学引用本文复制引用
杨熙,喻新强,尚勇,朱岸明,杜进桥,施荣,范传杰,龚兴国,彭宗仁..750 kV输电线路复合横担均压特性[J].电网技术,2013,(6):1625-1631,7.基金项目
国家电网公司基建项目。Project Supported by Capital Construction Project of SGCC （）
