电网技术Issue(9)：2562-2569,8.DOI:10.13335/j.1000-3673.pst.2014.09.039
1000 kV特高压交流变电站铝管母线末端屏蔽方式研究
Study on Terminal Shielding Way of Aluminum Tubular Bus in 1 000 kV UHV AC Substations
李禾 1王闯 1刘鹏 1彭宗仁1
作者信息
- 1. 电力设备电气绝缘国家重点实验室 西安交通大学，陕西省 西安市 710049
- 折叠
摘要
Abstract
As a result of its good current-carrying performance and reliable mechanical connection property the tubular bus is widely used in HV substations. In UHVAC substations the terminal shielding of the tubular bus becomes more and more serious, so the research on the shielding structure for tubular bus terminal is of significance to the design of UHVAC substations. In allusion to the corona appeared at the terminal of aluminium tubular bus connected to the top end of the HV shunt reactor during the trial operation of 1 000 kV UHVAC Changzhi substation, a tri-dimensional simulation model is built by finite element method and both distributions of potential and electric field at the terminal of the aluminium tubular bus are simulated and the reasons causing the corona discharge are found; on this basis the effects and feasibilities of several kinds of shielding ways are researched, and then a reasonable way, which is composed of two parts:one is a semi-spherical sealing cover plate with a diameter of 250mm connected to the tubular bus terminal and the another is a grading ring with diameter of 300mm added above the tubular bus, is proposed. Using the proposed shielding way, the distribution of electric fired at the tubular bus terminal is obviously improved and the maximum electric field intensity near the top end of HV shunt reactor connected to the tubular bus terminal is reduced to 1390V/mm, so this maximum electric field intensity is reduced by 44.4% than that of the original structure, thus the demand of locally controlling the field intensity is met and the corona discharge at the terminal of tubular bus is effectively suppressed. The proposed shielding way is successfully applied in UHVAC Changzhi substation.关键词
特高压交流变电站/铝管母线/电晕/有限元/电场强度/屏蔽方式Key words
UHVAC substations/aluminum tubular bus/corona/finite element/electric field intensity/shielding way分类
信息技术与安全科学引用本文复制引用
李禾,王闯,刘鹏,彭宗仁..1000 kV特高压交流变电站铝管母线末端屏蔽方式研究[J].电网技术,2014,(9):2562-2569,8.
