| In order to solve the problem of long distance transmission, our country vigorously promotes the construction of UHVDC transmission. In recent years, China has completed the construction of many± 800 k V HVDC transmission lines, a few of which have been put into operation. The electric power fittings used in these projects are all imported products. Since China has not grasped the technology of the valve hall electric power fittings manufacturing, prices of its imported equipment are monopolized and China's construction power transmission is restricted by foreign companies, which are very unfavorable to the development of China's power industry. The calculation for UHV valve hall fittings surface electric field distribution will play an important role in guiding the design of UHVDC transmission project.This article is focused on the ± 800 kV UHVDC converter station valve hall. It describes the method of using the technology of joint simulation of ANSYS and Solidworks to calculate the surface electric field distribution inside the valve hall fittings and hardware optimization. The specific work of this paper is divided into the following:(1)Analyze the internal structure of the high voltage valve hall and the connection of the electric power fittings. Build a three-dimensional model of the whole valve hall.(2)Summarize several methods to mesh finite element model, propose methods to solve the problems that large complex three-dimensional model can not be meshed by using regional subdivision.(3)Calculate the surface potential of the typical fittings in the valve hall by using PSCAD software, Based on three-dimensional model, calculate the electric field distribution valve hall full results of four typical times.(4)Find out the worst position of the electric field distribution in the valve hall, and optimize the fittings in this position. In this way, control the electric field strength of the whole valve hall at a reasonable level. |
PDF Full Text Request