摘要
为分析特高压换流站阀厅金具表面电场分布情况,采用静电场有限元数值方法进行了求解。首先以某±800kV特高压高端阀厅为研究基础,建立3D实体模型。然后根据阀厅设备的电气参数,通过PSCAD仿真得到阀厅设备在额定功率和轻载运行时的电位波形。最后采用静电场瞬时加载法,选取典型的数值进行加载求解,得到各种运行工况下阀厅内部金具设备场强分布云图和最大值分布规律,并对场强最大的金具进行优化设计。计算结果表明,在当前设计方案及配置条件下,阀厅内部高压侧设备连接及屏蔽金具表面场强较低,完全满足特高压直流阀厅内部电场控制要求;低压侧部分设备的屏蔽金具表面场强较高,接近甚至超过起晕场强,需要重点关注,并建议将D侧支柱绝缘子均压环管径增大至100mm。研究结果为特高压阀厅金具的设计规划提供了可靠支撑,具有重要的借鉴价值。
We calculated the surface electric field of electric power fittings in UHV valve hall using the electrostatic field finite element method. Firstly, we built a 3D model of ±800 kV UHV high-end valve hall. Then, we obtained the potential waveform of main equipment under rated power and light load power in the hall by PSCAD simulation by using parameters of the equipment. Finally, using instantaneous loading method of electrostatic field and typical data from the numerical solutions, we obtained the principles of the electric field distributing and the maximum electric field locating in the valve hall, and optimized the fittings where there were the maximum electric field values of the valve hall. The calculated results indicate that, the maximum surface electric field intensity of the connection and shielding fittings in Y-Y side is relatively low, meeting the control requirements of UHV valve hall electric field. However, the surface electric field intensity of the shielding fittings in Y-D side is relatively high, close to or even more than the corona onset value, thus it should be focused on, and the diameter of shielding ring for Y-D side post insulator is proposed to be 100 mm. The conclusions provide a reliable support for designing UHV valve hall, and they have important reference value.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2013年第12期2916-2923,共8页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2011CB209404)
特高压工程技术国家工程实验室开放基金(NEL201210)~~
关键词
特高压
换流站
电力金具
阀厅
电场强度
直流
UHV
converter station
electric power fitting
valve hall
electric field
DC
