柔性高压直流输电系统换流阀塔交流电场仿真计算  

Simulation Calculation of AC Electric Field for Valve Tower of Flexible HVDC Transmission System

作　　者：齐磊[1] 李超[1] 王星星[1] 客金坤 甄永赞[1] 崔翔[3] 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206 [2]国网智能电网研究院中电普瑞电力工程有限公司,北京102200 [3]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《高电压技术》2014年第11期3537-3543,共7页High Voltage Engineering

基　　金：国家自然科学基金(51277065);国家高技术研究发展计划(863计划)(2013AA050105)~~

摘　　要：为提高柔性高压直流换流阀塔绝缘设计的可靠性,采用Solid Works软件建立了换流阀塔3维模型,并基于ANSYS软件对阀塔金具表面电场强度进行了仿真计算。基于电流场对阀塔内水路进行分析,将计算得到的水路表面电位作为静电场区域的第1类边界条件,进而对全场域进行求解,从而解决电流场和静电场的耦合问题。分别计算了有、无水路时的阀塔电场分布。结果表明,在进行阀塔交流耐压试验时,水路对阀塔电场分布的影响较大;与无水路模型相比,有水路时阀塔表面的最大电场强度以及其出现位置均发生了变化。因此在进行电场仿真计算时,需要考虑水路的影响。In order to improve the insulation design of flexible HVDC converter valve tower in its reliability, we established a 3D model of the valve tower in Solid Works, and calculated the electrical field on the tower fitting＇s surface using the model in ANSYS software. From the aspect of current field, we analyzed the cooling water circuit system in the valve tower. Using the obtained surface potential of the water circuit system as the Dirichlet boundary condition, we solved the coupling problem between current field and static electric field and calculated the whole domain. The electric fields of valve tower in the presence or absence of cooling water circuit systems were calculated. The results show that the water circuit system significantly affects the electric field distribution on the valve tower in AC voltage withstanding tests; compared with those in the absence of water circuit system, the value and position of maximum electric field of tower in the presence of the system change remarkably. Therefore, it is necessary to take the impact of cooling water circuit systems into account in electrical field simulations.

关 键 词：柔性高压直流输电系统 换流阀 有限元法 水路 金具 电场计算 

分 类 号：TM721.1[电气工程—电力系统及自动化]