直流换流站阀厅内三维电场的分布式并行计算

Distributed Parallel Computation of the 3D Electric Field in the HVDC Converter Valve Hall

直流换流站阀厅的三维电场计算对金具结构设计与厅内场强控制具有重要的指导作用。然而,由于阀厅内部设备多、结构复杂,其几何建模与数值仿真较为困难。为此基于ANSYS分布式并行计算平台,通过对ANSYS模型实体进行自动化相对编号,提出了模块化与独立化的建模方法,并使ANSYS模型的APDL(ANSYS参数化设计语言)代码具有重用性。基于该方法建立了直流换流站阀厅内部交流侧设备的模型。通过选择适合分布式并行计算的ANSYS求解器,计算出阀厅内部的三维电场分布。计算结果表明,在当前设计方案下,阀厅内部金具表面最大场强为27.51 kV/cm,以球-板电极起晕场强作为判据,阀厅内无起晕现象。该数据为换流站阀厅的设计规划提供了可靠支撑,具有重要的指导意义。

On the basis of the ANSYS distributed parallel computation platform,we proposed a new modular and orthogonal modeling method by applying automatic relative numbering to the ANSYS geometric entities.Furthermore,the ANSYS APDL（ANSYS Parametric Design Language） code of the model could be reused.With this new method,the full-dimensional model for equipment inside the HVDC converter valve hall was established.By selecting the appropriate ANSYS solver for the distributed parallel computation,the 3D electric field distribution in the valve hall was calculated for the first time.The results show that under the current design,the maximum electric field on the fitting surface is 27.51 kV/cm.By adopting the corona onset field strength of the sphere-plate electrodes as criterion,it is indicated that there is no corona effect in the valve hall.These data are significant and helpful for the design of the converter valve hall.