±500 kV柔直换流站阀厅金具表面电场计算

Calculation of the Surface Electric Field on the Valve Hall Hardware of ±500 kV Flexible and Direct Converter Station

为研究柔直传输系统阀厅金具电场分布情况,以张北±500 kV柔直电网工程丰宁换流站金具及配套设备为研究对象,构建了其三维模型。用直流偏置+正弦波模拟其运行电压情况,实现了阀厅整体电位和电场分布的高效计算,得到了各金具表面最大场强及分布位置,并将其最大场强控制在了 2 kV/mm以内。该研究结果为±500 kV柔直换流站阀厅的规划设计提供了参考,对阀厅内部金具的抗晕结构优化具有一定的参考价值。

In order to study the electric field distribution on the valve hall hardware of the flexible and direct transmission system,a three-dimensional model is established for the hardwares and supporting equipment in Fengning converter station of Zhangbei ±500 kV flexible and direct power grid project.The operating voltage is simulated with direct current offset and sine wave,the overall potential and electric field distribution of the valve hall are calculated efficiently,and the maximum field strength and distribution of each hardware surface are obtained,and the maximum field strength is controlled within 2 kV/mm.The research results provide a reference for the planning and design of the valve hall of ±500 kV flexible and direct converter station,and have a certain reference value for the anti corona structure optimization of the internal hardware of the valve hall.