分析了±800 kV云广特高压直流工程楚雄和穗乐换流站电磁干扰的产生机理，并结合各自的布置情况，对2站的电磁干扰进行了定量分析，得出了2站阀厅及控制楼电磁屏蔽的需求，进而提出2站阀厅及控制楼应采取的屏蔽措施。

In Chuxiong and Suidong converter station of ±800 kV UHVDC transmission lines from Yunnan to Guangdong, electromagnetic disturbance occurs. The principles of fundamental electromagnetic disturbance are analyzed. According to station layouts, the electromagnetic disturbances are investigated quantitatively, the shielding requirements for valve halls and control buildings are proposed, and the corresponding shielding measurements are presented.