中文摘要：

为了研究特高压直流传输线下的电磁环境,研制了1种无线电场测量系统。为了检测电场测量仪的电磁兼容性能,在30台样机上进行了试验。分析了电场测量仪电磁兼容性能检测的测试结果,并结合电场测量仪的工作环境和干扰途径对电场测量仪电磁兼容中易受干扰的环节进行了相应的改进。研究结果表明：电磁兼容试验项目中故障率最高的为射频电磁场辐射抗扰度试验和浪涌抗扰度试验,通过增加设备内部铜片的厚度,在设备电源端口增加瞬态抑制二极管和滤波器,可有效抑制电磁辐射和浪涌骚扰所产生的电磁干扰。

英文摘要：

To research the electromagnetic environment of ultra high-voltage direct-current（HVDC） transmission lines, we developed a wireless electric field measuring instrument. Moreover, we selected 30 prototypes to test the electromagnetic compatibility（EMC） performance of electric measuring instrument, and analyzed the test results of electric measuring instrument＇s EMC performance in detail. Combining electromagnetic working environment with interference routes of the electric measuring instrument, some important factors which were susceptible to electromagnetic interference（EMI） in testing and the corresponding improvement measures were proposed. Test results show that the most obvious faults occur in the radiated, radio-frequency, electromagnetic field immunity test and surge immunity test. But the faults of electromagnetic radiation and surge harassment can be conquered by increasing the thickness of the sheet copper inside the equipment and adding transient suppression diodes and filter at the device power supply port.