摘要
为研究换流站抗干扰设计基础的电磁骚扰源特性,采用基于EMTP的宽频时域电路方法和矩量法的频域电磁场计算方法分析了换流阀导通和关断时产生的骚扰水平,试验研究了断路器操作引起的电磁骚扰特性。研究结果表明,传导骚扰可覆盖达数MHz的频率范围,辐射骚扰在数MHz附近问题最严重,该类电磁噪声是直流高压换流站中最重要的骚扰源;直流系统操作会在二次电缆中产生几百V的振荡衰减波,直流管母线起晕电压高,直流场电晕引起的无线电骚扰水平较低。
A method of time-domain wide-band circuit simulation based on Electromagnetic Transient Program （EMTP） was used to analyze the conducted electromagnetic disturbance （EMD） caused by valve operations （turn-on and turn-off）, the frequency band covers up to several MHz, while a method based on the Method of Moments （MOM） was adopted to calculate radiated EMD, which is much more significant at about several MHz. This is the most important EMD source during the steady state. Characteristics of the EMD caused by transient processes of switching operations were analyzed based on tests. It is shown that damping oscillatory waves are generated in secondary cables. The major frequency is about 0.4 MHz to 2 MHz and the amplitude is about several hundred volts. Because of the high corona inception voltage of DC tube buses, the radio frequency disturbance level caused by the corona phenomenon in DC yards is relatively low.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第5期898-902,共5页
High Voltage Engineering
基金
“十一五”国家科技支撑计划重大项目(2006BAA02A21)~~
关键词
换流站
电磁骚扰源
操作暂态过程
换流阀
传导干扰
辐射干扰
converter station
EMD source
transient process of switching operations
valve
conducted EMI
radiated EMI
