摘要
电晕影响是高压直流输电的重要影响因素。由于电晕电流是导线周围带电粒子的杂散性运动引起的,具有线路工作电压高、频谱宽、变化剧烈等特点,测量较为困难。针对HVDC试验线路的特点,利用取样电阻法设计了电晕电流测量系统,实现HVDC试验线段电晕电流的地面安全可靠测量。介绍了测量原理及系统组成,解决了高压绝缘、信号干扰和电晕信号高频采样记录的测量困难。在实验室搭建模拟线路进行了试验,通过对试验数据进行分析,测量结果与现有经验公式的结论相符,验证了方案的可行性。
Corona effect is an important factor that influencing HVDC transmission. It is caused by the spurious movement of charged particles around the conductors,and has the characteristics of high voltage,wide spectrum,strenuous diversification,so it is difficult to measure. According to the characteristics of HVDC test line,a corona current measurment system is developed for the investigation of HVDC test line. The measurement principle and system configuration is described. Problems such as high-voltage insulation,high-frequency signal sampling,interference suppression,and signal record and transmission etc. are solved. Simulation experiments are also carried out in laboratory. By analyzing the test results,the feasibility of the developed measurement system is validated.
出处
《电气技术》
2010年第3期26-28,46,共4页
Electrical Engineering
关键词
电晕
电流
取样电阻
corona
current
sampling resistance
