作　　者： ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《电力系统通信》 2005年第4期23-26,共4页

摘　　要： 电力设备和以计算机为中心的监测系统之间的隔离和抗干扰,是维护二者均能可靠工作的保证。由于光隔离技术的频带宽、电磁干扰小,文章介绍了其在电力载波机实时监控系统中的一些应用,主要包括电压类信号、开关信号和中频信号的变送。文中设计的变送器是一个光耦合差动放大器,它除了具有低漂移和高共模抑制比等优点外,输入与输出之间还是电隔离的。经过近两年的实际运行证明,这种光隔离监控系统性能良好。 Isolation and anti-interference are necessary to power communication equipment and real-time monitoring system. Compared to magnetic isolation, optical isolation has wider frequency range and lower EMI. This paper presents the applications of optical isolation in the real-time monitoring of power carrier equipment including transmission of voltage, switching and middle frequency signals. The key of transmission circuit is an optical isolated differential amplifier. It has the advantages of lower drift, higher CMRR and electrical isolated between input and output signals. Its performance is very well in practice.

关 键 词： 光隔离 信号 实时监控 差动放大器

领　　域： [电子电信] [电子电信]