火力发电厂电磁干扰及其抑制方法

Electromagnetic interference and its curbing methods in steam power plant

对电磁干扰引入电子设备的途径、干扰产生的原理、对现场设备的影响做简单介绍,并结合电厂生产现场中电磁干扰的实例,对屏蔽、接地、隔离等破坏干扰传播途径的方法及尽量降低电子设备对干扰的敏感性的手段进行探讨。希望能引起现场技术人员对电磁干扰问题更深层次的讨论,以便根据干扰因素的起源,分别对硬件、软件进行改进,选择有针对性的抗干扰措施。

The electromagnetic environment of the production site in power plant is very complicated, all kinds of electromagnetic interference that cause great damage to the measure equipments and control devices have posed greatly threat to the stability and safe operation of the site equipments. This paper introduces the channel through which the electromagnetic interference damages the electronic equipments, and its principle and affect on the site equipments. By using the living examples of site production in power plant, the paper tries to probe into the methods, such as shielding, earthing, isolation to against the channel of electromagnetic interference, and means to reduce the sensitivity of the electronic equipments to the electromagnetic interference to the minimum extent. According to the origin of the electromagnetic interfe- rence factors, to revise the hardware, software, and choose correct measures to handle the problems are presented.