提高数字接口设备抗干扰性能的措施

继电保护要求数字接口设备在有故障、受干扰时数据传输不出现任何误码。针对可能存在的电磁干扰采取了有效的抗干扰措施。改进了机箱结构,提高机箱的屏蔽性能;使用了屏蔽性能更好的通信电缆;改进了通信电缆的接地方式;给通信电缆加套磁环;改变电缆和机箱之间的接口方式,在接口处安装滤波器,减小通信电缆上耦合的干扰对数字接口设备造成的影响。结果表明,在国家标准所规定的最高等级的电磁干扰下,继电保护装置中用于监视通道状态的相应计数器没有变化,数字接口设备工作正常。

Measures to improve anti-jamming performance of digital interface devices

Aiming at the existing deficiency in current application software for protection setting and analysis,an intelligent and interactive system of fault analysis,protection setting and simulation is established,which takes database as its core,applies the advanced technologies of visual programming,OOP,computer graph processing and modularization,combines the protection setting with fault analysis,and incorporates graphics,data and simulation together to implement the integrated design of protection setting and intelligent simulation for local power network.It enhances the creditability of protection settings and ensures protection devices the selectivity,speediness,reliability and security.