V5数字接口在变电站通信接入网中的应用

Application of V5 digital interface in substation access network

V5接口是接入网系统和本地交换机之间的数字接口。最近几年,电力通信变电站接入网已组建好光纤通信网络,改变了过去电力线载波话音容量少、频带窄等缺点,但交换网和PCM接入网之间基本还是以模拟Z接口相连,模拟转接带来局端工作量大、PCM设备多、可靠性低、维护不方便等。文章介绍了V5接口的历史、技术特点、基本功能等,结合电力接入网现状,提出以V5数字接口连接本地交换机和变电站接入网,解决了上述问题,增强了变电站接入网安全性和可靠性。

V5 digital interface is an interface connecting the access network to local switch. In recent years, the communication access network of substation has been upgraded into the optical communication network, thus overcoming the disadvantages of small voice capacity and narrow frequency bandwidth that power line carrier has. But the switching network and PCM access network are connected by the analog signal line interface, which needs A/D conversion bringing heavy work load, more PCM equipments, low reliability and inconvenient maintenance, etc. This paper introduces the history, the technical characteristics and the basic function of V5 digital interface. Based on the power access network situation,the paper puts forward connecting the access network with the switching network by V5 digital interface, avoiding the above problems and enhancing the safety and reliability of substation communication access network.