随着PTN技术在电力通信网中的应用，其传输继电保护业务的可行性需要深入研究。通过分析PTN的两种主流技术PBT(Provider Backbone Transport)和T-MPLS(Transport MPLS)的特点，从通道备用方式、时延、TDM仿真以及交换等多个方面论述了其传输继电保护业务的可行性。首先从接口速率、时延、误码、通道四个方面分析继电保护业务对性能指标的要求。结合相关时延公式，重点研究传输继电保护业务的发送/接收时延和转发交换时延，在技术选择、路由配置等方面给出了建议。从可靠性的角度研究线性保护倒换方式的选择，并给出了建议方案。%With the application of PTN in telecommunication networks, the feasibilities need to be studied much deeper about PTN transmitting relay protection services. In this paper, the characters of provider backbone transport (PBT) and transport MPLS (T-MPLS) which are the two key technologies of PTN are analyzed. By the analysis, the feasibilities about PTN transmitting relay protection services are discussed in the aspects of the standby LSP, time delay, TDM simulations, exchanging and so on. Firstly, the performance indexes of relay protection services are analyzed in four aspects—— interface rate, time delay, bit error and channel. Secondly, based on the time delay formulas, the study is focused on the sending/receiving delay and the forwarding and switching delay about PTN transmitting relay protection services. Some recommendations such as technology choice and routing configuration are given. Finally, how to choose linear protection switch is studied from the reliability standpoint. Related suggestion and scheme are given.
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