基于OTN技术的光路自动保护倒换可靠性分析

Reliability Performance Analysis of Optical Automatic Switch by OTN

电力通信网可靠性在智能电网安全运行中起着至关重要的作用。采用层次化建模思想建立了典型电力通信系统的可靠性模型。首先,采用自顶向下分解法,将典型配电网通信系统解构成终端层子系统、接入层子系统、子站通信层子系统和主站控制层子系统;然后,采用平均故障间隔时间、平均无故障运行时间、平均修复时间等参数评估通信基础产品的可靠度,采用非冗余系统、完全冗余系统,部分冗余系统,以及旁联系统评估各个子系统的可靠度;最后,采用自底向上合成法,根据系统的拓扑结构评估整个网络的可靠性。提出的可靠性分析方法为电力通信网可靠性评估方法提供了理论依据。

The reliability of power communication network plays an important role in the safe operation of smart grid. The reliability model of the typical electric power communication system is established by using the hierarchical modeling. First,the power communication system is decomposed into terminal layer,access layer,sub-station communication layer and master station control layer subsystem by means of top-down decomposition method. Then,the reliability of basic products is evaluated by using parameters such as mean time between failures,mean time without failures and mean time to repair,and the reliability of each subsystem is evaluated by using non-redundant system,fully redundant system,partially redundant system and collateral system. Finally,the bottom-up synthesis method is used to evaluate the reliability of the whole network according to the topology of the system. The reliability analysis method proposed provides a theoretical method for the reliability evaluation in power communication network.