A novel scheme for high-reliability optical process level network (OPLN) with all-optical passive edge nodes in smart substation is first proposed, supporting both sampled value and generic object oriented substation event services with multicast traffic pattern. The edge node consists of n passive optical distribution modules and one arrayed waveguide grating, realizing the all-optical interconnection inside bays to reduce the optical-electrical and electrical-optical processes. A software defined network based center switch schedules all intelligent electrical devices in the network using multi-point control protocol. The analytical model for the OPLN reliability is established based on fault tree analysis. The results show that the OPLN can achieve almost two-fold mean-time-between-failure as compared to the Ethernet switch based network. Moreover, 99.99% availability can be obtained when network scale is up to 24 bays under dual-network redundancy.

首先提出了一种智能变电站中具有全光无源边缘节点的高可靠性光学过程级网络（OPLN）的新方案，该方案同时支持采样值和具有多播流量模式的通用面向对象变电站事件服务。边缘节点由n个无源光分布模块和一个阵列波导光栅组成，实现了机架内部的全光互连，从而减少了光电和电光过程。基于软件的基于网络的中心交换机使用多点控制协议调度网络中的所有智能电气设备。基于故障树分析，建立了OPLN可靠性分析模型。结果表明，与基于以太网交换机的网络相比，OPLN可以实现几乎两倍的平均故障间隔时间。