基于SDH光网络的分层区域式保护通信系统的可靠性研究

摘要

In order to meet the wide-area protection communication requirements of power system, and provide reference and theoretical basis for the engineering design of power system wide-area protection network and the assessment calculation of communication systems, according to SDH optical network communication theory and self-healing network reliability evaluation method, transmission link section failure probability and availability and other indicators are quantitatively analyzed using state space method. A reliability research method of layered regional protective communication backbone and regional networks is described, including the reliability model and availability assessment of SDH self-healing network and star networks, network redundancy and process layer device network structure. Illustration analysis shows that the path protection feature using SDH self-healing ring network can reduce the impact of fiber failure on the entire ring network reliability, and improving the reliability of the interface is the key of reliability of the SDH ring network.%为了满足电力系统广域保护的通信要求，并为电力系统广域保护网络的工程设计及通信系统的评估计算提供参考和理论依据，提出了基于SDH光网络的分层区域式保护通信系统的可靠性研究。根据SDH光网络通信原理和自愈环网的可靠性评价方法，运用状态空间法量化分析了传输链路区段的故障概率和可用度等指标，阐述了分层区域式保护通信主干网和区域网的可靠性研究方法，包括SDH自愈环网和星型网的可靠性模型及可用度评估、网络冗余和过程层设备组网结构等。例证分析表明，采用SDH自愈环网的通道保护功能可以减小光纤故障对整个环网可靠性的影响，而提高接口的可靠性则是保证SDH环网可靠性的关键。