OTN technology has been widely used in smart grid, which improves transmission speed, transmission efficiency and transmission capacity of the network. In order to supervise the operation of the network in real time and improve quality of service (QoS), we need to make a quantitative assessment of operation quality for OTN in smart grid. In this paper, we propose LM-BP evaluation method to assess the operation quality of OTN in smart grid. At first, we give the evaluation indicator system. Secondly, we introduce LM-BP algorithm. At last we make simulation experiments based on MATLAB with last 10 years network operation data of a province electric power OTN company in smart grid. The simulation results show that BP neutral network optimized by Levenberg-Marquardt (LM) algorithm has shorter training time, faster convergence rate and better prediction accuracy than that standard BP neutral network. Demonstrating a new method of LM-BP network in operation quality evaluation of OTN in Smart grid is feasible, effective and reasonable.
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