Abstract
In order to ensure that the smart grid backbone communication network architecture model has a good universality, a two-layer QoS (Quality of Service) optimization modelling method of the backbone communication networks for power protection services is proposed. Firstly, taking the communication network capacity as a constraint, the minimum value of time-QoS of the system protection service is the optimization goal, and a two-layer capacity optimization model of service quality assurance is constructed. Secondly, the optimization model is simplified and a simulation experiment is designed. The validity of the proposed method is verified by numerical examples. The simulation results of the optical layer and the electrical layer satisfy the power system protection time delay specified in the power system protocol should meet the requirement of less than 50 ms.
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