Research On Channel Characteristics Of Relay Protection Based On PTN

With the rapid development of smart grids,power communication network ha s changed from SDH technology to IP packet technology.The new demand of the business promotes the development of communication technology,which makes the statistical multiplexing of power communication transmission network.This makes PTN technology the preferred networking technology for the construction of power communication network.For relay protection,the reliability,real-time performance,and transmission delay of the service transmission are extremely high,which challenges the transmission channel to carry the power communication TDM service.Hence,it needs sufficient theoretical support and sufficient simulation.data support.Firstly,based on the delay characteristics of PTN bearing TDM services,the paper establishes a delay mathematical model,which analyzes the composition of end-to-end transmission delay,and the describes uncertain delay distribution of of various network nodes of PTN.Then,the paper studies the uncertain time delay distribution of TDM service in PTN network nodes deeply,and proposes the numerical simulation algorithm design,and obtains the deterministic time delay distribution which can reflects all kinds of network nodes.Finally,the numerical simulation algorithm is used to program the queuing process and the algorithm for implementing the de-jitter buffer function.Combined with the service performance indicators,the parameters affecting the uncertain delay are optimized,and the parameters satisfying the communication indicators are set up.The simulation is verified by simulation.The analysis results of the delay mathematical model show that the end-to-end transmission delay can be divided into four parts and nine delay components.The queuing delay at each node is uncertain.Through numerical simulation algorithm,the deterministic distribution of uncertain delay can be obtained,which can reflect the uncertain time delays of various network nodes.By optimizing the cache depth and packet encapsulation length,the feasibility and correctness of the uncertain delay model are verified.The research results of this subject provide theoretical support for PTN to carry TDM services,and have certain technical guiding significance and engineering reference value in studying relay protection channel delay.