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研究了多业务传送平台(MSTP)网络汇聚型以太网业务的环形开法(以一个或几个以太环网将各厂站与调度机构串联起来)在电力系统中的应用。通过数学建模计算、采用南方电网主干通信网实际案例印证等手段,对比了环形开法和星形开法(开通从各厂站至调度机构的点对点以太网业务)的链路带宽消耗、中心站以太网端口和汇聚处理能力消耗、业务可靠性等指标。结果表明,环形开法在业务可靠性、中心站以太网业务汇聚能力消耗上较星形开法有明显优势;当每站的业务带宽需求相对2 048kbit/s较小时,环形开法在链路带宽消耗、中心站以太网端口数量消耗上较星形开法也有明显优势;仅在每站的业务带宽需求大于2 048kbit/s时,环形开法在链路带宽消耗、中心站以太网端口数量消耗上的优势不明显或没有优势。最后,根据计算结果,提出了应用环形开法的几点建议。
The ring opening method of MSTP network convergent Ethernet service (using one or several Ethernet rings to connect various plant stations and dispatching agencies in series) is studied in power system. By means of mathematical modeling and calculation, this paper uses the actual case verification of China Southern Power Grid backbone communication network to compare the link bandwidth consumption of ring open method and star open method (to open the point-to-point Ethernet service from each plant station to the dispatch agency) Station Ethernet port and aggregation processing power consumption, business reliability and other indicators. The results show that the ring opening method has obvious advantages over the star opening method in terms of service reliability and convergence of Ethernet service in the central station. When the service bandwidth requirement per station is relatively small at 2048 kbit / s, Bandwidth consumption, the number of central station Ethernet port consumption than the star open method also has obvious advantages; only when the business bandwidth needs of each station is greater than 2048kbit / s, the ring open method in the link bandwidth consumption, the number of central station Ethernet ports Consumption advantage is not obvious or no advantage. Finally, according to the result of the calculation, some suggestions of applying the ring opening method are put forward.