广域继电保护分层系统结构的网络拓扑设计

Network topology design for hierarchical system structure of wide-area protection

广域继电保护为解决现有传统后备保护存在的突出问题提供了一种新的思路。实时、可靠的通信网络是实现广域继电保护的基础,为此,设计了广域继电保护的分层系统结构,将全网分为三层,即接入层、汇聚层、核心层。随后设计了变电站全站统一网络拓扑结构,将广域继电保护IED接入间隔层公共交换机,可收集站内相关间隔的信息。在接入电力通信网方面,将广域继电保护IED单独接入MSTP的一个以太网口的方式,建立了基于HVPLS的广域继电保护分层系统以太网网络拓扑结构、广域网络的信息传输方式和冗余设计方案。

Wide area protection provides a new way to solve the outstanding issues of traditional backup protection. Real-time and reliable communication network is the foundation of wide-area protection. So the paper firstly designs a hierarchical structure of wide-area protection system, which divides the power grid into three layers, namely, access layer, convergence layer and core layer. Then, a substation unified network topology is designed, so that the IED of wide-area relay protection can collect information of relevant bay equipments by accessing bay level public switches. In terms of accessing to power communication network, the IED of wide-area relay protection accesses an Ethernet port of MSTP separately. A hierarchical structure network topology of wide-area protection, wide-area network information transmission mode and redundant scheme are designed based on HVPLS.