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通信系统的报文快速可靠传输是数字化变电站各种分布式功能实现的基础。在电力通信同步仿真软件EP-OCHS构建基于IEC61850标准的数字化变电站通信仿真模型。在NS2中添加报文优先级传输机制,为不同类型的报文分配不同的优先级。存在非实时数据流的背景下,仿真分析了采样值SAV报文和GOOSE报文分别在10Mbit/s和100Mbit/s交换式以太网的时延特点。仿真结果表明:端节点上层协议的开销和非实时数据流的冲击是影响实时传输的重要因素;数据流量优先级划分能确保重要报文的实时性。
Fast and reliable transmission of messages in communication systems is the basis for the realization of various distributed functions in digital substations. The Simulation Model of Digital Substation Communication Based on IEC61850 Standard in EP-OCHS of Power Communication. Add packet priority transmission mechanism in NS2 to assign different priorities for different types of packets. In the background of non-real-time data stream, the delay characteristics of SAE packets and GOOSE packets in 10Mbit / s and 100Mbit / s switched Ethernet are simulated and analyzed. The simulation results show that the overhead of the upper node of the end node and the impact of non-real-time data flow are important factors that affect the real-time transmission. The prioritization of data traffic can ensure the real-time performance of important packets.