供配电线路自适应保护系统通信性能分析

Communication Performance Analysis on Adaptive Protection System of Power Supply and Distribution Line

为验证供配电线路自适应保护系统的通信性能,基于DeviceNet现场总线和工业以太网构建了其通信网络。提出了现场总线传送延时模型和性能评价指标,评估了自适应保护系统DeviceNet通信在状态改变和轮询这2种数据触发方式下的传送延时、吞吐量、网络效率、网络利用率;给出了交换式工业以太网传送延时的组成及基本公式,分析了自适应保护系统内交换式工业以太网周期性通信的传送延时。仿真结果表明,该系统DeviceNet通信和工业以太网通信在实时性、可靠性方面均能满足变电站自动化的要求。

To validate the communication performance of the adaptive protection system of power supply and distribution line, the system＇s communication network is constructed based on DeviceNet fieldbus and industrial Ethernet. Transmission time delay model and performance evaluation indices of fieldbus are presented. Transmission time delay, throughput, network efficiency and network utilization of DeviceNet communication of the system are evaluated. Constitution of transmission time delay and general formulas of industrial Ethernet are presented. Transmission time delay of industrial Ethernet periodic communication of the system is analyzed. Results of simulation indicate that the real time performance and reliability of DeviceNet and industrial Ethernet communication of the system can satisfy the requirement of substation automation.