基于QoS的变电站设备无线监测网络拓扑研究

随着无线传感器网络在智能变电站不同业务应用中的深化,网络的高数据率传输和网络的服务质量（qual-ity of service,QoS）问题成为无线传感器网络（wireless sensor network,WSN）的新热点。针对智能变电站的设备状态监测应用,利用无线传感器网络技术,建立分簇的三层智能变电站设备无线监测网络结构；参考 Zigbee协议和 IEC 61850报文规定,对监测网络数据流进行建模；从用户感知 QoS、网络 QoS 和节点 QoS 三个方面,结合Opnet仿真功能,提出包括端到端时延、MAC层时延、MAC层吞吐率、MAC层丢包率、数据碰撞、丢包率、比特误码率、信噪比和接收功率的QoS指标。根据实际变电站设备监测配置,建立起仿真网络模型,仿真研究表明相比于树状拓扑、Mesh拓扑网络,设计的簇状拓扑网络具有更好的QoS综合性能。

Research on Substation Equipment Wireless Monitoring Network Topology Based on QoS

With deepening of wireless sensor network in different business applications of intelligent substation,high data transmission rate and service quality of the network becomes a new hot point of wireless sensor network. Aiming at equip-ment state monitoring application of the intelligent substation,clustering three layers substation equipment wireless monito-ring network structure was established by using wireless sensor network technology. Regarding Zigbee protocol and IEC 61850 message rules as references,modeling for monitoring network data flow was conducted. In aspects of user perception QoS,network QoS and node QoS and combining Opnet simulation function,QoS index including end-to-end time delay, MAC layer time delay,MAC layer throughput rate,MAC layer packet loss probability,data collision,packet loss proba-bility,bit error ratio,signal to noise ratio and received power were proposed. According to practical substation equipment monitoring configuration,simulation network model was established. Simulation research indicated that compared with tree topology and Mesh topology network, the designed clustering topology network was provided with better comprehensive QoS performance.