变电站站内防误系统无线组网设计

Design of Wireless Networking for Preventing Mal-operation System in Substation

为实现将防误系统中依赖4G的外网数据交互替换为基于LoRa的自组网通信,文章设计站内无线网络解决方案,在兼容输变电物联网传感器监测应用基础上实现站内自组网,包括网络架构设计及终端入网通信,将防误终端集成到传感器监测网络。针对原有物联网协议的传感器监测设计,以及手持控制终端接入时的传输实时性差、频点切换慢的问题,设计优化方案,在传感器采用竞争时隙的同时,引入操作终端固定时隙预分配方案,提高数据交互效率,并通过同步扫描设计实现移动作业频点自适应切换。验证结果表明,所提系统可在兼容输变电物联网监测方案基础上,满足防误系统的实时性控制类作业应用。

In order to replace 4G dependent data interaction in error prevention systems with LoRa based ad hoc network communication,a wireless networking implementation of the preventing mal-operation system was designed.The implementation is based on the wireless networking specification for the Internet of power transmission and transformation equipment.The solution includes LoRa wireless network design and accessing network scheme for preventing mal-operation prevention terminal,realizes preventing mal-operation control in monitoring network.The original IoT protocol is designed for sensor monitoring,a new optimization scheme is proposed in order to solve the problem of inferior real-time transmission and network frequency switching for mobile devices.Ensuring compatibility with contention slot protocol for existing sensors,a new fixed time slot allocation is added for mobile devices to improve the data interaction,and a synchronous scanning scheme is designed for frequency switching efficiency.After testing and verifying in the pilot station,the optimization scheme can realize high real-time mobile operation application of mobile device,and compatible wireless communication scheme of power transmission and transformation Internet of things.