Design of Wireless Monitoring System for Power Terminal Equipment based on NB-IoT

Abstract

Abstract The application of Low-Power Wide-Area Network (LPWAN) technology in wireless monitoring of power terminal equipment is studied in this paper. From the aspects of hardware and software design of monitoring terminal, communication protocol, remote data management cloud platform, the wireless monitoring system of power terminal based on Narrow Band Internet of Things (NB-IoT) is designed in detail. STM32L151 is chosen as the main controller of the monitoring terminal owing to its low power consumption. After simple edge calculation and data packaging, the terminal equipment status information is reported to the remote data management platform via NB-IoT network based on system setting. The platform supports various functions such as a variety of terminal access methods, terminal identity authentication, parameter configuration, data forwarding, and terminal abnormal data information reporting and so on. In order to improve the User Datagram Protocol (UDP) transmission reliability, the terminal drop detection mechanism is designed on UDP communication protocol. Eventually, the system is applied in monitoring power terminal equipment status such as transmission and distribution pole tower, power well cover, cable trench cover, knife brake of distribution line, etc. The experimental results show that the power terminal monitoring system based on NB-IoT can achieve unified access and centralized management of power equipment status information in different power scenarios, and this system greatly enhances the reliability and efficiency of power system terminal equipment operation and maintenance, and has value in engineering.