Design And Implementation Of Power Monitoring System For Public Buildings Based On NB-IoT

With the continuous promotion of urbanization,the energy consumption of public buildings in China has risen significantly with the increase in area.In this context,most of the common electricity monitoring systems for public buildings currently on the market use smart meters with buses for on-site data collection,which has problems such as a large amount of wiring work and inconvenient maintenance.At the same time,some existing building electricity monitoring systems are unable to effectively control abnormal electricity consumption,and are unable to eliminate safety hazards in a timely manner,and are prone to waste of electricity,making it difficult to formulate relevant policies and further promote energy conservation in public buildings.Based on the research of existing building electricity monitoring system,this paper uses NB-IoT(Narrow Band Internet of Things)technology to design and implement a public building electricity monitoring system.The main work of this paper is as follows:(1)Combined with the wireless communication technology NB-IoT,a simpler,more stable and easier to deploy electricity monitoring system for public buildings is designed.The system consists of a wireless monitoring network and a electricity management platform,with the wireless monitoring network comprising two parts: the monitoring nodes and the cloud platform.(2)According to the overall system architecture,build the wireless monitoring network.Complete the hardware design of the monitoring nodes and write the programs of each part in a modular design method to realize the monitoring,display and control of electricity consumption of the loads connected to the nodes.Based on the MQTT protocol,the wireless communication module of the node is interfaced with the cloud platform to realize the data transmission of the wireless monitoring network.(3)Build the electricity management platform,design the platform database and user interface.Utilize the server-side subscription function and the cloud development SDK of the cloud platform,the electricity management platform is docked with the cloud platform to realize the data transmission of the whole system,and then realize the functions of real-time data display,historical data query and command issuance of the electricity management platform.(4)The overall test of the electricity monitoring system for public buildings designed in this paper was conducted to verify the system data transmission and the functions of each part.The results show that the system works well,the data can be transmitted stably,and the system functions achieve the expected purpose.