Design Of User-side Communication System For Smart Grid Based On Internet Of Things

Smart grid user-side communication system is an important part of the smart grid,its purpose is to build a real-time information exchange platform between the power company and users,and help grid companies use the real-time information of each user to build a stable and reliable power supply system.At the same time it can provide users with more humane,diversified intelligence services.IoT technology can effectively improve the level of smart grid communications,with its real-time nature,reliability,and powerful data processing capabilities.First,apply the Internet of Things technology to the smart grid user-side communication system.Using ZigBee,LoRa,Wi-Fi and the Internet of Things cloud platform technology,a set of mature and reliable technical solutions have been designed.In terms of hardware design,multiple smart meter modules,ZigBee routers,ZigBee terminal nodes,LoRa terminal nodes,and gateways composed of ZigBee coordinator,LoRa concentrator,and Wi-Fi controller are designed.In terms of software design,the acquisition of voltage,power,and other power information is achieved through the integration of multi-channel smart meter data acquisition and data analysis and fusion program design.Building ZigBee Tree Network to Realize Communication Between ZigBee Endpoints and ZigBee Coordinators.Build LoRa star network to realize communication between LoRa terminal node and LoRa concentrator.Through the gateway program design,protocol conversion between ZigBee,LoRa and Wi-Fi networks is realized,and the information transmission between the user and the cloud platform is completed.Then,a theoretical study of interference issues in the smart grid communications.A continuous convex approximation algorithm is proposed to solve the long-distance network communication interference problem,and simulation verification is performed using MATLAB software.At the same time,by analyzing the characteristics of 2.4G network,a set of ZigBee network anti-jamming strategy composed of two parts of channel quality assessment and channel hopping algorithm is designed.Then,use the experimental platform to verify the strategy.The ZigBee anti-interference strategy developed in this paper is applied to the designed system to ensure the normal communication of the system in the wireless network congestion state.Finally,using the IoT cloud platform to simulate the power company cloud management platform,a complete physical platform was constructed to test the various communication subsystems and overall functions of the system.