Application Research of LoRa Technology In Photovoltaic Monitoring System

Photovoltaic (PV) power generation is one of the most promising renewable energy power generation systems. PV monitoring system is of great significance to ensure the stability and performance of the photovoltaic grid connected system. Because when the temperature of photovoltaic panel is high, the whole photovoltaic module may be damaged, and the power generation of photovoltaic panel will also be affected. Therefore, it is necessary to monitor the temperature of the photovoltaic panel. In this paper, we design a wireless PV monitoring system based on LoRa (long range) technology, which can monitor the front and back temperature of the photovoltaic panel in real time. First, the application architecture of LoRa in PV monitoring system is studied. Then, the software and hardware design is introduced. Finally, by conducting a system test and analysis, the communication distance of LoRa in a complex environment can reach 515 m, the battery life of acquisition node using LoRa can reach 2.93 years, the collected data are accurate and the system runs stably. The long-term monitoring data obtained by the monitoring system can provide important data support for the subsequent performance analysis and evaluation of photovoltaic panels, as well as the early warning of degradation and fault location of photovoltaic panels.