Design And Setting Up Of PV Monitoring System Platform Based On DC Power Line Carrier Communication

In recent years,the photovoltaic industry has been swiftly popularized due to the reduction in the cost of installation and power generation of PV panels,derived from the rapid development of photovoltaic power generation technology.The existing PV monitoring system mainly monitors the condition of photovoltaic power generation.A set of technical solutions with characteristic high reliability and low cost based on carrier communication technology for data transmission on HVDC cables is presented in this paper,monitoring the operation of each specific PV module and applied to the PV module Serial communication.Power line carrier(PLC)communication technology has been an international research hotspot because of the power line serving as communication line and saving a lot of wiring costs.Since the mid-1980 s,PLC has entered the digital phase with the rise and development of integrated circuits and DSP technology.The current mature PLC technology is mainly used in the exchange environment to realize data transmission through the exchange of long-distance high-voltage power transmission cables.With the development of new energy technologies,an adaptable carrier communication technology is urgently needed in the DC power line environment.The DC environment used as the monitoring environment in this paper,multiple slave nodes are used to collect information of output voltage,current of target photovoltaic panels,and environmental data such as temperature,humidity and light intensity on the basis of the power line carrier technology.The collected data is encoded in accordance with the custom frame format.Then,the data signal is received and interpreting at the summary point after modulated and coupled to the power line modulation and transmitted to the master node through FSK modulation/demodulation technology and a series of power amplifier and filter circuits,and is exchanged to the PC or the mobile terminal through various communication methods selected according to different scenarios,including 232 communication,Ethernet interface and Bluetooth communication.