Abstract:

A fire safety switch based on carrier communication is designed to address the fire safety issues of photovoltaic modules.The specific design of the breaker and the controller are carried out.The circuit breaker collects the voltage and current data of each PV module,transmits them to the controller via power line carrier communication,and then uploads them to the PV system monitoring platform via RS-485 to display the operation status of the PV module in real time.In addition,the PV module can be turned off through the PV system monitoring platform or manually pressing the shutdown button on the controller,which can greatly reduce the high voltage on the DC side of the PV in case of fire to ensure the personal safety.

Key words: PV modules, safety shutdown, carrier communication, online monitoring