Design And Implementation Of "PV/Battery/SOFC" Multi-energy Hybrid Power Generation Monitoring System In Rural Areas

At present,the power supply infrastructure(including the power grid)in remote rural areas is generally relatively backward,and the quality of power is not guaranteed.As we all know,the output of electric energy mainly depends on energy consumption.The traditional energy sources mainly based on fossil fuels(coal,oil and natural gas,etc.),along with their continuous consumption,not only face the problem of declining reserves but also global environmental pollution.Vigorously developing renewable energy can not only achieve a stable and clean supply of rural electricity but also help the construction of new countryside in China.The multi-energy hybrid power generation system is an efficient power generation mode that makes full use of renewable energy,clean energy and energy storage technology.In this paper,for rural and remote areas,taking the multi-energy hybrid power generation system as the research object,a “PV/Battery/SOFC” multi-energy hybrid power generation system based on photovoltaic,new type of high-temperature solid oxide fuel cell(SOFC)as distributed generation unit and storage battery as energy storage unit is proposed and implemented.The system combines distributed generation and energy storage units,which is a reasonable and effective independent power supply system.It can make up for the shortage of electricity in remote rural areas.In addition,in order to ensure the normal operation of the power generation system,the existence of the power generation monitoring system has become inevitable.The main work of this paper is as follows.First of all,the overview of rural renewable energy resources and the background of rural multi-energy hybrid power generation system are introduced.The research status of multi-energy hybrid power generation system and power generation monitoring system are reviewed.Then,the working principle,mathematical model and working characteristics of photovoltaic power generation,battery charging and discharging,fuel cell power generation and the power conversion circuit in multi-energy hybrid power generation system are analyzed in detail.A new type of high-temperature solid oxide fuel cell is adopted to optimize the power supply type for the power generation system.Next,aiming at the safety,stability and convenience of the power generation system,a multi-energy hybrid power generation monitoring system is designed to monitor and control the dynamic data and environmental information of each unit in the system.According to the working characteristics of the energy unit and the energy storage unit,the control strategy corresponding to the power electronic interface conversion circuit is developed.The monitoring module is based on the control strategy of the interface conversion circuit,focusing on PLC control technology.The module uses PLC as the monitoring system controller to collect and feedback the operation data of system in real time.The intelligent switching of multiple operation modes of the system is completed,and the energy balance management among photovoltaic array,high-temperature fuel cell and battery is realized.In addition,a wireless communication network based on LoRa technology is specifically designed and implemented for the monitoring system to collect and transmit the monitoring data required in the monitoring system.Finally,an experimental study on the“PV/Battery/SOFC” multi-energy hybrid power generation system is designed,which proves the feasibility and reliability of the multi-energy hybrid power generation monitoring system.