The Research Of Photovoltaic-Thermoelectric(PV-TE) Hybrid Power Systems

In the background of energy crisis and environmental pollution,and photovoltaic backplane is becoming cracking and yellow,Photovoltaic-Thermoelectric(PV-TE) hybrid power systems is proposed. Not only the problem of becoming cracking and yellow on solar panels due to high temperature has been solved,and the life of solar cells is extended,but also the utilization of solar energy is improved by using solar cells waste heat to generate electricity. Meanwhile, Nanchang Xixia reservoir hydro power intends to build a MW class water- light-storing micro-grid power generation system to meet surrounding user the demand for electricity and improve its reliability, which consists of building about 2MW solar PV-TE hybrid power system. So the study of solar PV-TE hybrid power system have a important practical implications and theoretical reference value.Firstly, simulation models are built on simulation platform Matlab/Simulink based on the mathematical model, for the two important components of PV-TE hybrid systems: solar photovoltaic cells and thermoelectric generators. And then their respective output characteristics are analyzed for the research of hybrid.Secondly, with respect to traditional natural cooling and circulation water cooling, and because of the application for reservoir, the cooling system of PV-TE hybrid system proposed in this paper has improved the efficiency of power generation of system and realized the recycling,by using reservoir noncirculating water to cooling thermoelectric cold side.Then, the simulation model of hybrid system is built based on the energy relationship between solar PV-TE hybrid system, simulating and analyzing of hybrid systems in the setting environment, and comparing with conventional PV systems. The simulation results show that water flow of cooling system, heat transfer coefficient of photovoltaic panels and merit of thermoelectric generators are three important factor in a hybrid system. Compared with the traditional solar photovoltaic systems, the output power and efficiency of power generation of PV-TE hybrid systems have been improved.Meanwhile, for the example of 250 Wp electricity generation system, investment economic analysis has been done for solar PV-TE hybrid systems by compared with conventional PV systems. The system is expected to be profitable in 10 years through calculating the cost of various aspects, and also has a good environmental benefits.Finally, the DC/DC network problem of solar PV-TE hybrid systems has been researched. The two-input boost converter is proposed, and the feasibility of conversion circuit is verified by simulation.