基于高效PERC双面太阳电池的中大型光伏发电系统支架排布分析

Analysis of Bracket Configuration of Large Photovoltaic Power Generation Systems Based on High Efficiency PERC Bifacial Solar Cells

以青海柴达木盆地大中型光伏发电系统设计为例,探讨钝化发射极背面接触(Passivated Emitter Rear Contact,简称PERC)太阳电池代替常规太阳电池,以及不同支架排布对光伏系统发电效率的影响.我们采用比常规太阳电池功率高26%的高效PERC太阳电池及PVsyst模拟对单角度固定式、双角度固定式、单轴东西向跟踪式、单轴南北向跟踪式和双轴跟踪式等不同排布的光伏系统进行设计分析.结果发现,双轴跟踪式排布系统的年发电量最多,但占地面积也最大,南北向跟踪式排布的单位占地面积发电量比单角度固定式提高了14%.即采用高效PERC电池南北向跟踪式排布比常规电池单角度固定式的系统发电量提高了40%,同时降低了系统的成本.

This paper takes the design of large and medium-sized photovoltaic power generation systems in Qinghai＇s Qaidam Basin as an example to explore the effect of PERC（Passivated Emitter Rear Contact） solar cells in replacing the conventional solar cells and effects of different support arrangements on the efficiency of the photovoltaic power generation system. We use the PERC solar cells which are 26% higher in efficiency than the conventional solar cell and PVsyst simulation to analyze the different arrangements of PV systems, such as single angle fixed, double angle fixed, east-west tracking, north-south tracking and two axis tracking systems. It is found that the two axis tracking arrangement has the largest annual power generation, but the area taken up is also the largest. The unit power generation per unit area of the north-south tracking system was 14% higher than that of the single angle fixed arrangement. That is to say, north-south tracking PERC solar cells can increase the power generation by 40% compared with the conventional solar cell arrangement while reducing the cost of the system.