分布式光伏发电系统接线方案优化

Optimization of wiring scheme for distributed photovoltaic power generation system

近年来,光伏发电行业发展迅猛,装机容量经历了爆发式的增长。由于国家政策的影响,鼓励发展分布式光伏发电,分布式光伏发电也得到了快速发展。低压并网的分布式光伏发电系统一般采用组串式逆变器,通过低压400 V系统并入电网,光伏发电系统中各设备的布置、电缆的选型对于整个光伏发电系统的投资具有决定性的作用。对分布式光伏发电系统中设备布置及电缆选型进行了分析及推导计算,编制了光伏系统接线方案优化计算书,能自动计算不同光伏发电系统接线方案的各项指标,并通过实际工程算例说明了计算书的可行性。

In recent years,the industry of photovoltaic power generation has developed rapidly,of which the installed capacity has experienced explosive growth.The development of distributed photovoltaic power generation is supported by national policies,achieving a high growth rate.The string inverters are generally used in distributed photovoltaic power generation systems connected to 400 V low voltage grid.The arrangement of various equipment and selection of cable in the photovoltaic power generation system plays an important role in the investment of the entire photovoltaic power generation system.The layout of equipment and selection of cable in the distributed photovoltaic power generation system are analyzed and deduced,and the optimization calculation book of the wiring scheme of photovoltaic system is compiled.The index parameters of different wiring schemes can be automatically calculated.The feasibility of the optimization calculation book is illustrated by a practical engineering example.