摘要
基于一种两组光伏池板串联后利用中点钳位三电平逆变器并网发电的方法是对中点钳位式三电平并网逆变器采用零序注入与中点电位不平衡补偿的控制,在交流并网电流不会因不平衡中点电位引起畸变的前提下,可以独立调节三电平逆变器的上下组直流电压。利用此原理,实现了两组串联光伏池板的独立最大功率点跟踪控制(MPPT),能够有效提高光伏系统的发电量。文中通过仿真和实验,验证了提出方法的有效性。
A photovoltaic power generation solution with two seried photovoltaic arrays using neutral point clamp（NPC） three-level converter is proposed in this paper. Through zero sequence injection and neutral point voltage unbalance compensation, up and down DC voltage in neutral point clamp three-level converter can be adjusted independently, with no output AC voltage distortion caused by unbalanced neutral point voltage. Based on this principal, up and down solar panels＇ independent MPPT control is realized and overall generated electric energy can be enhanced. Simulation and experiments are made to verify the goodness of proposed strategy.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第11期202-208,共7页
Transactions of China Electrotechnical Society
基金
双模式建筑光伏系统集成技术研究及关键设备研制资助项目(2011AA05A306)
关键词
不平衡补偿
中点钳位型
三电平变流器
零序电压
最大功率点跟踪
Unbalance compensation, neutral point clamp（NPC）, three-level converter, zerosequence voltage, maximum power point tracking（MPPT）
