光伏并网逆变器的群控技术

并网逆变器作为光伏发电系统的核心装置,对系统的运行效率有重要影响。群控技术是一种有效提高系统运行效率的手段。文章首先对群控技术进行了详细的描述,随后对采用具有群控功能的逆变器构成的发电系统与采用常规逆变器构成的发电系统的实际发电量进行了统计与分析。实际运行结果表明,群控技术可以在一定程度上提高系统发电量。

Group control technology of PV grid-connected inverters

The grid-connected inverter is a chief device in the PV generation system,and it has significant effect on the operation efficiency of the generation system.Group control strategy can improve the PV system efficiency prominently.This paper introduces the concept of the group control strategy in detail first.After that a comparison experiment is carried out between a PV generation system constructed of ordinary grid-connected inverters and a system constructed of group control grid-connected inverters.The actual output data of the two systems are recorded and analyzed.The experiment proves that the group control strategy can improve the system efficiency.