标题：Communication-Less Control of Two-Stage Photovoltaic System with Multiple Distributed Dual-Input Central Capacitor Converters
作者：Liu, Jiaxin; Gao, Feng; Chen, Mengxing; Wang, Gongke
作者机构：[Liu, Jiaxin; Gao, Feng; Wang, Gongke] Shandong Univ, Sch Elect Engn, Jinan, Shandong, Peoples R China.; [Chen, Mengxing] Aalborg Univ, Dept Energy 更多
会议名称：10th IEEE Annual Energy Conversion Congress and Exposition (ECCE)
会议日期：SEP 23-27, 2018
来源：2018 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
关键词：communication-less; two-stage; photovoltaic system; droop control
摘要：When multiple distributed dc-dc converters are connected to the single rear-end inverter in the multi-string PV system, the communication between front-end converters and rear-end inverter is required for timely responding to the grid variation in tradition, which however to some extent will limit such application due to the communication reliability and cost. This paper therefore proposes a communication-less control scheme for this kind of two-stage PV system by properly assuming the voltage droop principle to regulate the generated real power. Doing so, the two-stage PV system with multiple distributed dc-dc converters can work well under both steady states and transient states. Matlab simulations can verify the effectiveness of the proposed control strategy.