Parallel Operation Control of Inverters for Photovoltaic Uninterruptible Power Supply Systems

• Main Authors: Kuo-An Liao, 廖國安
• Other Authors: Chih-Chiang Hua
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/38902686631487286244

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 89 === This thesis presents a control technique for operating two or more single phase inverter modules in parallel with no auxiliary interconnections. In the proposed parallel inverter system, all the modules have the same circuit configuration, and each module includes an inner current loop and an output voltage loop control. With power sharing control, the load sharing can be automatically achieved and the output current of each inverter can be accurately limited to its maximum rating. This technique uses frequency and fundamental voltage droop to allow all independent inverters to share the load in proportion to their capacities. From the simulation and experiment results, the proposed control for PVS inverters is verified.