A Decentralized Controller Architecture for a Cascaded H-Bridge Multilevel Converter

作者：McGrath Brendan P^*; Holmes Donald Grahame; Kong Wang Y

来源：IEEE Transactions on Industrial Electronics, 2014, 61(3): 1169-1178.

DOI：10.1109/TIE.2013.2261032

• Current regulation
• decentralized control
• modular cascaded converter
• power electronic building block

Despite its inherently modular hardware structure, the control system of most cascaded H-bridge converters is usually highly centralized and relies on a high-bandwidth intraconverter communication system to transmit time critical control signals to the module controllers. In contrast, this paper presents a decentralized control strategy for a modular cascaded converter, where each module controller determines its own switching actions based on local sensors, a local current regulator, and a local modulator. The system achieves the same performance as an optimized centralized control system while only requiring a low intraconverter communication bandwidth.

• 出版日期2014-3