Control Design of Modular Self-Synchronizing AC- and DC-sided Parallel-Connected Three-Level NPC Inverters

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 6Sprache: EnglischTyp: PDF

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Staiger, Jochen; Bosch, Swen; Steinhart, Heinrich (Aalen University of Applied Sciences, Laboratory of Power Electronics and Electrical Drives, Germany)

This paper describes the control design of three self-synchronizing modular three-level NPC inverters, which are connected AC- and DC-sided in parallel, up to a theoretical infinite number. In addition, a worst-case analysis of the zero-sequence circulating current (ZSCC) control is illustrated. The control strategy of a virtual master-slave concept is described to ensure the self-synchronization of the inverters without communication. Experimental results proof the proper functionality with its control algorithms, especially related to the ZSCC.