Modular Multilevel Converter based on 5-level submodule with DC fault blocking capability

Conference paper (2016)

Authors

Ricardo Lizana Universidad Católica de la Santísima Concepción

Apparao Dekka Toronto Metropolitan University

Sebastian Rivera University of Toronto

Bin Wu Toronto Metropolitan University

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Published Date

21-12-2016

Language

English

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Abstract

The use of conventional half-bridge submodules in the Modular Multilevel Converters brings important benefits such as the reduction in the power losses and semiconductor devices. However, the system with half-bridge submodule lacks the capability of blocking DC-faults currents. In this paper, a 5-level submodule with DC-fault blocking capability is presented. The proposed submodule allows to operate with different internal capacitances in order to reduce the cost of the system. Furthermore, a control and balance strategy for the novel 5-level submodule is proposed.