Natural balancing of multicell converters

[摘要] ENGLISH ABSTRACT: Multilevel converters were developed as a result of a growing need for higher power converters.This dissertation addresses a specific multilevel topology called the multicell topology. A problemassociated with this topology is cell capacitor voltage unbalance. This dissertation addresses the issueof natural balancing of multicell converters. The topology is mathematically analysed and a theory isdeveloped to explain the natural balancing mechanism. The study of the natural balancing propertyincludes a detailed harmonic-, steady-state- and time constant analysis. The theory is verified by acomparison between the theoretical-, simulated- and experimental results.

[发布机构] Stellenbosch University