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A Simple Virtual-Vector-Based PWM Formulation for Multilevel Three-Phase Neutral-Point-Clamped DC–AC Converters including the Overmodulation Region
(2022-02-01)
Article
Open AccessNeutral-point-clamped (NPC) power conversion topologies are among the most popular multilevel topologies in current industrial products and in industrial and academic research. The proper operation of multilevel three-phase ... -
Fast Reliability Assessment of Neutral-Point-Clamped Topologies through Markov Models
(Institute of Electrical and Electronics Engineers (IEEE), 2021-12-01)
Article
Open AccessThis article presents detailed Markov models for the reliability assessment of multilevel neutral-point-clamped (NPC) converter leg topologies, incorporating their inherent fault-tolerance under open-circuit switch faults. ... -
Reliability assessment of a fault-tolerant PV multistring inverter
(2020-12-10)
Article
Open AccessIn photovoltaic (PV) systems, the reliability of the system components, especially the power converters, is a major concern in obtaining cost effective solutions. In order to guarantee service continuity in the case of ... -
Multibattery-fed neutral-point-clamped DC-AC converter with SoC balancing control to maximize capacity utilization
(Institute of Electrical and Electronics Engineers (IEEE), 2020-01-01)
Article
Open AccessThis paper studies a multilevel multiphase dc-ac conversion system configured by a neutral-point-clamped converter fed by multiple battery packs connected in series. A virtual-vector modulation is selected and a state-of-charge ... -
Modulation and capacitor voltage balancing control of multilevel NPC dual active bridge DC-DC Converters
(Institute of Electrical and Electronics Engineers (IEEE), 2020-04-01)
Article
Open AccessThe present paper provides a solution to operate multilevel dual active bridge (ML-DAB) converters built upon neutral point clamped switching legs in a full-bridge disposition and with any number of levels on either side ... -
Switching-Cell Arrays - An Alternative Design Approach in Power Conversion
(Institute of Electrical and Electronics Engineers (IEEE), 2018-03-14)
Article
Open AccessThe conventional design of voltage-source power converters is based on a two-level half-bridge configuration and the selection of power devices designed to meet the full application specifications (voltage, current, etc.). ... -
A modulation strategy to operate multilevel multiphase diode-clamped and active-clamped DC-AC converters at low frequency modulation indices with DC-link capacitor voltage balance
(2017-10-01)
Article
Open AccessThis paper proposes a modulation strategy for multilevel multiphase diode-clamped dc–ac converters (also applicable to other functionally equivalent topologies) able to keep the dc-link capacitor voltages balanced under ... -
A Novel approach to generate effective carrier-based pulsewidth modulation strategies for diode-clamped multilevel dc-ac converters
(Institute of Electrical and Electronics Engineers (IEEE), 2016-11-01)
Article
Open AccessSeveral pulsewidth modulation (PWM) strategies have been proposed for three-phase multilevel converters. Typically, these PWM methods can be either space-vector or carrier-based implemented, where the carrier-based ... -
Predictive control of a back-to-back NPC converter-based wind power system
(Institute of Electrical and Electronics Engineers (IEEE), 2016-07-01)
Article
Open AccessAs wind power technology points to increase power ratings, the implementation based on a permanent-magnet synchronous generator (PMSG) with a full-power converter is expanding its market share. Multilevel converters, as ... -
Decoupled DC-Link capacitor voltage control of DC-AC multilevel multileg converters
(Institute of Electrical and Electronics Engineers (IEEE), 2015-10-27)
Article
Open AccessThis paper studies the coupling between the capacitor voltage control loops of diode-clamped (or functionally equivalent) multilevel multileg (multiphase) dc-ac converters. From a complete model of the plant revealing the ... -
Operating Principle and Performance Optimization of a Three-Level NPC Dual-Active-Bridge DC-DC Converter
(Institute of Electrical and Electronics Engineers (IEEE), 2015-09-23)
Article
Open Access© 1982-2012 IEEE. Aiming to improve the performance features of conventional two-level dual-active-bridge (DAB) converters, this paper presents a three-level neutral-point-clamped (NPC) DAB dc-dc converter. A general ... -
Model predictive current control of grid-connected neutral-point-clamped converters to meet low-voltage ride-through requirements
(Institute of Electrical and Electronics Engineers (IEEE), 2015-03-01)
Article
Open AccessThe low-voltage ride through (LVRT) requirement demands the wind power plants to remain connected to the grid in the presence of grid voltage dips, actively helping the network overall control to keep network voltage and ...
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