Results 21 to 30 of about 1,408 (165)

Leg-Balancing Control of the DC-link Voltage for Modular Multilevel Converters [PDF]

Journal of Power Electronics, 2012
This paper applies carrier phase shifted pulse-width modulation (CPS-PWM) to transformerless modular multilevel converters (MMC) to improve the output spectrum. Because the MMC topology is characterized by the double-star connection of six legs consisting of cascaded modular chopper cells with floating capacitors, the balance control of the DC-link ...
Sixing Du, Jinjun Liu, Jiliang Lin
openaire   +1 more source

A Harmonic Voltage Injection Based DC-Link Imbalance Compensation Technique for Single-Phase Three-Level Neutral-Point-Clamped (NPC) Inverters

Energies, 2018
In three-level neutral-point-clamped (NPC) inverters, the voltage imbalance problem between the upper and lower dc-link capacitors is one of the major concerns.
Kyoung-Pil Kang, Younghoon Cho, Myung-Hyo Ryu, Ju-Won Baek   +3 more
doaj   +1 more source

Hybrid Modular Multilevel Converter Design and Control for Variable Speed Pumped Hydro Storage Plants

IEEE Access, 2021
Hybrid modular multilevel converter control and design for pumped hydro storage plants is presented, addressing application-specific shortcoming of conventional back-to-back half-bridge modular multilevel converter: high common-mode-voltage machine ...
Miodrag Basic, Milan Utvic, Drazen Dujic
doaj   +1 more source

A Dynamic Model and Modified One-Cycle Control of Three-Level Front-End Rectifier for Neutral Point Voltage Balance

IEEE Access, 2017
This paper presents a dynamic phasor-based model for three-level front-end VIENNA rectifiers. The proposed model comprehensively predicts the behavior of the ac- and dc-side variables of the rectifier on which the issue of neutral point (NP) voltage is ...
Tiefeng Gao, Sen Zhang, Songbo Zhang, Jianfeng Zhao   +3 more
doaj   +1 more source

Model Predictive Current Control for Fault-Tolerant Bidirectional Voltage Source Converter With Open Circuit Fault and Unbalanced Grid Voltage

IEEE Access, 2020
To improve the fault-tolerant operation capability of bidirectional voltage source converter (BVSC), an improved model predictive current control (IMPCC) for fault-tolerant BVSC, is proposed with balanced DC-link capacitor voltage under unbalanced grid ...
Shiyang Hu, Guorong Liu, Nan Jin, Leilei Guo   +3 more
doaj   +1 more source

Improved voltage balancing scheme for the MLI based DSTATCOM with Sliding Mode Controller

Journal of Applied Science and Engineering
In this article is used to demonstrate of sliding mode controller (SMC) for a multilevel inverter based distributed static compensator (DSTATCOM)for compensation of current harmonics related power quality issues and dc side capacitor voltage balancing of
Kalagotla Chenchireddy, V Jegathesan
doaj   +1 more source

Coordinated Capacitor Voltage Balancing Method for Cascaded H-Bridge Inverter with Supercapacitor and DC-DC Stage

CES Transactions on Electrical Machines and Systems
Cascaded H-bridge inverter (CHBI) with supercapacitors (SCs) and dc-dc stage shows significant promise for medium to high voltage energy storage applications.
Ye Zhang, Zixin Li, Fanqiang Gao, Cong Zhao, Yaohua Li   +4 more
doaj   +1 more source

A Novel Control Strategy for DC-Link Voltage Balance and Reactive Power Equilibrium of a Single-Phase Cascaded H-Bridge Rectifier

Energies, 2018
The dc-link voltage balance and reactive power equilibrium of the cascaded H-bridge rectifier (CHBR) are the prerequisites for the safe and stable operation of the system.
Chengwei Luo, Derong Luo, Shoudao Huang, Gongping Wu, Hongzhang Zhu, Qianjun He   +5 more
doaj   +1 more source

Four-Switch Three-Phase PMSM Converter with Output Voltage Balance and DC-Link Voltage Offset Suppression [PDF]

Information, 2017
High power quality, efficiency, complexity, size, cost effectiveness and switching losses of the direct current to alternating current (DC–AC) conversion system are crucial aspects in industrial applications. Therefore, the four-switch three-phase inverter (4S3P) has been proposed as an innovative inverter design.
Fadil Hicham, Driss Yousfi, Elhafyani Mohamed Larbi, Aite Youness   +3 more
openaire   +2 more sources

DC Link Voltage Balancing for Enhanced Performance in Multilevel Inverter-based Distribution Static Synchronous Compensator

Majlesi Journal of Electrical Engineering
This article describes the use of a sliding mode controller (SMC) in conjunction with an integral (PI) controller for a MLI based DSTATCOM to balance dc side voltage, control a cascaded H-bridge inverter, and compensate for power quality issues related ...
Kalagotla Chenchireddy, Mulla Gouse Basha, Vislavath Kumar, Shabbier Ahmed Sydu   +3 more
doaj   +1 more source