Results 11 to 20 of about 4,728,345 (132)

Steady‐state power operation region of a modular multilevel converter connecting to an AC grid

open access: yesHigh Voltage, 2021
The modular multilevel converter (MMC) has become a widely used topology for voltage source converter–based high‐voltage direct current transmission projects.
Jiecong Wang   +4 more
doaj   +1 more source

An improved four‐layer capacitor voltage control strategy combined with arm current control for transformerless modular multilevel converters

open access: yesIET Power Electronics, 2023
In order to improve the performance of the transformerless modular multilevel converters (MMC) under AC and DC grid fault conditions, this paper proposes an improved four‐layer capacitor voltage control strategy combined with arm current control.
Dan Liu   +5 more
doaj   +1 more source

A hybrid half‐bridge submodule‐based DC–DC modular multilevel converter with a single bidirectional high‐voltage valve

open access: yesIET Generation, Transmission & Distribution, 2023
Modular Multilevel Converters (MMCs) are promising candidates for high‐voltage high‐power applications. The main challenge of the MMCs is the zero‐frequency operation.
Ahmed Elserougi   +2 more
doaj   +1 more source

High‐voltage direct current fault current interruption: A technology review

open access: yesHigh Voltage, 2021
This review paper describes fault current interruption principles and various high‐voltage direct currrent (HVDC) circuit breaker technologies. First, fundamentals of HVDC fault current interruption and a generic set of requirements of HVDC circuit ...
Rene P. P. Smeets, Nadew A. Belda
doaj   +1 more source

Modelling and stability assessment of the MMC‐HVDC energy interconnected system with the cyber delay of communication network

open access: yesIET Energy Systems Integration, 2021
Modular multilevel converters (MMCs) are favoured in high voltage direct current (HVDC) systems because of huge energy transmission capacity and few harmonics. However, the complicated control and the intricate communication network introduce cyber delay
Jingming Cao   +5 more
doaj   +1 more source

Transient fault identification method for bipolar short‐circuit fault on MMC‐HVDC overhead lines based on hybrid HVDC breaker

open access: yesHigh Voltage, 2021
A bipolar short‐circuit transient fault identification method for overhead transmission lines in modular multi‐level converter‐based high voltage direct current (MMC‐HVDC) grid based on the hybrid HVDC breaker is proposed.
Botong Li   +5 more
doaj   +1 more source

State-variable approach to analysis of power systems including HVDC convertors

open access: yesInternational Journal of Electrical Power & Energy Systems, 1987
Abstract A new method is presented for the analysis of power systems including static convertors. The basic feature of the proposed method is that the state equations of each component of a power system can be written separately by considering fictitious sources at their terminals.
A. Lygdis   +3 more
openaire   +1 more source

Modular multilevel converter‐based voltage source converter high‐voltage direct current valve operating test circuit

open access: yesIET Power Electronics, 2023
It is very important to obtain high reliability in the high‐voltage direct current (HVDC) system operation because of extremely high and huge power capacity.
Chi‐Hwan Bae   +2 more
doaj   +1 more source

Assessment and enhancement control for small‐signal voltage stability of VSC‐HVDC systems supplying passive industrial loads

open access: yesIET Generation, Transmission & Distribution, 2023
This paper presents a comprehensive assessment for the small‐signal voltage stability of voltage source converter (VSC)‐HVDC systems supplying industrial loads represented by the induction motors (IMs) and provides a stability enhancement control for the
Yicheng Xue   +5 more
doaj   +1 more source

Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault

open access: yesIET Power Electronics, 2023
A modular multilevel converter‐based high voltage direct current (MMC‐HVDC) system involves a large number of cascading submodules (SMs). The failure of SMs may critically degrade the system performance.
Lixia Yang   +4 more
doaj   +1 more source

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