Results 31 to 40 of about 2,361 (200)
Transient overvoltage on overhead metal return lines of ±500 kV MMC-HVDC grid
The Journal of Engineering, 2018 The ±500 kV half-bridge modular multilevel converter-high-voltage DC (MMC-HVDC) grid project with overhead transmission line is under construction in China at present.
Huiwen He +4 more
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The efficacy of recycled concrete aggregate for removal phosphorus in synthetic wastewater with different pH value [PDF]
, 2020 Phosphorus (P) is the main nutrient element for plant growth in the natural water system. However, unnecessary phosphorus loads in water bodies from industrial, agricultural and household wastes may cause the overgrowth of aquatic plants or algae which ...
Abd Roni, Norwardatun +3 more
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Sukkur IBA Journal of Emerging Technologies, 2021 The research paper presents the control strategy to reduce THD (Total Harmonic Distortions) losses by the implementation of the Nearest Level Modulation control technique in a Modular Multilevel Converter. Modular Multilevel Converter is found one of the
engr Baqir Ali Shah +4 more
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Interlink hybrid DC circuit breaker [PDF]
, 2018 —To protect HVDC grids from DC faults, the concept of a hybrid DC circuit breaker is widely accepted due to its low conduction losses and fast interruption speed.
Li, Chuanyue, Liang, Jun, Wang, Sheng
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Research on fault diagnosis for MMC-HVDC Systems [PDF]
Protection and Control of Modern Power Systems, 2016 With the development of flexible HVDC technology, the fault diagnosis of MMC-HVDC becomes a new research direction. Based on the fault diagnosis theory, this paper proposes a robust fault diagnosis method to study the fault diagnosis problem of MMC-HVDC systems.
Yao, Zhiqing +3 more
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Modelling of MMC-HVDC Systems – An Overview
Energy Procedia, 2015 AbstractModular Multilevel Converters (MMC) are presently the converter topology of choice for Voltage Source Converter High Voltage DC (VSC-HVDC) transmission schemes due to their very high efficiency. Accurate models of these complex MMC-HVDC systems are therefore required for research and development.
Beddard, A., Barnes, M.
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A novel MMC control scheme to increase the DC voltage in HVDC transmission systems [PDF]
, 2017 This research investigates third harmonic injection applied to a modular multilevel converter (MMC) to generate a higher DC voltage. This is achieved using a proposed novel control scheme that activates existing submodules (SMs) in the converter arms ...
Fletcher, John, Li, Rui
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Circulating Current Reduction in MMC-HVDC System Using Average Model [PDF]
Applied Sciences, 2019 Modular multilevel converters (MMCs) are quickly emerging as a suitable technology for a voltage-source converter-based high-voltage direct-current (VSC-HVDC) transmission systems due to its numerous advantages as reported in literature. However, for a large DC-network, MMCs require large numbers of sub-modules (SMs) and switches, which makes its ...
Kamran Hafeez +3 more
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IEEE Access, 2023 Modular multilevel converter (MMC)-based high voltage direct current (HVDC) transmission networks integrate remotely located distributed renewable energy resources (RER). The intermittent nature of RER and symmetrical and asymmetrical AC-side low-voltage
Md Ismail Hossain +4 more
doaj +1 more source
Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability [PDF]
, 2014 One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed.
Aboushady, A.A., Ahmed, K.H.
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