Modular multilevel converters: Recent achievements and challenges
The modular multilevel converter (MMC) is currently one of the power converter topologies
which has attracted more research and development worldwide. Its features, such as high …
which has attracted more research and development worldwide. Its features, such as high …
Classification and dynamic assessment of droop-based grid-forming control schemes: Application in HVDC systems
This paper introduces a novel classification for droop-based control strategies towards
emerging interest of utilizing grid-forming control schemes in high voltage direct current …
emerging interest of utilizing grid-forming control schemes in high voltage direct current …
Grid-forming control to achieve a 100% power electronics interfaced power transmission systems
T Qoria - 2020 - pastel.hal.science
The rapid development of intermittent renewable generation and HVDC links yields an
important increase of the penetration rate of power electronic converters in the transmission …
important increase of the penetration rate of power electronic converters in the transmission …
The role of the internal energy in MMCs operating in grid-forming mode
With an increasing number of renewable energy resources being integrated into the power
system through power electronics, conventional power plants based on large synchronous …
system through power electronics, conventional power plants based on large synchronous …
Load balancing of a modular multilevel grid-interface converter for transformer-less large-scale wireless electric vehicle charging infrastructure
This article analyzes the requirements for load balancing of a new transformer-less grid-
interface topology for large-scale electric vehicle (EV) charging infrastructures. The …
interface topology for large-scale electric vehicle (EV) charging infrastructures. The …
On fault-ride-through performance in MMC-HVDC applications controlled as a virtual synchronous machine
Due to decreasing inertia within the German transmission grid, HVdc transmission links are
recently planned as a grid-forming asset in order to contribute to the overall system stability …
recently planned as a grid-forming asset in order to contribute to the overall system stability …
Capacitor Voltage Feedforward-based Voltage Loop Control for Grid-forming Modular Multilevel Converters Under Wide-range of Grid Strength
An efficient closed-loop voltage tracking control (VTC) for a grid-forming-based converter is
required for precise voltage regulation. However, few papers designed a VTC exclusively for …
required for precise voltage regulation. However, few papers designed a VTC exclusively for …
Negative sequence control for virtual synchronous machines under unbalanced conditions
In this article, five strategies for controlling the negative sequence currents of a virtual
synchronous machine (VSM) under unbalanced conditions are comparatively assessed …
synchronous machine (VSM) under unbalanced conditions are comparatively assessed …
Nonlinear Controller for MMC-HVdc Operating in Grid-Forming Mode
The development of the modular multilevel converter (MMC) enabled the efficient creation of
high-power high-voltage direct current (HVdc) transmission systems. As a result, MMC-HVdc …
high-power high-voltage direct current (HVdc) transmission systems. As a result, MMC-HVdc …
Optimal sha** of the MMC circulating currents for preventing AC-side power oscillations from propagating into HVdc grids
A constrained optimization problem based on the Lagrange multipliers method is formulated
to derive the circulating current references of modular multilevel converters (MMCs) directly …
to derive the circulating current references of modular multilevel converters (MMCs) directly …