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 …
On converter fault tolerance in MMC-HVDC systems: A comprehensive survey
Since they were first proposed, modular multilevel converters have been strongly studied in
the literature. Due to their high component count, some concerns regarding their reliability …
the literature. Due to their high component count, some concerns regarding their reliability …
A T-type switched-capacitor multilevel inverter with low voltage stress and self-balancing
This paper proposes a novel T-type multilevel inverter (MLI) based on the switched-
capacitor technique. The proposed inverter not only achieves that the maximum voltage …
capacitor technique. The proposed inverter not only achieves that the maximum voltage …
Feasibility and reliability analysis of LCC DC grids and LCC/VSC hybrid DC grids
Power system interconnections using high-voltage direct-current (HVDC) technologies
between different areas can be an effective solution to enhance system efficiency and …
between different areas can be an effective solution to enhance system efficiency and …
Characteristic investigation and overvoltage suppression of MMC-HVDC integrated offshore wind farms under onshore valve-side SPG fault
The valve-side ground fault in the converter station of modular multilevel converter based
high voltage direct current (MMC-HVDC) is a serious threat to the security of power systems …
high voltage direct current (MMC-HVDC) is a serious threat to the security of power systems …
Parameter design oriented analysis of the current control stability of the weak-grid-tied VSC
This paper studies the dynamic behaviors of weak-grid-tied VSCs with simplified transfer
functions, which provides an accurate stability analysis and useful indications for tuning …
functions, which provides an accurate stability analysis and useful indications for tuning …
DC fault detection in meshed MTDC systems based on transient average value of current
It is of great significance for a voltage source converter (VSC)-based multiterminal dc (MTdc)
grid to isolate the dc fault lines within several milliseconds after dc fault. Existing protection …
grid to isolate the dc fault lines within several milliseconds after dc fault. Existing protection …
Power reversal strategies for hybrid LCC/MMC HVDC systems
Power reversal control strategies for different types of hybrid line-commutated-converter
(LCC)/modular multi-level converter (MMC) based high-voltage direct-current (HVDC) …
(LCC)/modular multi-level converter (MMC) based high-voltage direct-current (HVDC) …
[HTML][HTML] Multi-target fault ride-through strategy for transformerless MMCs under asymmetric grounding faults in AC/DC hybrid distribution networks
In AC/DC hybrid distribution networks (HDNs), when asymmetric grounding faults occur,
transformerless multiterminal modular multilevel converters (MMCs) should achieve three …
transformerless multiterminal modular multilevel converters (MMCs) should achieve three …
Efficient estimation and characteristic analysis of short-circuit currents for MMC-MTDC grids
Short-circuit current calculation and its characteristic analysis are the foundation of selecting
circuit breakers and designing protection systems. First, a companion circuit-based method …
circuit breakers and designing protection systems. First, a companion circuit-based method …