DC fault ride-through method for full-bridge MMC-based MTDC systems [PDF]
The Journal of Engineering, 2019 The DC fault protection is one of the main issues in multi-terminal voltage source converter based high-voltage direct current (VSC–MTDC) transmission systems.
Yongjie Luo +4 more
doaj +3 more sources
Dual Channel Control With DC Fault Ride Through for MMC-Based, Isolated DC/DC Converter [PDF]
IEEE Transactions on Power Delivery, 2017 This paper presents the two-channel controller with inner current loops for dual bridge, DC/DC converter, based on modular multilevel converter (MMC) technology. The DC/DC control strategy is based on two inner fast current control loops in dq rotating frame at each of the two MMC bridges. These current controls facilitate operation through dc faults
Jovcic, Dragan, Zhang, Huibin
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Fault equivalent model for non-blocking DC fault ride-through of hybrid MMC
电力工程技术, 2023 Compared with full-bridge modular multilevel converter (MMC), the hybrid MMC composed of half bridge sub-module and full bridge sub-module has the low cost and high DC fault ride-through capability.
WANG Zeqing +5 more
doaj +2 more sources
Precharging and DC Fault Ride-Through of Hybrid MMC-Based HVDC Systems [PDF]
IEEE Transactions on Power Delivery, 2015 Compared to half-bridge based MMCs, full-bridge based systems have the advantage of blocking dc fault, but at the expense of increased power semiconductors and power losses. In view of the relationships among ac/dc voltages and currents in full-bridge based MMC with the negative voltage state, this paper provides a detailed analysis on the link between
Zeng, Rong +3 more
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Coordinate Fault Ride-Through Strategy for Connection of Offshore Wind Farms Using Voltage Source-Converter-Based High-Voltage Direct-Current Transmission under Single Polar Fault [PDF]
Sensors, 2023 In a system where wind farms are connected to the grid via a bipolar flexible DC transmission, the occurrence of a short-time fault at one of the poles results in the active power emitted by the wind farm being transmitted through the non-faulty pole ...
Huiying Zhou, Siyang Ge, Liang Qin
doaj +2 more sources
Power balancing and dc fault ride through in DC grids with dc hubs and wind farms [PDF]
IET Renewable Power Generation, 2015 Power balancing algorithm and dc fault ride through strategy in a DC grid with a DC hub are proposed in this article. Inductor‐capacitor‐inductor (LCL) dc hub is used in the DC grid to match different voltage levels and to prevent DC fault spreading.
Lin, Weixing, Jovcic, Dragan
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Simulation Test of a DC Fault Current Limiter for Fault Ride-Through Problem of Low-Voltage DC Distribution [PDF]
Energies, 2020 The low voltage direct current (LVDC) distribution networks are connected with too many kinds of loads and sources, which makes them prone to failure.
Bing Han, Yonggang Li
doaj +2 more sources
Improved hybrid modular multilevel converters with dc short-circuit fault ride-through capacity
The Journal of Engineering, 2018 Modular multilevel converter (MMC) has become a promising converter alternative for transmission voltage-source converter high-voltage direct current applications. The main issue and challenge of MMC is how to handle the dc short-circuit fault.
Yuhang Lei +3 more
doaj +2 more sources
DC Fault Ride-Through Strategy Based on Overmodulation [PDF]
IOP Conference Series: Earth and Environmental Science, 2021 Abstract The hybrid modular multilevel converter (hybrid MMC) can realize DC fault ride-through based on the capability of overmodulation and can continue to output reactive power to AC side during the fault, which can speed up the recovery of DC grid power after the fault is cleared.
M Cui, K J Li, Z J Liu, L Z Li
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Chopperless Fault Ride-Through Control for DC Microgrids [PDF]
IEEE Transactions on Smart Grid, 2021 The dc microgrid should remain connected to the ac utility grid to support the grid stability during faults. However, the bidirectional power flow between the utility grid and the dc microgrid will cause either high-voltage or low-voltage faults at the dc bus.
Yanghong Xia, Teng Long
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