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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
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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
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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
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Energy Reports, 2020 As the penetration of wind power increases, the fault ride through requirements imposed by grid code is important in grid connected wind systems. The wind systems should remain connected to the grid during grid faults satisfying the grid code which ...
C.R. Raghavendran +2 more
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DC fault ride-through method for full-bridge MMC-based MTDC systems
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
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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.
Yang-hong Xia, Teng Long
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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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Zhongguo dianli, 2021 The DC fault has become one of the most serious obstacles for the development of DC system because of its wide impact range and large fault current.
Shiyuan FAN +5 more
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Energy Reports, 2021 The hybrid HVDC system based on line commutated converter and modular multilevel converter is a feasible method to address the common commutation failure at the receiving end of conventional HVDC systems. At present, project Gezhouba–Shanghai in China is
Liangliang Hao +4 more
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DC fault ride through of multilevel converters [PDF]
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016 Modular Multilevel Converters (MMC) can provide significant advantages for power transmission applications, however there are remaining challenges trading off DC fault response, losses and controllability. Alternative multilevel converter topologies using combinations of full bridge and half bridge submodules or series switches allow for competitive ...
Geraint Chaffey +4 more
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