Results 41 to 50 of about 2,361 (200)
Three-way Subsynchronous Torsional Interactions Between LCC HVDC, MMC HVDC and a Thermal Generator
Journal of Modern Power Systems and Clean Energy, 2023 This paper performs a study on three-way subsynchronous torsional interactions (SSTI) between a hybrid dual-in-feed high-voltage direct current (HVDC) system and a nuclear generator. The test case is based on the French IFA2000 line commutated converter (
Stefan Kovacevic +3 more
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Fault response comparison of LCC–MMC hybrid topologies and conventional HVDC topology
The Journal of Engineering, 2018 The modular multilevel converter (MMC) can be used to upgrade conventional line commutated converter-based HVDC systems (LCC-HVDC), construct the hybrid topologies of LCC and MMC to acquire better fault responses.
Boliang Lou +4 more
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High‐frequency resonance in HVDC and wind systems: Root causes and solutions
IET Renewable Power Generation, 2023 This paper presents methods to model and solve high‐frequency resonance problems in HVDC and wind power systems. Control and digital PWM delays are identified as a common root cause for such resonances. A systematic method to include such delays in small‐
Jian Sun +2 more
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Modular multilevel converter with modified half-bridge submodule and arm filter for dc transmission systems with DC fault blocking capability [PDF]
, 2018 Although a modular multilevel converter (MMC) is universally accepted as a suitable converter topology for the high voltage dc transmission systems, its dc fault ride performance requires substantial improvement in order to be used in critical ...
Abdelsalam, Ibrahim A. +3 more
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Energies, 2018 A method for electromechanical modeling of line commutated converter (LCC)-modular multilevel converter (MMC)-based hybrid multi-terminal High Voltage Direct Current Transmission (HVDC) systems for large-scale power system transient stability study is ...
Liang Xiao +4 more
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MMC‐HVDC AC side line protection based on positive sequence fault component current ratio
IET Generation, Transmission & Distribution, 2023 The high‐voltage direct current (HVDC) transmission based on modular multilevel converter shows the weak feed characteristic of limited fault current amplitude when connected to the traditional AC power grid, which leads to the risk of sensitivity ...
Hanqing Huang, Zengping Wang
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Coordination Control Strategy for Compound Fault of MMC-HVDC [PDF]
MATEC Web of Conferences, 2016 Single-line to ground fault of DC side and sub-module fault are typical faults of MMC-HVDC. When each of the above faults occurs, the system will give a signal for circuit-breaker releasing, this will result in interruption of power delivery, the stability of the system is greatly reduced. When these two faults occur simultaneously, research on control
Zhang Ming Guang +3 more
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A novel current differential protection for MMC-HVDC lines
Journal of Physics: Conference Series, 2021 Abstract The present current differential protection for MMC-HVDC transmission lines has absolute selectivity and powerful ability to withstand high transition resistance, while it is easily affected by distributed capacitive current and data synchronization error.
Yu Qin +4 more
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Small-Signal stability analysis of MMC-HVDC system with saturated transformer
International Journal of Electrical Power & Energy SystemsTransformer saturation has a significant impact on the stability of HVDC systems. While traditional research has primarily focused on LCC-HVDC systems, studies on MMC systems remain limited. Given the anticipated dominance of MMC technology in the future,
Hanwen Wang +6 more
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Accelerated switching function model of hybrid MMCs for HVDC system simulation [PDF]
, 2017 An accelerated switching function model (SFM) of the hybrid modular multilevel converter comprising both full-bridge (FB) and half-bridge (HB) submodules (SMs) in each arm is presented for HVDC system simulation, where auxiliary circuits are adopted to ...
Guo, Deyang, Li, Rui, Xu, Lie
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