Results 71 to 80 of about 2,361 (200)
A Secure Fault Identification Approach for MMC‐HVDC Network
International Transactions on Electrical Energy SystemsIn high voltage direct current (HVDC) systems, the occurrence of short circuits results in a rapid rise in line current, adversely affecting the interconnected alternating current (AC) grid. Particularly in voltage source‐based multimodular converter (MMC) HVDC networks, such transients pose a significant threat to power converter units.
Kiran Rana +3 more
openaire +2 more sources
Equivalent Test Method for Fault Ride‐Through of Integrated Energy‐consuming MMC Modules
IET Power Electronics, Volume 19, Issue 1, January/December 2026.This paper proposes an equivalent assessment index covering the entire fault ride‐through process, taking the integrated energy‐consuming MMC valve as the research object, and solves the problem of the lack of assessment index for the fault ride‐through equivalent test.
Ying Li +7 more
wiley +1 more source
Journal of Modern Power Systems and Clean EnergyIn recent years, high-frequency resonance (HFR) events occurred in several modular multilevel converter based high-voltage direct current (MMC-HVDC) projects. The time delay of an MMC-HVDC system is the critical factor that induces HFR.
Juanjuan Wang +5 more
doaj +1 more source
Novel fault current-limiting scheme for MMC-based flexible HVDC system
The Journal of Engineering, 2019 Currently, the flexible direct current transmission technique becomes a research focus around the world, and be applied in power engineering projects gradually.
Yueyang Ma +4 more
doaj +1 more source
Research on MMC-HVDC multi-objective model predictive control strategy under asymmetric faults
Energy Reports, 2020 When an asymmetric fault occurs on the AC side of the MMC-HVDC system, a large number of non-characteristic harmonics will be generated on both sides of the system, which will affect the operation of the system.
Jianpo Zhang, Ziwei Hu, Xincheng Tian
doaj +1 more source
Flexible HVDC transmission systems small signal modelling: a case study on CIGRE Test MT-HVDC grid [PDF]
, 2017 Future Flexible HVDC Transmission Systems will consist of several active and passive infrastructures including DC Power Flow Controller (DC-PFC) device. The addition of the DC-PFC to the future Multi-Terminal HVDC (MT-HVDC) grids arises some key concerns
Candela García, José Ignacio +4 more
core +1 more source
IET Power Electronics, Volume 19, Issue 1, January/December 2026.This paper proposes a non‐contact method for measuring the turn‐off time of insulated‐gate bipolar transistor (IGBT) devices in modular multilevel converters (MMC) submodules, using the decay of load‐side common‐mode current. The technique leverages existing current‐sensing infrastructure and avoids intrusive modifications, enabling real‐time ...
Jiyun Liu +7 more
wiley +1 more source
Sequence current controllability analysis of an offshore MMC-HVDC during asymmetrical faults [PDF]
, 2019 This paper analyzes the sequence current controllability of an offshore MMC-HVDC during asymmetrical faults. It is found that the separate limitation of the output positive- and negative-sequence current of the MMC-HVDC during asymmetrical faults may ...
Hjerrild, Jesper +4 more
core +3 more sources
IET Power Electronics, Volume 19, Issue 1, January/December 2026.The arm‐multiplexing modular multilevel converter (AM‐MMC) is a lightweight, high‐power‐density topology whose conventional modulation strategies require large circulating currents to maintain energy balance. This paper establishes a time‐domain analytical model of the AM‐MMC energy‐balance mechanism and proposes an optimised independent arm modulation
Zhen Zhang +5 more
wiley +1 more source
Review of HVDC systems for enhancing resilience after extreme natural events
The Journal of Engineering, 2021 Compared with AC systems, HVDC systems are more flexible and potentially contribute to enhancing system resilience. Currently, three types of HVDC technologies, LCC‐HVDC (Line‐commutated Current‐sourced Converters, LCC), VSC‐HVDC (Voltage Sourced ...
Chuhang Luo, Liang Liang, Xiaoyang Bai
doaj +1 more source