Results 11 to 20 of about 308 (120)

Research on DC Protection Strategy in Multi-Terminal Hybrid HVDC System

Engineering, 2021
Multi-terminal hybrid high-voltage direct current (HVDC) systems have been developed quickly in recent years in power transmission area. However, for voltage-source converter (VSC) stations in hybrid HVDC systems, no direct current (DC) filters are ...
Yuping Zheng, Jiawei He, Bin Li, Tonghua Wu, Wei Dai, Ye Li   +5 more
doaj   +1 more source

Pilot protection scheme for transmission line of a hybrid HVDC system based on polarity characteristics of current and voltage fault components

The Journal of Engineering, 2019
A hybrid high-voltage direct current (HVDC) system comprises a line commutated converter (LCC) at the rectifier side and a voltage source converter (VSC) at the inverter side, combining advantages of both LCC and VSC systems.
Yanting Wang, Baohui Zhang, Baohui Zhang, Shaojie Cheng   +3 more
doaj   +1 more source

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, Hua Zhou, Zheng Xu, Shijia Wang, Yuzhe Xu   +4 more
doaj   +1 more source

A Power Allocation Strategy for DC Line Fault in Serial Hybrid LCC-MMC HVDC System

IEEE Access, 2022
The serial hybrid line commutated converter-modular multilevel converter (LCC-MMC) high voltage direct current (HVDC) system has structural features that cause the inverter side three MMCs to form a closed-loop after a DC line fault.
Xiaopeng Li, Yufei Teng, Lei Liu, Gui Fang   +3 more
doaj   +1 more source

The LCC type DC grids forming method and fault ride-through strategy based on fault current limiters

International Journal of Electrical Power & Energy Systems
With the integration of a large number of new energy sources into the power grid, the degree of multi power center continues to deepen, and multi-terminal DC transmission is receiving increasing attention.
Changlin Liu, Baohong Li, Yingmin Zhang, Qin Jiang, Tianqi Liu   +4 more
doaj   +1 more source

Generic Analysis Framework for Modular Multilevel Converter HVDC with Multi-Infeed Line-Commutated Converter HVDC System

Energies, 2021
This paper proposes a generic analysis framework for a grid supporting modular multilevel converter (MMC)-high voltage DC (HVDC) in a multi-infeed of line commutated converter (LCC) and MMC (MILM) system. MMC-HVDC can support the grid by compensating for
Sehyun Kim, Kyeon Hur, Jongseo Na, Jongsu Yoon, Heejin Kim   +4 more
doaj   +1 more source

Application research on pilot protection method for multi‐terminal hybrid line‐commutated converter/modular multilever converter‐based high voltage DC system

IET Generation, Transmission & Distribution, 2021
The multi‐terminal hybrid line commutated converter (LCC)/modular multilevel converter (MMC)‐based high voltage dc (HVDC) has been applied to solve the simultaneous commutation failure problem in East China.
Chenhao Zhang, Guobing Song, Lishuai Yin, Ruidong Xu, Yang Li, Liming Yang, Xinzhou Dong   +6 more
doaj   +1 more source

A Single-Phase AC-AC Power Electronic Transformer Without Bulky Energy Storage Elements

Energies
Compared with the line-frequency transformer (LFT), the emerging power electronic transformers (PETs) have gained wide concerns due to the significant merits of higher power density, higher reliability, more flexibility, and multiple functions.
Hui Wang, Shuyang Xie, Liang Yuan
doaj   +1 more source

Updatable Closed‐Form Evaluation of Arbitrarily Complex Multiport Network Connections

Advanced Electronic Materials, EarlyView.
The inverse design of electrically large wave devices often uses reduced‐order multiport models with discrete optimization, requiring many evaluations of complex interconnections between subsystems that differ only in a few blocks. This paper introduces a closed‐form framework enabling efficient Woodbury low‐rank updates of related, previous ...
Hugo Prod'homme, Philipp del Hougne
wiley   +1 more source

Research on the Power Coordinate Control Strategy between a CLCC-HVDC and a VSC-HVDC during the AC Fault Period

Energies
The underlying cause of commutation failures in traditional line-commutated converter (LCC) high-voltage direct-current (HVDC) transmission technology lies in the sensitivity of the thyristor devices, which are prone to turning off, thereby restoring the
Jingbo Zhao, Ke Xu, Wenbo Li
doaj   +1 more source