Results 31 to 40 of about 2,067 (225)

High voltage direct current (HVDC) transmission: Future expectation for Pakistan

CSEE Journal of Power and Energy Systems, 2019
An HVDC transmission system for bulk power transfer over longer distance offers numerous advantages over an alternating current (AC) transmission system, such as direct integration of networks operating at different frequencies, comparatively low line ...
Kamran Hafeez, Shahid A. Khan
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Protection of Multi-Terminal VSC HVDC Hybrid Transmission Line

, 2023
This paper presents a fast fault detection scheme for a hybrid line in a multi-terminal (MT) voltage source converter (VSC) high voltage DC (HVDC) system. The proposed method is based on the primary and secondary protection scheme.
Ma, Kaiqi, Bak, Claus Leth, Farkhani, Jalal Sahebkar; id_orcid, Chen, Z., Bak, C.L., Chen, Zhe; id_orcid, Celik, Ozgur, Farkhani, J. Sahebkar, Ma, K., Celik, Ö.   +9 more
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Single-end Protection Scheme Based on Transient Power Waveshape for Hybrid HVDC Transmission Lines

Journal of Modern Power Systems and Clean Energy, 2023
The recent in-depth development of hybrid high-voltage direct current (HVDC) transmission systems poses looming adaptability challenges to protection.
Feiyang Dai, Zexin Zhou, Xingguo Wang
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
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Study on surface electric field and ground nominal electric field of HVDC transimission line on slope terrain

The Journal of Engineering, 2019
In order to study the fast calculation method of a surface electric field of the arbitrary-quantity bundled conductor and a ground nominal electric field of the HVDC transmission line on slope terrain.
Chenguang Gao, Yuanqing Liu, Jiangtao Zhao, Xirun Zhang, Wenyu Li, Hui Han, Jingchen Zhang   +6 more
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Recent advances in High-Voltage direct-current power transmission systems

, 2006
The ever increasing progress of high-voltage high-power fully-controlled semiconductor technology continues to have a significant impact on the development of advanced power electronic apparatus used to support optimised operations and efficient ...
Nikolas Flourentzou, Demetriades, G.D., Vassilios G. Agelidis, Georgios D. Demetriades, Flourentzou, N., Agelidis, V.G.   +5 more
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HVDC technologies in electric power transmission: International practices and development pathways in Kazakhstan [PDF]

E3S Web of Conferences
High-voltage direct current (HVDC) transmission lines represent a key component of modern energy infrastructure, providing efficient longdistance electricity transmission and integration of renewable energy sources.
Akhatov Daulet, Zhautikov Bakhyt, Sivyakova Galina, Nikulshin Alexandr, Druzhinin Valery, Kamarova Saule, Kuntush Yelena, Siverskaya Tatyana   +7 more
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Research on electromagnetic environment of HVDC transmission line under sand and dust conditions

Energy Reports, 2022
To study the impact of dust weather on the electromagnetic environment of the HVDC transmission line, this paper first analyzes the changes of transmission line corona field intensity under different dust conditions, and puts forward the prediction ...
Yong Qian, Qingming Xiao, Rui Ma, Jie Pan, Li Han   +4 more
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Practical calculation of SCR of LCC-HVDC considering the role of VSC-HVDC

Zhejiang dianli, 2023
The accurate quantification of transmission limit and grid strength of the multi-infeed LCC-HVDC （line-commutated converter technology-based high-voltage DC） and VSC-HVDC （voltage source converter technology-based high-voltage DC） systems has become one ...
YANG Xiaolei, HAN Zhongjie, YE Lin, JIANG Junxian, WANG Yixin, WANG Guanzhong   +5 more
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Research and simulation of line overvoltage in HVDC transmission system

IOP Conference Series: Earth and Environmental Science, 2021
Abstract The distribution of heavy load area and resource area is seriously unbalanced in China. HVDC transmission system project with long-distance and large capacity transmission characteristics has practical significance in today’s social development. Firstly, this paper discusses the basic knowledge of over-voltage in DC transmission
Zifa Liu, Xingya Wen
openaire   +1 more source