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Journal Article 6

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AC-DC power-flow 1

Active injection 1

Broadband oscillation 1

Future power system 1

HVAC 1

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Multi-terminal hybrid HVDC system 1

Newton-Raphson method 1

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Single-ended protection 1

Transient information 1

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VSC 1

high voltage direct current 1

high voltage direct current (HVDC) control strategy 1

offshore wind farm 1

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Development and advances in modular multilevel converter based HVDC projects in China

Frontiers of Engineering Management Pages 183-189 doi: 10.1007/s42524-022-0248-7

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Keywords： high voltage direct current power converter power systems renewable energy ultra-high voltage

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Corrigendum to “Research on DC protection strategy in multi-terminal hybrid HVDC System” [Engineering Corrigendum

Yuping Zheng, Jiawei He, Bin Li, Tonghua Wu, Wei Dai, Ye Li

Engineering 2022, Volume 10, Issue 3, Pages 183-183 doi: 10.1016/j.eng.2022.02.006

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Large-Scale Renewable Energy Transmission by HVDC: Challenges and Proposals Review

Weisheng Wang, Guanghui Li, Jianbo Guo

Engineering 2022, Volume 19, Issue 12, Pages 252-267 doi: 10.1016/j.eng.2022.04.017

Abstract:

Renewable energy transmission by high-voltage direct current (HVDC) has attracted increasing attentionHigh-penetration power electronic systems have gradually formed at the sending end of HVDC transmission

Keywords： Broadband oscillation Future power system HVDC transmission Renewable energy generation Transient over-voltage

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

Yuping Zheng, Jiawei He, Bin Li, Tonghua Wu, Wei Dai, Ye Li

Engineering 2021, Volume 7, Issue 8, Pages 1064-1075 doi: 10.1016/j.eng.2021.05.002

Abstract:

Multi-terminal hybrid high-voltage direct current (HVDC) systems have been developed quickly in recentHowever, for voltage-source converter (VSC) stations in hybrid HVDC systems, no direct current (DC) filtersat the line end is absent, and the single-ended protections used in line commutated converter based HVDC(LCC-HVDC) systems or VSC-HVDC systems cannot distinguish the fault line in multi-terminal hybrid HVDCCompared with the single-ended protections used in LCC-HVDC and VSC-HVDC systems, the proposed protection

Keywords： Multi-terminal hybrid HVDC system Single-ended protection Transient information Active injection

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The transmission technologies of large-scale offshore wind farms

Zhu Yifei,Tao Tieling

Strategic Study of CAE 2010, Volume 12, Issue 11, Pages 89-92

Abstract: is presented for three kinds of transmission technologies: HVAC(high voltnge alternating current), HVDC(high voltnge direct current) based on line commutated converter(LCC),HVDC based on voltage source converter

Keywords： offshore wind farm HVAC HVDC LCC VSC

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Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence

Shagufta KHAN,Suman BHOWMICK

Frontiers in Energy 2015, Volume 9, Issue 4, Pages 399-412 doi: 10.1007/s11708-015-0374-6

Abstract: This paper demonstrates the convergence of the integrated AC-DC power-flow algorithm as affected by the selection of different base values for the DC quantities and adoption of different control strategies for the DC link. For power-flow modeling of integrated AC-DC systems, the base values of the various DC quantities can be defined in several ways, giving rise to different sets of per-unit system equations. It is observed that different per-unit system models affect the convergence of the power-flow algorithm differently. In a similar manner, the control strategy adopted for the DC link also affects the power-flow convergence. The sequential method is used to solve the DC variables in the Newton Raphson (NR) power flow model, where AC and DC systems are solved separately and are coupled by injecting an equivalent amount of real and reactive power at the terminal AC buses. Now, for a majority of the possible control strategies, the equivalent real and reactive power injections at the concerned buses can be computed a-priori and are independent of the NR iterative loop. However, for a few of the control strategies, the equivalent reactive power injections cannot be computed a-priori and need to be computed in every NR iteration. This affects the performance of the iterative process. Two different per-unit system models and six typical control strategies are taken into consideration. This is validated by numerous case studies conducted on the IEEE 118-bus and 300-bus test systems.

Keywords： AC-DC power-flow Newton-Raphson method high voltage direct current (HVDC) control strategy