Results 111 to 120 of about 377 (161)

Systematic transformation of urban cold chain networks: From cross-regional dependencies to sustainable local excellence. [PDF]

PLoS One
Wang K, Fan K, Chen Y.
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The strength indexes of the islanded LCC‐HVDC sending power system

International Transactions on Electrical Energy Systems, 2018
Facai Xing, Yuzhi Zhou, Shijia Wang, Zheng Xu   +3 more
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Study on Initialization Strategy of LCC-HVDC System

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2020
The initialization of line commutated converter based high voltage DC (LCC-HVDC) system is a difficult problem in the electromagnetic transient (EMT) simulation of large-scale AC-DC system. The traditional initialization method simulates the startup process of LCC-HVDC, which is not only time-consuming, but also difficult to match with the power flow ...
Xiaohui Ye, Yantao Zhang, Yong Tang, Yiming Lu, Guangxian Lyu, Jian Du   +5 more
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Modelling and Control of Multiterminal LCC HVDC

2018 IEEE PES/IAS PowerAfrica, 2018
Recent advances in the development and availability of multiple manufacturer for power electronics industries have made multiterminal-High Voltage Direct Current (HVDC) links possible and feasible. The multiterminal HVDC (MTDC) configuration is commonly referred to as ‘HVDC Grids’.
Oluwafemi E. Oni, Andrew G. Swanson, Rudiren Pillay Carpanen   +2 more
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Modeling of LCC-HVDC systems using dynamic phasors

2015 IEEE Power & Energy Society General Meeting, 2014
This paper presents an average-value model of a line commutated converter-based HVDC system using dynamic phasors. The model represents the low-frequency dynamics of the converter and its ac and dc systems, and has lower computational requirements than a conventional electromagnetic transient (EMT) switching model. The developed dynamic-phasor model is
M. Daryabak, S. Filizadeh, J. Jatskevich, A. Davoudi, M. Saeedifard, V. K. Sood, J. A. Martinez, D. Aliprantis, J. Cano, A. Mehrizi-Sani   +9 more
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An Accurate Small Signal Dynamic Model for LCC-HVDC

IEEE Transactions on Applied Superconductivity, 2021
This paper develops an accurate small signal model for line commutated converter based HVDC (LCC-HVDC). The overall process of the model establishment is demonstrated from five parts: AC system, DC system, control system, phase-locked loop (PLL) and the converter.
Yuqing Dong, Junpeng Ma, Shunliang Wang, Tianqi Liu, Xiang Chen, He Huang   +5 more
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Frequency Scan Based Stability Analysis of an LCC-HVdc System

2019 IEEE Canadian Conference of Electrical and Computer Engineering (CCECE), 2019
Frequency scanning is a method for extracting the small-signal model of a power electronic system (PES) by injecting a wide-band signal in its time-domain simulation at steady state. This paper presents the stability analysis of the interactions between a Line Commutated Converter HVdc system (LCC-HVdc) and its ac grid using a frequency scanning ...
M. Shirinzad, M. K. Das, Ani M. Gole
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Electromagnetic modeling of LCC-HVDC

2020
This chapter describes the electromagnetic transient (EMT) modeling of two-terminal line commutated converter-based high-voltage direct current (LCC-HVDC) transmission systems. The scope of the description is confined to modeling for the computation of EMTs associated with HVDC transmission systems using the widely spread EMT program-type method.
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A Coordinated Marginal Current Control Method for LCC-HVDC

IEEE Transactions on Power Systems, 2019
Line-commutated-converter-based HVdc (LCC-HVdc) is extensively used in modern power systems. Most of the LCC-HVdcs are implemented with the control strategy termed marginal current control method (MCCM), while their operation is sensitive to disturbance from the ac part of the system.
Jian Xu, Tiankai Lan, Siyang Liao, Yuanzhang Sun, Deping Ke, Xiong Li, Jun Yang, Xiaotao Peng, Liping Sima   +8 more
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Decentralized Supplementary Control of Multiple LCC-HVDC Links

IEEE Transactions on Power Systems, 2016
This paper presents a decentralized wide-area coordinated supplementary control of multiple line-commutated converter (LCC)-HVDC links to 1) prevent interactions among the HVDC links and 2) enhance the damping of the inter-area oscillatory modes. The proposed approach is based on the sparsity-promoting optimal control. The main features of the proposed
Sahar Pirooz Azad, Joshua Adam Taylor, Reza Iravani   +2 more
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