Results 171 to 180 of about 21,810 (200)
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PES T&D 2012, 2012
This presentation will provide an introduction into the main components which make up conventional Line Commutated Converter (LCC) HVDC, with ratings ranging from 75MW at the lower end, all the way up to 800 kV. This will include all of the HVDC configurations, including Back to Back, Underground/Submarine Cable, Overhead Line, covering the main ...
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This presentation will provide an introduction into the main components which make up conventional Line Commutated Converter (LCC) HVDC, with ratings ranging from 75MW at the lower end, all the way up to 800 kV. This will include all of the HVDC configurations, including Back to Back, Underground/Submarine Cable, Overhead Line, covering the main ...
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Stability mechanism analysis of HVDC control system for power system restoration using HVDC
2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011This paper study the power system restoration procedure with external power supplies through HVDC transmission channel. The simplified models of the transmission system under different control modes are established and their stability margin are analyzed by root locus diagram. In consideration of the influence of the short circuit capacity and rotating
Hongtao Wang, Chengming He, Lei Fu
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HVDC life extension for Nelson River HVDC system
2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309), 2003The Nelson River HVDC transmission system in Manitoba, Canada, is described with reference to equipment upgrades, equipment replacements and process improvements completed to meet safety, environmental and reliability performance goals. Today's operational environment demands increased HVDC system performance, which in many cases exceeds original ...
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Research on Power Modulation Strategy for MMC-HVDC and LCC-HVDC in Parallel HVDC System
2019 IEEE 3rd Conference on Energy Internet and Energy System Integration (EI2), 2019Due to the difference between MMC-HVDC and LCC-HVDC control characteristics and the mutual influence of parallel connection, its power modulation strategy is different from that of LCC-HVDC. Coordinated control strategy of parallel system of MMC-HVDC and LCC-HVDC is analyzed.
Yihua Zhu +5 more
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Multiterminal HVDC Power Systems
IEEE Transactions on Power Apparatus and Systems, 1980Papers published over a 17 year period, on the concept of extending 2-terminal HVdc transmission to multiterminal systems, are reviewed. In classifying the contributions, the design and performance expectations are discussed and the prospects for applications are evaluated. Reference is also made to the implications of dc interrupting switches.
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Proceedings of the IEEE, 2017
The use of direct current (dc) power networks, either at high voltage or at medium voltage, is being increasingly seen in modern smart grids. This is due to the flexible control possible with dc and its ability to transmit and distribute power under circumstances where alternating current (ac) networks are either unable to, or less economic. This paper
Mike Barnes +3 more
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The use of direct current (dc) power networks, either at high voltage or at medium voltage, is being increasingly seen in modern smart grids. This is due to the flexible control possible with dc and its ability to transmit and distribute power under circumstances where alternating current (ac) networks are either unable to, or less economic. This paper
Mike Barnes +3 more
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IEEE Transactions on Power Apparatus and Systems, 1970
Most commercial HVDC plants now operating are equipped with the same type of control system, the so-called individual phase control system. This system is simple and the operating experience is excellent. However, the requirements for future installations will sometimes be difficult to fulfill with the existing control system. This may be the case when
Ake Ekstrom, Gote Liss
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Most commercial HVDC plants now operating are equipped with the same type of control system, the so-called individual phase control system. This system is simple and the operating experience is excellent. However, the requirements for future installations will sometimes be difficult to fulfill with the existing control system. This may be the case when
Ake Ekstrom, Gote Liss
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Cockcroft-Walton based HVDC system
2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL), 2017An HVDC system based on a Cockcroft-Walton (CW-HVDC) topology is presented and a novel strategy is proposed to analyze and control the converter. In the connection to the grid the CW-HVDC uses a 3×2 matrix converter. The CW-HVDC voltage state-space vectors are derived and used to control the AC currents, guaranteeing nearly unitary power factor in the ...
Joao Cunha +2 more
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1998
This chapter discusses HVDC transmission systems that can be configured in many ways to take into account cost, flexibility and operational requirements.
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This chapter discusses HVDC transmission systems that can be configured in many ways to take into account cost, flexibility and operational requirements.
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Nonlinear dynamics in HVDC systems
IEEE Transactions on Power Delivery, 1999Voltage instability in AC power systems has been widely studied from a nonlinear dynamical system perspective. In contrast, this approach for HVDC systems is of recent origin and rudimentary, therefore much basic work in this area remains to be developed.
null Denis Lee Hau Aik, G. Andersson
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