Results 171 to 180 of about 8,930,858 (215)

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), 2011
This 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), 2003
The 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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HVDC system development

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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Earthing requirements for HVDC systems

2015 50th International Universities Power Engineering Conference (UPEC), 2015
Following the recent developments in the field of power electronic valves, High Voltage Direct Current (HVDC) systems have become more attractive in power systems, and are widely recognised as a suitable tool for future power systems, especially in bulk power transmission over long distances.
H Hamzehbahmani, H Griffiths, A Haddad, D Guo   +3 more
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A review on HVDC protection system

2017 IEEE International Conference on Circuits and Systems (ICCS), 2017
This paper proposes the overview of UHVDC transmission system, which is widely used for long distance and large capacity transmission. Since the long distance of DC lines are perplexing, which fetches the environment. The fault in HVDC system that has uppermost liability in sense. A bipolar system that can perform the polarities on both poles.
C. Poongothai, K. Gayathri
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A Refined HVDC Control System

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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Experimental Investigation for HVDC System

2020
In recent years, the wide array of digital devices is available for developing drive system. Unlike the analog controllers, the digital controllers allow implementation of sophisticated operating algorithms, offering significant technical advantages, thanks to their ability of fast processing of vast data, high operational flexibility, and ease of ...
Nagwa F. Ibrahim, Sobhy S. Dessouky
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Nonlinear dynamics in HVDC systems

IEEE Transactions on Power Delivery, 1999
Voltage 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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Modeling and Control of HVDC Systems

2019
This chapter gives a brief overview of modeling and control of high voltage DC (HVDC) systems. First, different configurations of HVDC transmission systems are mentioned, which is followed by the state-space averaged modeling of line-commutated converter (LCC) HVDC systems and their control modes.
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HVDC and power electronic systems

2001
HVDC is in many respects the ultimate power electronics based FACTS device which can act within an existing AC network or even replace parts of it. In evaluating the usefulness of HVDC it is important to remember the controllability which it adds to the power system in addition to its bulk power transfer capabilities.
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