英国工程技术协会
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作者:Yiqing Lian , D. Holliday , S. Finney
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:Large offshore wind farms will require an extensive sub-sea power network to provide internal interconnection. Present solutions are based around conventional medium-voltage AC architectures. This paper proposes an alternative DC collection network based around modular DC/DC conv...
作者:Hui Ding , Shengtao Fan , J.Z. Zhou ...
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:This paper proposes a reduced order mathematical model for the VSC converter and its controls by linearizing the combined set of equations of the power system and controller. The reduced order model can preserve the unstable characteristic of the VSC system and provide an explici...
作者:A. Lana , P. Nuutinen , J. Karppanen ...
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:The paper focuses on developing the control for directly connected battery energy storage system (BESS) in low voltage direct current (LVDC) distribution systems. The main purpose of the control is to provide essential connection/disconnection and charge/discharge functions. Addi...
作者:W. Kuehn , D. Mueller
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:Successful integration of offshore wind power via VSC based HVDC transmission systems into the existing power grid requires a full understanding of the inherent potential and possibilities to keep this complex system stable under worst case conditions. These conditions include in...
作者:M. Smailes , C. Ng , R. Fox ...
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:A modular, hybrid HVDC transformer, located in the turbine nacelle has been proposed for the offshore wind industry to improve efficiency and redundancy while reducing costs. The injection of harmonics by the transformer power electronics however, complicates the core loss calcul...
作者:A. Canelhas , S. Karamitsos , M. Bazargan
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:The past decade has seen VSC-HVDC systems deployed to establish transmission schemes both onshore and offshore, often for interconnectors utilizing underground or subsea cables but also a few systems designed to operate on long overhead transmission lines (OHTLs) [1]. In specific...
作者:J. Vaheeshan , M. Barnes , R. Shuttleworth
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:When an HVDC system is subjected to AC side short circuit faults, the transformer core might be driven to saturation at fault recovery due to flux offset. The saturation will therefore cause the flow of inrush currents. In this paper, dynamic models of a MMC based VSC-HVDC system...
作者:C.A. Smith , D.R. Monkhouse , A. Mcintosh
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:The impact of technology and topology selection on the success of a HVDC interconnector project is significant. Rapid technology advances in power electronics, especially Voltage Source Converters (VSC), can offer new opportunities for the commercial success of projects. However,...
作者:A.-K. Marten , C. Troitzsch , D. Westermann
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:One of the most challenging aspects regarding realization of meshed HVDC systems are DC line faults. On the one hand new fault clearing equipment needs to be developed. On the other hand it is very important to define suitable fault detection methods. This is necessary since prov...
作者:A.A. Aboushady , K.H. Ahmed , D. Jovcic
来源:[C].11th IET International Conference on AC and DC Power Transmission2015IET
摘要:This paper focuses on the behaviour of the cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters. Active switches, not designed for fault conditions, are tripped to minimize discharge currents effect on the semiconductor switches. Two lev...

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