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:... S. Finney , D. Holliday , Lie Xu
来源:[C].12th IET International Conference on Developments in Power System Protection (DPSP 2014)2014IET
摘要:At present High Voltage Direct Current (HVDC) Voltage Source Converters (VSC) are susceptible dc faults leading to extreme currents. The fault current cannot be controlled by the converter switching flows in the anti-parallel diodes. Protection devices are, therefore, required to...
作者:Yanni Zhong , S. Finney , D. Holliday
来源:[C].7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)2014IET
摘要:Low voltage DC (LVDC) distribution systems offer improved efficiency and reliability in smart grids. A major challenge facing LVDC systems is DC-AC conversion. A study of an effective low voltage DC-AC converter is therefore presented. Modular Multilevel Converter (MMC) performan...
作者:... G.P. Adam , D. Holliday , B.W. Williams
来源:[C].7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)2014IET
摘要:Back-to-back voltage source and current source converters are key components of many power conversion systems. Various topologies have evolved around these conventional voltage and current source converters in an attempt to meet different design and reliability constraints. This ...
作者:... L. Ben-Brahim , B.W. Williams , D. Holliday
来源:[C].3rd Renewable Power Generation Conference (RPG 2014)2014IET
摘要:In inverter-based distributed generation (IBDG) and similar to the conventional third order LCL filter, the high order LLCL filter is difficult to stabilize, and may cause a resonance between the inverter and the grid. Passive damping techniques were explored in literature by con...
作者:D. Holliday , D. Drury
来源:[C].5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)2010IET
摘要:A sensorless position estimation scheme based on a modified model reference adaptive structure, and designed specifically for a permanent magnet machine deployed on-board an aircraft and subject to extreme temperatures, is developed and verified experimentally. The technique, bas...
作者:D. Salt , D. Drury , D. Holliday
来源:[C].5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)2010IET
摘要:An accuracy and robustness comparison is made between three high-frequency carrier-based sensorless control techniques. The high-frequency carrier signal may be injected on an arbitrary stationary three-phase axis or the estimated, synchronously rotating d or g-axis. Nonlinear di...
作者:... C. Hargis , W. Drury , D. Holliday
来源:[C].5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)2010IET
摘要:A method of analysing switching waveforms using their derivative terms shows that imposing an 'S-shaped' profile on the switching transitions offers significant improvements in the control of power loss and radiated EMI in power converters. Numerical modelling to investigate the ...
作者:D. Holliday , T.C. Green , B.W. Williams
来源:[C].Proceedings of 5th International Conference on Power Electronics and Variable-Speed Drives1994IET
摘要:An online parameter measurement technique which yields results similar to classical machine tests is used to determine the stator and rotor winding parameters for a cage induction machine. Low magnitude, high frequency voltage sets are injected into the machine's supply so that t...
作者:T. Rashid , D. Holliday , D.A. Grant
来源:[C].6th International Conference on Power Electronics and Variable Speed Drives1996IET
摘要:A linearised, small-signal perturbation model of a PWM AC-DC voltage source power converter under phase and amplitude control is used to investigate the effect of DC link capacitance on the transient response of the power converter. The model uses classical s-plane techniques and...

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