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• Conference paper
  Toh TT, Mitcheson PD, Dussud L, Wright SW, Holmes ASet al., 2011,

  Electronic Resonant Frequency Tuning of a Marine Energy Harvester

  , PowerMEMS 2011, Pages: 383-386
  • Open Access Link
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• Conference paper
  Dicken J, Mitcheson PD, Elliott A, Yeatman EMet al., 2011,

  Single-Supply Pre-Biasing Circuit for Low-Amplitude Energy Harvesting Applications

  , PowerMEMS 2011, Pages: 46-49
  • Cite
• Conference paper
  Mukherjee AG, Mitcheson PD, Wright SW, Yeatman EMet al., 2011,

  Tuning Resonant Energy Harvesters Using a Variable Reluctance Link

  , PowerMEMS 2011, Pages: 11-14
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• Journal article
  Sturt A, Strbac G, 2011,

  Time series modelling of power output for large-scale wind fleets

  , WIND ENERGY, Vol: 14, Pages: 953-966, ISSN: 1095-4244
  • Author Web Link
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  • Citations: 16
• Journal article
  Terzija V, Cai D, Stanojevic V, Strbac Get al., 2011,

  Frequency and Power Components Estimation from Instantaneous Power Signal

  , IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, Vol: 60, Pages: 3640-3649, ISSN: 0018-9456
  • Author Web Link
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  • Citations: 13
• Journal article
  Lin D, Yan W, Hui SYR, 2011,

  Modelling the warm-up phase of the starting processes of high-intensity discharge lamps

  , IET SCIENCE MEASUREMENT & TECHNOLOGY, Vol: 5, Pages: 199-205, ISSN: 1751-8822
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  • Citations: 5
• Patent
  Berggren B, Majumder R, Ray S, Chaudhuri B, Chaudhuri NRet al., 2011,

  Power or Voltage Oscillation Damping in Power Systems

  The invention provides a method, device and computer program product for providing improved control of power or voltage oscillation damping in a power transmission system. The device comprises a magnitude obtaining element (30) configured to obtain an instantaneous magnitude of a signal ( I ΔP I ) representing a deviating oscillation in at least one element (12) of the power transmission system, a slope investigating element (58) configured to determine the rate of change of the signal, and a first processing block (34) comprising an integrating element (38) configured to integrate the instantaneous magnitudes with an integrating factor (Ki) that is based on the determined rate of change. The first processing block is further configured to form a phase compensation angle (ϕc) based on the integrated instantaneous magnitude for use in a damping control signal generating unit in order to provide power or voltage oscillation damping of the system.

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• Journal article
  Lee CK, Su YP, Hui SYR, 2011,

  Printed Spiral Winding Inductor With Wide Frequency Bandwidth

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 26, Pages: 2936-2945, ISSN: 0885-8993
  • Author Web Link
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  • Citations: 41
• Journal article
  Chaudhuri NR, Majumder R, Chaudhuri B, Pan Jet al., 2011,

  Stability Analysis of VSC MTDC Grids Connected to Multimachine AC Systems

  , IEEE TRANSACTIONS ON POWER DELIVERY, Vol: 26, Pages: 2774-2784, ISSN: 0885-8977
  • Author Web Link
  • Open Access Link
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  • Citations: 129
• Journal article
  Prieto-Araujo E, Bianchi FD, Junyent-Ferre A, Gomis-Bellmunt Oet al., 2011,

  Methodology for Droop Control Dynamic Analysis of Multiterminal VSC-HVDC Grids for Offshore Wind Farms

  , IEEE TRANSACTIONS ON POWER DELIVERY, Vol: 26, Pages: 2476-2485, ISSN: 0885-8977
  • Author Web Link
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  • Citations: 203
• Journal article
  Trilla L, Gomis-Bellmunt O, Junyent-Ferre A, Mata M, Sanchez Navarro J, Sudria-Andreu Aet al., 2011,

  Modeling and Validation of DFIG 3-MW Wind Turbine Using Field Test Data of Balanced and Unbalanced Voltage Sags

  , IEEE TRANSACTIONS ON SUSTAINABLE ENERGY, Vol: 2, Pages: 509-519, ISSN: 1949-3029
  • Author Web Link
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  • Citations: 48
• Journal article
  Bettiol P, Frankowska H, Vinter RB, 2011,

  L∞ estimates on trajectories confined to a closed subset

  , Journal of Differential Equations, Vol: 252, Pages: 1912-1933, ISSN: 1090-2732

  This paper concerns the validity of estimates on the distance of an arbitrary state trajectory from the set of state trajectories which lie in a given state constraint set. These so called distance estimates have wide-spread application in state constrained optimal control, including justifying the use of the Maximum Principle in normal form and establishing regularity properties of value functions. We focus on linear, L∞ distance estimates which, of all the available estimates have, so far, been the most widely used. Such estimates are known to be valid for general, closed state constraint sets, provided the functions defining the dynamic constraint are Lipschitz continuous, with respect to the time and state variables. We ask whether linear, L∞ distance estimates remain valid when the Lipschitz continuity hypothesis governing t-dependence of the data is relaxed. We show by counter-example that these distance estimates are not valid in general if the hypothesis of Lipschitz continuity is replaced by continuity. We also provide a new hypothesis, ‘absolute continuity from the left’, for the validity of linear, L∞ estimates. The new hypothesis is less restrictive than Lipschitz continuity and even allows discontinuous time dependence in certain cases. It is satisfied, in particular, by differential inclusions exhibiting non-Lipschitz t-dependence at isolated points, governed, for example, by a fractional-power modulus of continuity. The relevance of distance estimates for state constrained differential inclusions permitting fractional-power time dependence is illustrated by an example in engineering design, where we encounter an isolated, square-root type singularity, concerning the t-dependence of the data.

  • Abstract
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• Journal article
  Lin D, Yan W, Hui SYR, 2011,

  Modeling of Dimmable Fluorescent Lamp Including the Tube Temperature Effects

  , IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 58, Pages: 4145-4152, ISSN: 0278-0046
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  • Citations: 11
• Journal article
  Zhong WX, Liu X, Hui SYR, 2011,

  A Novel Single-Layer Winding Array and Receiver Coil Structure for Contactless Battery Charging Systems With Free-Positioning and Localized Charging Features

  , IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 58, Pages: 4136-4144, ISSN: 0278-0046
  • Author Web Link
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  • Citations: 193
• Journal article
  Lee CK, Li S, Hui SYR, 2011,

  A Design Methodology for Smart LED Lighting Systems Powered By Weakly Regulated Renewable Power Grids

  , IEEE TRANSACTIONS ON SMART GRID, Vol: 2, Pages: 548-554, ISSN: 1949-3053
  • Author Web Link
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  • Citations: 61
• Journal article
  Castro M, Pudjianto D, Djapic P, Strbac Get al., 2011,

  Reliability-driven transmission investment in systems with wind generation

  , IET GENERATION TRANSMISSION & DISTRIBUTION, Vol: 5, Pages: 850-859, ISSN: 1751-8687
  • Author Web Link
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  • Citations: 5
• Journal article
  Zhong WX, Choi WP, Ho WWC, Hui SYet al., 2011,

  Generalized Self-Driven AC-DC Synchronous Rectification Techniques for Single- and Multiphase Systems

  , IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 58, Pages: 3287-3297, ISSN: 0278-0046
  • Author Web Link
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  • Citations: 3
• Journal article
  Kondoh J, Shafiu A, Jenkins N, Pudjianto D, Strbac Get al., 2011,

  Investigation of Direct Load Management Scheme with Consideration of End-User Comfort

  , ELECTRICAL ENGINEERING IN JAPAN, Vol: 176, Pages: 19-28, ISSN: 0424-7760
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• Journal article
  Mayne DQ, Kerrigan EC, van Wyk EJ, Falugi Pet al., 2011,

  Tube-based robust nonlinear model predictive control

  , International Journal of Robust and Nonlinear Control, Vol: 21, Pages: 1341-1353, ISSN: 1099-1239

  This paper extends tube-based model predictive control of linear systems to achieve robust control of nonlinear systems subject to additive disturbances. A central or reference trajectory is determined by solving a nominal optimal control problem. The local linear controller, employed in tube-based robust control of linear systems, is replaced by an ancillary model predictive controller that forces the trajectories of the disturbed system to lie in a tube whose center is the reference trajectory thereby enabling robust control of uncertain nonlinear systems to be achieved.

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• Journal article
  Gomis-Bellmunt O, Junyent-Ferre A, Sumper A, Bergas-Jane Jet al., 2011,

  Control of a Wind Farm Based on Synchronous Generators With a Central HVDC-VSC Converter

  , IEEE Transactions on Power Systems, Vol: 26, Pages: 1632-1640, ISSN: 1558-0679

  A control scheme for wind farms based on synchronousgenerators connected to a single power converter ispresented. The scheme is applicable to HVDC interfaced offshoreor remote wind farms. The proposed control scheme is based oncomputing the optimal wind farm electrical frequency dependingon the different incoming wind speeds. The power converterregulates the system frequency by adjusting the power injected tothe HVDC circuit. Fault ride-through is also possible by reducingrapidly the injected active power. The proposed scheme is validatedby means of simulations with a wind farm composed of fourwind turbines.

  • Abstract
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• Journal article
  Jones BL, Kerrigan EC, Morrison JF, Zaki TAet al., 2011,

  Flow estimation of boundary layers using DNS-based wall shear information

  , International Journal of Control, Vol: 84, Pages: 1310-1325, ISSN: 1366-5820

  This article investigates the problem of obtaining a state-space model of the disturbance evolution that precedes turbulent flow across aerodynamic surfaces. This problem is challenging since the flow is governed by nonlinear, partial differential-algebraic equations for which there currently exists no efficient controller/estimator synthesis techniques. A sequence of model approximations is employed to yield a linear, low-order state-space model, to which standard tools of control theory can be applied. One of the novelties of this article is the application of an algorithm that converts a system of differential-algebraic equations into one of ordinary differential equations. This enables straightforward satisfaction of boundary conditions whilst dispensing with the need for parallel flow approximations and velocity–vorticity transformations. The efficacy of the model is demonstrated by the synthesis of a Kalman filter that clearly reconstructs the characteristic features of the flow, using only wall velocity gradient information obtained from a high-fidelity nonlinear simulation.

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• Journal article
  Howell SD, Duck PW, Hazel A, Johnson PV, Pinto H, Strbac G, Proudlove N, Black Met al., 2011,

  A partial differential equation system for modelling stochastic storage in physical systems with applications to wind power generation

  , IMA JOURNAL OF MANAGEMENT MATHEMATICS, Vol: 22, Pages: 231-252, ISSN: 1471-678X
  • Author Web Link
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  • Citations: 8
• Journal article
  Howey DA, Holmes AS, Pullen KR, 2011,

  Measurement and CFD Prediction of Heat Transfer in Air-Cooled Disc-Type Electrical Machines

  , IEEE T IND APPL, Vol: 47, Pages: 1716-1723, ISSN: 0093-9994
  • Publisher Web Link
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• Journal article
  Gan CK, Mancarella P, Pudjianto D, Strbac Get al., 2011,

  Statistical appraisal of economic design strategies of LV distribution networks

  , ELECTRIC POWER SYSTEMS RESEARCH, Vol: 81, Pages: 1363-1372, ISSN: 0378-7796
  • Author Web Link
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  • Citations: 27
• Journal article
  Angeli D, Praly L, 2011,

  Stability Robustness in the Presence of Exponentially Unstable Isolated Equilibria

  , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 56, Pages: 1582-1592, ISSN: 0018-9286
  • Author Web Link
  • Open Access Link
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  • Citations: 32
• Journal article
  Howey DA, Bansal A, Holmes AS, 2011,

  Design and performance of a cm-scale shrouded wind turbine for energy harvesting

  , Smart Materials and Structures, Vol: 20, Pages: 1-12
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• Patent
  Trainer DR, Soto-Sanchez DE, Green TC, Merlin MMCet al., 2011,

  DC Network Active Filtering using VSC

  , WO 2,013,000,510
  • Cite
• Journal article
  Wu R, Sin JKO, Hui SY, 2011,

  Novel silicon-embedded coreless transformer for on-chip isolated signal transfer

  , IEEE Magnetics Letters, Vol: 2, ISSN: 1949-307X

  In this letter, a novel silicon-embedded coreless transformer is proposed and demonstrated. The transformer is fabricated in the thick bottom layer of a silicon substrate and connected to the frontside through vias opened in the thin top layer where all other components of the system can be fabricated. A 5-turn coreless transformer fabricated using this monolithic transformer technology achieves a small area of 2 mm2 and a good voltage gain of larger than -0.8 dB (load = 50 Ω, best reported so far) from 12 to 100 MHz. This technology shows great potential for on-chip isolated signal transfer. © 2011 IEEE.

  • Abstract
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  • Citations: 14
• Journal article
  Chen W, Hui SYR, 2011,

  A Dimmable Light-Emitting Diode (LED) Driver With Mag-Amp Postregulators for Multistring Applications

  , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 26, Pages: 1714-1722, ISSN: 0885-8993
  • Author Web Link
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  • Citations: 69
• Journal article
  Took CC, Strbac G, Aihara K, Mandic DPet al., 2011,

  Quaternion-valued short-term joint forecasting of three-dimensional wind and atmospheric parameters

  , RENEWABLE ENERGY, Vol: 36, Pages: 1754-1760, ISSN: 0960-1481
  • Author Web Link
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  • Citations: 64

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