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  • Conference paper
    Kondala Rao G, Mitcheson PD, Green TC, 2009,

    Mixed Electromechanical Simulation of Electrostatic Microgenerator Using Custom-Semiconductor Device Models

    , PowerMEMS 2009, Pages: 356-359, ISSN: 2151-3155
  • Journal article
    Karagiannis D, Sassano M, Astolfi A, 2009,

    Dynamic scaling and observer design with application to adaptive control

    , AUTOMATICA, Vol: 45, Pages: 2883-2889, ISSN: 0005-1098
  • Journal article
    Lee LM, Hui SY, 2009,

    Automatic lamp detection and operation for warm-start tubular fluorescent lamps

    , IEEE Transactions on Power Electronics, Vol: 24, Pages: 2933-2941, ISSN: 0885-8993

    The availability of T5 high-efficiency (HE) and T5 high-output (HO) fluorescent lamp families not only increases the number of commonly used tubular fluorescent lamps from 9 to 18, but more importantly, increases the chance of ballastlamp mismatch because T5 HO and T5 HE lamps have similar physical outlooks and dimensions but vastly different lamp characteristics. The large number of lamp types increases the number of specific ballast designs and users have the new inconvenience of ensuring the correct matching of the lamps and ballasts. In this paper, a survey and analysis of lamp characteristics of all commonly used T5, T8, and T12 tubular fluorescent lamps is presented. Based on the heated lamp electrodes, lamp voltage, and lamp current, a classification system that maps the lamp characteristics into various groups for automatic lamp detection is proposed. The successful implementation of this method is explained and demonstrated. © 2006 IEEE.
  • Journal article
    Kondoh J, Shafiu A, Jenkins N, Pudjianto D, Strbac Get al., 2009,

    Investigation of direct load management scheme while considering end users comfort

    , IEEJ Transactions on Power and Energy, Vol: 129, ISSN: 0385-4213

    A direct load management scheme with two-way communication while considering end users comfort is proposed. First, the control algorithm is developed and the data required to be transmitted between system operator and controllable loads is identified. Then, the actions of controllable air conditioners and the power adjustment of dispersed generators to eliminate overloads in a substation transformer are simulated. The results indicate that the proposed load management technique performs effectively to reduce overloads on the transformer while maintaining energy consumption in each loads, and the performance is improved by coordination with the output of dispersed generators. © 2009 The Institute of Electrical Engineers of Japan.
  • Journal article
    Domahidi A, Chaudhuri B, Korba P, Majumder R, Green TCet al., 2009,

    Self-tuning flexible ac transmission system controllers for power oscillation damping: A case study in real time

    , IET Generation, Transmission & Distribution, Vol: 3, Pages: 1079-1089
  • Journal article
    Thommyppillai M, Evangelou S, Sharp RS, 2009,

    Car driving at the limit by adaptive linear optimal preview control

    , Vehicle System Dynamics, Vol: 47
  • Journal article
    JMC C, Kountouriotis PA, Vinter RB, 2009,

    A New Gaussian Mixture Algorithm for GMTI Tracking Under a Minimum Detectable Velocity Constraint

    , IEEE T AUTOMAT CONTR, Vol: 54, Pages: 2745-2756, ISSN: 0018-9286

    This paper introduces a new methodology to account for Doppler blind zone constraints, arising, for example, in ground moving target indicator (GMTI) tracking applications. In such problems, target measurements are suppressed when the range rate (Doppler) of the target drops below a specified threshold in magnitude (the minimum detectable velocity). The proposed method, employing Gaussian mixture approximations to the filtering density, differs from earlier Gaussian mixture approaches in the way missed measurements are modelled. The distinctive feature of the algorithm, as compared with other Gaussian mixture filters, is that it is based on an exact calculation of the filtering density when a measurement is not recorded. Algorithms that result from applying this methodology are simple to implement and computationally undemanding. Simulation results indicate a uniform improvement in estimation accuracy over that of earlier proposed analytic techniques, and a tracking performance comparable to that of state-of-the-art particle filters.
  • Conference paper
    Xu T, Taylor P, Prodanovic M, Green T, Davidson E, McArthur Set al., 2009,

    Case based reasoning for distributed voltage control

    Distribution networks were not designed with significant levels of Distributed Generation (DG) in mind, therefore the proliferation of DG results in a number of technical challenges. Controlling network voltages, while also providing adequate DG access, represents one of the most important challenges. This paper presents research being carried out, as part of the UK AuRA -NMS research project, to address this challenge through the novel application of novel case based reasoning.
  • Conference paper
    Cao DM, Pudjianto D, Strbac G, Ferris R, Foster I, Aten Met al., 2009,

    Examination of the impact of possible distribution network design on network losses

    In the present climate where reducing CO2 emissions is of increasing importance, reducing losses is becoming one of the important factors considered in distribution network design and operational strategies. This paper simulates various potential network design scenarios using generic distribution network models and evaluates their impact on network losses.
  • Conference paper
    Aunedi M, Štrbac G, Pudjianto D, 2009,

    Characterisation of portfolios of distributed energy resources under uncertainty

    The paper proposes a model to determine the optimal strategy of offering electricity at the day-ahead market for a portfolio of Distributed Energy Resources. The stochastic nature of the problem is taken into account through uncertainty of generator output and forecasts of day-ahead and imbalance prices. The model attempts to maximise the expected profit of the portfolio when exposed to imbalance prices and output uncertainty. Portfolios analysed included conventional generators, wind generators, or both. The results indicate that the proposed approach is able to adapt the offering strategy to the risk profile in different times of the day. Also, significant synergic effects are demonstrated when wind and conventional generators are aggregated into a single portfolio, due to increased flexibility in internal portfolio balancing.
  • Conference paper
    Gan CK, Silva N, Pudjianto D, Strbac G, Ferris R, Foster I, Aten Met al., 2009,

    Evaluation of alternative distribution network design strategies

    A statistical distribution network design tool has been developed to quantitatively assess the impact of alternative distribution network investment plans in terms of capital costs, losses and reliability. In contrast to idealistic and network specific design approaches, this paper presents a statistical assessment approach in which the optimal network design policies are determined by evaluating the costs and benefits of different designs applied on a number of networks with similar properties such as consumer distributions, types, numbers and load density. Simulations have been carried out on multiple voltage levels (LV, MV and HV).
  • Conference paper
    Stanojević V, Silva V, Pudjianto D, Strbac G, Lang P, Macleman Det al., 2009,

    Application of storage and demand side management to optimise existing network capacity

    In response to distribution network operational challenges such as aging network assets, the presence of Distributed Generation and expected load growth, new approaches are need to unlock existing network capacity. This paper presents a new methodology for assessing the potential benefits of using storage and Demand Side Management (DSM) to mitigate network congestion and increase the utilisation of the network assets. The methodology is based on a linear multi-period DC optimal power flow (OPF), where DSM and Storage are modelled as a part of the optimisation constraints. Storage and DSM are used to reduce network congestion and increase intermittent DG integration. The benefits of Storage and DSM are evaluated by comparing scenarios without and with these enabling technologies on an urban distribution network considering historical time series data for demand and wind output. The results obtained illustrate the potential applications of Storage and DSM to increase the network capacity utilisation and to reduce both wind curtailment and congestion costs.
  • Conference paper
    Howey DA, Holmes AS, Pullen KR, 2009,

    Measurement of stator heat transfer in air-cooled axial flux permanent magnet machines

    , 35th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON 2009), Publisher: IEEE, Pages: 1197-1202
  • Journal article
    Howey DA, Pullen KR, Holmes AS, 2009,

    Radially resolved measurement of stator heat transfer in a rotor-stator disc system

    , International Journal of Heat and Mass Transfer, Vol: 53, Pages: 491-501, ISSN: 0017-9310

    This paper describes a new experimental method for measuring stator heat transfer in a rotor–stator disc system using an electrical heater array. The system is partially blocked at the periphery, with radial outflow of rotor-pumped air from an inlet at stator centre. The aim is to improve thermal performance prediction for air-cooled disc type electrical machines. Local Nusselt numbers were measured for 0.6<r/R<1 at three non-dimensional gap ratios G=g/R=(0.0106,0.0212,0.0297) and rotational Reynolds numbers 3.7e4less-than-or-equals, slantReθless-than-or-equals, slant5.6e5. Transition at the stator is observed to occur at Reθ>3e5 for all gap ratios. Increased Nusselt numbers at the periphery are observed for all Reθ and G because of the ingress of ambient air along the stator due to the rotor pumping effect.
  • Journal article
    Thommyppillai M, Evangelou S, Sharp RS, 2009,

    Advances in the development of a virtual car driver

    , MULTIBODY SYSTEM DYNAMICS, Vol: 22, Pages: 245-267, ISSN: 1384-5640
  • Journal article
    Carnevale D, Astolfi A, 2009,

    Hybrid Observer for Global Frequency Estimation of Saturated Signals

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 54, Pages: 2461-2464, ISSN: 0018-9286
  • Conference paper
    Acha S, Green TC, Shah N, 2009,

    Impacts of plug-in hybrid vehicles and combined heat and power technologies on electric and gas distribution network losses

    , 2009 IEEE PES/IAS Conference on Sustainable Alternative Energy (SAE), Publisher: IEEE, Pages: 1-7

    Distribution network operators (DNOs) require strategies that can offset the tradeoffs new embedded technologies have on their assets. This paper employs modelling to show that through control device manipulation, gas and electric (G&E) network operators can influence savings in energy losses under the presence of plug-in hybrid vehicles (PHEVs) and combined heat and power technologies (CHPs). An integrated gas and electric optimal power flow (OPF) tool is introduced to undertake various case studies. The OPF tool evaluates the technical impacts experienced in the networks when DNOs apply a "plug and forget" operation strategy and then compares the results against a "loss minimisation" strategy. Results show the benefits in applying different strategies are more considerable in electric networks than in gas networks. The study corroborates that an integrated G&E analysis offers a fresh perspective for stakeholders in evaluating energy service networks performance under different operation strategies.
  • Journal article
    Thommyppillai M, Evangelou S, Sharp RS, 2009,

    Rear-heavy car control by adaptive linear optimal preview

    , Vehicle System Dynamics
  • Journal article
    Spjotvold J, Kerrigan EC, Mayne DQ, Johansen TAet al., 2009,

    Inf-sup control of discontinuous piecewise affine systems

    , INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL, Vol: 19, Pages: 1471-1492, ISSN: 1049-8923
  • Conference paper
    Mayne DQ, Rakovic SV, Findeisen R, Allgoewer Fet al., 2009,

    Robust output feedback model predictive control of constrained linear systems: Time varying case

    , 45th IEEE Conference on Decision and Control, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 2082-2087, ISSN: 0005-1098
  • Journal article
    Andrieu V, Praly L, Astolfi A, 2009,

    Asymptotic tracking of a reference trajectory by output-feedback for a class of non linear systems

    , SYSTEMS & CONTROL LETTERS, Vol: 58, Pages: 652-663, ISSN: 0167-6911
  • Journal article
    Blanchini F, Parisini T, Pellegrino FA, Pin Get al., 2009,

    High-Gain Adaptive Control: A Derivative-Based Approach

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 54, Pages: 2164-2169, ISSN: 0018-9286
  • Journal article
    Strbac G, Ramsay C, Moreno R, 2009,

    This Sustainable Isle

    , IEEE POWER & ENERGY MAGAZINE, Vol: 7, Pages: 44-52, ISSN: 1540-7977
  • Journal article
    Strbac G, Ramsay C, Moreno R, 2009,

    This Sustainable Isle - Can Regulated Markets Deliver on the United Kingdom's Green Power Challenges?

    , IEEE Power and Energy Magazine, Vol: 7, Pages: 42-52
  • Conference paper
    Thommyppillai M, Evangelou S, Sharp RS, 2009,

    Towards a Practical Virtual Racing-Car Driver

    , European Control Conference 2009
  • Journal article
    Yan W, Hui SYR, Chung HSH, 2009,

    Energy saving of large-scale high-intensity-discharge lamp lighting networks using a central reactive power control system

    , IEEE Transactions on Industrial Electronics, Vol: 56, Pages: 3069-3078, ISSN: 0278-0046

    This paper summarizes the test results on several large-scale lighting systems based on a range of high-intensity-discharge (HID) lamps. The study focuses on the energy-saving, energy-efficiency, and dimming characteristics of magnetic-ballast-driven HID lamp systems that are suitable for public lighting networks. A central energy-saving unit that can change the input mains voltage of 220 V to a variable voltage within the range from 220 to 170 V is used to control a large lighting network. This central dimming unit offers a new freedom for users to use lighting energy when and where it is needed and to an appropriate power level. Lamp characteristics under full and reduced voltage operation for six types of HID lamps have been measured. Six large-scaled networks of ballast-lamp sets have been set up and dimmed with a central energy-saving unit with a rated power of 13.2 kVA per phase. The full load current under test was set at about 40 A per phase. The loss of the energy-saving unit on a per-lamp-set basis was measured at different voltage levels. It is found that the energy-saving unit can reduce overall system power at least 40% without causing lamp flickering. Through the controllable voltage range, there is no obvious change in color temperature. The lamp power and light output decrease almost linearly with input voltage within the range from 170 to 220 V, and the power loss of the energy-saving unit is less than 2.4% of the full power in all tests. For these large-scaled lighting networks, it is envisaged that 25%-35% of energy saving can be achieved in large public lighting applications. © 2009 IEEE.
  • Journal article
    Casagrande D, Astolfi A, Parisini T, 2009,

    Switching-Driving Lyapunov Function and the Stabilization of the Ball-and-Plate System

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 54, Pages: 1881-1886, ISSN: 0018-9286
  • Journal article
    Jabr RA, Pal BC, 2009,

    Ordinal optimisation approach for locating and sizing of distributed generation

    , IET GENERATION TRANSMISSION & DISTRIBUTION, Vol: 3, Pages: 713-723, ISSN: 1751-8687
  • Journal article
    Hui SYR, Qin YX, 2009,

    A General Photo-Electro-Thermal Theory for Light Emitting Diode (LED) Systems

    , IEEE Transactions on Power Electronics, Vol: 24, Pages: 1967-1976
  • Journal article
    Pin G, Raimondo DM, Magni L, Parisini Tet al., 2009,

    Robust Model Predictive Control of Nonlinear Systems With Bounded and State-Dependent Uncertainties

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 54, Pages: 1681-1687, ISSN: 0018-9286

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