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  • Journal article
    Falugi P, Giarre L, 2009,

    Identification and validation of quasispecies models for biological systems

    , SYSTEMS & CONTROL LETTERS, Vol: 58, Pages: 529-539, ISSN: 0167-6911
  • Journal article
    Jabr RA, Pal BC, 2009,

    Computing closest saddle node bifurcations in a radial system via conic programming

    , INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, Vol: 31, Pages: 243-248, ISSN: 0142-0615
  • Conference paper
    Castanos F, Ortega R, van der Schaft A, Astolfi Aet al., 2009,

    Asymptotic stabilization via control by interconnection of port-Hamiltonian systems

    , 13th Congress on Latinoamerican of Automatic Control, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 1611-1618, ISSN: 0005-1098
  • Conference paper
    Chang H, Astolfi A, 2009,

    Enhancement of the immune system in HIV dynamics by output feedback

    , 17th IFAC World Congress, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 1765-1770, ISSN: 0005-1098
  • Journal article
    Singh R, Pal BC, Jabr RA, 2009,

    Choice of estimator for distribution system state estimation

    , IET Generation, Transmission & Distribution, Vol: 3, Pages: 666-678, ISSN: 1751-8687

    In this study, a statistical framework is introduced to assess the suitability of various state estimation (SE) methodologies for the purpose of distribution system state estimation (DSSE). The existing algorithms adopted in the transmission system SE are reconfigured for the distribution system. The performance of three SE algorithms has been examined and discussed in standard 12-bus and 95-bus UK-GDS network models.
  • Conference paper
    Chaudhuri NR, Ray S, Majumder R, Chaudhuri Bet al., 2009,

    A case study on challenges for robust wide-area phasor POD

    , IEEE Power and Energy Society General Meeting
  • Conference paper
    Moreno R, Konstantinidis CV, Pudjianto D, Strbac Get al., 2009,

    The New Transmission Arrangements in the UK

    , IEEE Power and Energy Society 2009 General Meeting
  • Conference paper
    Moreno R, Bezerra B, Barroso L, Mocarquer S, Rudnick Het al., 2009,

    Auctioning Adequacy in South America through Long-Term Contracts and Options: From Classic Pay-as-Bid to Multi-Item Dynamic Auctions

    , IEEE Power and Energy Society 2009 General Meeting
  • Conference paper
    Mohr R, Moreno R, Rudnick H, 2009,

    Insertion of Distributed Generation into Rural Feeders

    , Integration of Wide-Scale Renewable Resources Into the Power Delivery System, CIGRE/IEEE PES Joint Symposium
  • Conference paper
    Moreno R, Vasilakos C, Pudjianto D, Strbac Get al., 2009,

    Impact of Wind Generation Uncertainty on Transmission Expansion Models

    , Integration of Wide-Scale Renewable Resources Into the Power Delivery System, CIGRE/IEEE PES Joint Symposium
  • Conference paper
    Arif J, Chaudhuri NR, Ray S, Chaudhuri Bet al., 2009,

    Online Levenberg-Marquardt algorithm for neural network based estimation and control of power systems

    , International Joint Conference on Neural Networks, Publisher: IEEE, Pages: 199-206, ISSN: 1098-7576

    Levenberg-Marquardt (LM) algorithm, a powerfuloff-line batch training method for neural networks, is adaptedhere for online estimation of power system dynamic behavior.A special form of neural network compatible with the feedbacklinearization framework is used to enable non-linear self-tuningcontrol. Use of LM is shown to yield better closed-loop performancecompared to conventional recursive least square (RLS) approach.For successive disturbance use of LM in conjunction withnon-linear neural network structure yields faster convergencecompared to RLS. A case study on a test system demonstratesthe effectiveness of the online LM method for both linear andnonlinear estimation over RLS estimation (linear).
  • Journal article
    Qin YX, Lin DY, Hui SYR, 2009,

    A simple method for comparative study on the thermal performance of light emitting diodes (LED) and fluorescent lamps

    , Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Pages: 152-158

    A simple method is proposed to measure the heat dissipation of LEDs and fluorescent lamps in an open system which allows light energy to escape. Based on this method, a comparative study on the thermal and luminous performance of high-brightness LEDs and fluorescent lamps is presented. At rated power, T5 & T8 fluorescent lamps generate about 73%-77% of their total power as heat, whilst three types of highbrightness LEDs dissipate about 87% to 90% of input power as heat. Heat dissipation is an important factor particularly for airconditioned buildings when overall energy efficiency is considered. T5 fluorescent lamps perform better than some existing LEDs in terms of luminous efficacy and heat generation in this study. © 2009 IEEE.
  • Journal article
    Yates DC, Holmes AS, 2009,

    Preferred Transmission Frequency for Size-Constrained Ultralow-Power Short-Range CMOS Oscillator Transmitters

    , IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, Vol: 56, Pages: 1173-1181, ISSN: 1549-8328
  • Journal article
    Hui SYR, Qin YX, 2009,

    A general photo-electro-thermal theory for light emitting diode (LED) systems

    , Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Pages: 554-562

    The photometric, electrical and thermal features of LED systems are highly dependent on one another. By considering all these factors together, it is possible to optimize the design of LED systems. This paper presents a general theory that links the photometric, electrical and thermal behaviors of a LED system together. The theory shows that the thermal design is an indispensible part of the electrical circuit design and will strongly influence the peak luminous output of LED systems. It can be used to explain why the optimal operating power, at which maximum luminous flux is generated, may not occur at the rated power of the LEDs. This theory can be used to determine the optimal operating point for a LED system so that the maximum luminous flux can be achieved for a given thermal design. The general theory has been verified favorably by experiments using high-brightness LEDs. ©2009 IEEE.
  • Journal article
    Lee LM, Hui SYR, 2009,

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

    , Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Pages: 1518-1525

    The availability of T5 high-efficiency (HE) and 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 ballast-lamp 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. ©2009 IEEE.
  • Journal article
    Angeli D, 2009,

    Further Results on Incremental Input-to-State Stability

    , IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 54, Pages: 1386-1391, ISSN: 0018-9286
  • Journal article
    Ortega R, Astolfi A, 2009,

    FEEDBACK

    , IEEE CONTROL SYSTEMS MAGAZINE, Vol: 29, Pages: 16-16, ISSN: 1066-033X
  • Conference paper
    Bansal A, Howey DA, Holmes AS, 2009,

    Cm-Scale Air Turbine and Generator for Energy Harvesting from Low-Speed Flows

    , TRANSDUCERS 2009, International Solid-State Sensors, Actuators and Microsystems Conference, Publisher: IEEE, Pages: 529-532
  • Conference paper
    Moreno R, Rudnick H, 2009,

    Risk Allocation for Efficient and Timely Transmission Investment under Markets with High Demand Growth

    , PowerTech 2009 IEEE
  • Conference paper
    Moreno R, Vasilakos C, Pudjianto D, Strbac Get al., 2009,

    A Cost-Benefit Approach for Transmission Investment with a Non-Linear Transmission Cost Function

    , PowerTech 2009 IEEE
  • Journal article
    Liang J, Green TC, Feng C, Weiss Get al., 2009,

    Increasing Voltage Utilization in Split-Link, Four-Wire Inverters

    , IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 24, Pages: 1562-1569, ISSN: 0885-8993
  • Journal article
    Angeli D, 2009,

    Convergence in Networks With Counterclockwise Neural Dynamics

    , IEEE TRANSACTIONS ON NEURAL NETWORKS, Vol: 20, Pages: 794-804, ISSN: 1045-9227
  • Conference paper
    Angeli D, 2009,

    A Tutorial on Chemical Reaction Network Dynamics

    , 10th European Control Conference, Publisher: ELSEVIER, Pages: 398-406, ISSN: 0947-3580
  • Journal article
    Chaudhuri B, Ray S, Majumder R, 2009,

    Robust low-order controller design for multi-modal power oscillation damping using flexible AC transmission systems devices

    , IET GENERATION TRANSMISSION & DISTRIBUTION, Vol: 3, Pages: 448-459, ISSN: 1751-8687
  • Journal article
    Karagiannis D, Astolfi A, Ortega R, Hilairet Met al., 2009,

    A Nonlinear Tracking Controller for Voltage-Fed Induction Motors With Uncertain Load Torque

    , IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, Vol: 17, Pages: 608-619, ISSN: 1063-6536
  • Journal article
    Angeli D, De Leenheer P, Sontag ED, 2009,

    Chemical Networks with Inflows and Outflows: A Positive Linear Differential Inclusions Approach

    , BIOTECHNOLOGY PROGRESS, Vol: 25, Pages: 632-642, ISSN: 8756-7938
  • Journal article
    Laila DS, Messina AR, Pal BC, 2009,

    A refined Hilbert-Huang transform with applications to interarea oscillation monitoring

    , IEEE Transactions on Power Systems, Vol: 24, Pages: 610-620, ISSN: 0885-8950

    This paper focuses on the refinement of standard Hilbert–Huang transform (HHT) technique to accurately characterize time varying, multicomponents interarea oscillations. Several improved masking techniques for empirical mode decomposition (EMD) and a local Hilbert transformer are proposed and a number of issues regarding their use and interpretation are identified. Simulated response data from a complex power system model are used to assess the efficacy of the proposed techniques for capturing the temporal evolution of critical system modes. It is shown that the combination of the proposed methods result in superior frequency and temporal resolution than other approaches for analyzing complicated nonstationary oscillations.
  • Journal article
    Singh R, Pal BC, Vinter RB, 2009,

    Measurement Placement in Distribution System State Estimation

    , IEEE Transactions on Power Systems, Vol: 24, Pages: 668-675, ISSN: 0885-8950

    This paper introduces a technique for meter placement for the purpose of improving the quality of voltage and angle estimates across a network. The proposed technique is based on the sequential improvement of a bivariate probability index governing relative errors in voltage and angle at each bus. The meter placement problem is simplified by transforming it into a probability bound reduction problem, with the help of the two sided-Chebyshev inequality. A straightforward solution technique is proposed for the latter problem, based on the consideration of 2-$sigma$ error ellipses. The benefits of the proposed technique are revealed by Monte Carlo simulations on a 95-bus UKGDS network model
  • Journal article
    Goulart PJ, Kerrigan EC, Alamo T, 2009,

    Control of Constrained Discrete-Time Systems With Bounded ℓ2 Gain

    , IEEE Transactions on Automatic Control
  • Journal article
    Angeli D, Hirsch MW, Sontag ED, 2009,

    Attractors in coherent systems of differential equations

    , JOURNAL OF DIFFERENTIAL EQUATIONS, Vol: 246, Pages: 3058-3076, ISSN: 0022-0396

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