Imperial College London
Portrait Picture

Professor Tim Green, FREng

Faculty of Engineering, Department of Electrical and Electronic Engineering

Academic Leader for Sustainability, Professor
 
 
 
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Contact

 

+44 (0)20 7594 6171t.green Website CV

 
 
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Location

 

1107EElectrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
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424 results found

Weiss G, Zhong QC, Green TC, Liang Jet al., 2004, <i>H</i><SUP>∞</SUP> repetitive control of DC-AC converters in microgrids, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 19, Pages: 219-230, ISSN: 0885-8993

Journal article

Hernandez-Aramburo CA, Green TC, 2004, Fuel consumption minimisation of a micro-grid, New York, 39th annual meeting of the Industry-Applications-Society, Seattle, WA, 3 - 7 October 2004, Publisher: IEEE, Pages: 2063-2068

Conference paper

Miao P, Mitcheson PD, Stark BH, Holmes AS, Yeatman EM, Green TCet al., 2004, Fabrication and characterisation of a motion-driven MEMS electrostatic power generator, IOP meeting on "Electrostatics and MEMS", London, 21 April 2004

Conference paper

Stark BH, Mitcheson PD, Miao P, Green TC, Yeatman EM, Holmes ASet al., 2004, Power processing issues for micro-power electrostatic generators, New York, 35th annual IEEE power electronics specialists conference (PESC 04), Aachen, Germany, 20 - 25 June 2004, Publisher: IEEE, Pages: 4156-4162

For various monitoring and sensing applications it is desirable to power the electronics by scavenging energy from any locally available source. A prototype generator for low frequency (human body) motion has been developed using a micro-machined (MEMS) implementation of an inertial generator based on a moving-plate capacitor. The prototype generates pulses of 300 V on a 10 pF capacitor. This paper examines the design of a circuit and mosfet device to convert this energy to a low voltage. Because of the very small charge involved, the effect of leakage and parasitic stored charge are important. A silicon-on-insulator design is proposed and is examined through physics based finite-element simulation. The overall effectiveness of the generation process is shown to be composed of several terms which are functions of system parameters such as. generator flight time, device area and circuit inductance. It is shown that device area is a compromise between leakage current, charge storage and on-state voltage. It can, for a given generator and inductance, be optimised to provide the maximum energy yield.

Conference paper

Soto D, Peña R, Gutierrez F, Green TCet al., 2004, A new power flow controller based on a bridge converter topology, 35th Annual IEEE Power Electronics Specialists Conference (PESC 04), Publisher: IEEE, Pages: 2540-2545, ISSN: 0275-9306

Conference paper

Mitcheson PD, Miao P, Stark BH, Yeatman EM, Holmes AS, Green TCet al., 2004, MEMS electrostatic micropower generator for low frequency operation, Publisher: Elsevier, Pages: 523-529, ISSN: 0924-4247

This paper describes the analysis, simulation and testing of a microengineered motion-driven power generator, suitable for application in sensors within or worn on the human body. Micro-generators capable of powering sensors have previously been reported, but these have required high frequency mechanical vibrations to excite a resonant structure. However, body-driven movements are slow and irregular, with large displacements, and hence do not effectively couple energy into such generators. The device presented here uses an alternative, non-resonant operating mode. Analysis of this generator shows its potential for the application considered, and shows the possibility to optimise the design for particular conditions. An experimental prototype based on a variable parallel-plate capacitor operating in constant charge mode is described which confirms the analysis and simulation models. This prototype, when precharged to 30 V, develops an output voltage of 250 V, corresponding to 0.3 μJ per cycle. The experimental test procedure and the instrumentation are also described.

Conference paper

Andersson G, Green T, Pal B, Rehtanz Cet al., 2004, Advanced FACTS control, ABB Review, Vol: 4, Pages: 21-26, ISSN: 1013-3119

FACTS devices – power electronics based devices for controlling var compensation and power flow in electricity supply networks – require specific control algorithms in order for their benefits to be realized in a broad portfolio of applications. To gain the benefits that can arise from the use of more than one FACTS device within a specific network area, ABB has initiated a joint project with the Swiss Federal Institute of Technology and Imperial College London. The project sets out to answer, in an industrially applicable way, questions that arise when coordinating wide area control for power flow control and damping of oscillations

Journal article

Soto D, Pena R, Gutierrez F, Green TCet al., 2004, A new power flow controller based on a bridge converter topology, Galway, Ireland, IEEE power electronics specialist conference (PESC 2004), Publisher: IEEE, Pages: 2540-2545, ISSN: 0275-9306

Conference paper

Green TC, Hernández-Arámburo CA, Smith AC, 2003, Losses in grid and inverter supplied induction machine drives, IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, Vol: 150, Pages: 712-724, ISSN: 1350-2352

Journal article

Green TC, Marks JH, 2003, Ratings of active power filters, IEE PROCEEDINGS-ELECTRIC POWER APPLICATIONS, Vol: 150, Pages: 607-614, ISSN: 1350-2352

Journal article

Mitcheson PD, Stark BH, Miao P, Yeatman EM, Holmes AS, Green TCet al., 2003, Analysis and optimisation of MEMS electrostatic on-chip power supply for self-powering of slow-moving sensors, Guimaraes, Eurosensors 03, 17th European conference on sensors and actuators, University of Minho Guimaraes, Portugal, 21 - 24 September 2003, Publisher: University of Minho, Pages: 48-51

Conference paper

Chaudhuri B, Pal BC, Zolotas AC, Jaimoukha IM, Green TCet al., 2003, Mixed-sensitivity approach to <i>H</i><sub>∞</sub> control of power system oscillations employing multiple FACTS devices, IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 18, Pages: 1149-1156, ISSN: 0885-8950

Journal article

Chaudhuri B, Green TC, Jaimoukha IM, Pal BC, Zolotas ACet al., 2003, Mixed-sensitivity approach to h(infinity) control of power system oscillations employing multiple facts devices, General meeting of IEEE Power Engineering Society, Toronto, Canada, Publisher: IEEE, Pages: 2348-2348

Conference paper

Prodanovic M, Green TC, 2003, Control and filter design of three-phase inverters for high power quality grid connection, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 18, Pages: 373-380, ISSN: 0885-8993

Journal article

Liang J, Green TC, Weiss G, Zhong QCet al., 2003, Hybrid control of multiple inverters in an island-mode distribution system, New York, IEEE 34th annual power electronics specialists conference, Acapulco, Mexico, 15 - 19 Jun 2003, Publisher: IEEE, Pages: 61-66

Conference paper

Rodrigues AO, Viana JJ, Rodrigues LOC, Vasconcelos JA, Ramirez JA, Green T, Freeman EMet al., 2003, 3D visualization of temperature distributions induced by a cellular telephone in a model of the human head, 10th International Microwave and Optoelectronics Conference (IMOC), Publisher: IEEE, Pages: 339-344

Conference paper

Greatbanks JA, Popovic DH, Begovic M, Pregelj A, Green TCet al., 2003, On optimization for security and reliability of power systems with distributed generation, Bologna, Italy, 2003 IEEE Bologna PowerTech, Bologna, Italy, 23 - 26 June 2003, Publisher: IEEE, Pages: 1-8

Conference paper

Begovic M, Pregelj A, Rohatgi A, Greakbanks J, Popovic D, Green Tet al., 2003, GA for optimization of reliability of distributed generation - enhanced feeders, Proceedings of ISAP'03, Lemnos, Greece, September 2003

Conference paper

Liang J, Green TC, Weiss G, Zhong QCet al., 2003, Decoupling control of the active and reactive power for a three-phase inverter, Proceedings of the European control conference, Cambridge, UK, September 2003

Conference paper

Hernandez-Aramburo CA, Green TC, Smith AC, 2003, Estimating rotational iron losses in an induction machine, IEEE Transactions on Magnetics, Vol: 39, Pages: 3527-3533, ISSN: 0018-9464

Journal article

Liang J, Green TC, Weiss G, Zhong QCet al., 2003, Decoupling control of the active and reactive power for a three-phase inverter, Proceedings of the European control conference, Cambridge, UK, September 2003

Conference paper

Green TC, 2003, Power electronics, Electrical engineer's reference book, Editors: Laughton, Warne, Oxford, Publisher: Newnes, Pages: 18/1-18/43, ISBN: 9780750646376

Book chapter

Hernandez-Aramburo CA, Green TC, Smith S, 2003, Assessment of power losses of an inverter-driven induction machine with its experimental validation, IEEE Transactions on Industry Applications, Vol: 39, Pages: 994-1004, ISSN: 0093-9994

Journal article

Soto D, Green TC, 2002, Comparison of high-power converter topologies for the implementation of FACTS controllers, IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, Vol: 49, Pages: 1072-1080, ISSN: 0278-0046

Journal article

Marks JH, Green TC, 2002, Predictive transient-following control of shunt and series active power filters, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 17, Pages: 574-584, ISSN: 0885-8993

Journal article

Rodrigues AO, Malta LRP, Borsali R, Takai RB, Conhalato R, Rodrigues LOC, Freeman EM, Green T, Vasconcelos JA, Ramirez JAet al., 2002, 3D simulation of SAR induced by mobile phones in the human head

This paper presents a thorough investigation of 3D calculation of the specific absorption rate (SAR) distribution in a realistic model of the human head exposed to electromagnetic fields generated by mobile phones. The calculation was made using the FDTD. The source was modeled with a power of 600 mW, as a monopole fed with a current of 300 mA, and variable frequency in the range of 800 MHz to 1.8 GHz. The human head model has a precision of 1.11 mm x 1.86 mm x 1.11 mm in the x, y and z directions, respectively; and is composed of 12 different tissues: air, bone, ERL, brain, skin, muscle, fat and eye (composed of cornea, anterior chamber, lens, vitreous body and sclera). This very fine model allows accurate SAR calculation in different tissues which may have been overlooked in other models.

Conference paper

Zhong QC, Green TC, Liang J, Weiss Get al., 2002, Robust repetitive control of grid-connected DC-AC converters, New York, 41st IEEE conference on decision and control, Las Vegas, Nevada, 10 - 13 December 2002, Publisher: IEEE, Pages: 2468-2473

Conference paper

Rodriques AO, Malta LRP, Borsali R, Takai RB, Conhalato R, Rodrigues LOC, Vasconcelos JA, Green TC, Ramirez Jet al., 2002, SAR calculations in an anatomically realistic model of the head of cellular phone users, The 4th international conference on computation in electromagnetics, CEM 2002. (Ref. No. 2002/063) The Cumberland Hotel, Bournemouth, UK, 8 - 11 April 2002, Publisher: IEE, Pages: 172-173

Conference paper

Zhong QC, Green TC, Liang J, Weiss Get al., 2002, H-infinity control of the neutral point in 3-phase 4-wire DC-AC converters, New York, 28th annual conference of the IEEE Industrial-Electronics-Society, Seville, Spain, 5 - 8 November 2002, Publisher: IEEE, Pages: 520-525

Conference paper

Liang J, Green TC, Weiss G, Zhong QCet al., 2002, Evaluation of repetitive control for power quality improvement of distributed generation, New York, 33rd IEEE annual power electronics specialists conference (PESC02), Cairns, Australia, 23 - 27 Jun 2002, Publisher: IEEE, Pages: 1803-1808

Conference paper

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