2023 |
Liu Y, Mirzaeva G, Coates C, 'Review of Control Strategies for Matrix Converters', 2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023 (2023)
This paper provides an extensive review of control strategies for Matrix Converters (MC), starting from early research in 1980s and including the most recent and ongoing developme... [more]
This paper provides an extensive review of control strategies for Matrix Converters (MC), starting from early research in 1980s and including the most recent and ongoing developments. The paper identifies and discusses four main approaches, namely: direct control; linear (PI) control with pulse width modulation (PWM); model predictive control (MPC); and state feedback control. Two novel control strategies for MC (fixed division MPC and state feedback control with power matching), proposed by the authors, are included in the paper scope. The paper compares performance of the selected control schemes by simulation. It demonstrates the benefits of state feedback control for MC and outlines future directions of its improvement.
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2023 |
Liu Y, Mirzaeva G, Coates C, 'Delay Compensation in Variable-Speed Drives Based on State Feedback Control', 2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023 (2023)
Implementation of electric drive control inevitable involves a one-cycle delay, known as "transport", or implementation, delay. To address this issue, the current paper ... [more]
Implementation of electric drive control inevitable involves a one-cycle delay, known as "transport", or implementation, delay. To address this issue, the current paper focuses on state feedback control with state and disturbance observers. Amongst other advantages, state feedback control allows for delay compensation using the system state prediction. To validate this strategy, both traditional PI control and state feedback control are implemented and compared by simulation. The paper shows that state feedback control offers superior performance to PI control, particularly, in the presence of implementation delays.
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2023 |
Mo Y, Mirzaeva G, Coates C, 'DC Microgrids in Electric Transport: Power Converters, Control and Application Example', 2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023 (2023)
Microgrids are widely used for renewable energy integration. They rely on high performance power converters. This paper discusses three-phase interleaved DC/DC converters based on... [more]
Microgrids are widely used for renewable energy integration. They rely on high performance power converters. This paper discusses three-phase interleaved DC/DC converters based on the standard inverter topology. Mathematical analysis and simulation results demonstrate the dramatic effect of interleaving on the input and output current ripple for both buck and boost converters. These converters are then utilized in a decentralized DC microgrid that uses current measurements instead of droop and telecommunication. The paper shows how the current sharing functionality can be embedded in the design of the measurement filters. As a result, converters are decoupled from each other but provide coordinated response to the load changes. The paper then proposes using such a DC microgrid as an onboard power system for electric transport. A case study included in the paper details the DC microgrid application to an electrical boat and illustrates its performance in different modes of operation. The paper findings are supported by simulations.
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2023 |
Mo Y, Mirzaeva G, Coates C, 'State feedback with observers for DC-DC converters', 2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023 (2023)
DC-DC converters are widely used in various applications, including renewable energy integration and electric transport. Performance of DC-DC converters can be improved through us... [more]
DC-DC converters are widely used in various applications, including renewable energy integration and electric transport. Performance of DC-DC converters can be improved through using advanced control methods. This paper introduces state feedback control with state and disturbance observers for a buck converter. The paper includes detailed mathematical modelling in both continuous-time and discrete-time domains, as well as detailed design of the observer and control parameters. The paper compares performance of state feedback control and PI control and shows advantages of the former. Detailed simulations in MATLAB/Simulink environment validate the paper findings.
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2019 |
Jiang J, Coates C, Summers T, 'Accurate reactive power sharing in renewable-prioritized islanded microgrids', 2019 21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe, Genova, Italy (2019) [E1]
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Nova |
2018 |
Sun KW, Summers TJ, Coates CE, 'Oscillating Power Minimization in Cascaded H-bridge Converter with Phase-Shifted Carrier PWM', 2018 20TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'18 ECCE EUROPE), Riga, LATVIA (2018) [E1]
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Nova |
2018 |
Jiang J, Coates C, 'Droop control based strategy for photovoltaic sources in an islanded microgrid', Australasian Universities Power Engineering Conference (AUPEC 2018): Proceedings, Auckland, New Zealand (2018) [E1]
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Nova |
2018 |
Sun K, Summers T, Coates C, 'Current Ripple Reduction for Cascaded H-bridge Converter with Phase-Shifted Carrier PWM', 2018 IEEE 4th Southern Power Electronics Conference, SPEC 2018, Singapore (2018) [E1]
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Nova |
2018 |
Jiang J, Coates C, 'Power Sharing Scheme for an Islanded Microgrid Including Renewables and Battery Storage', 2018 IEEE 4th Southern Power Electronics Conference, SPEC 2018, Singapore (2018) [E1]
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Nova |
2017 |
Sun KW, Summers TJ, Coates CE, 'Evaluation of Peak-to-Peak Current Ripple of Phase Shifted Carrier PWM Multilevel Cascaded H-Bridge Converters', 2017 IEEE SOUTHERN POWER ELECTRONICS CONFERENCE (SPEC), Puerto Varas, CHILE (2017)
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2017 |
Sun KW, Summers TJ, Coates CE, Starkey CJ, 'Implementation of a Multilevel Cascaded H-Bridge Drive for an Ironless Axial Flux Permanent Magnet Motor for Electric Vehicle Applications', 2017 19TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'17 ECCE EUROPE), Warsaw, POLAND (2017) [E1]
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Nova |
2017 |
Jiang J, Coates C, 'Voltage Collapse Issue in a Photovoltaic Source Operating in an Islanded Microgrid', 2017 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING CONFERENCE (AUPEC), Melbourne, AUSTRALIA (2017) [E1]
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Nova |
2017 |
Sun KW, Summers TJ, Coates CE, 'Evaluation of Peak-to-Peak Current Ripple of Phase Shifted Carrier PWM Multilevel Cascaded H-Bridge Converters', 2017 IEEE SOUTHERN POWER ELECTRONICS CONFERENCE (SPEC), Puerto Varas, CHILE (2017) [E1]
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Nova |
2016 |
Sun KW, Summers TJ, Coates CE, 'Ironless axial flux permanent magnet motor control with multilevel cascaded H-bridge converter for electric vehicle applications', 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016, Auckland, NZ (2016) [E1]
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Nova |
2012 |
Batt NJ, Coates C, 'Maximising output power of self-excited induction generators for small wind turbines', Proceedings: 2012 XXth International Conference on Electrical Machines, Marseille (2012) [E1]
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2011 |
Kosman J, Viswanath A, Coates C, 'Lagrange relaxation based unit commitment for thermal, solar and wind power generation', PESA 2011: IASTED International Conference on Power and Energy Systems and Applications, Pittsburgh (2011) [E1]
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2011 |
Batt NJ, Coates CE, 'Optimal matching of a self-excited induction generator to a small wind turbine', 30th ISES Biennial Solar World Congress 2011, SWC 2011, Kassel, Germany (2011) [E1] |
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2010 |
Goodwin GC, Mayne DQ, Chen T, Coates C, Mirzaeva G, Quevedo DE, 'Opportunities and challenges in the application of advanced control to power electronics and drives', Proceedings. ICIT 2010: IEEE-ICIT 2010 International Conference on Industrial Technology, Vina Del Mar, Chile (2010) [E1]
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Nova |
2009 |
Choon CC, Coates C, Viswanath A, 'Renewable energy source emulator', Sustainability in Energy and Buildings: Proceedings of the International Conference in Sustainability in Energy and Buildings (SEB'09), Brighton, UK (2009) [E1]
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Nova |
2007 |
Griffiths M, Coates C, 'Behaviour of microgrids in the presence of unbalanced loads', 2007 AUSTRALASIAN UNIVERSITIES POWER ENGINEERING, VOLS 1-2, Curtin Univ Technol, Perth, AUSTRALIA (2007)
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2007 |
Coates C, Macready AR, 'Comparison of simulation models for self-excited induction generators', 2007 Australasian Universities Power Engineering Conference. AUPEC '07. Proceedings, Perth, WA (2007) [E1] |
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2007 |
Macready AR, Coates C, 'Low cost wind turbine controller', 2007 Australasian Universities Power Engineering Conference. AUPEC '07. Proceedings, Perth, WA (2007) [E1]
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2007 |
Griffiths MN, Coates C, 'Behaviour of microgrids in the presence of unbalanced loads', 2007 Australasian Universities Power Engineering Conference. AUPEC '07. Proceedings, Perth, WA (2007) [E1]
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2007 |
Mirzaeva G, Coates C, 'A high performance drive for the rotary coal breaker application', Proceedings of the IEEE Industry Applications Conference, 2007: 42nd IAS Annual Meeting, New Orleans (2007) [E1]
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2006 |
Griffiths MN, Coates C, 'Modelling and Performance of Low Voltage Distributed Generation Systems', Proceedings of the 2006 Australasian Universities Power Engineering Conference (AUPEC'06), Melbourne VIC, Australia (2006) [E1] |
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Nova |
2005 |
Mirzaeva G, Middleton RH, Coates C, McKerihan J, 'Electrical Drive Technology Advances for Mining Applications', 2005 Australian Mining Technology Conference : 'new technologies to produce more with less' : 27 - 28 September 2005 Fremantle, WA, Fremantle, Western Australia (2005) [E1]
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Nova |
2004 |
Coates C, 'Electrical drive issues in rope shovels and longwall mining machines', CD ROM, Noosa (2004) [E1] |
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Nova |
2003 |
Coates C, Pulle DW, Veltman A, 'Modelling of Single Phase Induction Machines', Proceedings for AUPEC 2003, Christchurch, NZ (2003) [E1] |
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2001 |
Coates C, Platt GM, Gosbell VJ, 'Performance Evaluation of a Nine-Phase Synchronous Reluctance Drive', 2001 IEEE Industry Applications Conference 36th IAS Annual Meeting, Chicago, Illinois, USA (2001) [E2]
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Nova |
2001 |
Coates C, Platt GM, Gosbell VJ, 'Performance of Nine-Phase Synchronous Reluctance Drive', The 4th IEEE International Conference on Power Electronics and Drive Systems, Bali, Indonesia (2001) [E2]
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2000 |
Coates C, Platt D, Gosbell VJ, 'Control and Performance of a Nine Phase Synchronous Reluctance Drive', AUPEC 2000 Innovation for Secure Power, Brisbane, Australia (2000) [E1] |
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1997 |
Coates CE, Platt D, Perera BSP, 'Design optimization of an axially laminated synchronous reluctance motor', Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) (1997)
The rotor saliency of the axially laminated synchronous reluctance motor (SynRM) produces a square airgap flux density distribution. If a square current distribution interacts wit... [more]
The rotor saliency of the axially laminated synchronous reluctance motor (SynRM) produces a square airgap flux density distribution. If a square current distribution interacts with this flux the SynRM generates its optimal torque. This paper extends previous work on the magnetic modelling of the SynRM. A design model is proposed which incorporates all rotor and stator dimensions. Saturation effects have also been included in the model. The key dimensions affecting SynRM performance are identified as rotor radius, rotor pole pitch, rotor steel : steel+fibre ratio, airgap, stator current density and stator slot opening. An iterative algorithm is determined for the design optimization process. This algorithm is simple enough to be implemented in a spreadsheet environment. The model is used to design a 5 kW motor with an optimal torque/unit mass ratio. The designed motor has a nine phase concentrated winding to approximate the ideal square current excitation. Finite element analysis and a static load test on the constructed machine confirm the model's predictions. In addition, optimal values for the key motor dimensions, over a range of motor sizes, are determined and discussed.
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