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Dr Steve Mitchell

Conjoint Senior Lecturer

School of Elect Engineering and Computer Science (Electrical and Computer Engineering)

Career Summary

Biography

Steve Mitchell was born in Newcastle in 1969. In 1988 he began his Electrical Engineering degree in conjunction with a 7 year Industrial Traineeship. The Traineeship provided a broad range of electrical engineering experience including train/locomotive design and manufacture and heavy industry plant maintenance. Steve graduated with honours in 1995 and for the next five years he worked as a design engineer for an electronics company that manufactured equipment for mining and industrial applications. During this time his work primarily focussed on the design of control and protection relays which are now widely used in underground mining settings both in Australia and internationally. In 2000 Steve was appointed as a senior research assistant at the University of Newcastle. The research was based on the condition monitoring of high voltage bushings. From 2005 he was appointed as a professional officer at the university, providing electronic design and teaching support to the Electrical Engineering Department. In 2009 Steve was appointed as a Lecturer in Electrical Engineering at the University of Newcastle. Whilst employed by the University of Newcastle, Steve began a part time research higher degree. Steve's PhD was titled "Power Transformer Modelling to Support the Interpretation of Frequency Response Analysis" and was awarded in 2011. Following on from his roots in heavy industry, Steve's research interests continue to be primarily focussed on the design, condition monitoring and diagnostics of equipment found in the power, mining and heavy industry areas.

Research Expertise
Steve's research is in the area of condition monitoring, diagnostics and control of power and heavy industrial equipment. His particular area of focus is in power transformer diagnostics including Frequency Response Analysis and the localisation of partial discharge.

Teaching Expertise
Steve's teaching focus is in the area of analog and digital electronics, programmable logic design, embedded programming, and advanced computer systems.

Administrative Expertise
Administrative duty experience includes: - Program Convenor for Computer Engineering - Marketing leader for the Discipline of Electrical Engineering - Student Experience for the Discipline of Electrical Engineering - Industry Scholarships for Computer Engineering.


Qualifications

  • PhD, University of Newcastle
  • Bachelor of Engineering, University of Newcastle

Keywords

  • Computer Engineering
  • Condition Monitoring
  • Electrical Engineering
  • Frequency Response Analysis
  • High Voltage Equipment
  • Partial Discharge
  • Power Transformers

Languages

  • English (Fluent)

Fields of Research

CodeDescriptionPercentage
090607Power and Energy Systems Engineering (excl. Renewable Power)100

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
1/07/2014 - 31/12/2014Research AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
1/02/2009 - 30/06/2009Casual AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
18/02/2008 - 30/06/2008Casual AcademicUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia

Academic appointment

DatesTitleOrganisation / Department
1/07/2009 - LecturerUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
1/01/2008 - Membership - Institute of Electrical and Electronics Engineers (IEEE)Institute of Electrical & Electronic Engineers (IEEE)
Australia
1/03/2004 - 1/06/2009Professional OfficerUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia
1/10/2000 - 1/03/2004Senior Research AssistantUniversity of Newcastle
School of Elect Engineering and Computer Science
Australia

Professional appointment

DatesTitleOrganisation / Department
1/01/1996 - 1/11/2000Design EngineerBramco Electronics
Australia
1/01/1988 - 1/04/1995Engineering CadetA. Goninan & Co Pty Ltd
Australia

Awards

Recognition

YearAward
1995Spruson & Ferguson Prize in Electrical / Computer Engineering
University of Newcastle

Research Award

YearAward
2007Best Student Paper Award
Unknown
2006Postgraduate Research Prize for Electrical, Computer and Communications Engineering
University of Newcastle
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (6 outputs)

YearCitationAltmetricsLink
2015Mitchell SD, Oliveira GHC, 'Analysing a power transformer's internal response to system transients using a hybrid modelling methodology', International Journal of Electrical Power and Energy Systems, 69 67-75 (2015)

This article presents a novel approach to analysing a power transformer's internal response to system transients. In this approach a hybrid modelling methodology is adopted which ... [more]

This article presents a novel approach to analysing a power transformer's internal response to system transients. In this approach a hybrid modelling methodology is adopted which leverages the distinct advantages offered by both Black and Grey Box modelling techniques. The Black Box model of the transformer is used within the EMTP system study environment in order to take advantage of its mathematical flexibility and modelling accuracy. Transients derived from network switching operations within the study can then be used for injection tests within the Grey Box modelling environment. The Grey Box model, which is based upon the physical structure of the transformer, will facilitate analysis of the transformer's internal voltage response to the external stimulus. A fundamental difference between the approach described in this paper and more traditional approaches is that it does not require prior knowledge of the internal geometry of the transformer. All of the modelling parameters are derived from external tests, nameplate details and an intrinsic understanding of common transformer design principles. This can be a distinct advantage since in most cases a transformer's design specifications are not readily available outside of the laboratory due to the manufacturer's intellectual property restrictions. A study of a gas insulated substation within a hydroelectric power plant in Brazil is used to demonstrate the proposed technique.

DOI10.1016/j.ijepes.2014.12.064
2014Mitchell SD, Rocha ADCO, Holdyk A, Gustavsen B, Jaarsveld BJ, Portillo A, et al., 'Electrical Transient Interaction between Transformers and the Power System', Electra (CIGRE), 97-103 (2014) [C2]
2013Mitchell SD, Welsh JS, 'Initial parameter estimates and constraints to support gray box modeling of power transformers', IEEE Transactions on Power Delivery, 28 2411-2418 (2013) [C1]

An accurate transformer model is an important tool for use in the study of power transformers. However, a manufacturer's proprietary restrictions will generally make access to the... [more]

An accurate transformer model is an important tool for use in the study of power transformers. However, a manufacturer's proprietary restrictions will generally make access to the detailed design specifications of a transformer difficult. Therefore, in order to construct a physically representative transformer model, it is often necessary to estimate the model parameters. One approach is to fit the model to data obtained from tests, such as frequency-response analysis. However, during the process of fitting a model to a data set, it is critical that the estimated parameters appropriately represent the transformer under test. An estimator that is not constrained can converge on a parameter set which may satisfy the objective function but is not physically representative of the transformer. It is therefore important to constrain the model parameters. The aim of this paper is to formulate a methodology to obtain initial estimates and constraints for several fundamental transformer parameters. To demonstrate applicability, the initial parameter estimates and constraints are applied to a range of distribution transformers of varying age and manufacture, ranging in size from 200 kVA to 18 MVA. © 1986-2012 IEEE.

DOI10.1109/TPWRD.2013.2259266
CitationsScopus - 3Web of Science - 3
Co-authorsJames Welsh
2011Mitchell SD, Welsh JS, 'Modeling power transformers to support the interpretation of frequency-response analysis', IEEE Transactions on Power Delivery, 26 2705-2717 (2011) [C1]
DOI10.1109/TPWRD.2011.2164424
CitationsScopus - 22Web of Science - 17
Co-authorsJames Welsh
2010Mitchell SD, Welsh JS, 'The influence of complex permeability on the broadband frequency response of a power transformer', IEEE Transactions on Power Delivery, 25 803-813 (2010) [C1]
DOI10.1109/TPWRD.2009.2036358
CitationsScopus - 2Web of Science - 2
Co-authorsJames Welsh
2007Mitchell SD, Welsh JS, Middleton RH, Phung BT, 'Practical implementation of a narrowband high frequency distributed model for locating partial discharge in a power transformer', 2007 ELECTRICAL INSULATION CONFERENCE AND ELECTRICAL MANUFACTURING EXPO, 127-131 (2007)
DOI10.1109/EEIC.2007.4562603Author URL
CitationsScopus - 1Web of Science - 1
Co-authorsRichard Middleton, James Welsh
Show 3 more journal articles

Conference (14 outputs)

YearCitationAltmetricsLink
2014Mirzaeva G, Ghaffarpour M, Mitchell SD, Gay D, 'DC power vs AC power for mobile mining equipment', Proceedings of 2014 IEEE Industry Applications Society Annual Meeting, Vancouver, BC, Canada (2014) [E1]
DOI10.1109/IAS.2014.6978455
2013Oliveira GHC, Mitchell SD, 'Comparison of Black-Box Modeling Approaches for Transient Analysis: A GIS case study', Proceedings of the 10th International Conference on Power Systems Transients, Vancouver, CA (2013) [E1]
Author URL
2012Mirzaeva G, Mitchell SD, 'Duty meter approach in condition monitoring of industrial electric motors', Proceedings of the 2012 Australian Mining Technology Conference, Perth, Western Australia (2012) [E1]
2012Mitchell SD, Oliveira GHC, 'A hybrid modelling methodology for analysing the effect of system transients within power transformers', AUPEC 2012 22nd Australasian Universities Power Engineering Conference, Bali, Indonesia (2012) [E1]
2011Mitchell SD, Welsh JS, 'Estimation of physical transformer parameters from frequency response analysis', IEEE PES Trondheim PowerTech 2011: The Power of Technology for a Sustainable Society, Trondheim, Norway (2011) [E1]
DOI10.1109/PTC.2011.6019187
Co-authorsJames Welsh
2010Mitchell SD, Welsh JS, Oliveira GHC, 'Physical modelling of power transformers utilising end to end frequency response analysis', CIGRE International Workshop on Power Transformers, VI Workspot, Parana, Brasil (2010) [E2]
Co-authorsJames Welsh
2010Oliveira GHC, Schauenburg FF, Maestrelli R, Rocha ACO, Mitchell SD, Welsh JS, 'SimPowerSystems para Estudo de Transitorios no Sistema Irape - Aracuai Visando Uso de Modelos Caixa-Preta de Transformadores', CIGRE International Workshop on Power Transformers, VI Workspot, Parana, Brasil (2010) [E3]
Co-authorsJames Welsh
2010Oliveira GHC, Mitchell SD, Welsh JS, 'Modeling approaches based on FRA tests for simulating and analyzing a power transformer's dynamic behavior: A comparison', ARWtr 2010 Proceedings, Santiago de Compostela, Spain (2010) [E1]
Co-authorsJames Welsh
2009Mitchell SD, Welsh JS, 'Permeability and its influence on the broadband frequency response of a power transformer', 2009 Asia-Pacific Power and Energy Engineering Conference, Wuhan, China (2009) [E1]
DOI10.1109/appeec.2009.4918596
Co-authorsJames Welsh
2008Mitchell SD, Welsh JS, Phung BT, 'Relating a distribution transformer's connection topology and the influence of inductive disparity to the observed frequency response', AUPEC '08 Australasian Universities Power Engineering Conference 2008, Sydney, NSW (2008) [E1]
Co-authorsJames Welsh
2007Mitchell SD, Welsh JS, Middleton RH, Phung BT, 'Practical implementation of a narrowband high frequency distributed model for locating partial discharge in a power transformer', 2007 EIC/EM EXPO. Electrical Insulation Conference and Electrical Manufacturing Expo. Proceedings, Nashville, TN (2007) [E2]
DOI10.1109/EEIC.2007.4562603
Co-authorsJames Welsh, Richard Middleton
2007Welsh JS, Rojas CR, Mitchell SD, 'Wideband parametric identification of a power transformer', Conference Proceedings of the 2007 Australasian Universities Power Engineering Conference. AUPEC'07, Perth, WA (2007) [E1]
CitationsScopus - 1
Co-authorsJames Welsh
2007Mitchell SD, Welsh JS, Middleton RH, Phung BT, 'A narrow band high frequency distributed power transformer model for partial discharge location', Conference Proceedings of the 2007 Australasian Universities Power Engineering Conference. AUPEC'07, Perth, WA (2007) [E1]
Co-authorsJames Welsh, Richard Middleton
2003Xu S, Mitchell SD, Middleton RH, 'Partial Discharge Localization for a Transformer Based on Frequency Spectrum Analysis', Proceeding for AUPEC 2003, Christchurch, NZ (2003) [E1]
Co-authorsRichard Middleton
Show 11 more conferences

Report (2 outputs)

YearCitationAltmetricsLink
2014Mitchell SD, Rocha ADCO, Holdyk A, Gustavsen B, Jaarsveld BJ, Portillo A, et al., 'Electrical Transient Interaction Between Transformers and the Power System Part 1 - Expertise', CIGRE, 175 (2014) [R1]
2014Mitchell SD, Rocha ADCO, Holdyk A, Gustavsen B, Jaarsveld BJ, Portillo A, et al., 'Electrical Transient Interaction Between Transformers and the Power System Part 2 - Case Studies', CIGRE, 123 (2014) [R1]
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Grants and Funding

Summary

Number of grants8
Total funding$216,833

Click on a grant title below to expand the full details for that specific grant.


20141 grants / $1,500

2014 IEEE PES General Meeting, Washington DC USA, 27-31 July 2014$1,500

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Steve Mitchell
SchemeTravel Grant
RoleLead
Funding Start2014
Funding Finish2014
GNoG1400778
Type Of FundingInternal
CategoryINTE
UONY

20131 grants / $177,333

DC Motor Duty Meter Prototype - Stage 3$177,333

Funding body: Australian Coal Research Limited

Funding bodyAustralian Coal Research Limited
Project TeamDoctor Galina Mirzaeva, Doctor Steve Mitchell, Professor Robert Betz, Doctor Terrence Summers
SchemeAustralian Coal Association Research Program (ACARP)
RoleInvestigator
Funding Start2013
Funding Finish2013
GNoG1200841
Type Of FundingCRC - Cooperative Research Centre
Category4CRC
UONY

20121 grants / $1,500

Australasian University's Power Engineering Conference 2012, Hotel Ramada, Kuta, bali, Indonesia, 26 - 29 September 2012$1,500

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Steve Mitchell
SchemeTravel Grant
RoleLead
Funding Start2012
Funding Finish2012
GNoG1200944
Type Of FundingInternal
CategoryINTE
UONY

20113 grants / $11,500

Winding Deformation Detection in Power Transformers$5,710

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Steve Mitchell
SchemeEarly Career Researcher Grant
RoleLead
Funding Start2011
Funding Finish2011
GNoG1100274
Type Of FundingInternal
CategoryINTE
UONY

Winding Deformation Detection in Power Transformers$4,290

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Steve Mitchell
SchemeEarly Career Researcher (Equipment) Grant
RoleLead
Funding Start2011
Funding Finish2011
GNoG1101005
Type Of FundingInternal
CategoryINTE
UONY

IEEE PES Trondheim PowerTech 2011, Norwegian University of Science and Technology, 19 - 23 June 2011$1,500

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Steve Mitchell
SchemeTravel Grant
RoleLead
Funding Start2011
Funding Finish2011
GNoG1100770
Type Of FundingInternal
CategoryINTE
UONY

20101 grants / $5,000

New Staff Grant 2010$5,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Steve Mitchell
SchemeNew Staff Grant
RoleLead
Funding Start2010
Funding Finish2010
GNoG1000062
Type Of FundingInternal
CategoryINTE
UONY

20091 grants / $20,000

Fault Detection in Electricity Networks$20,000

Funding body: Ausgrid

Funding bodyAusgrid
Project TeamDoctor Steve Mitchell, Doctor James Welsh, Associate Professor Jose De Dona
SchemeSponsorship Agreement
RoleLead
Funding Start2009
Funding Finish2009
GNoG0900082
Type Of FundingOther Public Sector - State
Category2OPS
UONY
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Research Supervision

Current Supervision

CommencedResearch Title / Program / Supervisor Type
2015The Impact of Oil Filled Power Transformer Life Cycle Management Decisions on Retirement Causes
Electrical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Control of Grid Connected Power Electronic Devices
Electrical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2013Condition Monitoring of Power Transformers
Electrical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2013Power Transformers Condition Assessment
Electrical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2013DC Microgrid for Mobile Mining Equipment
Electrical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2011Condition Monitoring of Power Transformers
Electrical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
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Dr Steve Mitchell

Position

Conjoint Senior Lecturer
School of Elect Engineering and Computer Science
Faculty of Engineering and Built Environment

Focus area

Electrical and Computer Engineering

Contact Details

Emailsteve.mitchell@newcastle.edu.au
Phone(02) 4921 6147
Fax(02) 4921 6993

Office

RoomEAG32
BuildingBuilding EA
LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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