Key Contacts

Dr Gary Preston is a Power Systems Engineer with extensive experience in power system modelling and analysis. Gary specialises in the area of electromagnetic transients and has carried out numerous fault, switching, and lightning studies using EMTP-ATP and PSCAD software to investigate fast and very fast transient phenomena. Gary has managed a wide range of technical projects, ranging from detailed power systems studies to innovation projects. He produces excellent reports and ensures that deliverables are produced on time, within budget, and to the highest standards in terms of quality.

Steve leads the Offshore Renewables work at TNEI and has exceptional experience in large projects and offshore wind.

He a Chartered Electrical Engineer with over 25 years experience in the design, installation and commissioning of projects within the power industry and has a broad range of experience in power systems studies, grid code compliance, technical strategy and project management for the power sector, including offshore transmission and offshore wind. 

Luke has 13 years’ experience working with a diverse range of large and/or critical electrical power systems including petrochemical plants, power stations, pharmaceutical plants, banks and data centres.

His professional experience includes power systems analysis, power quality measurements and analysis, protection coordination and forensic analysis of failed plant. His varied professional experience has required excellent written and verbal communication skills in addition to a broad technical knowledge.

Xuecheng is is a power system specialist with over 30 years experience in power systems computation and analysis including bulk power systems modelling and simulations, power system steady state and dynamic analysis, power system security and stability assessment, network planning and strategy development, planning and security of supply standards and grid code compliance.

He has published several papers for IEEE transactions and conference, and has been involved as a regular reviewer in reviewing papers for IET Generation, Transmission and Distribution Journal. 

Muhammad is a power system engineer with over nine years of experience. He has been involved with power system studies including load flow, fault level, P28 power quality (transformer inrush, flicker, voltage step change), harmonics, fault-ride through, dynamic reactive power and voltage control, load rejection and frequency control studies for a number of onshore and offshore wind farms.

His varied professional experience includes performing electrical studies on industrial and renewable projects, and calculating network use charges for distribution companies.

Dr Andrew Oliver’s core skills are in power systems analysis and developing tools to perform complex studies using Python, with over 10 years of experience.

He has more than ten years of experience including load flow, fault level, harmonics, filter design, reactive power, transient analysis and network planning studies amongst others. Since joining TNEI in early 2009 Andrew has been involved in varied projects including studies for wind farms (on and offshore), PV connections and for transmission and distribution network operators.

Diptargha specialises in modelling and analysis of transmission and distribution networks. His core expertise includes power system stability analysis, grid integration of renewable energy and dynamic demand response.

He has a strong academic background coupled with good understanding of new concepts in power networks e.g. microgrids, active network management, dynamic frequency support, point-of-load voltage control. 

Zoë has a utilities background in generation and distribution, totalling 12 years. Zoë is able to draw on plant operations and asset management experience, as well as network planning, power systems analysis and generation integration.

With a passion for renewable energy and a post graduate qualification in sustainable energy systems, Zoë has been closely involved in South Africa’s Renewable Energy Independent Power Producer Procurement Programme and has experience in strategic and optimal grid integration of renewable generation at all voltage levels. 

Vijay is a senior consultant with over 10 years’ experience in the power sector. His experience includes network compliance studies, industrial studies and project management.

At TNEI Vijay has managed a vast number of renewable & conventional generations, Oil & Gas, STOR & battery storage sites and metro station projects.

His professional experience includes various power systems analysis studies- load flow, short circuit, transient stability, protection coordination, harmonics, arc flash studies.

Jean-Louis has a broad range of experience in power systems studies including grid code compliance, insulation coordination and transient recovery voltage study.

Prior to joining TNEI, he spent more than twenty years professional experience in Electrical engineering including with ALSTOM, AREVA T&D and ALSTOM Grid where he held the position of Principal Research Technologist and gained the title Senior Expert in Power System and Electrical Machines. 

David has 10 years experience within the energy sector from having worked for an energy organisation both in Southern Africa and in the United Kingdom.

His unique experiences in engineering design, installation and commissioning of projects, have afforded him the opportunity to enable practicable, technical and innovative solutions within the electrical distribution and power engineering discipline. 

Rieghard is an electrical engineer with 10 years’ experience in the electrical utility and renewable energy consulting industry. He spent 7.5 years working for the South African utility, Eskom Distribution’s Operations and Maintenance department where he fulfilled various engineering and management roles. He was involved in initiating and implementing various maintenance and network improvement projects, network analysis, fault investigations, technical audits, compliance management and establishing and managing maintenance contracts. Rieghard also has more than 2 years’ experience performing and overseeing multidisciplinary owner’s engineering, technical due diligence and design services for renewable energy clients, including developers, investors and EPC Contractors across Sub-Saharan Africa and Australia. Rieghard is a registered Professional Engineer with the Engineering Council of South Africa and holds B.Eng and PhD(Eng) degrees in Electrical Engineering and an Electrical Engineer’s Government Certificate of Competency (Factories).

Raghavendra has over 10 years of experience in the field of power systems and R&D and has catered to various customers in conventional power generation, renewables, transmission and bulk power consuming industries. He has in depth knowledge of steady state and dynamic modelling of power systems in power system analysis tools such as ETAP, NEPLAN, Powerfactory, PSS/E, PSCAD and MiPower. 

Prior to joining TNEI Services Ltd. he has led several grid interconnections, islanding & load shedding, power quality and power system protection studies for industries, T&D utilities and developers. 

Mark has a proven track record of Network Modelling and since joining TNEI has become proficient at using DIgSILENT PowerFactory.

In addition to Mark’s power system modelling experience he has also been involved in a wide variety of innovation projects.

His most recent projects have allowed him to research area’s such as Blackstart via distributed energy resources (DER); the impact of high penetration renewable energy integration onto the electricity network and the use of non-synchronous renewable generation for ancillary services.

Max is primarily focused on mathematical modelling and data analysis. Max has developed a wide range of subsequent skills to contextualise and convey the impact of the subject under analysis through various mediums.

This is enveloped by his experience in full-stack development, providing a foundation to design and launch interactive and intuitive means of data visualisation. 

Ewan joined TNEI in August 2016. Since graduating from his academic studies and joining TNEI, Ewan has specialised in Environmental Acoustics work but has also drawn on a range of environmental and engineering experiences including environmental impact assessments, site finding and feasibility assessments and GIS mapping.

Ewan has worked on projects in sectors including onshore wind, offshore wind, oil & gas, residential, port services, conventional energy and low carbon transport.   

Hugh is a Technical Consultant having joined TNEI in March 2021 and provides technical advice to clients on energy related projects. Hugh holds a MEng in Civil & Transportation Engineering. Prior to joining TNEI, Hugh gained experience in the Construction & Civil Engineering sectors. Over Hugh’s 10 years in the Construction & Civil Engineering industries he has gained substantial site-based experience in construction management, project coordination, health & safety management, quality control and commercial management. Hugh has worked on some big projects over Scotland and Northern England, including as a construction site manager on a 22.5MW onshore wind farm and as a package engineer on the conversion of a coal fired power station to biomass.

Jack has experience in GIS and CAD, producing figures and plans for a range of projects for submission as part of planning applications, including onshore wind, offshore wind, gas peaking plants, battery storage, solar and electric vehicle charging.

He has conducted a number of site finding and feasibility assessments, as well as inputting into Environmental Impact Assessments

Obinna is involved in various power system studies including load flow, short circuit, P28 power quality (transformer inrush, voltage step change, flicker) reactive capability, network capability assessment, wind farm constraint analysis and calculating network use charges for distribution companies.

He also has expertise in scripting in multiple languages for automation of power system studies, and therefore is involved in developing and adapting software tools for more complex power system studies. Obinna holds a PhD in Power Systems Engineering.