Jonathan Shek
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View article: Enhancing MPPT Performance Using Adaptive Population Size and Run Length Distribution Analysis: A Simulation and Experimental Study
Enhancing MPPT Performance Using Adaptive Population Size and Run Length Distribution Analysis: A Simulation and Experimental Study Open
This paper presents an adaptive population size (NP)–based accelerated Particle Swarm Optimization (AAPSO) algorithm for duty cycle–based maximum power point tracking (MPPT) in photovoltaic (PV) systems. The proposed method directly modula…
View article: A Comparative Benchmark of Large Language Models for Labelling Wind Turbine Maintenance Logs
A Comparative Benchmark of Large Language Models for Labelling Wind Turbine Maintenance Logs Open
Cite as: Malyi, M., Shek, J., McDonald, A., & Biscaya, A. (2025). A Comparative Benchmark of Large Language Models for Labelling Wind Turbine Maintenance Logs. arXiv preprint arXiv:2509.06813.
View article: A Low‐Cost Microcontroller Implementation of Fuzzy Controller for Renewable Energy Converters
A Low‐Cost Microcontroller Implementation of Fuzzy Controller for Renewable Energy Converters Open
Microcontrollers (μCs) are extremely useful in renewable energy (RE) converters, where numerous onboard control actions need to be executed at low cost. This paper focusses on a cost‐effective implementation of a fuzzy controller (FC) for …
View article: The Study of Multi-Terminal DC Systems in an Offshore Wind Environment: A Focus on Cable Ripple Analysis
The Study of Multi-Terminal DC Systems in an Offshore Wind Environment: A Focus on Cable Ripple Analysis Open
This paper studies the THD and AC losses on the DC cables of offshore wind farm-based multi-terminal HVDC systems when they extract and deliver power from and to more than one connection point. In the paper, the study of a full system PLEC…
View article: Controller design for a tidal turbine array, considering both power and loads aspects
Controller design for a tidal turbine array, considering both power and loads aspects Open
The complex turbine-wake interactions within a tidal array leads to sub-optimal power generation from most tidal turbines, and results in higher fatigue loading on downstream turbines due to upstream turbines increase the turbulence intens…
View article: A survey of second-life batteries based on techno-economic perspective and applications-based analysis
A survey of second-life batteries based on techno-economic perspective and applications-based analysis Open
The penetration of electrical vehicles (EVs) is exponentially rising to decarbonize the transport sector resulting in the research problem regarding the future of their retired batteries. Landfill disposal poses an environmental hazard, th…
View article: The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System
The Effects of Filter Capacitors on Cable Ripple at Different Sections of the Wind Farm Based Multi-Terminal DC System Open
In most DC power systems, power electronic devices can introduce ripple content into the DC grid, where large input ripple currents on the DC link can have a negative influence. Under these circumstances, DC side filters play an important …
View article: The study of different unidirectional input parallel output series connected <scp>DC‐DC</scp> converters for wind farm based <scp>multi‐connected DC</scp> system
The study of different unidirectional input parallel output series connected <span>DC‐DC</span> converters for wind farm based <span>multi‐connected DC</span> system Open
There is increasing interest in interconnecting individual wind turbines in offshore wind farms using DC networks rather than AC networks. However, the output voltage from each turbine/generator is normally low (less than 6 kV), so DC-DC c…
View article: Author response for "The study of different unidirectional input parallel output series connected DC‐DC converters for wind farm based multi‐connected DC system"
Author response for "The study of different unidirectional input parallel output series connected DC‐DC converters for wind farm based multi‐connected DC system" Open
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View article: An Inter-Comparison of Dynamic, Fully Coupled, Electro-Mechanical, Models of Tidal Turbines
An Inter-Comparison of Dynamic, Fully Coupled, Electro-Mechanical, Models of Tidal Turbines Open
Production of electricity using hydrokinetic tidal turbines has many challenges that must be overcome to ensure reliable, economic and practical solutions. Kinetic energy from flowing water is converted to electricity by a system comprisin…
View article: Dynamic, Fully Coupled, Electro-mechanical Models of Tidal Turbines
Dynamic, Fully Coupled, Electro-mechanical Models of Tidal Turbines Open
Production of electricity using hydro-kinetic tidal turbines has many challenges that must to be overcome to ensure reliable, economic and practical solutions. Energy from flowing water is converted by a system comprising: the turbine roto…
View article: Wave-to-Wire Power Maximization Control for All-Electric Wave Energy Converters with Non-Ideal Power Take-Off
Wave-to-Wire Power Maximization Control for All-Electric Wave Energy Converters with Non-Ideal Power Take-Off Open
The research presented in this paper investigates novel ways of optimizing all-electric wave energy converters for maximum wave-to-wire efficiency. In addition, a novel velocity-based controller is presented which was designed specifically…
View article: Assessment of pulsating torque mitigation control strategy through tidal turbine emulation
Assessment of pulsating torque mitigation control strategy through tidal turbine emulation Open
This article presents the modelling and assessment of a pulsating torque mitigation control strategy by using a tidal turbine emulator in a laboratory environment. Sudden changes and variability of the tidal flow velocity have the effect o…
View article: Investigation of the unbalanced magnetic pull damping effect in squirrel cage induction machines
Investigation of the unbalanced magnetic pull damping effect in squirrel cage induction machines Open
The unbalanced magnetic pull (UMP) in electrical machines is due to the existence of additional magnetic flux waves. When squirrel cage induction machine (SCIM) running below its rated slip, most of the additional magnetic flux waves can b…
View article: A Physics-based prognostics approach for Tidal Turbines
A Physics-based prognostics approach for Tidal Turbines Open
This is the author accepted manuscript. The final version is available from IEEE via the DOI in this record
View article: Minimising UMP in DFIGs
Minimising UMP in DFIGs Open
The doubly fed induction generator (DFIG) has become increasingly popular for variable speed wind turbines because of the lower power electronics converter rating required. However, the small air gap of a DFIG causes it to be vulnerable to…
View article: Guest Editorial Emerging Electric Machines and Drives for Smart Energy Conversion
Guest Editorial Emerging Electric Machines and Drives for Smart Energy Conversion Open
Energy conversion is one of the key steps for human utilizing the energy. In particular, as the key component for electromechanical energy conversion, electric machines play a significant role and greatly promote the development of modern …
View article: Calculation of unbalanced magnetic pull in induction machines through empirical method
Calculation of unbalanced magnetic pull in induction machines through empirical method Open
Unbalanced magnetic pull (UMP) occurred due to the uneven distribution of magnetic flux around the airgap, which can be caused by the existence of rotor eccentricity in the machines. Here, a UMP damping coefficient is introduced to explain…
View article: Reconfigurable Power Electronics Topologies
Reconfigurable Power Electronics Topologies Open
This paper presents two novel topologies for automatically transforming power converter topology from three-phase 3-level cascaded H-bridge to three-phase 2-level converter design. These techniques are implemented by flicking specific swit…
View article: Lessons Learned from 3 Years of Failure: Validating an FMEA with Historical Failure Data
Lessons Learned from 3 Years of Failure: Validating an FMEA with Historical Failure Data Open
This is the author accepted manuscript. The final version is available from EWTEC via the link in this record.
View article: Hybrid, Multi-Megawatt HVDC Transformer Topology Comparison for Future Offshore Wind Farms
Hybrid, Multi-Megawatt HVDC Transformer Topology Comparison for Future Offshore Wind Farms Open
With the wind industry moving further offshore, High Voltage Direct Current (HVDC) transmission is becoming increasingly popular. HVDC transformer substations are not optimized for the offshore industry though, increasing costs and reducin…
View article: Direct drive wave energy array with offshore energy storage supplying off‐grid residential load
Direct drive wave energy array with offshore energy storage supplying off‐grid residential load Open
Current developments in wave energy conversion have focused on locations where the wave energy resource is the highest; using large devices to generate hundreds of kilowatts of power. However, it is possible to generate power from low powe…
View article: Modeling and Characterization of Downwind Tower Shadow Effects Using a Wind Turbine Emulator
Modeling and Characterization of Downwind Tower Shadow Effects Using a Wind Turbine Emulator Open
This paper presents the modeling and characterization of the tower shadow effects using a wind turbine emulator in a laboratory environment. In particular, the downwind wind turbines are considered here as their tower shadow effects are mo…
View article: Hybrid wind–photovoltaic–diesel–battery system sizing tool development using empirical approach, life-cycle cost and performance analysis: A case study in Scotland
Hybrid wind–photovoltaic–diesel–battery system sizing tool development using empirical approach, life-cycle cost and performance analysis: A case study in Scotland Open
The concept of off-grid hybrid wind energy system is financially attractive and more reliable than stand-alone power systems since it is based on more than one electricity generation source. One of the most expensive components in a stand-…
View article: Modelling, control and frequency domain analysis of a tidal current conversion system with onshore converters
Modelling, control and frequency domain analysis of a tidal current conversion system with onshore converters Open
To optimise a tidal energy conversion system, the operation, maintenance and power generation aspects have to be taken into account. As a result the key focus of this study is to propose and investigate an alternative method of implementin…
View article: Filter Design for Cable Overvoltage and Power Loss Minimization in a Tidal Energy System With Onshore Converters
Filter Design for Cable Overvoltage and Power Loss Minimization in a Tidal Energy System With Onshore Converters Open
By moving the back-to-back ac-dc-ac converters in a tidal current conversion system (TCCS) onshore, maintenance requirements and cost are reduced significantly. This is because underwater components are not easily accessible and operate in…