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PhD Cost-Effective Generator & MVDC Integration for Wind Farms

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  • Full or part time
    Dr Agusti Egea
  • Application Deadline
    No more applications being accepted
  • Funded PhD Project (UK Students Only)
    Funded PhD Project (UK Students Only)

Project Description

A 48 month fully-funded industrial PhD studentship to investigate new DC collection systems for wind farms & new turbine drive train technologies to minimise capital and maintenance costs, and increase system reliability and efficiency. Sponsored by Siemens Gamesa Renewable Energy & Offshore Renewable Energy Catapult.

Project Details

One of the main drivers in wind technology is the reduction of the project cost (CAPEX) and the operation of maintenance cost (O&M). The wind turbine collection system is gaining attention as a potential cost saver infrastructure. Different alternatives have been suggested: DC parallel connection, DC series connection and low AC frequency collection systems. Some researchers have suggested that DC collection systems for wind farms might present reduced running cost compared to the standard AC technology, but it is highly dependent on the used DC converter technology. With the main focus on enabling DC technologies in the power generation industry impacting the energy costs (LCoE), the classical wind farm electrical power train topologies will be reviewed and optimized to deliver the best trade-off cost-efficiency-reliability. The wind turbine drive train can be redesign considering non-conventional technologies such as a geared wind turbine with wounded rotor synchronous machines connected to a diode rectifier. At the same time, the integration of energy storage systems and another source of generation such solar can reduce even further the total cost and simplify the system operation.

This PhD proposal aims to investigate a new integrated DC collection system and wind turbine drivetrain technology that might improve the wind farm efficiency and reduce the wind farm construction and operational cost. In the proposed concept, the AC collection system is replaced by a DC system where the AC network is interfaced by a multilevel converter ensuring low harmonics emissions and grid compliance in any scenario. Different electrical power-train topologies of the wind turbines are analysed and evaluated on the basis of DC collector systems, selecting the best cost-efficient topologies for further investigation. Apart from the wind turbines, different elements like photovoltaic generation systems and energy storage elements can be added to the collector system enabling the provision of ancillary services such as inertia emulation and frequency support, without disturbing the turbine operation. This scheme is in the early development stages and requires further research regarding the wind turbine and converter topologies, control, protection and stability perspective. During the PhD a prototype of the studied system is expected to be built.

During the PhD the student will do some fully funded secondments with the industrial partners.

The standard EPSRC monthly stipend will be complemented with a generous industrial contribution.


The main PhD supervisor will be Dr Agusti Egea-Alvarez together with SGRE and OREC industrial supervisors.

Dr Agustí Egea-Àlvarez is Strathclyde Chancellor’s Fellow (Lecturer) at the electronic & electrical engineering department and member of the PEDEC (Power Electronics, Drives and Energy Conversion) group. He obtained his BSc, MSc and PhD from the Technical University of Catalonia in Barcelona in 2008, 2010 and 2014 respectively. In 2015 he was a Marie Curie fellow in the China Electric Power Research Institute (CEPRI). In 2016 he joined Siemens Gamesa as converter control engineer working on grid forming controllers and alternative HVDC schemes for offshore wind farms. He is a member of IEEE, IET and has been involved in several CIGRE working groups.

How to apply


Candidates interested in applying should first email [Email Address Removed] for an informal discussion. In the same email the candidates should submit their CV, academic transcript, and a cover letter outlining their suitability for the position. Following review of the application submissions, selected candidates will be called for interview.

Funding Notes

This PhD studentship follows the standard EPSRC residency and academic qualification criteria:

- Ordinary resident in the UK for at least 3 years prior to the start of the studentship.
- Upper second class UK honours degree in Electrical Engineering, Power Systems, Renewable Energy, Energy Systems, Mechanical Engineering or a combination of qualifications and/or experience equivalent to that level.

More information can be found at

How good is research at University of Strathclyde in Electrical and Electronic Engineering, Metallurgy and Materials?

FTE Category A staff submitted: 59.20

Research output data provided by the Research Excellence Framework (REF)

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