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Siti Khadijah Hamzah

Research Postgraduate – Electrical Power Node

Research Postgraduate – Electrical Power Node in the Department of Engineering


Siti Hamzah is in her 1st year of the PhD program in the Engineering department. She holds a Master’s in Electrical Power and Energy Systems (with Advanced Practice) from the University of Teesside, Middlesbrough and a Postgraduate Diploma in Offshore Wind Energy and the Environment from the University of Hull. Siti’s research is funded by the EPSRC. Her research interests are in integration and optimization of energy, to minimize the cost of power generation particularly in offshore wind farms. She is also a member of the Durham Energy Institute (DEI). She had 12 years working experience as Electrical Engineer in construction field in Malaysia. She has supervised a number of government and private-sector projects.

Research Project

Siti Hamzah project is to develop a method to control the optimal operation of substation converters (current source converter or voltage source converter) in a complex Multi-Terminal Direct Current system (MTDC). The system will link several offshore wind farms using a High Voltage Direct Current System (HVDC). The study will investigate numerical modelling based on optimization problems in the power system and then will be verified using real time digital simulation technologies (RTDS). In the electrical network systems, the optimization issues are related to Optimal Power Flow (OPF) and Security Constraint Optimal Power Flow (SCOPF). The OPF and SCOPF problems are nonconvex and nonlinear which is quite intricate especially in large scale systems.

The project will also involve implementation of a suitable day-ahead operational planning framework by solving multiple instances of OPF problem to plan the operation of offshore wind farms within a specific planning timescale (for example for 24 hours). The planning framework is then implemented to multiple wind farms connected via a multi-terminal HVDC “Supergrid” to provide better power regulation and a more stable, reliable operation even after emergencies such as loss of supply in a specific region. These added flexibilities of operation are necessary for sustainable growth and integration of offshore wind resource in the future for example in the UK in line with National Grid's Future Energy Scenarios (FES) projections.

Research interests

  • Energy