PROJECT TITLE: Control in Power Electronics for Next-Generation High-Reliability Photovoltaic Systems
PhD period: 2017.01.01 – 2019.12.31.
Section: Power Electronic Systems
Research Programmes: Efficient and Reliable Power Electronics and Photovoltaic Systems
Supervisor: Frede Blaabjerg
Co-Supervisors: Yongheng Yang and Dezso Sera
Collaborator: University of Cyprus.
Funding: PV2GRID, APETT, Department of Energy Technology.
Power electronics technology is the key to a high-penetration level of grid-connected Photovoltaic (PV) systems. Advancing the control of power electronics in PV systems can ensure a grid-friendly integration of the PV energy into the grids. This can fulfill the flexible power control requirements and minimize the adverse impacts of solar PV power fluctuation, allowing integrating more PV systems. Moreover, enhancing the control of power electronics converters may also improve the reliability and the lifetime of PV inverters. This will lead to a reduction in the repair and maintenance cost during operation, since the PV inverter is one of the most critical components of the entire system. As a result, the cost of PV energy can be reduced and the competitiveness of solar PV energy can be further increased.
From the above demands, this Ph.D. project aims to advance the control in power electronics for next-generation PV system, where flexible control functionalities and high-reliability are demanded. Several flexible power control solutions such as power limiting control, power ramp-rate control, and power reserve control will be addressed. Then, the reliability assessment of PV systems with the developed control strategies will be carried out. Notably, the energy storage systems are also taken into consideration to assist the PV system in meeting the above demands. Coordination schemes between the deployment of energy storage devices and the advanced control functionalities of PV system can optimize the energy yield from the PV and also enhance PV inverter lifetime. The research activities are summarized in the following diagram:
The expected outcomes of this Ph.D. project are:
Flexible power control strategies for the next-generation grid-friendly PV systems;
Improvement in the reliability of PV system with extended PV inverter lifetime;
Optimal solutions to combine the energy storage system with the advanced power generation control of the PV system to minimize the levelized cost of energy.
Publications in journals and conference papers may be found at VBN.