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He, Jinkui

He, Jinkui

PROJECT TITLE: Towards 1500-V DC-link PV Power Converters: Design and Control for Efficiency and Reliability

PhD period: 2018.12.15 – 2021.12.14.
Section: Power Electronic Systems
Research Programmes: Photovoltaic Systems and Efficient and Reliable Power Electronics 
Supervisor: Yongheng Yang
Co-Supervisors: Francesco Iannuzzo and Ariya Sangwongwanich
Contact Information

Collaborator: To be announced later. 
Funding: Self-financing and China University of Petroleum-East China.


Solar photovoltaic (PV) energy is becoming one of the essential sources in today's power grid. More PV systems are expected to be installed in the future and will share a major part of the power production. In PV systems, power converters are the key to the efficient and reliable conversion. In order to reduce the losses and investment cost of PV systems, currently, the DC-link of PV power converters increases to 1500-V, and a few commercial products are already available on market (e.g., Semikron, Sungrow, and Huaiwei). In this case, the PV inverters are moving toward multilevel configurations in order to accommodate the 1500-V DC-links. Moreover, the design and control of such systems may be retrofitted completely in order to maintain high efficiency and high reliability.

Thus, this PhD project will focus on the design and control of 1500-V PV power converters, with the focus on efficiency and reliability. The project is dedicated to address the challenges in three major aspects: 1) Optimal design of 1500-V power converters, 2) Control strategies to enable grid-friendly integration of PV energy, and 3) Novel power converters to accommodate the high DC-link. Topological innovations and also advanced control strategies are expected in this project to improve the efficiency and reliability of PV inverters, and thus, reduce the cost of energy.


Publications in journals and conference papers may be found at VBN.