The colloquium of the Center for Intelligent Power and Energy Systems (CiPES) was held on Sep 25, 2020. This is a monthly event where we invite students and experts in the area of power and energy to give presentations about their research. Due to the pandemic, this is the first colloquium of CiPES in year 2020.

Today the presenter is Ms. Kang Yue from PSPAL. She gave a talk on her research: "Condition Monitoring of Power Electronic Systems". After the presentation, the audience discussed with the presenter about the details of her research.

Kang Yue received the Bachelor degree of Electrical Engineering and Automation from HeFei University of Technology, Hefei, China, in 2017. She is presently a Ph.D. student in Power System Protection and Automation Laboratory (PSPAL), SIST. Her research interests include health monitoring and parameter identification of power electronic systems.

The abstract of this talk is as follows:

In some sensitive power electronic circuits, any deviation of the components characteristics may affect system performances and the knowledge of all parameters is important to understand the circuit. As a result, condition monitoring of power electronic circuits is of increasing importance. Condition monitoring contains two aspects, fault diagnosis and parameter identification. This talk will introduce two works of condition monitoring, fault detection and coupling coefficient and load estimation in wireless power transfer systems. Fault detection generates a health indicator to represent the health condition of the entire power electronic circuit, and parametric faults are detected with any abnormality of the health indicator. The method only requires terminal measurements of the power electronic circuit, and does not have further assumptions on the topology of the circuit.

Coupling coefficient and load estimation method estimates the parameters with the derived relationship among the harmonics of the transmitter side input current, the coupling coefficient, and the load. The proposed method only requires transmitter side input current, can accurately estimate the coupling coefficient and the load at the same time, and can be applied to rather complex WPT topologies.