2020-04-13T18:26:02+08:002019-12-05|News&Events, Events|

The University Lecture on “Fast Dynamic Control – Applications of Power Quality Conditioning and PV MPP Tracking” will take place as follows:

Date: 11 Dec 2019 (Wednesday)

Time: 11:30-12:30

Venue: N21-G013, Lecture Hall, Research Building, University of Macau


The speaker is:

Dr. Carl Ho (何艺文博士), Associate Professor and Canada Research Chair, University of Manitoba, Canada


The Lecture is:

Fast Dynamic Control – Applications of Power Quality Conditioning and PV MPP Tracking



Fast dynamic response is one of key features which are required in modern power electronics applications. Conventionally, control bandwidth of Proportional–Integral (PI) controllers is limited by the process of “integral”, therefore dynamic response is also limited. Boundary control techniques with nonlinear switching surface have been proposed to be alternatives to pulsewidth-modulated (PWM) control strategies in power electronics converters.  It addresses the complete operation of a converter and does not differentiate startup, transient, and steady-state periods. The controller is based on operating model of converter, in order words: switching trajectory, to make switching decisions to guide the converter operating around the desired operating point. Ideally, a system with boundary controller can return to steady-state within two switching actions after a transient. The control strategy is promising for modern power system applications to deal with disturbance.

This presentation gives the fundamental concept of Boundary Control with second-order switching surface. And two applications of the control strategy are provided,

1.  Power Quality (PQ) Conditioning – by using the control strategy, fast dynamic response dynamic voltage restorers (DVR) are designed and implemented to deal with the PQ issues, including voltage sags, swells, harmonics and flickers.

2. Photovoltaic (PV) Maximum Power Point (MPP) Tracking – by using the control strategy, MPP trackers can locate a new MPP in a very short period of time to maximize renewable energy harvesting.

Performance of PQ conditioners and PV MPP trackers have been experimentally evaluated. The measured transient times were within the range of micro-second. The results will be shown and discussed in the seminar.



Dr. Carl Ho received the BEng and MEng double degrees, in 2002, and the PhD degree, in 2007, in electronic engineering from the City University of Hong Kong. He was involved in research on the development of dynamic power quality conditioning technology during his Ph.D degree. In 2007, he joined ABB Switzerland. He has been appointed as R&D Principal Engineer for PV Inverter and UPS products. He has led a research project team at ABB Switzerland to develop Solar Inverter technologies for three years. In October 2014, he joined the University of Manitoba in Canada where he is currently an Associate Professor and Canada Research Chair in Efficient Utilization of Electric Power. He established the Renewable-energy Interface and Grid Automation Lab (RIGA Lab) at the University of Manitoba and takes up the challenge of research into Microgrid technologies, Photovoltaic Inverters, Power-Hardware-in-the-loop, and Power Quality Conditioning. Dr. Ho is currently an IEEE Senior Member and an Associate Editor of the IEEE Transactions on Power Electronics (TPEL) and the IEEE Journal of Emerging and Selected Topics in Power Electronics (JESTPE). He received the “Best JESTPE Associate Editor Award in 2018” and “A Second Place Prize Paper Award for 2018” in the TPEL. And his leading graduate student team received the “Best Student Team Regional Award” in the Americas at the 2019 IEEE Empower a Billion Lives (EBL) competition.

For more details, kindly find the event poster, abstract and bio.