Research

My research interests encompass modeling and control of power electronics systems, battery energy storage system, microgrid, high-frequency power converter and data center power system.

Author

Bo Wen

Published

2024-04-10

My Featured Publications

AC Stability Analysis and dq Frame Impedance Specifications in Power-Electronics-Based Distributed Power Systems

This paper shows that for a three-phase power-electronics-based distributed power system, impedance matrices of subsystems can be designed as diagonal dominant. Therefore, the ac system can then be treated as two decoupled dc systems. As a result, load system impedance specification criteria developed for dc systems can be readily applied to ensure stability in ac systems.

Analysis of D-Q Small-Signal Impedance of Grid-Tied Inverters

This paper unveils an interesting and important feature of three-phase grid-tied inverters - namely, that its q-q channel impedance behaves as a negative incremental resistor. An example shows that under weak grid conditions, a change of the PLL bandwidth could lead the inverter system to unstable conditions as a result of this behavior.

Impedance-Based Analysis of Grid-Synchronization Stability for Three-Phase Paralleled Converters

This paper shows the synchronization instability between inverter-based resouces due to the impedance interaction (or “controller interaction” used by other publications) caused by phase-locked loop regulator designs. This paper is a TPEL prize paper.

Small-Signal Stability Analysis of Three-Phase AC Systems in the Presence of Constant Power Loads Based on Measured d-q Frame Impedances

This paper investigates the small-signal stability of a balanced three-phase ac system using measured d-q frame impedances. The experimental results obtained validated the use of ac impedances as a valuable dynamic analysis tool for ac system integration, in perfect dualism with the dc case.