Research on Control Strategy of Unified Power Quality Conditioner Based on Improved Super-Twisting Sliding Mode Controller

• Published in: 2023 6th International Conference on Electronics Technology, ICET 2023
• Main Author: Chu Y.; Othman M.M.; Yu Y.; Huang J.
• Format: Conference paper
• Language: English
• Published: Institute of Electrical and Electronics Engineers Inc. 2023
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169927180&doi=10.1109%2fICET58434.2023.10211971&partnerID=40&md5=59dcae830287925976776dba7c2787f1

The unified power quality conditioner (UPQC) can effectively compensate the disturbance of electric energy. In order to improve the response and compensation accuracy of the power quality conditioner, a second-order sliding mode controller based on the super-twisting algorithm is designed for the current compensation unit to replace the PI controller. The operation process does not need to derivate and find the extreme value of the voltage. The Simulink module in Matlab software is used to verify the system, and the UPQC power system model of the parallel APF part with PI as the controller and the UPQC power system model of the parallel APF part with the super-twisting sliding mode as the controller are built. The comparative simulation results show that the current compensation unit is improved by the UPQC based on the super-twisting algorithm sliding mode controller in terms of current compensation response faster than the PI controller, the ripple in the DC output current and voltage response is lower, and the system is more stable. © 2023 IEEE.