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Jun 19, 2026Keywords:
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Application of higher-order sliding mode and enhanced pi controllers for superior harmonics mitigation in power networks
Abstract
Due to varying system parameters and fluctuating load conditions of power systems, classical control schemes are ineffective for controlling active power filters (APF). As such, this study proposed a combined application of an enhanced proportional-integral (EPI) and a higher-order sliding mode (HOSM) controllers in shunt active power filters (SAPFs). The controllers are applied in the SAPF in two schemes to test the viability of the control strategy under fluctuating load conditions. The choice of the EPI and HOSM is informed by the controllers’ robustness to system parameter variations and external disturbances, which is crucial for SAPFs operating in dynamic load conditions. The results demonstrate that the adopted control strategy achieves good dynamic response, and a rapid voltage stabilization time of 0.1 seconds after 𝑡 > 0.4 seconds. Furthermore, the total harmonic distortion (THD) is significantly reduced in the two schemes meeting the requirement set by IEEE – 519 standards for power quality in electrical networks. These findings highlight the robustness and efficacy of applying the adopted strategy in enhancing the performance of APFs, offering a promising solution for advanced harmonic mitigation and stable voltage control in modern power systems. Future research should focus on optimizing the computational aspects of the control strategy for real-time applications and further validating its effectiveness across diverse operational environments.
