Enhanced Voltage Drop Compensation in Wind-Driven Microgrids Using a Hybrid Dual-Vector Controller and SSSC

Abstract

Power quality (PQ) in electric power systems is critical for ensuring the reliable delivery of electricity to consumers, encompassing aspects such as signal stability, voltage variations, and other key parameters. One of the most significant challenges to maintaining high PQ is voltage drop, which can severely affect sensitive loads and disrupt the overall system performance. Numerous studies have investigated the use of electronic devices to address these issues, yet there remains a need for more effective solutions. This paper introduces a novel control methodology that leverages a hybrid dual-vector controller (DVC) integrated with a Series Static Synchronous Compensator (SSSC) to mitigate voltage drops in distributed generation (DG) systems, particularly those involving wind turbine (WT) units within a microgrid (MG) environment. The proposed control strategy operates within the d-q synchronous reference frame, incorporating both an external voltage control loop and an internal current control loop. By dynamically comparing the load voltage against a reference value derived from the WT signal, the controller optimally adjusts the SSSC switches to compensate for voltage variations. Extensive simulations were conducted on a 13-bus IEEE standard distribution network using MATLAB software (R2021b). The results demonstrate the efficacy of the proposed compensation technique in significantly enhancing voltage stability and overall PQ within the desired operational range. This study not only advances the understanding of DVC applications in microgrids but also provides a robust solution for improving the reliability of DG systems under varying operational conditions.

Keywords

• Compensation
• series static synchronous compensation
• voltage sag
• PQ
• DG
• wind turbines