Enhancing Efficiency of DC-based DFIG Wind Turbines in Bipolar Micro-Grid Environments with Real-Time Validation

Meriem Ghodbane-Cherif, Marwa Ben Saïd-Romdhane, Sondes Skander-Mustapha, Ilhem Slama-Belkhodja

Abstract


This article introduces an improved regulation strategy for DC wind power systems linked to an imbalanced bipolar DC micro-grid. The study focuses on two distinct wind systems, each one connected to a separate terminal of the bipolar DC micro-grid and tested with varying wind speed profiles. The investigated wind systems are based on doubly fed induction generators with two voltage source converters: a rotor-side converter and a stator-side converter. The first one converter ensures the Maximum Power Point Tracking, while the second converter maintains balanced three-phase voltages on the stator side. Both converters employ predictive control algorithms. Simulations conducted using PSIM software prove the efficacy of the suggested control strategy in mitigating the impact of bipolar DC micro-grid imbalances on DC wind turbine efficiency. The system demonstrates performance even under challenging conditions, with DC bus variations reaching up to 50 %. To verify the system’s precision and rapid dynamic response, the suggested control is compared with conventional resonant control through real-time simulations. A comparative analysis of the results demonstrates the superior suggested control efficiency for the studied system.


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DOI (PDF): https://doi.org/10.20508/ijrer.v16i2.15295.g9214

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