Article Dans Une Revue Journal of Energy Storage Année : 2025

Adaptive fuzzy direct flux-vector control for stand-alone DFIG-AC systems improving voltage/frequency stability with battery storage

Résumé

This paper proposes performances improvement of Direct Flux-Vector Control (DFC) applied to stand-alone Doubly Fed Induction Generator (DFIG). In a stand-alone AC power supply application, magnitude and frequency of the generated voltage need to be carefully monitored. With the DFC method, two closed loops are used to regulate the amplitude/frequency of the stator voltage via the amplitude/angle of the rotor flux, respectively. In this strategy, no position sensor or reference frame rotation are required, since it is carried out within the reference framework linked to the rotor. In addition, the rotor flux vector is adjusted by a direct selection of an appropriate voltage vector, making control structure implementation simple and easy. However, the DFC suffers from significant steady-state oscillations due to the presence of hysteresis regulators. To remedy this problem, a fuzzy inference control is introduced to enhance the efficiency of conventional DFC control by eliminating the hysteresis controllers and classical switching table. Indeed, intelligent identification of the proper voltage vector by the fuzzy DFC (F-DFC) seems to be a good solution for mitigating large ripples in rotor flux amplitude and angle. Furthermore, a fuzzy direct power control (F-DPC) is used to reduce active/reactive power ripples produced by the load-side converter. To ensure better power stability and improve energy management, a battery storage system is integrated, allowing compensation of power imbalances caused by wind speed and load variations. The effectiveness of the proposed control system is evaluated by multiple simulation tests performed with Matlab/Simulink software. The obtained results attest the capability of the suggested control structure to effectively regulate stator voltage amplitude and frequency under load and wind speed variation. Moreover, the findings confirm the superiority of the proposed F-DFC and F-DPC methods in terms of ripples minimization compared to C-DFC and C-DPC, respectively. To check the experimental feasibility of the recommended control technique, a real-time simulation is executed on the OP4510 system. The obtained experimental results validate those found by simulation and attest to the feasibility of the proposed F-DFC/F-DPC techniques for off-grid wind systems based on DFIG.

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Dates et versions

hal-05339541 , version 1 (30-10-2025)

Identifiants

Citer

Oualid Djoudi, Sofia Lalouni Belaid, Salah Tamalouzt, Djamel Ziane, Azeddine Houari, et al.. Adaptive fuzzy direct flux-vector control for stand-alone DFIG-AC systems improving voltage/frequency stability with battery storage. Journal of Energy Storage, 2025, 125, ⟨10.1016/j.est.2025.116983⟩. ⟨hal-05339541⟩
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