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Abstract:   (140 Views)
This paper proposes a new method for direct control of active power and stator flux of permanent magnet synchronous generator (PMSG) used in the wind power generation system. Active power and stator flux are controlled by the proposed discrete time algorithm. Despite the commonly used vector control methods, there is no need for inner current control loops. To decrease the errors between reference and measured values of active power and stator flux, the space vector modulation (SVM) is used, which results in a constant switching frequency. Compared to vector control, the proposed direct control method has advantages such as higher dynamic response due to elimination of inner current control loops and no need to coordinate system transformation blocks as well as the PI controllers and their adjustment. Moreover, permanent magnet flux vector and several machine parameters such as stator inductances are not required which can improve the robustness of the control system. The proposed method can be used in both types of surface-mounted and interior PMSGs. The effectiveness of the proposed method in comparison to vector control method with optimized PI coefficients by the particle swarm algorithm is evaluated. Simulation results performed in MATLAB/Simulink software show that higher dynamic response with lower active power and the stator flux ripple are achieved with the proposed method.
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  • Proposing a novel method base on load angle for direct control of active power and stator flux of PMSG-based wind turbine.
  • Control of active power and stator flux by the proposed discrete-time algorithm.
  • Higher dynamic response due to the elimination of inner current control loops and no need to coordinate system transformation blocks as well as the PI controllers and their adjustment.
  • No need to permanent magnet flux vector and several machine parameters such as stator inductances which can improve the robustness of the control system.

Type of Study: Research Paper | Subject: Wind
Received: 2019/11/30 | Revised: 2020/07/20 | Accepted: 2020/07/27

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© 2020 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.