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ANFIS-PI Controller based Coordinated Control Scheme of Variable Speed PMSG based WECS to Improve LVRT Capability of Wind Farm Comprising Fixed Speed SCIG based WECS

Affiliations

  • Department of Electrical Engineering, Government Engineering College, Rajkot-360005, Gujarat, India
  • Department of Electrical Engineering, Sardar Vallabhbhai Patel Institute of Technology, Vasad-388306, Gujarat, India

Abstract


Objective: This paper proposes a novel ANFIS-PI controller based coordinated control scheme of VS-PMSG based WECS, located in close proximity of FS-SCIG based WECS; for improving LVRT capability of FSIG based WF. Methods/Statistical Analysis: Conventional PI controller based coordinated control scheme is simple and gives a good performance. But, with changing parameters of the grid, especially at the time of grid disturbance; the conventional PI controller cannot effectively control the system. To perform this online returning of parameters, a novel ANFIS-PI controller based coordinated control scheme is proposed here; which dynamically changes the controller parameters in accordance with the change in power system impedance during grid disturbance. Findings: MATLAB simulations are performed to check the effectiveness of the proposed ANFIS-PI controller based coordinated control scheme on a typical arrangement of two MW-size WFs connected to an infinite bus. It has been observed that at the time of grid disturbance, the reactive power requirement of the FSSCIG based WECS is effectively controlled by the ANFIS-PI controller based coordinated control scheme of VS-PMSG based WECS. Simulation results exhibit the improvement in LVRT capability of the whole wind farm, comprising VS-PMSG based WECS with FS-SCIG based WECS. Results of the ANFIS-PI controller based coordinated control scheme are compared with the conventional PI controller based coordinated control scheme. Wherein, results with ANFIS-PI controller are proven better than the results with conventional PI controller. The proposed approach for improving LVRT capability of FS-SCIG based WECS seems to be a cost effective, as it need not have any additional installation of FACTS devices. Application/ Improvements: The largely installed FS-SCIG based WECS could be made LVRT capable by the proposed method. The prototype model of the proposed simulation work is the future scope of research.

Keywords

Adaptive Neuro-Fuzzy Inference System, Coordinated Control Scheme, Low Voltage Ride Through, Wind Farm.

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