scholarly journals A Study About The Power Flow In Brushless Doubly Fed Asynchronous Generators For Wind Power Systems

2006 ◽  
Vol 11 (2) ◽  
pp. 85-92
Author(s):  
Hélio Voltolini ◽  
Renato Carlson ◽  
Fredemar Rüncos
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Power Flow ◽  
Wind Power Systems ◽  
Doubly Fed

A Novel Performance Enhancement Scheme for Doubly-Fed Induction Generator-Based Wind Power Systems under Voltage Sags and Swells

2017 ◽  
Vol 18 (4) ◽  
Author(s):  
Tapash Das ◽  
Jingxin Zhang ◽  
Hemanshu Pota
Keyword(s):  
Power Systems ◽  
Wind Power ◽  
Power Management ◽  
Reactive Power ◽  
Performance Enhancement ◽  
Protection System ◽  
Voltage Sags ◽  
Grid Voltage ◽  
Wind Power Systems ◽  
Doubly Fed

AbstractWind power is a major contributor in the renewable energy sector but it faces some issues regarding modern grid-code compliance. Popular wind power systems based on Doubly-Fed Induction Generators (DFIG) need additional protection under grid voltage disturbances. They also need to support the grid voltage under such transient occurrences. This paper presents a novel performance enhancement scheme for DFIGs subjected to symmetrical and asymmetrical voltage sags and swells at the Point of Common Coupling (PCC). The scheme comprises a protection system and a reactive power management system working simultaneously under the command of a supervisory control system. The protection system protects the DFIG converter by limiting the overcurrent in the Rotor Side Converter (RSC) of the DFIG and keeping the dc-link capacitor voltage within an acceptable range; whereas, the reactive power management supports the grid voltage by either injecting or absorbing reactive power to reduce the magnitude of voltage sags and swells. It is found that the performance of the DFIG wind generation system improves significantly under the proposed scheme. A grid-connected 9-MW DFIG wind farm is used for simulation in MATLAB/Simscape Power Systems.

scholarly journals Double-Fed Wind Power System Adaptive Sensing Control and Condition Monitoring

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jing Peng ◽  
Peng Yang ◽  
Zhiqi Liu
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Ferromagnetic Resonance ◽  
Inverse System ◽  
Control Technology ◽  
Adaptive Sensing ◽  
Wind Power Systems ◽  
Doubly Fed

This paper presents an in-depth study and analysis of improving the performance of doubly fed wind power systems using adaptive sensing control technology. The maximum wind energy tracking principle is analyzed in this paper with the wind turbine operation characteristics. Considering that the operation state and control strategy of a doubly fed wind power generation system is different before and after grid connection, the no-load simulation model and power generation simulation model are established based on the idea of separate modeling and time-sharing work. Combined with the respective control strategies and enabling modules, the overall simulation system is constituted for the continuous process from no-load operation to power generation operation. To analyze the chaotic mechanism of ferromagnetic resonance of wind farm power system and suppress the problem, based on the ferromagnetic resonance model of wind farm power system, analyze the basic conditions of the system into the chaotic state, consider the resonance phenomenon when external excitation acts, adopt the multiscale method to calculate the approximate solution at the resonance of main parameters and determine the steady-state solution and stability conditions, and explore the influence of external excitation on the dynamic characteristics of ferromagnetic resonance. In this paper, the inverse system approach, applied to the linearized decoupling of doubly fed wind power, a nonlinear, strongly coupled multivariable system, is derived for the no-load inverse system model and the inverse system model for the power control scheme and the speed control scheme to achieve maximum wind energy tracking for grid-connected power generation, respectively. The model further extended to fractional order to study the complex dynamical behavior of the system of different orders and flux chain subsquares. To suppress the system chaotic oscillation phenomenon, a fractional-order finite-time terminal sliding mode controller is proposed based on the frequency distribution model with time-frequency domain conversion, which achieves the suppression of chaotic phenomena in resonant overvoltage infinite time and is compared with the conventional sliding mode to confirm the effectiveness and superiority of the proposed controller. This paper explores and discusses the impact of adaptive sensing control technology on the practice of doubly fed wind power systems, to provide theoretical possibilities for the adaptive sensing control technology to be more effective for the practice of doubly fed wind power systems.

Nonlinear control of the doubly-fed induction generator in wind power systems

2010 ◽  
Vol 35 (8) ◽  
pp. 1662-1670 ◽  
Author(s):  
Orlando Soares ◽  
Henrique Gonçalves ◽  
António Martins ◽  
Adriano Carvalho
Keyword(s):  
Nonlinear Control ◽  
Power Systems ◽  
Wind Power ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Wind Power Systems ◽  
Doubly Fed
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