Combining Second Order Central Difference Discretization with Extended Kalman Filter for Rotor Speed and Flux Estimation of a Doubly-fed Induction Generator

2018 ◽  
Author(s):  
Ahmad boussoufa ◽  
Madjid Kidouche
Keyword(s):  
Kalman Filter ◽  
Extended Kalman Filter ◽  
Second Order ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Rotor Speed ◽  
Central Difference ◽  
Flux Estimation ◽  
Doubly Fed ◽  
Difference Discretization

Steady State and Transient Analysis of Grid Connected Doubly Fed Induction Generator Under Different Operating Conditions

2017 ◽  
Vol 6 (3) ◽  
pp. 174
Author(s):  
Sukhwinder Singh Dhillon ◽  
Jagdeep Singh Lather ◽  
Sanjay Marwaha
Keyword(s):  
Steady State ◽  
Dynamic Response ◽  
Reference Frames ◽  
Reactive Power ◽  
Operating Conditions ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Rotor Speed ◽  
Doubly Fed ◽  
Matlab Programming

This paper present steady state and dynamic (Transient) models of the doubly fed induction generator connected to grid. The steady state model of the DFIAG (Doubly Fed Asynchronous induction Generator) has been constructed by referring all the rotor quantities to stator side. With the help of MATLAB programming simulation results are obtained to depict the steady state response of electromechanical torque, rotor speed, stator and rotor currents, stator and rotor fluxes, active and reactive drawn and delivered by Doubly fed Asynchronous Induction machine (DFAIM) as it is operating in two modes i.e. generator and motor. The mathematical steady state and transient model of the DFIAM is constructed for three basic reference frames such as rotor, stator and synchronously revolving reference frame using first order deferential equations. The effect of unsaturated and saturated resultant flux on the mutual inductance is also taken into account to deeply understand the dynamic response of the machine. The steady state and dynamic response of the DFAIG are compared for different rotor voltage magnitudes. Also, the effect of variations in mechanical input torque, stator voltage variations are simulated to predict the stator and rotor currents, active and reactive power, electromagnetic torque and rotor speed variations.

scholarly journals Oscillation Damping for Wind Energy Conversion System with Doubly Fed Induction Generator Association with Synchronous Generator

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5067
Author(s):  
Farag K. Abo-Elyousr ◽  
Hossam S. Abbas ◽  
Ali M. Yousef ◽  
Nguyen Vu Quynh ◽  
Ziad M. Ali ◽  
...  
Keyword(s):  
Power System ◽  
Energy Conversion ◽  
Synchronous Generator ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Rotor Speed ◽  
Linear Quadratic ◽  
Interconnected Power System ◽  
Wind Energy Conversion ◽  
Doubly Fed

The main purpose of this paper is to enhance the operation of renewable wind energy conversion (WEC) systems connected to power systems. To achieve this, we consider a linear quadratic Gaussian (LQG) control approach for regulating the effects of a WEC system with doubly fed induction generator (DFIG) on the synchronous generator (SG) rotor speed of the interconnected power system. First, we present the mathematical formulation of the interconnected power system comprises a single synchronous generator and a wind turbine with DFIG connected to an infinite bus bar system through a transmission line. We consider that the system is operated under various loading conditions and parameters variation. Second, a frequency damping oscillation observer is designed via Kalman filtering together with an optimal linear quadratic regulator to mitigate the impacts of the WEC system on the SG rotor speed. The performance of the developed interconnected power system is simulated using a MATLAB/SIMULINK environment to verify the effectiveness of the developed controller. In comparison with previously reported results, the proposed approach can stabilize the interconnected power system within 1.28 s compared to 1.3 s without the DFIG.

scholarly journals Rotor Speed and Flux Estimation of a Doubly-fed Induction Machine Using Extended Kalman Filter

2017 ◽  
Vol 2 (4) ◽  
pp. 266-273
Author(s):  
Ahmad Boussoufa ◽  
Madjid Kidouche ◽  
Aimad Ahriche
Keyword(s):  
Induction Machine ◽  
Doubly Fed Induction Generator ◽  
Power Network ◽  
Rotor Speed ◽  
Extended Kalman Filtering ◽  
Filtering Method ◽  
Ac Power ◽  
Doubly Fed Induction Machine ◽  
Flux Estimation ◽  
Doubly Fed

This paper uses Extended Kalman Filtering method (EKF) to estimate the rotor speed and flux of a Doubly-fed Induction Generator (DFIG) to be used in Wind Turbines (WTs). DFIGs are widely used in WTs because they can generate an electric power of constant voltage amplitude and frequency which allow a direct connection between the WTs and the ac power network. A DFIG modeling in the (dq) reference frame is presented and a brief description of EKF algorithm is described to estimate the rotor speed and flux. Simulations results are shown and discussed.

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