scholarly journals A comparison and an improvement of two continuous-time models for current-mode control

2003 ◽  
Author(s):  
B. Johansson
Keyword(s):  
Continuous Time ◽  
Current Mode ◽  
Current Mode Control ◽  
Mode Control ◽  
Continuous Time Models

THE UNIFIED MODEL FOR CURRENT-MODE CONTROL: AN ALTERNATIVE DERIVATION

2004 ◽  
Vol 13 (04) ◽  
pp. 725-736 ◽  
Author(s):  
SUNG-SOO HONG ◽  
BYUNGCHO CHOI ◽  
HYUN-SIK AHN
Keyword(s):  
Continuous Time ◽  
Current Mode ◽  
Unified Model ◽  
Small Signal ◽  
Continuous Time Model ◽  
Time Model ◽  
Current Mode Control ◽  
Mode Control ◽  
Domain Models ◽  
The Subject

The two prevalent s-domain models for current-mode control, the continuous-time model and the unified model, exhibit noticeable differences in their small-signal predictions and therefore have become the subject of comparisons and clarifications. The current letter presents an alternative way of deriving the unified model, thereby providing an additional guide for assessing the validity of the unified model. This letter also presents experimental data that support the accuracy of the unified model.

scholarly journals Nonlinear Current-Mode Control of SCIG Wind Turbines

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 55
Author(s):  
Nicholas Hawkins ◽  
Bhagyashri Bhagwat ◽  
Michael L. McIntyre
Keyword(s):  
Current Mode ◽  
Nonlinear Controller ◽  
Flux Observer ◽  
Current Mode Control ◽  
Mode Control ◽  
Squirrel Cage ◽  
Control Scheme ◽  
Control Schemes ◽  
Rotor Flux ◽  
Squirrel Cage Induction Generator

In this paper, a nonlinear controller is proposed to manage the rotational speed of a full-variable Squirrel Cage Induction Generator wind turbine. This control scheme improves upon tractional vector controllers by removing the need for a rotor flux observer. Additionally, the proposed controller manages the performance through turbulent wind conditions by accounting for unmeasurable wind torque dynamics. This model-based approach utilizes a current-based control in place of traditional voltage-mode control and is validated using a Lyapunov-based stability analysis. The proposed scheme is compared to a linear vector controller through simulation results. These results demonstrate that the proposed controller is far more robust to wind turbulence than traditional control schemes.

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