Abstract
The conversion efficiency of the wind turbine in partial load operation can be maximized if it operates at the optimal tip speed ratio and the optimal pitch angle, thus the optimal power coefficient. For this purpose, the wind turbine rotor must track an optimal reference speed. In this work, a nonlinear closed-loop finite horizon optimal tracking via state dependent Riccati equation (SDRE) is applied to track the optimal reference rotor speed of a permanent magnet synchronous generator based wind energy conversion system. The key idea in this technique is to use an approximate analytic approach to convert the state dependent differential Riccati equation (SD-DRE) into the linear differential Lyapunov equation which can be solved in a closed form at each time step of a given time period. In addition, a state dependent vector differential equation is solved simultaneously with SD-DRE at each time step to perform the optimal tracking problem.
Original language | English (US) |
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Title of host publication | 51st North American Power Symposium, NAPS 2019 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781728104072 |
DOIs | |
State | Published - Oct 2019 |
Event | 51st North American Power Symposium, NAPS 2019 - Wichita, United States Duration: Oct 13 2019 → Oct 15 2019 |
Publication series
Name | 51st North American Power Symposium, NAPS 2019 |
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Conference
Conference | 51st North American Power Symposium, NAPS 2019 |
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Country/Territory | United States |
City | Wichita |
Period | 10/13/19 → 10/15/19 |
Bibliographical note
Publisher Copyright:© 2019 IEEE.
Keywords
- Finite horizon tracking
- nonlinear optimal control
- partial load region
- state dependent Riccati equation
- wind energy conversion system