Distributed Control Strategy of the Leader-Follower for Offshore Wind Farms under Fault Conditions
Abstract
:1. Introduction
2. Model and Theoretical Foundation
2.1. Single-Machine Hamiltonian Realization of Doubly Fed Wind Turbine
2.2. Conceptions of Graph Theory
- represents the unidirectional neighbor node of the node;
- represents the bidirectional neighbor node of the node;
- represents the potential neighbor node of the node.
3. Leader-Follower Distributed Control Strategy
3.1. Control Strategy of Leader
3.2. Control Strategy of the Follower Unit
3.3. Analysis of the Control Strategy under Fault Conditions
4. Leader-Follower Distributed Control Strategy under a Communication Fault Condition
5. Simulation Verification
5.1. The Leader-Follower Control Strategy under Follower Unit Fault
5.2. The Leader-Follower Control Strategy under a Leader Unit Fault
5.3. The Leader-Follower Control Strategy under a Communication Failure
6. Conclusions
Author Contributions
Funding
Conflicts of Interest
Appendix A. List of Symbols
,, | stator, rotor, and generated current |
, | stator and rotor voltage |
, | stator side converter voltage and current |
, | transformer reactance |
rotor resistance | |
synchronous angle speed | |
mutual inductance | |
, | stator and rotor inductance |
rotor slip rate | |
, | dq-axis stator current |
, | stator transient or short circuit reactance and open circuit reactance |
, | dq-axis transient reactance voltages |
, | dq-axis rotor voltage |
inertia constant | |
mechanical power | |
stator active power | |
stator reactive power |
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Wang, B.; Tang, Z.; Gao, X.; Liu, W.; Chen, X. Distributed Control Strategy of the Leader-Follower for Offshore Wind Farms under Fault Conditions. Sustainability 2019, 11, 2290. https://doi.org/10.3390/su11082290
Wang B, Tang Z, Gao X, Liu W, Chen X. Distributed Control Strategy of the Leader-Follower for Offshore Wind Farms under Fault Conditions. Sustainability. 2019; 11(8):2290. https://doi.org/10.3390/su11082290
Chicago/Turabian StyleWang, Bing, Zhen Tang, Xiang Gao, Weiyang Liu, and Xianhui Chen. 2019. "Distributed Control Strategy of the Leader-Follower for Offshore Wind Farms under Fault Conditions" Sustainability 11, no. 8: 2290. https://doi.org/10.3390/su11082290