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Sustainability 2017, 9(8), 1448; doi:10.3390/su9081448

Distributed Coordinated Control of Offshore Doubly Fed Wind Turbine Groups Based on the Hamiltonian Energy Method

1
College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China
2
School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China
*
Author to whom correspondence should be addressed.
Received: 1 July 2017 / Revised: 9 August 2017 / Accepted: 10 August 2017 / Published: 16 August 2017
(This article belongs to the Section Energy Sustainability)
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Abstract

To support doubly fed wind turbine (DFWT) groups in offshore wind farms, this paper proposes a distributed coordinated control based on the Hamiltonian energy theory. This strategy provides global stability to closed-loop systems and facilitates output synchronization. First, a model of a DFWT is realized as a port-controlled Hamiltonian system with dissipation (PCH-D), and the single-machine model is expanded into a multi-machine model of a wind turbine group. Then, by using the design methodology of distributed Hamiltonian systems, a distributed coordinated control is presented for a multi-machine PCH-D system. Furthermore, to investigate failures in wind turbine groups, they are divided into two cases: the separation of failed machines from the system, and the grid-connected operation of failed machines after a fault. These cases correspond to undirected and directed graphs, respectively. Finally, simulations prove that distributed coordinated control enhances the reliability and autonomy of wind turbine groups in offshore wind farms. View Full-Text
Keywords: distributed coordinated control; doubly fed wind turbine (DFWT) group; port-controlled Hamiltonian system with dissipation (PCH-D); topological structure; offshore farm distributed coordinated control; doubly fed wind turbine (DFWT) group; port-controlled Hamiltonian system with dissipation (PCH-D); topological structure; offshore farm
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, B.; Wu, Q.; Tian, M.; Hu, Q. Distributed Coordinated Control of Offshore Doubly Fed Wind Turbine Groups Based on the Hamiltonian Energy Method. Sustainability 2017, 9, 1448.

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