Robust damping and decoupling controller for interconnected power network based on distributed energy resources

被引:3
作者
Ahmed, Mohamed [1 ]
Alsokhiry, F. [2 ]
Ahmed, Khaled H. [3 ]
Abdel-Khalik, Ayman Samy [4 ]
Al-Turki, Y. [2 ]
机构
[1] Alexandria Univ, Dept Engn Math & Phys, Alexandria 21544, Egypt
[2] King Abdulaziz Univ, Dept Elect Engn, Jeddah 21589, Saudi Arabia
[3] Strathclyde Univ, Dept Elect & Elect Engn, Glasgow G1 1XQ, Scotland
[4] Alexandria Univ, Dept Elect Engn, Alexandria 21544, Egypt
关键词
Grid-forming converters; Converter dominated network; Weak grid; Decoupling controller; Pattern search; PHASE-LOCKED-LOOP; STABILITY; CONVERTERS;
D O I
10.1016/j.ijepes.2022.108581
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Converter based distributed energy resource (DER) units are intended to be integrated into the power system using grid-forming converters (GFCs). It proposes to emulate the synchronous machines dynamics and forms the grid voltage/frequency by instantaneously balance the load changes without peer-to-peer coordination. How-ever, the damping and coupling characteristics of GFCs in multi-vendor interoperability-based network have not yet been fully explored. The paper proposes a step-by-step analytic method based on participation factor analysis to efficiently analyze the oscillatory modes and the coupling characteristics in the GFCs-based network, espe-cially where the GFCs are controlled by different control techniques. Moreover, to efficiently damp these oscillatory modes and such control coupling, a hybrid damping method based on an oscillation damper and a decoupling controller is proposed. A mathematical modelling is derived to confirm the role of the proposed decoupling controller especially during transient periods. Design guidelines using pattern search algorithm are presented to identify the optimum parameters of the proposed hybrid damping method. Finally, the experimental results using Controller-hardware-in-the-loop (CHiL) verify the theoretical analysis and the efficient damping against large disturbances. (C) 2017 Elsevier Inc. All rights reserved.
引用
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页数:16
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