Coordinated Predictive Control of Offshore DC Collection Grid and Wind Turbines for Frequency Response: A Scheme Without Secondary Frequency Drop

被引:6
作者
Zhang, Zhihao [1 ]
Kou, Peng [1 ]
Zhang, Yuanhang [1 ]
Liang, Deliang [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Elect Engn, Shaanxi Key Lab Smart Grid, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
All-dc OWF; offshore dc-grid capacitors; frequency response; coordinated predictive control; secondary frequency drop; VSC-HVDC; FARM; INERTIA;
D O I
10.1109/TSTE.2023.3236721
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
From both technical and economical perspectives, all-dc offshore wind farm (OWF) is a trend for future offshore wind energy applications. Furthermore, in an all-dc OWF, both the capacitors in dc collection grid and offshore wind turbines have the potential for onshore grid frequency response. In light of this, this paper presents a model predictive control scheme, which coordinates the operation of offshore dc collection grid capacitors (dc-grid capacitors) and offshore wind turbines for the onshore frequency support. With this scheme, offshore dc-grid capacitors provide fast inertia support right after the frequency event, while offshore wind turbines provide primary frequency response for a longer period. A key feature of the proposed scheme lies in the ability to suppress the secondary frequency drop issue, which is caused by sudden power reduction of offshore dc-grid capacitors during the frequency recovery phase. An analytical framework is derived to validate this ability. Finally, simulation results verify the effectiveness of the proposed scheme.
引用
收藏
页码:1488 / 1503
页数:16
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