Two-tier combined active and reactive power controls for VSC–HVDC-connected large-scale wind farm cluster based on ADMM

Sheng Huang, Yusheng Gong, Qiuwei Wu*, Fei Rong

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

To reduce the voltage fluctuations inside the wind farm cluster (WFC), a combined active and reactive power control schemes based on model predictive control is proposed. The aims of the proposed control scheme are to maintain the collector bus and wind turbine (WT) terminal voltages within the feasible range. With the size of WFC increasing, conventional centralised optimal control may no longer be suitable for a large-scale WFC due to the high computation burden of the WFC central controller. To improve the calculation efficiency and protect information privacy, a two-tier control structure with alternating direction method of multipliers (ADMMs) algorithm is used to solve the large-scale optimisation problem in distributed/hierarchical manner. In the upper-tier distributed control, the active and reactive power outputs of the WFs are coordinated to enhance the voltage control performance. In the lower-tier control, an ADMM-based hierarchical control is developed to minimise the voltage deviation of the WT terminals. Case studies demonstrate the efficacy of the proposed two-tier combined active and reactive power controls.

Original languageEnglish
JournalIET Renewable Power Generation
Volume14
Issue number8
Pages (from-to)1379-1386
ISSN1752-1416
DOIs
Publication statusPublished - 8 Jun 2020

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