Robust, coordinated control of SSO in windintegrated power system

Tong Wang, Jing Yang, Malhar Padhee, Jingtian Bi, Anamitra Pal, Zengping Wang

Research output: Contribution to journalArticle

Abstract

This study presents a robust, coordinated control methodology for damping sub-synchronous oscillations (SSOs) while considering power output variations from multiple wind farms. The proposed damping control strategy utilises the mixed H2/H∞ control with regional pole placement to suppress the oscillations. For ensuring applicability over a wider operating range, the convex polytopic theory is utilised by using different operating points as the vertices of a convex polytope. The centralised, coordinated controller for damping SSOs is designed using linear matrix inequalities. Furthermore, unmeasurable state variables, if present, are represented by corresponding output variables. The damping signal is implemented as active power and reactive power modulation of the rotor-side converter of the doubly fed induction generators. A 4-machine, 2-area system and a 39-machine New England system are used to demonstrate the performance of the proposed control. The simulation results show that the polytopic controller can not only provide requisite damping to the SSO modes of interest, but also has good control performance when the wind power outputs change over a wide range.

Original languageEnglish (US)
Pages (from-to)1031-1043
Number of pages13
JournalIET Renewable Power Generation
Volume14
Issue number6
DOIs
StatePublished - Apr 27 2020
Externally publishedYes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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