Sizing a Hybrid Energy Storage System for Maintaining Power Balance of an Isolated System with High Penetration of Wind Generation

Yi Liu, Wenjuan Du, Liye Xiao, Haifeng Wang, Siqi Bu, Jun Cao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

123 Citations (Scopus)


A frequency-based approach is proposed in this paper to size a battery-supercapacitor energy storage system for maintaining power balance of an isolated system with high penetration of wind generation, thus to maintain the grid frequency stability with the stochastic wind power fluctuations being considered. The sizing method proposed makes full use of the combined technical merits of two types of energy storage systems, battery and supercapacitor, as their specific power/energy densities and the corresponding expected life cycle cost/year are different. The power imbalance between hourly dispatched wind power and the corresponding actual real-time wind power output is decomposed into different time-varying periodic components by use of the Fourier transformation. Then two different types of energy storage systems are applied to balance the low-frequency and intermediate-frequency component respectively. A computational procedure is developed in the paper for choosing the optimal cut-off frequencies in determining the range of low and intermediate frequency for sizing the hybrid energy storage system. Comparative studies of a real isolated system in China are presented in the paper to demonstrate the effectiveness of the proposed method.
Original languageEnglish
Article number7298473
Pages (from-to)3267-3275
Number of pages9
JournalIEEE Transactions on Power Systems
Issue number4
Publication statusPublished - 1 Jul 2016
Externally publishedYes


  • Battery energy storage system
  • energy storage system
  • Fourier transformation
  • frequency deviation
  • power dispatch
  • supercapacitor energy storage system
  • wind power

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Sizing a Hybrid Energy Storage System for Maintaining Power Balance of an Isolated System with High Penetration of Wind Generation'. Together they form a unique fingerprint.

Cite this