Control of electrolyte flow rate for the vanadium redox flow battery by gain scheduling

Yifeng Li, Xinan Zhang, Jie Bao, Maria Skyllas-Kazacos

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

In this article, a gain scheduling approach is proposed to control the electrolyte flow rate for a VRB system. The flow rate is regulated to ensure that the open circuit voltage difference before and after cell stack tracks a given reference trajectory. The nonlinear process model is linearised around three different operating points with different state of charge. A set of PI controllers have been designed based on the linearised process model for both charging and discharging. To improve the control performance, a feedforward controller is designed to compensate the effect of current fluctuations. Simulation studies have been conducted under different operating conditions to demonstrate the performance of the proposed approach.

Original languageEnglish
Pages (from-to)125-133
Number of pages9
JournalJournal of Energy Storage
Volume14
DOIs
Publication statusPublished - 1 Dec 2017
Externally publishedYes

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