scholarly journals Voltage H∞ Control of a Vanadium Redox Flow Battery

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1567
Author(s):  
Alejandro Clemente ◽  
Germán Andrés Ramos ◽  
Ramon Costa-Castelló
Keyword(s):  
Large Scale ◽  
Great Accuracy ◽  
Operating Conditions ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Open Research ◽  
Wide Range ◽  
And Performance ◽  
Storage Technologies ◽  
Vanadium Redox

Redox flow batteries are one of the most relevant emerging large-scale energy storage technologies. Developing control methods for them is an open research topic; optimizing their operation is the main objective to be achieved. In this paper, a strategy that is based on regulating the output voltage is proposed. The proposed architecture reduces the number of required sensors. A rigorous design methodology that is based on linear H∞ synthesis is introduced. Finally, some simulations are presented in order to analyse the performance of the proposed control system. The results show that the obtained controller guaranties robust stability and performance, thus allowing the battery to operate over a wide range of operating conditions. Attending to the design specifications, the controlled voltage follows the reference with great accuracy and it quickly rejects the effect of sudden current changes.

Mathematic Modeling and Performance Analysis of Vanadium Redox Flow Battery

2020 ◽  
Vol 34 (8) ◽  
pp. 10142-10147
Author(s):  
Feng-Chang Gu ◽  
Hung-Cheng Chen ◽  
Kun-Yi Li
Keyword(s):  
Performance Analysis ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Mathematic Modeling ◽  
And Performance ◽  
Vanadium Redox

scholarly journals Novel Approaches for Solving the Capacity Fade Problem during Operation of a Vanadium Redox Flow Battery

Batteries ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 48 ◽  
Author(s):  
Arjun Bhattarai ◽  
Purna Ghimire ◽  
Adam Whitehead ◽  
Rüdiger Schweiss ◽  
Günther Scherer ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Large Scale ◽  
Vanadium Redox Flow Battery ◽  
Electrolyte Imbalance ◽  
Capacity Fade ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Safety Issues ◽  
Capacity Loss ◽  
Vanadium Redox

The vanadium redox flow battery (VRFB) is one of the most mature and commercially available electrochemical technologies for large-scale energy storage applications. The VRFB has unique advantages, such as separation of power and energy capacity, long lifetime (>20 years), stable performance under deep discharge cycling, few safety issues and easy recyclability. Despite these benefits, practical VRFB operation suffers from electrolyte imbalance, which is primarily due to the transfer of water and vanadium ions through the ion-exchange membranes. This can cause a cumulative capacity loss if the electrolytes are not rebalanced. In commercial systems, periodic complete or partial remixing of electrolyte is performed using a by-pass line. However, frequent mixing impacts the usable energy and requires extra hardware. To address this problem, research has focused on developing new membranes with higher selectivity and minimal crossover. In contrast, this study presents two alternative concepts to minimize capacity fade that would be of great practical benefit and are easy to implement: (1) introducing a hydraulic shunt between the electrolyte tanks and (2) having stacks containing both anion and cation exchange membranes. It will be shown that the hydraulic shunt is effective in passively resolving the continuous capacity loss without detrimentally influencing the energy efficiency. Similarly, the combination of anion and cation exchange membranes reduced the net electrolyte flux, reducing capacity loss. Both approaches work efficiently and passively to reduce capacity fade during operation of a flow battery system.

Conjugated Dynamic Modeling on Vanadium Redox Flow Battery With Non-Constant Variance for Renewable Power Plant Applications

2016 ◽  
Author(s):  
Abu Nayem Md. Asraf Siddiquee ◽  
Kwangkook Jeong
Keyword(s):  
Electric Circuit ◽  
Parametric Modeling ◽  
Operating Conditions ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Cell Ratio ◽  
Renewable Power ◽  
Constant Variance ◽  
Charging Time ◽  
Vanadium Redox

A parametric modeling study has been carried out to investigate the effect of change in operating conditions on VRFB performance. The objective of this research is to develop a computer program to predict the dynamic behavior of single cell VRFB combining fluid mechanics, reaction kinetics, and electric circuit. This paper deals with the exact solutions obtained by solving the governing differential equations of VRFB by using Maple 2015. Calculations were made under electrolyte concentrations of 1M–3M of V2+, charging-discharging current of 1.85A–3.85A, and tank to cell ratio of 5:1 to 10:1. Results show that the discharging time increases from 2.2 hours to 6.7 hours when the value of electrolytes concentration of V2+ increases from 1M to 3M. However, the charging time decreases from 6.9 hours to 3.3 hours with the increment of applied current from 1.85A to 3.85A. Additionally, when the tank to cell ratio is increased from 5:1 to 10:1, the charging-discharging time increased from 4.5 hours to 8.2 hours. Ampere-hour capacity of the cell was found to increase when molar concentration of vanadium and, tank to cell ratio were increased.

A Stable Vanadium Redox-Flow Battery with High Energy Density for Large-Scale Energy Storage

2011 ◽  
Vol 1 (3) ◽  
pp. 394-400 ◽  
Author(s):  
Liyu Li ◽  
Soowhan Kim ◽  
Wei Wang ◽  
M. Vijayakumar ◽  
Zimin Nie ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Large Scale ◽  
High Energy ◽  
Vanadium Redox Flow Battery ◽  
High Energy Density ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

Modeling a vanadium redox flow battery system for large scale applications

2013 ◽  
Vol 66 ◽  
pp. 26-32 ◽  
Author(s):  
Burak Turker ◽  
Sebastian Arroyo Klein ◽  
Eva-Maria Hammer ◽  
Bettina Lenz ◽  
Lidiya Komsiyska
Keyword(s):  
Large Scale ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Battery System ◽  
Vanadium Redox
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