Abstract
Electrochemical Impedance Spectroscopy (EIS) techniques are useful tools for being able to look at the characterisation of solar panels under different conditions and/or with different material components. However EIS analysis is mostly undertaken offline with bespoke equipment. This paper describes a method of undertaking EIS measurement on-line without the use of additional equipment by manipulating the control of the solar panel connected dc-dc power electronic converter. The power electronic control is used to inject an additional low-frequency signal into the circuit and then sweep this frequency across a range to replicate the functionality of the EIS without the need for a separate excitation circuit while maintaining full operational functionality. This paper describes the methodology and presents some experimental results compared with EIS results under the same conditions to illustrate the concept.
| Original language | English |
|---|---|
| Pages (from-to) | 185-195 |
| Journal | Vacuum |
| Volume | 139 |
| Early online date | 16 Jan 2017 |
| DOIs | |
| Publication status | Published - May 2017 |
Bibliographical note
© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/Funding: EPSRC and Opal-RT
Keywords
- Dc-dc converters
- Electrochemical impedance spectroscopy (EIS)
- Frequency analysis
- Solar panel