Harmonic Ratio Analysis (HRA) for Online Monitoring of Electrolyzers and Fuel Cell Systems - A Nonlinear Diagnostic Method Complementing Electrochemical Impedance Spectroscopy (EIS)
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| Format: | Recurso digital |
| Sprache: | Englisch |
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2026
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| _version_ | 1866902002510856192 |
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| author | Benecke, Hannes Benecke, Robert |
| author_facet | Benecke, Hannes Benecke, Robert |
| contents | <p>Harmonic Ratio Analysis (HRA) is a nonlinear electrochemical diagnostic method for online condition monitoring of electrolyzers and fuel cell systems at cell and stack level. The method evaluates selected harmonic ratios derived from low-frequency multi-frequency modulation of the operating point and provides robust trend-based indicators of asymmetric transport-related and symmetric kinetic nonlinearities.</p> <p>This technical note describes the measurement principle, harmonic ratio definitions, multi-frequency evaluation strategy, quality chain including SNR gating and persistence criteria, and practical implementation aspects for laboratory testing, industrial stack monitoring, and controller integration. The method is designed as a complementary approach to electrochemical impedance spectroscopy (EIS) for field-robust nonlinear diagnostics.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_18743943 |
| institution | Zenodo |
| language | eng |
| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Harmonic Ratio Analysis (HRA) for Online Monitoring of Electrolyzers and Fuel Cell Systems - A Nonlinear Diagnostic Method Complementing Electrochemical Impedance Spectroscopy (EIS) Benecke, Hannes Benecke, Robert Harmonic Ratio Analysis Electrochemical diagnostics Nonlinear frequency response Electrolyzer monitoring Fuel cell diagnostics Stack monitoring Online condition monitoring Electrochemical impedance spectroscopy <p>Harmonic Ratio Analysis (HRA) is a nonlinear electrochemical diagnostic method for online condition monitoring of electrolyzers and fuel cell systems at cell and stack level. The method evaluates selected harmonic ratios derived from low-frequency multi-frequency modulation of the operating point and provides robust trend-based indicators of asymmetric transport-related and symmetric kinetic nonlinearities.</p> <p>This technical note describes the measurement principle, harmonic ratio definitions, multi-frequency evaluation strategy, quality chain including SNR gating and persistence criteria, and practical implementation aspects for laboratory testing, industrial stack monitoring, and controller integration. The method is designed as a complementary approach to electrochemical impedance spectroscopy (EIS) for field-robust nonlinear diagnostics.</p> |
| title | Harmonic Ratio Analysis (HRA) for Online Monitoring of Electrolyzers and Fuel Cell Systems - A Nonlinear Diagnostic Method Complementing Electrochemical Impedance Spectroscopy (EIS) |
| topic | Harmonic Ratio Analysis Electrochemical diagnostics Nonlinear frequency response Electrolyzer monitoring Fuel cell diagnostics Stack monitoring Online condition monitoring Electrochemical impedance spectroscopy |
| url | https://doi.org/10.5281/zenodo.18743943 |