Cross-Domain SignalsUtilities / charging stations / UPS / power-quality testing
Current Harmonics and THD Analysis
01
Pain Points
- !Inverters/UPS/charging stations inject harmonics that must be checked against standard limits.
- !Reading the 2nd–50th harmonic amplitudes and THD off the spectrum one line at a time is inefficient.
- !Acoustic tools and power analysis are siloed and hard to reuse.
02
The Tinia Approach
FFT at the fundamental frequency, compute each-order harmonic and THD%, and overlay limit lines — the same spectrum-compliance operators from sound and vibration carry directly to power quality.
Fundamental FFTEach-order harmonic + THD%Limit conformityLimit-line overlay
03
Nodes Used
FFT Spectrum Analysisfft_spectrum
Extract discrete harmonic spectral linesIndicator Mathindicator_math
Nth-order harmonic amplitude + THD%Spec Limit Checkspec_limit_check
Standard harmonic-limit conformityIndicator Viewerindicator_viewer
Limit-line overlay visualizationCore nodes; add or remove steps as needed for your data and standards — the node graph is always editable.
04
Expected Output
- 2nd–50th harmonic amplitudes and THD%.
- Conformity evaluation against standard harmonic limits.
- One shared workflow for acoustic and power analysis.
Reference Standards / Engineering PracticeIEEE 519 · GB/T 14549
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