Harmonic Analysis
Estimate source-level THD and identify harmonic conditions requiring a PCC study.
Screening only—not IEEE 519 compliance. IEEE 519 evaluation requires aggregated voltage and current distortion at the point of common coupling, including current TDD based on maximum demand load current. This page evaluates individual modeled sources.
Unbalanced Analysis (per-phase spectra)
Enter independent harmonic spectra for each phase using order:pct notation (e.g. 3:30,5:14). Leave a field blank to inherit the balanced spectrum from the one-line component.
| Component ID | Phase A spectrum | Phase B spectrum | Phase C spectrum |
|---|---|---|---|
| No harmonic source components found. Add components with Harmonic Source enabled in the one-line editor. | |||
| Component | ITHD-A (%) | ITHD-B (%) | ITHD-C (%) | VTHD worst (%) | VTHD screening limit (%) | Neutral I (% phase) | Neutral dominant order | Status |
|---|
Frequency Scan (harmonic resonance)
Sweep system impedance Z(h) vs. harmonic order to identify parallel resonance peaks. A peak near an integer harmonic order means that harmonic current is amplified — a common hazard when adding capacitor banks for power factor correction.
Capacitor / Filter Banks
| # | MVAR | kV | Tune Order (0 = untuned) | Q Factor |
|---|
| Harmonic Order | Z (pu) | Type | Risk | Recommendation |
|---|