Power System Simulator

Model a three-phase or single-phase power system — configure source voltage, a transformer, and multiple loads, apply power factor correction, and see live phasor diagrams, voltage and current waveforms, and system metrics update in real time.

AVAILABLEAUTOMATED CHECKS ONLYCONCEPTUAL ONLYINTERMEDIATEWHAT DO THESE STATUSES MEAN?

3-PHASE / 1-PHASEWYE / DELTALIVE PHASOR + WAVEFORMPF CORRECTION MODEL

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Overview

Understanding how voltage, current, real power, reactive power, and apparent power interact across a live system is harder to develop from equations alone than from a tool that responds as you change it. This simulator builds a complete source-to-load power system in the browser: configure a three-phase or single-phase source (up to 15 kV line-to-line), define a transformer (primary voltage, secondary voltage, kVA rating, and percentage impedance), add multiple loads with individual kW and power factor entries, and optionally apply capacitor bank power factor correction. Every change instantly updates phase currents, real/reactive/apparent power distribution, a live phasor diagram, instantaneous voltage and current waveforms, system schematic, and an insights/warnings panel. Six preset scenarios cover Balanced Wye, Unbalanced Wye, Balanced Delta, Heavy A-Phase Imbalance, Reversed Rotation, and Unloaded Phase C — making it easy to explore unbalanced and abnormal conditions. The system supports 50 Hz or 60 Hz, Wye or Delta connection, ABC or ACB phase sequence, and L-N or L-L voltage reference. Educational content is built in for Three-Phase Fundamentals, Wye vs. Delta Connections, and Single-Phase Modes.

App preview

A live look at the app you'll launch — every control on the left drives the visualizations on the right in real time.

Inside the lab

Example data — not a real field report

Dashboard with system metrics — Dashboard · System metrics, per-phase currents, and power distribution update live as you change loads or the source.

Phasor diagram — Phasors · Live V and I vectors for each phase reveal power factor angle, imbalance, and sequence rotation at a glance.

Voltage and current waveforms — Waveforms · Instantaneous three-phase voltage and current in the time domain — see harmonics-free 60 Hz behavior and phase shift directly.

System schematic — Schematic · Source → transformer → loads block diagram keeps the physical system in view while you tweak numbers.

Preset scenarios — Scenarios · Six presets — Balanced Wye, Unbalanced Wye, Balanced Delta, Heavy A-Phase, Reversed Rotation, Unloaded Phase C.

Learn tab — Learn · Three-Phase Fundamentals, Wye vs Delta, and Single-Phase Modes background right next to the interactive model.

What you'll do

01Calculate line-to-neutral and line-to-line voltages for both Wye and Delta connections given source voltage
02Explain how adding a load with lagging power factor changes current magnitude and phase relative to voltage
03Predict how an unbalanced three-phase load (heavy A-phase) affects neutral current in a Wye system
04Describe the effect of reversed phase sequence (ACB vs. ABC) on motor rotation and protective relay behavior
05Apply power factor correction by adding capacitor bank kVAR and observe the reduction in line current
06Read a phasor diagram showing V and I vectors and identify real power, reactive power, and power factor angle

What this lab is not

Not a design document, stamped calculation, or approval record.
Not a substitute for engineering analysis by a licensed professional.
Not connected to live equipment and not a safety device.

Calculation basis

Results are computed from first-principles circuit relationships using the values you enter.

Simplifying assumptions are stated in the lab itself; where a model is intentionally conceptual, the lab says so rather than implying study-grade accuracy.

Standards basis: Conceptual only. Validation state: Automated checks only (last checked 2026-08-15).