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.
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
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
Who it's for
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Keep exploring
Power Factor Correction Simulator
Add capacitor bank kVAR to a lagging-power-factor load and watch the power triangle, current, and illustrative utility penalty model update — with six real-world load scenarios and an over-correction demonstration.
Symmetrical Components & Fault Visualizer
Decompose unbalanced three-phase systems into positive, negative, and zero-sequence networks — then drive fault current through them and see every sequence quantity update in real time.
Power Transformer Simulator
Model a power transformer from 25 kVA to 10 MVA — adjust loading, impedance, power factor, tap position, and ambient temperature, then explore efficiency curves, thermal loading, voltage regulation, and fault behavior.