ElectroMagnetic Transient Program - EMTP

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ElectroMagnetic Transient Program - EMTP

ETAP offers an ElectroMagnetic Transient Program (EMTP) for simulation and analysis of power system transients. It provides a full spectrum of modeling capabilities for analysis of phenomena in microseconds.

ETAP provides an intuitive interface with widely used EMTP software solutions for comprehensive and efficient simulation of all sizes of power systems.

Applications & Features

Line & Cable Systems

  • Insulation coordination
  • Switching
  • Design
  • Wideband line and cable models

Switching Transients / Surges

  • Deterministic
  • Probabilistic
  • Single-pole switching
  • High-speed reclosing
  • Capacitor switching

Lightning Surges

  • Backflash
  • Induced surges
  • Incoming surges at stations


  • Power oscillations
  • Saturation problems
  • Surge arrester influences

Shaft Torsional Stress

  • Sub-synchronous resonance
  • Switching-induced


  • Transient Recovery Voltage (TRV)
  • Shunt compensation
  • Current chopping
  • Delayed-current zero conditions
  • Arc interaction

Synchronous Machines

  • SSR
  • Auto-excitation
  • Control
  • TRV


ElectroMagnetic Transients Calculation Graphs