CoSimulation of Electromagnetic & Phasor Transients

eMTCoSim™ - Phasor & EMT CoSimulation


Multi-Domain Phasor + EMT CoSimulation
The ETAP  eMTCoSim™ mode (provided with eMT™) to enables co-simulation of Electromagnetic and Phasor Transients. ETAP’s Transient Stability (TS) program and eMT are combined to collectively solve large, complex, and multi-disciplinary system- models with higher fidelity.  ETAP TS solves the large portions of the network using phasors while eMT solves only the portions requiring waveform-level fidelity.

Co-simulation of Electromagnetic Transients & Phasors

  • Hybrid simulation combining transient stability phasors and electromagnetic transients 
  • Simulate large network sections using phasors
  • Add waveform-level fidelity only where needed (e.g., inverters)
  • Co-simulate at milli-second and micro-second time steps 
  • Analyze the coupling between the phasor and electromagnetic transient domains: events in one domain propagated to the other
  • Live plots for transient stability and EMT simulations
  • ETAP’s mapping can export network and components to the electromagnetic transient domain
Co-simulation of Electromagnetics & Phasors

eMTCoSim offers a hybrid simulation comprising EMT and phasor domains. This gives the best of both domains: the solution of larger networks with phasors and added fidelity where needed.  

ETAP has developed  accurate signal processing algorithms (waveform to phasor data conversion) to accurately map instantaneous EMT data as phasors. This conversion extracts the fundamental power components from the electromagnetic transient domain and injects them into the phasor domain resulting in a fast, easy-to-use, feature rich, and robust co-simulation solver. 



Efficient Design & Analysis with CoSimulation

Efficient Design & Analysis with CoSimulation

Co-simulation is the cooperative simulation of a system model through different software packages. Collaborative simulation, as such, spans more physics domains and offers more insight than single-domain engines alone. Therefore, the collective composition of its parts enables multi-domain, multi-physics simulation results.​ ETAP CoSim™ enables ETAP simulation engines to collaborate and interact. For example, the ETAP Time Domain Power Flow can co-simulate with ETAP Harmonic Analysis to assess harmonics distortion over time. ETAP CoSim platform also enables ETAP and 3rd party tools to co-simulate and solve large, complex, and multi-disciplinary system models—collectively via an efficient API surface. The ability to co-simulate with third-party software extends existing software capabilities into the multi-physics domain and greater situational awareness. This solution presentation will introduce the concepts of co-simulation and the flexible ETAP CoSim platform. The presentation will also highlight commercial use-cases of Phasor and Electromagnetic co-simulation using emtCoSim™ and Controller Hardware-in-the-Loop (CHIL).

eMTCoSim™ - CoSimulation of Electromagnetic & Phasor

eMTCoSim™ - CoSimulation of Electromagnetic & Phasor

Learn how ETAP Transient Stability program and Electromagnetic Transients Program (eMT) are combined in eMTCoSim mode to provide hybrid simulations of Phasor and Transients domains to collectively solve large, complex, and multi-disciplinary system models with higher fidelity.


White Papers



Training & Events

ETAP Training

Training & Events

Get an in-depth insight to our electrical engineering software by requesting a training course that suits you.

Discover Now


Explore ETAP Today

Take a test drive of ETAP free for 30 days to experience for yourself the capabilities
of ETAP solutions. Try out ETAP’s extensive collection of modules and analysis results
on this cloud-based demo platform - anytime and anywhere. Start your online demo today!