Learn About Co-simulation of Transient Stability Phasors and Electromagnetic Transients with ETAP CoSim

As part of ETAP CoSim, we have eMTCoSim, which enables the co-simulation of transient stability phasors and electromagnetic transients. Also, as part of ETAP CoSim, we offer co-simulation with existing Matlab Simulink models. In this mode, ETAP solves electrical grades as normal, but you can use existing Simulink models to co-simulate them with ETAP.
Mr. Fabian Uriarte, ETAP Vice President - Cloud and Mobile Solutions

This solution presentation introduces co-simulation concepts and the flexible ETAP CoSim platform. It will also highlight commercial use cases of Phasor and Electromagnetic co-simulation using emtCoSim™ and Controller Hardware-in-the-Loop (CHIL). 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 is a California-based company that provides power system analysis software. It is a software-agnostic vendor offering electrical design and engineering cloud platform solutions for infrastructure, buildings, and industry. ETAP was founded in 1986 and is headquartered in Irvine, California. Companies, government agencies, and educational institutions use ETAP software. The Electrical Transient Analyzer Program is an electrical network modeling and simulation software tool that accelerates digital transformation.

Location: Irvine, California, USA

Year: 2021

Co-simulate phasors from Transient Stability studies, and have waveform details at the same time on the same model

Challenges

  • Finding a solution enabling the co-simulation of transient stability phasors and electromagnetic transients on one ETAP model. Fast simulation of phasor networks, including waveform detail, is crucial when analyzing grid faults.
  • The pains of using phasor simulations in ETAP are that the user cannot see system transients at the waveform level, because they are accessible in other software like PSCAD. The engineer cannot see things such as charging currents, harmonics, ferro-resonance surges, or even how inverters respond to faults. 
  • Visualizing electrical real-time processes to understand dependencies between events in the extensive grid network modeled in ETAP.
  • Interfacing any electrical real-time application with the ETAP model. Finding the best methods to embed data from other applications.
  • Improving electrical analysis efficiency by providing multi-domain, multi-physics capability to the design and analytical process.

Co-Simulation of Electromagnetic & Phasor Transients

Used applications

ETAP Digital Twin is the leading solution. 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 map instantaneous EMT data as phasors. This conversion extracts the fundamental power components from the electromagnetic transient domain. It injects them into the phasor domain, resulting in a fast, easy-to-use, feature-rich, and robust co-simulation solver.

Why do they use ETAP?

Main Customer Benefits

  • Solving the problem in the network faster and more accurately, thanks to more retained, undisturbed information in one place and one software, integrating data from different specialized applications.
  • By using only one modeled workspace, where other applications are embedded, researchers, consultants, and engineers can analyze critical issues on one ETAP model. They do not have to open other software to check the situation on the grid. They have all the information in the ETAP model.
  • When the user combines the two pieces of information alone, it doesn't help much with studies or analysis. But if he sees this information together, he can better explain or have more insight into what happened.
  • It is crucial for electrical grid analyses that phasors from transient stability studies can be co-simulated and waveform details can be obtained simultaneously.
  • eMTCoSim enables engineers to co-simulate transient stability phasors and electromagnetic transients on one screen. Co-simulation with existing MATLAB Simulink models is possible by using an existing Simulink model.
  • Easy embedding of MATLAB Simulink models by using links and black boxes. The benefits of using Simulink in ETAP include its rich modeling environment, numerous block sets like control systems and signal processing, and its widespread use in academia and the private sector.
  • It would have been tedious and time-consuming to determine this result without the co-simulation provided by ETAP Cosim.

What do they think about ETAP?

Opinions

During the co-simulation, ETAP CoSim exchanges data among all engines involved. After the co-simulation, ETAP CoSim combines the results from each engine and aggregates the results to produce a final system-level solution, the simulation approach.

Mr. Fabian Uriarte, ETAP Vice President - Cloud and Mobile Solutions 

ETAP CoSim also lets you integrate Simulink models with ETAP. A possible combination in the ETAP platform is the ability to run transient stability studies along with models that run in Simulink. The best part is that you can retain any existing Simulink model and co-simulate it with ETAP. There is no need to export the model from Simulink, import the model into another tool, black box the model, or even change its format or add specific APIs. With ETAP CoSim, you can retain and reuse your existing Simulink model without needing to touch it.
Mr. Fabian Uriarte, ETAP Vice President - Cloud and Mobile Solutions 



Videos

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).


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