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Overview |  |
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Features | |
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Overall architecture | |
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Simulation options | |
For answers to some of the questions from our last Webinar, please visit our FAQ section. |
Overview
EMTP-RV is the end result of the "EMTP Restructuring project" undertaken by the DCG in 1998 for modernizing the EMTP96 software. EMTP-RV is the enhanced computational engine and EMTPWorks its new graphical user interface (GUI). The package is a sophisticated computer program for the simulation of electromagnetic, electromechanical and control systems transients in multiphase electric power systems. It features a wide variety of modeling capabilities encompassing electromagnetic and electromechanical oscillations ranging in duration from microseconds to seconds. Examples of its use include switching and lightning surge analysis, insulation coordination, shaft torsional oscillations, ferroresonance and power electronics applications in power systems.
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| A transient stability case study | User defined load model form |
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| Series capacitor subnetwork | Example of signals drawn by Scopeview |
- Written from scratch using mostly Fortran-95 in Microsoft Visual Studio environment
- Object-oriented based programming methods
- Designed for very fast computation with fully dynamic and case-tailored memory usage
- New sparse matrix based formulation of network equations capable of handling very large cases, eliminating topological limitations and providing a plugin model interface
- Significantly improved solution method for nonlinear models: provides very fast convergence, no topological restriction
- Open architecture coding that allows users customization and userside implementation of sophisticated models
- Major improvements in the simulation of control systems
- New approach with built-in models and encapsulation
- Better ordering techniques
- Optional iterative solver for precisions and user-defined modeling options
- New steady-state solution with harmonics
- New three-phase load-flow
- Automatic initialization from steady-state solution
- New capability for solving detailed semiconductor models
- Simultaneous switching options for power electronics applications
- Code structure designed to be expandable to specialized toolboxes
EMTP-RV computational engine is driven by EMTPWorks. The bulk data transmission from EMTPWorks to EMTP-RV is performed using a Netlist file. EMTP-RV reads the Netlist file, decodes the simulated network topology, finds all required device models and computation functions, builds the system matrix and performs the simulation. The simulation results are saved into binary and ASCII files.
The main binary file is used for showing simulation waveforms from a stand-alone waveform visualization application named ScopeView. Some of such output files are HTML files and can be viewed only through the Internet Explorer Program.
EMTPWorks can also start a data translator function which is designed to convert old EMTP96 (previous version of EMTP) data files into a translated file format which can be decoded and simulated by EMTP-RV. The Data Translator is used only as a temporary transition option and has a limited compatibility with old data cases. There is no direct mapping between the old EMTP-V3 models and the new EMTP-RV models and there is no schematic generated by the translator.
EMTP-RV accepts several simulation options which are performed for arbitrary network configurations. All options are applicable to all devices within documented rules of device behavior. These are:
- Frequency scans
- Steady-state solutions: linear harmonic steady-state solution, non-linear harmonic steady-state solution and three-phase power flow
- Time domain solutions: fixed time-step trapezoidal with/without backward Euler method, automatic initialization from steady-state, startup from manual initial conditions and special option for power electronics instantaneous switching conditions within a time-step
- Statistical/systematic analysis