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EMTP Features

EMTP provides many features for a detailed representation of power systems including wind plant, solar power plant and others distributed generation.

 

Power quality

Power quality assessment are required before the integration of Distributed Energy Resources (DER), (including wind turbines, photovoltaic and inverter controlled DER) to the grid. Harmonic distortion and voltage conditions are investigated and require a reliable engineering simulation tool.

EMTP-RV single diagram of the power plant including PV

Figure 1: EMTP-RV single diagram of the power plant including PV.

 

EMTP software and its features are widely used to analyse harmonic, flicker and frequency variation in power system.

Harmonic Current Distortion

Figure 2: Harmonic current distortion.

 

Power engineers who use EMTP software can determine the total harmonic distortion (THD) and compute a network impedance scan at the point of connection for the resonance detection.

 

Impedance scan at the point of connection

Figure 3: Impedance scan at the point of connection.

 

Renewable energies

EMTP software has detailed time domain models of Type III and Type IV WTGs. Both average-value and full detailed models are available. Wind-park controllers are also modelled.  

Impedance scan at the point of connection WP_DFG1

Figure 4: EMTP Wind-park model and Wind-turbine model

 

Power utilities and TSO use EMTP to model and simulate their networks (including wind farms, solar plant, protection systems…). Protection engineers can use EMTP protection toolbox to analyze the impacts of renewable energy resources on protection systems.

EMTP single diagram of power plant including wind farm

Figure 5: EMTP single diagram – Integration of Wind-park in the grid

EMTP-RV-Wind-park-model–Main-data.

Figure 6: EMTP Wind-park model – Main data

MTP-RV-RV-Wind-park-model-Controller-data

Figure 7: EMTP Wind-park model – Controller data

            

Manufacturer models can be very easily incorporated in EMTP using DLL. Most of the major manufacturers have their models available in EMTP. If the control is defined in Matlab/Simulink, it can be imported very easily using the Simulink Toolbox.

 

Subsynchronous Resonance and Shaft Stresses

Power engineers can use EMTP models of wind turbine generators and synchronous machines with the frequency scan for impedance seeing from power plant to detect whether potential for subsynchronous resonance exists.

A library of machine controls is available containing the controls from IEEE 421-2005. Detailed synchronous machines are available (electrical and mechanical models). The mechanical part is based on a multi-mass model.

 

Parameters-of-the-mechanical-part-of-the-synchronous-machine

Figure 8: Parameters of the mechanical part of the synchronous machine

The software EMTP is developed and commercialized by Powersys.
EMTP is a full-featured and technically advanced simulation and analysis professional software for power system transients.

 

The package is a sophisticated computer program for the simulation of electromagnetic, electromechanical and control systems transients in multiphase electric power systems. EMTP is used worldwide as a reference tool by the main actors of the power system industry (EDF, RTE, Hydro-Québec and many others). It is suited for a wide variety of power system studies whether they relate to project, design and engineering, or to solving problems and unexplained failures. Its capibility to to efficiently and quickly perform simulation of very large power systems, its numerical robustness and the stability of the simulation engine contribute to make of EMTP the reference for power systems transients. EMTP features a wide variety of modeling capabilities encompassing electromagnetic and electromechanical oscillations ranging in duration from microseconds to minutes.

 

 

 

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