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Author: h.gras
Type: Model
Downloaded: 104 times
Date: 2022-10-20

Dynamic Exponential Load

Description:
This device is an implementation of the three-phase exponential load model. The load active power and reactive power vary as function of its voltage amplitude and frequency. This device is implemented... see more as described in [1]. It allows to perform classical and sophisticated dynamic-stability studies in EMTP. This device can be used in the load flow and time-domain simulations.

During the load initialization, the initial active power and initial reactive power are used to find the load-flow. The load voltage magnitude and phase with update from the load flow results automatically.
[1] "Load representation for dynamic performance analysis (of power systems)," IEEE Transactions on Power Systems, vol. 8, no. 2, pp. 472-482, May 1993.

Tag(s): dynamic, load, frequency, exponential, stability,

Author: h.gras
Type: Library
Downloaded: 155 times
Date: 2022-09-16

Quick waveform visualization tool

Description:
This toolbox adds a ‘Quick scope preview’ button available in the Simulate tab. To use it:
• Select a scope
• Click on the ‘Quick scope preview’ button.
 The waveform ass... see moreociated with this scope will open in mplot.

To install:
- Download and unzip the file
- start the installer. Select the folder of the EMTPWorks version you which to add the Toolbox.
- Restart EMTP. a ‘Quick scope preview’ button available in the Simulate tab should be available.

Tag(s): waveform, visualization, scope

Author: h.gras
Type: Library
Downloaded: 113 times
Date: 2022-09-09

Digitial Twin Toolbox

Description:
The Digital Twin toolbox provides an example demonstrating how to synchronize EMTP device parameters with data received from a sender (Sender) through TCP/IP using the WebSocket protocol. A receiver (... see moreReceiver) accepting data in string format is also provided and may be started from the “Digital Twin Receiver” button device of the Digital Twin library.

To install:
- Download and unzip the file
- start the installer. Select the folder of the EMTPWorks version you which to add the Digital Twin Toolbox.
- Restart EMTP. A new Digital Twin library and a new Digital Twin example should be available.

More information is available from the help file of the Digital Twin device of the library.

Tag(s): digital twin, TCP, IP, scada, control room

Author: Mihajlo
Type: Example
Downloaded: 169 times
Date: 2022-04-08

Electrical Transients in Power Systems Example in EMTP

Description:
RL and RLC circuit, and the simple TRV example from Chapter 3 of the textbook 'Electrical Transients in Power Systems' by Allan Greenwood - modeled in EMTP.

Tag(s): trv, simple, rlc, greenwood, allan greenwood, electrical transients

Author: n.sene
Type: Publication
Date: 2015-04-01

AN ADVANCED INTERFACE BETWEEN THE LIOV CODE AND THE EMTP-RV

Description:
Accurate evaluation of the response of overhead distribution lines to lightning electromagnetic pulse (LEMP) represents an important aspects in insulation coordination of distribution network. The imp... see morerovements of the accuracy of such an analysis call for the extension of the field-to-transmission line coupling models from single straight lines to multi-conductor/branched and complex systems. This paper deals with the description of a new interface between the LIOV (Lightning Induced OverVoltage) code and the EMTP-RV software. In particular, the paper illustrates the treatment of the boundary conditions – on which the link with the Augmented Nodal Analysis Technique adopted by the EMTP-RV is based – together with the main aspects related to the numerical integration of the Agrawal and al. LEMP-to-transmission line coupling model adopted in the LIOV code.
The proposed interface aims at improving the simulation capabilities of the previous version of the LIOV-EMTP, namely this new version completely removes the disadvantage of the time-delay associated to the use of a short Bergeron’s line needed to link the LIOV code with the EMTP. Additionally, this new version of the LIOV-EMTP code takes advantages of the Augmented Nodal Analysis Technique implementation in EMTP-RV. Comparison with experimental results is also presented in order to verify the accuracy of the proposed interface.

Authors: A. Borghetti, F. Napolitano, C.A. Nucci, M. Paolone, J. Masheredjian, F. Rachidi

29th Conference on Lightning Protection 23rd – 26th June 2008 Uppsala, Sweden

Tag(s): LIOV, EMTP-RV, LEMP