Exchange Platform

Author: e.malaval
Type: Model
Downloaded: 46 times
Date: 2022-01-19

Extract data from input file

Description:
If you attach the script to a device, by putting the path of "script.dwj" in the attribute "Script.open.Dev", a window opens when you double-click on the device.... see more>
This wndow allows to copy the content of a file in the "Modeldata" attribute.

Tag(s): input file, script, import

Author: e.malaval
Type: Model
Downloaded: 110 times
Date: 2022-01-19

HVDC models

Description:
These models contain a 3-phase rectifier (AC/DC) and a 3-phase inverter (DC/AC).

The average model (AM) just contains a control circuit that is connected to several controlled sources.
... see more
The detailled model (DML) contains complete inverter and rectifier models and represents the semi-conductors.

Tag(s): Power electronics, inverter, rectifier, average, detailled

Author: e.malaval
Type: Model
Downloaded: 52 times
Date: 2021-11-30

DC component suppressor

Description:
This model suppresses the DC component in the measure of a fault current to keep only the permanent part.

Tag(s): fault, converter, filter, current

Author: h.gras
Type: Publication
Date: 2021-11-30

Modular Multilevel Matrix Converter for Low-Frequency AC Transmission – modeling and Simulation in EMTP

Description:
Authors: Rafael Castillo-Sierra and Giri Venkataramanan
The transmission of power with AC faces limitations both to the stable operation of the electrical system and to the physical properties of... see more the transmission lines. Therefore, alternatives are being sought to mitigate these problems without the need to build new lines or replace existing ones with new, more powerful ones. In this context, a proven method makes it possible to overcome these problems by reducing the frequency at which power is transmitted. This method is known as Low Frequency AC Transmission (LFAC). In this sense, the model presented in this Research Contribution Prize Program EMTP® 2021 shows the implementation of a low-frequency transmission line in a small power system. The model presented shows a new block in EMTP of the AC/AC converter used, the Modular Multilevel Matrix Converter (MMMC) and the controls necessary for its operation. Time domain studies show that the technology is feasible and has the potential to improve the controllability and stability of transmission systems.

Tag(s): AC-AC power conversion, Electromagnetic Transient Studies in EMTP, Low frequency AC transmission, Modular Multilevel Matrix Converter

Author: rcastilloj
Type: Model
Downloaded: 103 times
Date: 2021-10-01

Power System with a Transmission Line operating at low frequency

Description:
Demonstration of the operation of a power system with a transmission line in low frequency. This model contains a 5-bus power system with a transmission line operated at a frequency of 41Hz.
The ... see moresystem includes:
- Model of frequency converters (averaged model of the Modular Multilevel Matrix Converter, MMMC).
- Converters control schemes.
- Initialization branches to include the low frequency line in the steady-state calculation.
- Internal variables of the converters such as voltages in the storage capacitors, branch currents, internal voltages, among others, can be plotted.
- External variables to the converters such as power flow in the low frequency line, currents and voltages can also be plotted.

Tag(s): MMMC, Low-Frequency AC Transmission, Power System Operation, Power converters, Control of power converters