107 items shared, ordered by upload date:
AC line pipeline magnetic coupling
Description:Example of overvoltage induced by magnetic coupling between a line and a pipeline
Tag(s): pipeline, coupling, induced, overvoltage
Vary parameters, start simulation and export scope waveforms by script
Description:This script is a simple example to learn how to script.
The script is started from the EMTP design by double clicking on the 'Script1' grey button.
The script example:
- varies a fault ... see moreresistance
- runs a simulation for each value
- exports results of a selected list of scope in MAT and ASCII formats
- returns Min and Max
Tag(s): script, script, ASCII, MAT, parametric, minimum, maximum
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
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
Author: PECC2_TRD_Power System Study Department
Type: Model
Downloaded: 58 times
Date: 2021-09-03
Type: Model
Downloaded: 58 times
Date: 2021-09-03
Rating:
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Large Grid Modeling - Vietnam 500-220kV Power System
Description:Large scale grid modelling of Vietnam 500-220kV power system in 2015. Using to calculate transient in power system.
Tag(s): Large Scale Grid, Power System