31 Results for the search "simulation":
Author: h.gras
Type: Model
Downloaded: 64 times
Date: 2023-05-30
Controlled RLC
Description:
Controllable inductance and resistanced. The values can be varied during the time-domain simulation.
Tag(s): RLC, inductance, resistance, control, capacitance, controllable, vary
Author: h.gras
Type: Model
Downloaded: 76 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: Example
Downloaded: 157 times
Date: 2022-03-18
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:
... see more
- varies a fault resistance
- 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
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: h.gras
Type: Example
Downloaded: 91 times
Date: 2021-07-23
AC and DC components meter
Description:
This example contains a device which calculates the DC and AC components.
- The DC component is available in the DC control scope with half
a cycle delay versus the simulation time
- ... see moreThe AC component is available in the DC control scope with one
cycle delay versus the simulation time
Once the maximum DC magnitude is reached, the time constant is
determined assuming the DC decay is exponential and uninterrupted
Tag(s): DC, AC, exponential, meters, zero-crossing, asymmetry, fault