Exchange Platform

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: 119 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

Author: PECC2_TRD_Power System Study Department
Type: Model
Downloaded: 167 times
Date: 2021-09-03

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

Author: Mihajlo
Type: Document
Downloaded: 134 times
Date: 2020-12-10

Fuel cell model documentation

Description:
Generic fuel cell model documentation - associated EMTP models available on EMTP exchange platform

Tag(s): hydrogen, fuel cell, boost, converter,

Author: Mihajlo
Type: Model
Downloaded: 118 times
Date: 2020-12-10

Hydrogen storage

Description:
Hydrogen storage model file includes:
• Hydrogen storage model documentation
• EMTP file that consists of:
o Two versions of the EMTP high-pressure hydrogen storage models and their... see more validation simulations
o EMTP hydrogen bottle model and its validation simulation

Tag(s): hydrogen storage