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Technical presentations

This talk is about parasitic torques and noise in the induction motor. It’s a personal view. This technical presentation may seem rather low-key. That’s because I’m trying to encourage calm reflection of rather abstract topics, even though this is a very practical subject.

This presentation discusses the simulation of switching overvoltages on transmission lines with trapped charge, validation of EMTP line models, modeling of prestrike in statistical simulation studies and necessary simulation practices by means of validations with field tests.

In this presentation, a case of sub-synchronous oscillations between type 3 wind turbines and MMC-based HVDC transmission is demonstrated and analyzed using EMTP.

This paper discusses the calculations involved in specifying the capacitor bank and evaluates the system response to transient switching events involving the two capacitor banks. It also provides a comparison of the results of the calculations with field measurements recorded during the commissioning of the new capacitor bank.

The presentation focuses on the transient stability studies of synchronous generator influenced by power electronics devices. The objective is to compare the critical fault clearing time for different fault locations, fault conditions and different HVDC converter fault ride through control strategies.

This presentation describes the inclusion of one white-box model in EMTP-RV using DLL code. The resulting model is highly efficient and it can be used to study internal overvoltages in the transformer during network transients, e.g. swithing operations and lightning strokes.

This presentation shows how EMTP can be used to study the stability of micro-grids with a high percentage of renewable generation, sometimes even without any synchronous generator.

The aim of this presentaion is to show the modelling process, from the identification of the MMC element parameters, to the conception of the measurement process.

In this project, a model based on reluctances network method and a mesh approach has been developed. It can reproduce the electromagnetic behavior of transformers faithfully and is configurable, automatable and compatible with EMTP. This presentaion aims at showing the context and results of this project

This case study aims at explaining the process of transformer energization with PAMSUITE, first going through the outputs of interest, then the uncertainties on influential parameters and finally explaining the results obtained

This presentation first shows the impact of wind generation on the performance of negative-sequence-based protection. In many applications, wind generators are designed to suppress negative sequence current partially or entirely.

This presentation demonstrates the impact of WP operating conditions and DFIG control system parameters on SSCI. In addition, it also shows the accuracies of various analytical tools used for SSCI problem identification will be discussed.

In this presentation, prof. Koçar shows an overview of line models and proceeds to explain the features of the new Fitter line model

This presentation is made by Abotaleb HADDADI in which he shows recent developments and challenges concerning geomagnetic disturbance simulation studies

This presentation explains the DC Grid modeling activities in Cigre WG, it gives a full description of the new Cigre DC Grid Benchmark and the implementation process of the DC Grid Model in EMTP

The popularity of Electric Vehicles (EVs) has been expanding rapidly due to government subsidies, their increased range and lower battery costs, and environmental sensitivity. SaberRD provides the unique and optimal solution for Designing, Modeling, Simulation, and Analysis of EV Battery Charging system.

Multiphysics and multi-domain approach is key when developing a new range of electrical machine. With JMAG software, we are now able to take into account in an accurate manner the most of critical development aspects when dealing with pre-design of the electrical machine, system integration, thermal constraints and noise issue.

For reasons of performance and durability, the demagnetization problem of permanent magnets is crucial. In fact, this phenomena leads to an irreversible degradation of the remanent flux density of permanent magnets. We perform using the JMAG software, a 2D finite element modeling of the electric motors coupled with the appropriate electric circuit, to analyze this phenomena.

In this presentation we will introduce the latest situation of the development of softmagnetic powder core contributing to high performance of various motors including the above-mentioned motors and examples of application to motors. The needs for automotive applications, miniaturization and higher output are increasing.

For this work a feasible approach was used, based on standardized tests of soft magnetic properties in ring specimen, to identify the material characteristics depending on the cutting edge distance. These magnetization and loss curves have then be applied to JMAG layer models of simple test geometries as well as electrical traction drives.

A case study of machine design including AC copper losses is presented which has taken into account all the aforementioned factors. The results of efficiency and thermal conditions of the machine will be the main focus. The way how we use JMAG to setup AC copper losses will also be shown, such as script operation and the winding function.

This presentation show how to accounting for AC loss in the electric machine design process using JMAG. How can we use JMAG to incorporate this into an existing design methodology for SMC-based axial flux machines and produce accurate results without excessive computational cost.

First we will see how we used JMAG to solve noise issues of an asynchronous motor. Secondly, we will present an optimization of a salient poles synchronous generator. Finally, we will explain how we used JMAG to optimize a 3.6MW Direct-Drive Superconducting Wind Turbine Generator.

In this video Prof. Miller explains the close relationship between the circuit theory, the control theory, and the field theory of electric machines. After a brief review of the nature of performance calculations, we see how the concept of the space-vector unifies the physical principles and the control methods for DC and AC machines.

Prof. Miller begins by reviewing the entire family of electric machines, uncovering the theoretical and manufacturing reasons why machines are built and used as they are today. He draws particular attention to the unity of the family of AC drives, which includes the asynchronous induction motor and the brushless PM motor as well as the AC synchronous machines.



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