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The increasing complexity of power grids makes hardware-in-the-loop simulations of electrical power systems more and more interesting for the industry. The simulation models are typically large. They often have to be split and used on several hardware platforms to allow efficient computations. Finding an appropriate position for splitting the simulation model requires expert knowledge about the electrical...
This paper describes a methodology to build a combined conducted and radiated emission model for integrated circuits. The development of emission models of a FPGA extracted from two different approaches is presented and discussed. The first approach allows to build a predictable model from FPGA implementation and some passive measurement on FPGA device. The second approach allows to build a model...
The power electronic based Grid Side Converter (GSC) is the key technology for interconnecting RES. In order to obtain accurate simulation results, it is important to have a detailed-realistic modelling of GSCs. This requires a very small solver step (i.e., solver period near 1 μs) due to the high-frequency switching operation of these converters. Such a small solver period imposes computational constraints,...
A full-bridge power-electronic building block using an inverse coupled inductor (CI) is presented which could substitute standard hard switched inverter legs. In contrast to commercial CPU supplies using CIs, the system is operated at full duty cycle range 0…1 at elevated power levels and shows experimentally proven material savings. The mathematical modeling leads to a volume comparison between single...
Oscillations in power electronic circuits with fast switching semiconductors are commonly known and the corresponding parasitic elements have been investigated in multiple literature. However, this paper investigates the triggering of these electromagnetic interference (EMI)-critical oscillations. An analytical description is derived using a boost converter circuit. Based on this description an optimization...
Direct braking system is a key part of train security. This system is complex and nonlinear because of coupling multi-physic energies (pneumatic, electric, mechanical translation and rotation) and working in hybrid structure involving continuous and discrete modes because of presence of relays and diodes. The objective of the present paper is to use one representation: a hybrid bond graph as a multidisciplinary...
The effect of non-idealities of a high frequency class D amplifier on it's output voltage is analysed. Firstly individual non-idealities like dead time, MOSFET body-diode drop, MOSFET ON-State drop, finite turn-on and turn-off time, series resistance of inductor and capacitor of output stage filter are taken one at a time and their effect on output voltage is analysed. Then effect of all of these...
The proposed paper deals with the problem of modelling and simulation of a dual-redundancy Electro-Hydrostatic Actuator (DREHA) by the way of co-simulation based on AMESim and MATLAB. With the development of More Electric Aircraft (MEA) technology, integrated Power-by-Wire (PBW) actuator will be used in the airborne actuation system. As an important PBW actuation system, EHA has virtues of high efficiency,...
The manufacturers of small wind turbines generally provide basic parameters of their products, resulting in increased uncertainty upon evaluating the performance of small wind turbines. Therefore, the useful and accurate modeling of a small wind turbine is significant. This work discusses the modelling and control of a small wind turbine. The basic topology design and control principle for small wind...
In this paper, the switching flow-graph models are developed to study the nonlinear behavior of DC-DC switching converters. Based on the concept of virtual switches and virtual switching functions, switching flow-graph (SFG) model are created easily without complex mathematics. The SFG modeling technique is helpful for undergraduate students or beginners to understand how the switching converters...
The connection of distributed generation increases the short circuit power which in turn might exceed the ratings of the installed circuit breakers. A solution is to limit the available short circuit power by increasing the grid impedance, but since there is a constant strive for lower losses and higher power transfer capabilities, this is not desired. The application of a fault current limiter (FCL)...
In recent years the simulation tools have been optimized for precise modelling and simulation for their special purpose. Therefore the simulation tools have been developed to model and simulate a certain problem. In the past, the hardware was used to be modeled in a SPICE simulator, the software in a signal and differential equation based simulator. Nowadays the investigated systems are decreasingly...
Switching over-voltages are a normal phenomenon when a transformer is energized. This transient is experienced when switching a service or propulsion transformer on board a ship. Under some special circumstances, the over-voltage levels experienced by the transformers may be exacerbated by system interactions and can exceed the insulation levels of the transformer, leading to damage of the windings...
This paper introduces an electro-thermal model of an inverter implemented in PLECS. This model is able to calculate IGBT junction temperature with a mission profile. Look up tables (LUT) of switching power loss are generated by running physics-based IGBT and diode models under different operating conditions. The inverter model interpolates power dissipation from the LUTs to speed up the simulation...
The power electronics circuits are seriously limited by the thermal ambience and therefore a detailed thermal design on power electronics is desirable. Especially the semiconductors are vulnerable to a high temperature and thermal cycling. The overview of power semiconductors switches as an effects of temperature are shown in this paper. In this paper the combined modeling and simulation of electrical...
Early warning system based on the detection of UHF SF6 partial discharge (PD) signals is a necessary means for the protection of Gas-Insulated Switchgear (GIS) in service as well as the power system to which it is connected. In order to ensure the safe and reliable operation of GIS, it is important to adopt an effective diagnosing method, which is able to identify signals of harmful defects promptly...
This paper presents an approach to simulate the immunity of the microcontroller based on dynamic, nonlinear and passive model. By introducing the dynamic elements, this modelling technique reflects both those dynamic and nonlinear behaviour of ports and cores of the microcontroller. It can simulate not only external interference from outside but also the internal interference of the microcontroller...
This paper introduces a modeling and simulation technique that extends transaction-level modeling (TLM) to support multi-accuracy models and power estimation. This approach provides different combinations of power and performance models, and the switching of model accuracy during simulation, allowing the designer to trade off between simulation accuracy and speed at runtime. This is particularly useful...
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