14 research outputs found
Coupling of Real-Time and Co-Simulation for the Evaluation of the Large Scale Integration of Electric Vehicles into Intelligent Power Systems
This paper addresses the validation of electric vehicle supply equipment by
means of a real-time capable co-simulation approach. This setup implies both
pure software and real-time simulation tasks with different sampling rates
dependent on the type of the performed experiment. In contrast, controller and
power hardware-in-the-loop simulations are methodologies which ask for
real-time execution of simulation models with well-defined simulation sampling
rates. Software and real-time methods are connected one to each other using an
embedded software interface. It is able to process signals with different time
step sizes and is called "LabLink". Its design implies both common and specific
input and output layers (middle layer), as well as a data bus (core). The
LabLink enables the application of the co-simulation methodology on the
proposed experimental platform targeting the testing of electric vehicle supply
equipment. The test setup architecture and representative examples for the
implemented co-simulation are presented in this paper. As such, a validation of
the usability of this testing platform can be highlighted aiming to support a
higher penetration of electric vehicles.Comment: 2017 IEEE Vehicle Power and Propulsion Conference (VPPC
Fitting the grain orientation distribution of a polycrystalline material conditioned on a Laguerre tessellation
The description of distributions related to grain microstructure helps
physicists to understand the processes in materials and their properties. This
paper presents a general statistical methodology for the analysis of
crystallographic orientations of grains in a 3D Laguerre tessellation dataset
which represents the microstructure of a polycrystalline material. We introduce
complex stochastic models which may substitute expensive laboratory
experiments: conditional on the Laguerre tessellation, we suggest interaction
models for the distribution of cubic crystal lattice orientations, where the
interaction is between pairs of orientations for neighbouring grains in the
tessellation. We discuss parameter estimation and model comparison methods
based on maximum pseudolikelihood as well as graphical procedures for model
checking using simulations. Our methodology is applied for analysing a dataset
representing a nickel-titanium shape memory alloy
Wedge splitting test method: quantification of influence of glued marble plates by two-parameter fracture mechanics
In the present paper, the well-known wedge splitting test (WST) is applied on specimens with different geometries (S= 150, 200, 300 mm) and variants of the specimens’ configurations. K-calibration (B1) and T-stress (B2) calibration curves for such specimens are introduced. The objective was to compare and discuss the values of the calibration curves dependent on the specimen’s geometries and on three different specimens' configurations: homogenous specimen; specimen with marble plates forming the groove for load application and specimen with glued marble plates
Wedge splitting test method: quantification of influence of glued marble plates by two-parameter fracture mechanics
ABSTRACT. In the present paper, the well-known wedge splitting test (WST) is applied on specimens with different geometries (S= 150, 200, 300 mm) and variants of the specimens' configurations. K-calibration (B 1 ) and T-stress (B 2 ) calibration curves for such specimens are introduced. The objective was to compare and discuss the values of the calibration curves dependent on the specimen's geometries and on three different specimens' configurations: homogenous specimen; specimen with marble plates forming the groove for load application and specimen with glued marble plates
Wedge splitting test method: quantification of influence of glued marble plates by two-parameter fracture mechanics
In the present paper, the well-known wedge splitting test (WST) is applied on specimens with
different geometries (S= 150, 200, 300 mm) and variants of the specimens’ configurations. K-calibration (B1)
and T-stress (B2) calibration curves for such specimens are introduced. The objective was to compare and
discuss the values of the calibration curves dependent on the specimen’s geometries and on three different
specimens' configurations: homogenous specimen; specimen with marble plates forming the groove for load
application and specimen with glued marble plates
Fitting the grain orientation distribution of a polycrystalline material conditioned on a Laguerre tessellation
Comparison of Power Hardware-in-the-Loop Approaches for the Testing of Smart Grid Controls
The fundamental changes in the energy sector, due to the rise of renewable energy resources and the possibilities of the digitalisation process, result in the demand for new methodologies for testing Smart Grid concepts and control strategies. Using the Power Hardware-in-the-Loop (PHIL) methodology is one of the key elements for such evaluations. PHIL and other in-the-loop concepts cannot be considered as plug’n’play and, for a wider adoption, the obstacles have to be reduced. This paper presents the comparison of two different setups for the evaluation of components and systems focused on undisturbed operational conditions. The first setup is a conventional PHIL setup and the second is a simplified setup based on a quasi-dynamic PHIL (QDPHIL) approach which involves fast and continuously steady state load flow calculations. A case study which analyses a simple superimposed voltage control algorithm gives an example for the actual usage of the quasi-dynamic setup. Furthermore, this article also provides a comparison and discussion of the achieved results with the two setups and it concludes with an outlook about further research