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Busbar distribution systems are highly preferred to carry electrical energy as a part of the low-voltage grid in order to meet power requirements, especially in industrial areas. From the perspective of broadband power line communication possibilities in the smart grid concept, there is a need to know for high-frequency characteristics of busbars. This paper investigates the influences of line length...
The modeling approach is an effective method to obtain the primary line parameters of a transmission line from measured S-parameters. The model parameters are determined according to an objective function with an optimization algorithm. The definition of the objective function is as crucial as the selection of optimization algorithm for the success of the modeling approach as well as the model used...
The behavior as a power line communication medium of the busbar distribution systems is a needful investigation area as a part of smart grid concept. The channel characteristics of busbar should be investigated for providing power line communication. Transmission line models are given in characteristic impedance and propagation constant. The purpose of this study is to investigate the characteristics...
Having not been examined the busbar sufficiently until now as a communication channel in the narrowband PLC communication increases the importance of this issue twice as much. Therefore, as a PLC communication channel, the channel characteristics of the busbar should be determined. The aim of this study is to investigate the characteristics of the busbar for the narrowband PLC applications. This study...
Attenuation caused by trees should be estimated for the purpose of high altitude platforms link design. Thus, the knowledge of vegetation depths for different tree types (conic, ellipsoid, spherical, hemispherical) and elevation angle distributions in a coverage area is required. For this purpose, bivariate histogram of vegetation depths and probability density function of elevation angles are calculated...
Close region interference is a problem in point cloud processing at the selection of local region step. Thus, growing local region with discarding the unwanted points is a crucial stage before post processing. Euclidean minimum spanning tree (EMST) is widely used to overcome this problem. This study aims to investigate the utilization of EMST for three commonly used region growing algorithms k-nearest...
This paper aims to analyze communication characteristics of the high current low-voltage (LV) busbar systems in 1–50 MHz frequency range due to the fact that busbar as an integrated part of the overall Power Line Communications (PLC) channel, it is necessary to investigate its communication characteristics. Firstly, the modeling of a compact structure LV busbar system is described. Then, this system...
This paper reports on the communication possibilities of high power busbar systems as a part of smart grid concept. A compact structure busbar system (3 m length) is modelled physically and carried out by an EM analysis simulation tool based on methods of moments. Scattering parameters of the busbar system are obtained for three different port connections: L1-Neutral, L2-Neutral and L3-Neutral. All...
Local region growing strategy that is a preliminary step of polynomial fitting in point cloud processing plays an important role. Most common utilized region growing algorithms has been compared by incorporating the normalized eigenvalue analysis method. The results of this study which includes circular region growing method, nearest neighbor region growing method, Euclidean minimum spanning tree...
In this study, we are focused on thinning branching noisy data sets into curves. Robust Line Fitting (RLF) method is proposed for local linear region determination and also overcome problems which occur in high curvature regions. The performance of the RLF method is tested on different noisy branching data sets. These sets are generated artificially in three separation angles (30°, 60°, 90°) and different...
This paper describes the PLC broadband channel application for home automation in Turkey. Firstly, the necessity of information and communication technologies (ICT) for smart grid is discussed and channel models for LV power lines-especially transmission line based models are explained. For application step, a typical house which has five rooms is selected. Then, the potential loads are located. In...
In this paper, propagation modeling and performance analysis on the HAPs are obtained. Elevation angle is the dominant parameter on the model. All possible propagation environments are divided into four groups: suburban (SU), urban (U), dense urban (DU) and urban high rise (UHR). These groups are modeled using well-known statistical models with a dependence on elevation angle. The main parameters...
In this paper, we propose a method to determine the best regression axis to order the noisy points for curve reconstruction. The fundamental problem of the curve reconstruction is to order the data in most suitable way. We suggested a histogram based feature to be able to determine the goodness of the order for a regression line. The method developed by using the proposed feature tested on the some...
In this paper, we propose an eigenvalue analysis based bandwidth selection method for fitting curves to noisy point clouds. Firstly the selection of a suitable local region radius (bandwidth) is carried out by using the normalized maximum eigenvalue. Then the regression line of the local region is used for ordering the data. Finally, a 3th order polynomial is fitted to the local data by using least...
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