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KEPCO developed meter reading system based on AMI (Advanced Metering Infrastructure) over PLC (Power Line Communication) network for low-voltage customers. Currently, meter reading system of KEPCO operates 2.5 million low-voltage customers and will be 22 million until 2020. This paper introduces the AMI NMS (Network Management System) to monitor the network operating status of DCU and PLC modem for...
In this paper, reliability as well as electrical properties of high capacitance density metal–insulator–metal (MIM) capacitor with hafnium-based dielectric is analyzed in depth. The fabricated MIM capacitor exhibits not only high capacitance density but also low voltage coefficient of capacitance (VCC) and low temperature coefficient of capacitance (TCC). It also has a low leakage current level of...
In this paper, novel Ni silicide on boron cluster implanted source/drain junction is proposed and its thermal stability characteristics are analyzed in depth. The proposed Ni-silicide (Ni-Pd(5%)/TiN) is compared with pure Ni/TiN structure and the effect of boron cluster on the shallow junction of high performance MOSFETs is characterized.
In this paper, we embody KS-MAC protocol based on Korea national standard (KS X 4600-1) Class A protocol with NS-2 simulator and verify its performance. Also, we develop optimized high speed MAC in medium-voltage and propose efficient topology. Compared with experiment results and simulated results are quite analogous. With help of this simulation, when construct network with multi-node, we easily...
This paper presents a manipulator workspace boundary generation algorithm that can be easily implemented as a computer algorithm. The algorithm searches the workspace boundary on the basis of slice curves which are defined as the cross-section of the workspace boundary with planes parallel to XY , YZ, or XZ plane. The collection of these slice curves represents a tomographic view of the workspace...
A communication network plays an important role in distribution automation system(DAS). In this paper, a powerline communication network which might span geographically 5-50 km using a bus or tree topology has been introduced. In the powerline communication networks, data signal cannot travel long distance because of attenuation, noise, and distortion. Consequently, we need to insert a number of repeaters...
In the realm of substation automation (SA), communication infrastructure plays a vital role in mediating between physical and virtual worlds of substation. Specification of data exchanges through standardized communication stacks is therefore an important issue for all substation equipment manufacturers seeking to provide vendor interoperability. Nowadays competitive electric utility marketplace,...
The IEC 61850 presents the international standard for communication networks and systems in substations. The standard discusses the detail of the requirements and the architecture of substation automation system as well as data type and format. The TEC 61850 will substitute the traditional hardwired analog communication network using up- to-date communication protocols for interoperability and reliable...
Powerline communication (PLC) has advantages for communication, but PLC should be complemented before being used for long distance communication in distribution automation system (DAS). In this paper, we propose the composite communication system which becomes more reliable and flexible by connecting PLC network with the existing satellite, TRS, and HFC (hybrid fiber coaxial) networks
Much has been previously written about the performance of slotted ring networks. However, the results are not appropriate to apply for the new generation slotted rings, like counter-rotating multichannel slotted rings. In this paper, a novel technique for quantitative measurement of average transfer delay of a class of slotted rings is presented. The approach is expanded to compare the average transfer...
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