Young-Hyun Kim

A simulation study of the PLC-MAC performance using network simulator-2

Power line communication (PLC) technology can be a viable solution for the future ubiquitous networks because it provides a cheaper alternative to other wired technology currently being used for communication. However, for the better performance of PLC-based networks, their physical layer and medium access control (MAC) protocols need to be a lot more enhanced. Recently, many physical frame encoding technologies have been developed, but the MAC protocols still need more consideration because of the unique characteristics of power line channels. In this paper, we describe an overview of the Korea Standard power line MAC protocol (called KS-MAC). We also report the simulation results performed with the well-known simulation tool of network simulator-2 (i.e., NS-2) and compared with the actual field test data.

PLC technology of KEPCO

In this paper, we introduce powerline communication systems in KEPCO is a unique utility and has been leading the Korea PLC technology development. This article provides PLC trial carried out in MV and LV powerline. It contains various information related to system architecture, characteristics of developed devices. Also the future plan is presented.

Developing the IEEE 802.11s based reliable Smart Grid mesh networks

Wireless Mesh Networks are suitable for providing the Smart Grid communications required for high reliability and network capacity. However there still exist several problems disturbing network reliability. In this demonstration, we propose reliable Wireless Mesh Network architecture based on IEEE 802.11s system. We will present our system architecture to increase communication reliability and evaluate the performance by implementing testbed installation.

Study on Device Management for AMI System

In this paper, we present the AMI System mentioned as one of the main application areas in the M2M. To enable the AMI, it is essentially required to install, deploy and manage all the devices. Especially, Device Management technology is considered to be suitable for these AMI due to its advantages like, easy installation, remote FW/SW upgradeability. We investigate the fundamental operation of the DM and the design of the DM in the AMI is presented.

Cyber Threat and a Mitigation Method for the Power Systems in the Smart Grid

Obsolescent control systems for power systems are evolving into intelligent systems and connecting with smart devices to give intelligence to the power systems. As networks of the control system are growing, vulnerability is also increasing. The communication network of distribution areas in the power system connects closely to vulnerable environments. Many cyber-attacks have been founded in the power system, and they could be more critical as the power system becomes more intelligent. From these environment, new communication network architecture and mitigation method against cyber-attacks are needed. Availability and Fault Tree analysis used to show that the proposed system enhances performance of current control systems.

Carbon Emission Analysis Considering Demand Response Effect in TOU Program

Currently, the concern about the environment is the issue all over the world, and in particular, carbon emissions of the power plants will not be able to disregard from the respect of generation cost. This paper proposes DR (demand response) as a method of reducing carbon emissions and therefore, carbon emissions cost. There are a number of studies considering DR, and in this paper, the effect of DR is focused on the side of carbon emission reduction effect considering Time-Of-Use (TOU) program, which is one of the most important economic methods in DSM. Demand-price elasticity matrix is used in this paper to model and analyze DR effect. Carbon emissions is calculated by using the carbon emission coefficient provided by IPCC (Intergovernmental Panel on Climate Change), and generator`s input-output characteristic coefficients are also used to estimate carbon emission cost as well as the amount of carbon emissions. Case study is conducted on the RBTS IEEE with six buses. For the TOU program, it is assumed that parameters of time period partition consist of three time periods (peak, flat, off-peak time period).