• 대한전기학회논문지:전력기술부문A
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• 제53권7호
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• pp.405-413
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• 2004

Traditionally, electrical power systems had the vertically-integrated industry structures based on the economics of scale. However power systems have been recently reformed to increase the energy efficiency of the power system. According to these trends, Korean power industry has been partially restructured, and the competitive generation market was opened in 2001. In competitive electric markets, correct demand data are one of the most important issue to maintain the flexible electric markets as well as the reliable power systems. However, the measuring load data can have the uncertainty because of mechanical trouble, communication jamming, and other things. To obtain the reliable load data, an efficient evaluation technique to adust the missing load data is needed. This paper analyzes the load pattern of historical real data and then the turned ARIMA (Autoregressive Integrated Moving Average) model, PCHIP(Piecewise Cubic Interporation) and Branch & Bound method are applied to seek the missing parameters. The proposed method is tested under a variety of conditions and tested with historical measured data from the Korea Energy Management Corporation (KEMCO).

• 조명전기설비학회논문지
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• 제28권6호
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• pp.40-44
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• 2014

In this paper, maximum power is the lowering device using the facility's energy use and peak load electricity through analyzing attitude should like to make it reduce its power base rate. Simulator to manage the demand for power, a maximum electric power base power from electronic watt-hour meters by a device's signal, predictive power, the current power by computing the goal of power for less than Maximum peak power and peak shift, so that you can manage, and peak York, which role you want a cut Metal heat treatment result which analyzes the data, demand for electricity company over the years of analyzing the characteristics of each load, and effects and Reducing power consumption device every month identified seven Sequence control to the load system and successful power control is about showing that the defined goals.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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• pp.393-396
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• 2007

Recently one level higher intelligent switching board than established one by the application of intelligent building and digital system are being constructed. Therefore facility's high efficiency, high degree satisfaction, miniaturaization, standardization through application of communication technology and monitoring and controlling by computer system utilized by web-basis power control system and electric IT are practiced. Especially network must be constructed through unified IBS server that monitors every educational institute's switching boards in real time control system. And I intend to create methods to save energy and raise electricity quality by power demand prediction and remote-controled management and operation. In this thesis I intend to suggest measures of forming unified system through researching educational institute's ways of constructing switching board and status analysis and overcoming technical difficulties in user's side and saving and maintenance expense.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 추계학술대회 논문집
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• pp.33-34
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• 2012

As the distributed power system with PV and ESS is highlighted to be one of the most prominent structure to replace the traditional electric power system, power flow scheduling is expected to bring better system efficiency. Optimal energy management system (EMS) where the power from PV and the grid is managed in time-domain using ESS needs an optimization process. In this paper, main optimization method is implemented using dynamic programming (DP). To overcome the drawback of DP in which ideal future information is required, prediction stage precedes every EMS execution. A simple auto-regressive moving-average (ARMA) forecasting followed by a PI-controller updates the prediction data. Assessment of the on-line optimal EMS scheme has been evaluated on several cases.

• 전기학회논문지P
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• 제60권1호
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• pp.32-36
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• 2011

In this study, authors have proposed the autonomous state estimation which has been composed with IEC61850, GPS time synchronization and objective model design concept. The proposed method is able to supervise/correct measurement and communication error from SCADA. The major advantages of the proposed autonomous state estimation are that it is possible to evaluate integrity of data measured and transferred from SCADA, to reduce human intervention and to expense national-size applications such as EMS (Energy Management System), WAMS (Wide Area Monitoring System) or WAPS (Wide Area Protection System). This study addresses the issues related to the operation of the smart grid and proposes a new automated approach to achieve this goal. Through applying the proposed system to IEEE 14-bus test electric system, we prove the possibility of the proposed idea.

• 신재생에너지
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• 제18권3호
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• pp.32-42
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• 2022

Rapid spread of intermittent renewable energy has amplified the instability and uncertainty of power systems. The Korea Power Exchange (KPX) promoted efficient management by opening the power brokerage market in 2019. By combining small-scale intermittent renewable energy with a flexible facility through the power brokerage market, the KPX aims to develop a virtual power plant system that will allow the conversion of existing intermittent renewable energy into collective power plants. However, the participation rate of renewable power owners in the power brokerage market is relatively low because other markets such as the small solar power contract market or the Korea Electric Power Corporation power purchase agreement are more profitable. In this study, we used a choice experiment to determine the attributes affecting the participation rate in the power brokerage market for 113 renewable power owners and estimate the value of the power brokerage market. According to the estimation results, a low smart meter installation cost, low profit variations, long contract periods, and few clearances increased the probability of participation. Moreover, the average value of the power brokerage market was estimated to be 2.63 million KRW per power owner.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.601-604
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• 2012

최근 유 무선 통신을 이용하여 원격으로 기기의 상태나 센서 등의 입력장치를 모니터링하거나 출력장치를 제어하기 위한 여러 가지 많은 시도가 있었으며 이에 대한 연구 및 개발도 활발하게 진행되고 있다. 본 논문에서는 다수의 세대를 가지고 있는 아파트의 관리사무소와 세대 사이에 전용 통신망을 개설하여 세대에서 사용하는 전력의 사용량을 입주자가 부재시에도 원격으로 전력 사용량을 검침하고 컴퓨터로 에너지 사용량을 정확하게 검침함으로서 검침요원의 수동검침으로 인한 오류를 없애 입주자와 관리자간의 신뢰성을 확보할 수 있는 모니터링 시스템을 개발한다.

• Journal of Electrical Engineering and Technology
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• 제2권1호
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• pp.42-49
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• 2007

For electricity markets to function in a truly competitive and efficient manner, it is not enough to focus solely on improving the efficiencies of power supply. To recognize price-responsive load as a reliability resource, the customer must be provided with price signals and an instrument to respond to these signals, preferably automatically. This paper attempts to develop the Windows-based load management system in competitive electricity markets, allowing the user to monitor the current energy consumption or billing information, to analyze the historical data, and to implement the consumption strategy for cost savings with nine possible scenarios adopted. Finally, this modeling framework will serve as a template containing the basic concepts that any load management system should address.

• 한국융합학회논문지
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• 제12권4호
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• pp.1-8
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• 2021

현재 자동차를 포함한 에너지 저장장치 제품에는 리튬 이온 배터리가 주로 사용되고 있으며, 이를 과충전하거나, 고온 상황에 방치하는 잘못된 배터리 관리 상황 발생시 폭발 등 위험한 상황에 노출될 수 있으며, 과방전 시 배터리 불능 상황을 야기한다. 이로 인해 배터리 상태를 관리해주는 시스템이 필요하며 배터리 관리 시스템은 배터리 상태를 정확하게 인지하고 각 셀의 전압을 일정하게 유지하여 최적의 배터리 효율을 얻는 데 목적이 있다. 본 논문에서는 일반적 리튬이온배터리에 비해 고안전성을 갖는 리튬인산철 배터리팩과 이를 관리하기 위해 Matlab Simulink 기반의 시뮬레이션을 사용하여 셀 특성을 확인할 수 있는 RC등가회로 모델을 이용한 분석방법을 제시하고, 저전력 및 상호통신간섭이 적은 블루투스 기반 BMS 모듈의 알고리즘을 개발하였다.

• 한국환경기술학회지
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• 제19권6호
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• pp.576-585
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• 2018

상하수도를 포함하는 7대 지하매설배관(상수도, 하수도, 전기, 통신, 가스, 난방, 송유)은 시공에서부터 운영 및 유지관리에 걸친 전 생애 주기 동안 체계적인 관리가 매우 중요하다. 특히, 지하매설배관의 전생애주기에 가장 큰 영항을 미치는 것은 시공과정이다. 새로운 도시를 건설하거나 서로 다른 지하매설배관을 유지관리하기 위해서는 매번 땅을 파고 시공 및 관련 작업을 수행해야 한다. 이 과정에 먼저 시공한 배관은 후에 시공하는 배관 시공 과정에 2차 및 3차 파손이 빈번하게 발생할 수 있는 가능성이 있다. 이 문제를 해결하기 위해서는 시공 과정에 일어나는 파손을 실시간으로 감시할 수 있는 시스템이 필요하다. 또한 지하매설배관의 환경에 따라 시스템의 지속적으로 운영하기 위한 전력의 공급이 제한되는 경우가 많아 기존 전력이 아닌 자연에너지를 이용한 안정적인 전력공급 시스템의 개발이 필요하다. 본 연구에서는 풍력과 태양광을 이용한 자연에너지를 이용하여 배관감시 시스템을 장기간(24시간 15일) 안정적으로 운영이 가능한 장치를 개발하였으며 이를 현장시험을 거쳐 운전성능을 확인하였다.