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태양광 발전시스템의 신뢰성 향상을 위한 태양전지의 PID 저감 기술의 타당성 검토
백성선(Sungsun Baik),백승엽(Seungyup Baek),정태욱(Tae-Wook Jung),조진형(Jin-Hyng, Cho) 한국산업경영시스템학회 2013 한국산업경영시스템학회지 Vol.36 No.2
In recent years, anti-PID (Potential Induced Degradation) technologies have been studied and developed at various stages throughout the solar value chain from solar cells to systems in an effort to enhance long-term reliability of the photovoltaics (PV) system. Such technologies and applications must bring in profits economically for both manufacturers of solar cell/module and investors of PV systems, simultaneously for the development of the PV industry. In this study two selected anti-PID technologies, ES (modification of emitter structure) and ARC (modification of anti-reflective coating) were compared based on the economic features of both a cell maker with 60MW production capacity and an investor of 1MW PV power plant. As a result of this study, it is shown that ARC anti-PID technology can ensure more profits over ES technology for both the cell manufacturer and the investor of PV power plant.
이호승(Hoseung Lee),백승엽(Seungyup Baek),이재익(Jaeik Lee),이재천(Jae-Cheon Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The state of road changes quite often due to the automobiles and pedestrians when the autonomous driving controls the vehicles along the planned path. The vehicle acknowledges of whether there are obstacles on the driving path using a sensor and it creates the new driving path and modifies the current path to control the vehicle. This research presents the way to find the possible driving way through the sensor which spreads the info about the recognized obstacles. With the possible driving field, we can recognize whether the current path would be affected by the obstacles, and also the possibility to create the new driving road. Using the driving map created by this way, we made a new driving path applying a algorithm A<SUP>*</SUP> and tested on the converted car. As a result, after creating the new driving path, we were able to carry out the avoidance driving safely at low speed, also the vehicle drives swiftly and smoothly when we modified the avoidance path within the possible driving field.
신동환(Donghwan Shin),백승엽(Seungyup Baek),이율호(Yulho Lee),강상규(Sanggyu Kang) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
A latest korea electricity market participants are compensated their profits by system marginal price (SMP) determined at the korea power exchange (KPX). SMP is the most expensive price of an operated power generator at each hour and which is influenced by many external factor. SMP forecasting is important for profit maximization of power generation businessman. In this study, a SMP time series data forecasting model have been developed using MATLAB Neural Net Time Series<SUP>®</SUP> to predict the short-term SMP. preprocessing has been conducted to decrease a mean squared error (MSE) by comparing with gradient of present value and previous value. Moving average is used as an exogenous variable and nonlinear autoregressive exogenous (NARX) network is used for data training. One month forecasting along the moving average change has been compared. Training model shows that the MSE is influenced strongly by the preprocessing and it can be decreased by iteration in the filtering process. For more accuracy forecasting, another exogenous variables have to be investigated such as global oil price, tax, electricity demand. Another filtering and training methods also have to be compared for model optimization.
가상 발전소의 기능적 특징을 고려한 사용자 중심 LDS 인터페이스 디자인
안선영(Sunyoung Ahn),하태현(Taehyun Ha),김상연(Sangyeon Kim),백승엽(Seungyup Baek),조영혁(Younghyeok Cho),최원용(Won-Yong Choi),이상원(Sangwon Lee) 대한인간공학회 2019 大韓人間工學會誌 Vol.38 No.1
Objective: This study proposes a user interface design guideline for large display systems (LDSs) in virtual power plants (VPPs) to support the effective management of power resources. Background: VPP is a technology which enables to manage unstable distributed power resources effectively. To achieve efficient management, a proper user interface needs to be suggested considering the technical aspects of VPP. Method: Based on a technical specification of VPP, we draw a hierarchical information architecture for VPP operations and suggest proper ways of the information visualization and color application for user interface design. Results: We present an example of interface design for LDS in VPP with some general design guidelines. Conclusion: To develop a proper interface of LDS in VPP, designers need to 1) identify an information architecture for VPP operations, 2) place functional modules in LDS considering hierarchical properties of the information architecture, and 3) visualize the modules focusing on the brightness and conventional rules of design. Application: The results of this study can be applied to construct a user interface system of VPP.