Over the past decade, PV power plants have increasingly contributed to generation. However, generation widely varies due environmental factors; thus, accurate forecasting of becomes essential. Meanwhile, weather data for factors include many missing values; example, when we estimated values in precipitation Korea Meteorological Agency, they amounted ~16% from 2015–2016, and further, 19% were 2017. Such deteriorate prediction performance, need be eliminated by filling other values. Here,...

Electric load forecasting for buildings is important as it assists building managers or system operators to plan energy usage and strategize accordingly. Recent increases in the adoption of advanced metering infrastructure (AMI) have made electrical consumption data available, this has increased feasibility data-driven forecasting. Self-organizing map (SOM) been successfully utilized cluster a dataset into subsets containing similar points. These are then used train models improve accuracy....

Integrated energy systems can provide a more efficient supply than individual by using resources such as cogeneration. To foster management of these systems, the flexible operation cogeneration should be considered for generation expansion planning model to satisfy varying demand including heat and electricity, which are interdependent present different seasonal characteristics. We propose an optimization integrated system considering feasible region efficiency combined power (CHP) resource....

With the high penetration level of wind power in systems, generation is necessary to participate scheduling balance supply and demand. If a system operator wants scheduling, should be forecasted accurately. Varying weather conditions constantly subject uncertainty variability, making determination generating capacity difficult for operators. Wind forecasting corrected reduce errors scheduling. This study proposes method correct by considering speed forecast error, which represented normal...

Multi-energy systems can integrate heat and electrical energy efficiently, using resources such as cogeneration. In order to meet demand cost-effectively in a multi-energy system, adopting appropriate at the right time is of great importance. this paper, we propose an expansion planning method for system that supplies energy. The proposed approach formulates mixed integer linear programming (MILP) problem. objective minimize sum annualized cost system. candidate constitute are fuel-based...

We investigated the geometric and chemical factors of nonspherical Janus particles (i.e., ellipsoids) with regard to pinning unpinning behaviors boundary at oil–water interface using attachment energy numerical calculations. The were characterized by aspect ratio (AR) location (α) separating polar apolar regions particle. factor indicated supplementary wettability (β) two sides particle identical deviations apolarity polarity from neutral wetting. These competed each other determine...

With the emergence of virtual power plants (VPPs) in distribution systems, companies (DISCOs) can manage distributed generators scattered across their systems. Interactions between each DISCO and VPP are expected to be crucial for securing system reliability without increasing operational complexity. This article proposes a bi-level scheduling model these interactions, considering ramping flexibility system. In upper level, minimizes system's cost procuring by varying price traded with VPP....

Under the carbon-neutral environment, number of renewable power sources needs to be drastically increased. To respond large variability derived from sources, potential flexible resources have been established and researched. Among these, securing flexibility by using demand is achieved through response. For this purpose, it helpful identify flexumers—consumers with flexibility—for each player involved in characteristics flexumers among consumers, we propose a method classify into four groups...

This study proposes optimal day-ahead demand response (DR) participation strategies and distributed energy resource (DER) management in a residential building under an individual DR contract with grid-system operator. First, this introduces DER system the for to market. The photovoltaic generation (PV) energy-storage (ESS) are applied reduce electricity sell surplus on grid. Among loads building, lighting (LTG) heating, ventilation, air conditioning (HVAC) included program. In addition, it...

As renewable energy penetration in power systems grows, adequate policies are needed to support the system’s operations with flexible resources and adopt more sustainable energies. A peak-biased incentive for storage (ESS) using Korean portfolio standard could make system difficult. For first time research, this study evaluates effect of imposing a certificate off-peak periods on mitigating wind fluctuations. We design coordinated model farm an ESS behavior operators. Optimization problems...

Adequate policies or incentives are needed to support investment in renewable energy industries. However, power plant operators South Korea may face the risk of finding it difficult recoup their capital cost absence a peak-biased incentive for with storage systems (ESS). Incentives forecast accuracy will be adopted after abolition incentive. This study explores impact on operations. In this study, we propose an ESS optimization model combined photovoltaic plant. We design coordinated...

As the share of distributed generation increases, so do opportunities for aggregators to participate in electricity market. In particular, participating both day-ahead and real-time markets contribute improving reliability power system. addition, seeking additional revenue can benefit from providing reserves a joint market environment. However, aggregated resources with uncertainty are limited because uncertain nature reserve provision amount they provide. Therefore, this study proposes...

Distributed energy resources are gaining worldwide momentum as a key strategy for achieving carbon neutrality. However, their inherent volatility and unpredictability pose significant challenges to the stability efficiency of power system operations. In Korean electricity market, incentives forecasting renewable generation inadequate enhancing prediction accuracy. Consequently, there is growing effort develop methods seamlessly integrate aggregated into thereby addressing shortcomings...

Electrostatic is generated through friction or contact between certain materials—a process that frequently occurs in industries such as manufacturing, logistics, electronics, chemicals, petroleum, and gas. In particular, dealing with flammable materials—such petrochemicals, refining, energy, semiconductors, electronics—electrostatic can pose a fire explosion risk, highlighting the critical importance of implementing electrostatic control preventive measures. To manage at safe level, it...

본 논문은 도시철도역사 내 전력부하를 전력계통의 변동성과 불확실성을 완화할 수 있는 자원으로 각광받고 유연수요반응자원으로의 활용 가능성 여부를 판단하였다. 그리고 이 가능한 용량과 지속시간을 분석하는 연구를 진행하였다. 이를 위해 기존 수요반응자원과 다른 유연수요반응자원의 특징을 기술하였고, 전력 부하 중 유연수요반응자원으로 활용가능한 자원들을 분류하였다. 자원들의 분류는 전력부하는 도시철도 관계자의 인터뷰를 바탕으로 수행되었다. 전체 전력부하 부하의 증감이 자유로운 부하들이 차지하는 비중을 분석하였고, 수분 단위로 표현되는 가능량과 분석하기 부하패턴을 사용하여 분석하였다. 이러한 분석결과를 분석 방안을 제안하고자 한다.

Various incentive schemes are being implemented to improve the economic return of distributed energy resources (DERs). Accordingly, research on optimal capacity design and operations photovoltaic (PV) power generation storage systems (ESSs) is important ensure efficiency DERs. This study presents models facility operation methods based long-term operational changes DERs in a building with self-consumption. Key policy variables derived for renewable system. We first analyzed operating...

In this study, uncertainties arising from distributed energy resources (DER) of a commercial building is quantified, and the relationship analyzed between optimal DER operating costs variation uncertainties. Firstly, an optimization algorithm for management introduced. A photovoltaic (PV) generation with storage system (ESS) utilized to reduce peak load consumed by contribute surplus electricity grid system. Demand response (DR) issuance assumed given historical data. An electric vehicle...

최근 고령화 시대의 학령인구 감소, 4차 산업혁명 등 사회적 환경의 급속한 변화에 따라 대학 고유의 경쟁력 확보에 대한 필요성이 대두되고 있으며, 대학의 교육체계 및 교육의 질적 개선에 요구가 크게 증가하고 있다. 이에 본 연구는 교수의 교육경력이나 직급에 적절한 교수역량을 개발시킬 수 있도록 생애주기 맞춤형 교수지원 프로그램의 체계적인 지원방안을 모색하는 것을 목적으로 한다. 이를 위해 연구에서는 기본역량과 강의역량으로 구분하고 17개의 세부 역량을 정의하였으며, 계층화분석법을 적용하여 교수역량의 상대적 중요도를 평가하였다. 또한 직급별 심층 서면 인터뷰를 통해 교수역량에 현재의 요구도를 분석하였으며, 종합하여 로드맵을 도출하였다. 연구가 제시한 교수역량 도출, 중요도 요구도 분석, 로드맵 구축의 전 과정은 혁신적 교수전략 마련을 유용한 정보로 활용될 있을 것이다.

우리나라에서는 유역 특성별 비점오염물질 유출특성을 파악하고 최적관리방안을 도모하기 위해 2000년 이후 다양한 형태의 실험실 규모 또는 실증 최적관리방안(Best Management Practices, BMP) 시설에 대해 연구가 진행되고 있으나 특성상 자정작용의 기회가 주어지지 않는 연안지역에서의 유출특성 및 관리방안에 대한 연구는 미비한 상태이다. 최근 연안지역 개발에 따른 불투수층 비율은 지속적으로 증가하고 있으나, 초기우수의 직접유출을 방지하기 위한 완충 시설 최적관리방안 시설은 전무한 본 논문에서는 충남 보령시 대천항 주차장을 중심으로 연안 지역의 파악하고, 이를 저감하기 설정하여 비점오염원 관리에 기초자료를 제공하였다. 연안지역은 지역특성상 해안과 접하고 있기 때문에 지하수위가 낮고 경사차가 크지 않은 평탄한 지형을 이루고 있다. 즉, 선정하는데 있어 유출입구의 수두확보문제와 굴착 깊이에 제한을 받으며, 인공습지 저류지와 같은 대규모 저류형 시설의 입지조건으로는...

Aggregators of distributed energy resources and consumers in the system can transact electricity with various ways. The aggregators contract appropriate power generation or demand due to advances communication. Although would not others conventional system, necessity transaction between them will increase decentralized system. adequate operation strategies for are required enhance their contracts benefit. In this study, we propose an strategy order maximize social welfare. proposed model...