• New & Renewable Energy
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• v.18 no.3
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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.

• Construction Engineering and Management
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• v.16 no.6
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• pp.32-40
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• 2015

• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.535-535
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• 2001

• Korean Journal of Construction Engineering and Management
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• v.22 no.1
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• pp.63-71
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• 2021

The construction guarantee market is a rear market affected by changes in the construction industry and market. As the restructuring of the construction industry's production system is being carried out, such as the abolition of regulations on business field between general and specialty contractors, major changes are expected not only in the construction market but also in the construction guarantee market. In construction guarantee market, there are currently three Contractor Financial Cooperatives, which are divided based on business field and business type(General, Specialty and Plant & Mechanical). The abolition of business field regulation will have various effects on construction guarantee market, such as forming a competitive structure among the three Contractor Financial Cooperatives. Therefore the role of the construction guarantee institutions are also required to change. This study predicted the changes in the construction guarantee market after the restructuring of construction industry and analyzed the ripple effect on the market. This study reviewed the details of the reorganization plan on the construction industry, policies and statistical data related to construction guarantee, and lastly conducted the survey on each member of the three Contractor Financial Cooperatives to analyze the usage behavior in the future guarantee market. Based on the result of this study, the members of both the General Contractor Financial Cooperative and Specialty Contractor Financial Cooperative are not willing to change the existing institutions, but a lot of them are expected to use other institutions in duplicate. The members of the Plant & Mechanical Contractor Financial Cooperative are most willing to use other guarantee institutions.

• Journal of Electrical Engineering and Technology
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• v.12 no.6
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• pp.2127-2137
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• 2017

A virtual power plant (VPP) is a system that virtually integrates power resources based on the VPP participating customer (VPC) unit and operates as a power plant. When VPP operators manage resources to maximize their benefits, load reduction instructions may focus on more responsive VPCs, or those producing high profitability, by using VPC resources with high operation efficiency. VPCs may thus encounter imbalance problems during operation. This imbalance in operation time would bring more participation for some VPCs, causing potential degradation of their resources. Such an operation strategy would be not preferable for VPP operators in managing the relationship with VPCs. This issue impedes both continual VPC participation and economical and reliable VPP operation in the long term. An operation algorithm is therefore proposed that considers the operation time of VPC generators for mandatory reduction of power resource consumption. The algorithm is based on constraints of daily and annual operation times when VPP operators of local generators perform capacity-market power transactions. The algorithm maximizes the operator benefit through VPP operations. The algorithm implements a penalty parameter for imbalances in operation times spent by VPC generators in fulfilling their obligations. An evaluation was conducted on VPP operational effects by applying the algorithm to the Korean power market.

• Proceedings of the Korea Society for Simulation Conference
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• 2001.10a
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• pp.340-345
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• 2001

Electric power market in Japan is now on the trend of deregulation and privatization just like in Europe and the United States. And various approaches for risk management have been investigated taking the electric power price fluctuation after the deregulation into account. The behavior of the investment in power generation plants has not, however, been studied in detail yet due to the complexity of the problem. The problem of the investment in the deregulated power market is that of autonomous decentralized decision-making system, which includes various kinds of decision-makers, that is, power producers called IPPS Each generator has its own criteria for plant investment. Therefore, the total behavior of the decentralized power market will be so complicated, and normative approach will not be applicable fur this analysis. We have developed a simulation-based system fur behavioral analysis and also the framework design of the decentralized power market.

• Journal of Navigation and Port Research
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• v.38 no.2
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• pp.163-170
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• 2014

Domestic offshore business is oriented toward building drill-ships, FPSOs(Floating Production Storage and Off loading). But the equipments needed for offshore platforms are not so developed in Korea because the equipments can not be verified in Korean territory where the offshore platforms are not stationed. This study aims at finding some methods on entering into OSI for the maintenance and disassembly of fixed offshore platforms. Slack model is adopted to find out how slack assets could play a role in penetrating foreign markets. Firstly, entry into the South East Asian market is recommended. Secondly, forming a consortium is suggested by which taking part in offshore market can be easier. Finally, strategic plans for obtaining the technology for ship building equipments are needed as well as government support.

• Korean Journal of Agricultural Science
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• v.29 no.1
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• pp.24-31
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• 2002

This experiment was conducted to improve the market quality of fresh strawberries through postharvest treatment of $CO_2$ at commercial level. Postharvest application of $CO_2$ increased flesh firmness regardless of ripeness of strawberries. Firmness further increased in berries of full maturity but the actual firmness was higher in less mature berries. The optimal condition of $CO_2$ treatment was above 15% of $CO_2$ for 4 hours during cooling of harvested fruit. Residual effect of firmness increase was remained until simulated shipment as well as retail condition for 1 days at ambient temperature. Market quality of full ripe fruit at harvest significantly reduced due turning skin color to dark red and dryness of physically injured surface. Result indicated that a short term application of $CO_2$ during cooling has a benefit for keeping freshness of strawberries during export and local marketing.

• Journal of Convergence for Information Technology
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• v.8 no.6
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• pp.389-397
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• 2018

Recently, Global Shale gas development has expanded, increasing shale gas production has transformed the energy market.As a result of the reduction of energy facilities, in order to overcome the management deterioration of domestic casting valve industry and enter the enlarged shale gas plant, tried to confirm the SWOT factor through the second questionnaire based on the questionnaire survey of related industry experts and previous studies. As a strength-strategy, presented three factors besides collaboration with domestic companies, suggested four factors including product development specialized in shale gas plant as a weakness complement. Thesis offer to scholarly-Practical implications, Internal-external environmental factors, strategization for entering New energy market. thesis offer to scholarly, Practical implications, environmental factors, strategization for entering New energy market. After, analyze a important of research strategy, would like to study the impact on the company according to the ranking of importance.

• Journal of Veterinary Clinics
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• v.36 no.1
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• pp.1-6
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• 2019

This study reviewed the trends and prospect of the market for veterinary medical devices in Korea. The registration of veterinary medical devices has sharply increased since 2013, and a total of 2,133 products from 348 companies were registered by 2018. Of these products, the proportion of the instrument, in vitro diagnostic (IVD) reagents, medical only used for animal and supplies were 51.6%, 35.7%, 7.6% and 5.1%, respectively. The sales amount of veterinary medical devices is approximately 95.8 billion won in 2017. The sales of domestic consumption and imports were 53.9 and 41.9 billion won, respectively. They are increasing 14.9% (CAGR) in the domestic consumption, and 44.0% (CAGR) in the export from 2011 to 2017, respectively. The proportion of IVD reagents, instrument, medical only used for animal and supplies were 54.2%, 41.0%, 3.8%, and 1.0%, respectively. The top 10 items with high sales were IVD reagents for clinical immunochemistry, visceral function testing instrument, hematological testing apparatus, syringes, IVD reagents for molecular genetics, etc. They are widely used from 3,926 animal hospitals in 2017. This study suggested that registration and sales of veterinary medical devices have gradually increased since 2013 as the demand of health care services for various animals. Therefore, the veterinary medical devices industry is expected to grow in the future.