• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2002.07b
• /
• pp.1093-1096
• /
• 2002

In this paper, a novel multi voltage inverter system is proposed for reductions of harmonics, which can compensate reactive power. At first, we remove capacitor at input side for reactive power compensation. Secondly, by adding DC voltage to the filter capacitor, it can control power factors as lead-phase according to alterations of loads at power reception. Thirdly, if winding and single phase-bridge inverter(auxiliary circuit) is installed to DC power for reduction of harmonic, waveform of output voltages become to 36-steps. Thus, SVC(static var compensator) systems which can reduce harmonics are designed.

• Proceedings of the KIEE Conference
• /
• 2006.07a
• /
• pp.87-88
• /
• 2006

Generator has responded quickly with variation of power system voltage and is controlled at real time. As a reactive power source, generator is revalued better than power condenser and as a reactive power sink, is revalued. But Domestic generators scarcely have been tested and operated to reactive power capability. In case of power system fault, operators wouldn't quickly take a follow-up measures about reactive power disturbance. Therefore generator reactive power capability verification strategy must be developed, several generators is tested as a exhibition since 2004. This paper is extract from the test contents.

• Proceedings of the KIEE Conference
• /
• 2008.07a
• /
• pp.282-283
• /
• 2008

This paper presents a overall study results for the Korea power system at yearly peak load time in 2008 summer period. The power system become more complex due to the gradual increase of power demand. We analyze the problems in power system operation, by the use of PSS/E(power flow, fault and transient stability study) and VSAT for voltage stability. The results of establishment of power system operating plan and countermeasure are described.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.57 no.8
• /
• pp.1327-1333
• /
• 2008

Since Cost Based Pool markets has been continued to power markets, Genco. needs economic analysis about investment in power plants. Particularly most Private Genco.s have presently a construction plan about LNG combined cycle thermal power plants. In this paper, we propose a economic analysis method of LNG combined cycle thermal power plants using Economic Dispatch and Optimal Power Flow in CBP markets. Also we develope computation model using it for decision making to build a plant. This method can consider a variation of power facility like power plants and transmission lines in CBP markets. Finally, this dissertation provides a relevant case study to confirm the effect of cost factor to economical efficiency.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.416-417
• /
• 2007

With the benifit of telecommunication and IT technologies, Real-time Power system analysis having been gradually progressed. The power system become more complex due to the gradual increment of power demand. We analyze the problems in power system operation, by the use of PSS/E(power flow, fault and transient stability study) and VSAT for voltage stability. The results of establishment of power system operating plan and countermeasure are described.

• Journal of the military operations research society of Korea
• /
• v.30 no.1
• /
• pp.1-14
• /
• 2004

In this paper, we propose a new data-mining-based methodology for military occupational specialty assignment. The proposed methodology consists of two phases, feature selection and man-power assignment. In the first phase, the k-means partitioning algorithm and the optimal variable weighting algorithm are used to determine attribute weights. We address limitations of the optimal variable weighting algorithm and suggest a quadratic programming model that can handle categorical variables and non-contributory trivial variables. In the second phase, we present an integer programming model to deal with a man-power assignment problem. In the model, constraints on demand-supply requirements and training capacity are considered. Moreover, the attribute weights obtained in the first phase for each specialty are used to measure dissimilarity. Results of a computational experiment using real-world data are provided along with some analysis.

• 제어로봇시스템학회:학술대회논문집
• /
• 1996.10b
• /
• pp.511-515
• /
• 1996

A remote controlled mobile robot system has been developed and tested to monitor the radiation area in the nuclear power plant. The mobile robot system operates according to car-driving-like commands and is capable of radiation measurement and visual inspection in unmanned situations under radiation. The robot system is equipped with a radiation sensor and two cameras with appropriate illumination set-ups. The camera with auto-focus function and 8-times zoom lens is mounted on the pan/tilt rotational base and the other is mounted on the front panel of the robot system. All commands regarding the motion of the mobile robot and various sensors are given through the monitoring system which is designed to provide an integrated man-machine interface.

• Journal of the Korean Institute of Rural Architecture
• /
• v.9 no.3
• /
• pp.55-62
• /
• 2007

Since the human race set foot on the earth, an unremitting effort to the free oneself from the fear of death. It was used ways and means like religion, power and a war to this end that the achievements of one's lifetime for a great man have power and wealth proved. But, there are remain proposition, all man will be die in spite of a lot of effort. The purpose of this study is recognize theoretical background of funeral culture based on present studies and a recent statistical data, and provide data for err from the right path of a funeral policy and improve consciousness of person. And, There wish inflected a basic data when Architectural Planning of funeral facilities to institutional background and facilities situation.

• Journal of Power System Engineering
• /
• v.9 no.4
• /
• pp.187-193
• /
• 2005

In this paper, we proposes a man-machine interface design for fault diagnosis system with inter-node search method in a Petri net model. First, complicated fault cases are modeled as the Petri net graph expressions. Next, to find out causes of the faults on which we focus, a Petri net model is analyzed using the backward reasoning of transition-invariance in the Petri net. In this step, the inter-node search method algorithm is applied to the Petri net model for reducing the range of sources in faults. Finally, the proposed method is applied to a fault diagnosis of a refrigeration system to confirm the validity of the proposed method.

• Nuclear Engineering and Technology
• /
• v.32 no.1
• /
• pp.88-98
• /
• 2000

More than half of all incidents in large complex technological systems, particularly in nuclear power or aviation industries, were attributable in some way to human erroneous actions. These incidents were largely due to the human engineering deficiencies of man-machine interface (MMI). In nuclear industry, advanced computer-based MMI designs are emerging as part of new reactor designs. The impact of advanced MMI technology on the operator performance, and as a result, on plant safety should be thoroughly evaluated before such technology is actually adopted in nuclear power plants. This paper discusses the applicability of human reliability analysis (HRA) to support the design review process. Both the first-generation and the second-generation HRA methods are considered focusing on a couple of promising HRA methods, i.e., ATHEANA and CREAM, with the potential to assist the design review process.