Eel-Hwan Kim

Jeju National University, Tse-tsiu, Jeju, South Korea

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Publications (9)1.75 Total impact

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    ABSTRACT: This paper presents modeling and impact analysis of wind farms in Jeju island power system, which is made of wind farms, a current source-type high-voltage, direct current (HVDC) system, and thermal power plants. In this paper, four kinds of major components are modeled: a total of 88 MW wind farms, a 300 MW HVDC system, thermal power plants, and the Jeju power system load. To analyze the impact of the wind power generation to the Jeju power system, simulation is carried out for two case studies by using the PSCAD/EMTDC program. One is for the steady-state operation under different wind speed, and the other is for the transient-state operation when all wind farms are disconnected suddenly from the Jeju power grid due to the wind speed higher than the rated value. These comparative studies have been effective in accessing the impact of wind power generation on the Jeju island power system stability.
    IEEE Systems Journal 01/2012; 6:134-139. · 1.75 Impact Factor
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    Jae-Hong Kim, Eel-Hwan Kim
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    ABSTRACT: This paper proposes a new control scheme of lithium ion battery units based on single phase multi-level converter. In the DC/AC converter applications using battery storage system, it is necessary to control the balancing voltage of individual battery units for high efficiency utilization. Using the proposed control scheme, the DC/AC single phase converter system is applied. To verify the effectiveness of the proposed control scheme, computer simulation is accomplished. In the computer simulation, lithium-ion battery units and single phase multi-level converter system are modeled and carried out using Psim simulation program. It will be helpful for design and applications of energy storage system with lithium-ion battery.
    Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. 01/2011; 25(6).
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    ABSTRACT: The power quality of wind energy becomes more and more important in connecting wind-farms to the grid, especially weak grid. This paper presents the simulation of a wind farm of a permanent magnet synchronous generator (PMSG) and a doubly fed induction generator (DFIG). Flicker mitigation is performed by using PMSG as a static synchronous compensator (STATCOM) to regulate the voltage at the point of common coupling (PCC). A benefit of the measure is that integrating two function of to control the active power flow and to reduce the voltage flicker in a wind farm. Simulation results show that controlling PMSG is an effective and economic measure in reducing the flicker during continuous operation of grid connected wind turbines regardless of short circuit capacity ratio, turbulence intensity and grid impedance angle.
    Journal of Institute of Control, Robotics and Systems. 01/2009; 15(12).
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    ABSTRACT: This paper presents the power quality analysis of Jeju island power system connected with wind farms during HVDC system overhaul period on the wind power fluctuation. It is for indicating the influence of wind farm operation in steady and transient state in Jeju island power system. For the computer simulation, three kinds of main item are modeled, which are several wind farms, thermal power plants and Jeju power loads. To analyze the influence of the wind power generation to the Jeju power system on the diverse power penetration, two kinds of simulations are carried out by using the PSCAD/EMTDC program. One is the steady state operation when several wind farms in Jeju island are disconnected from the Jeju power grid instantaneously. With the comparison of these results, it is useful for analyzing the power quality of Jeju power system for penetrating the wind farms to the power grid without any harmful effect.
    01/2009;
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    ABSTRACT: This paper presents the modeling of Jeju island power grid system connected with wind farm, current source type HVDC system, and thermal power plant using PSCAD/EMTDC. It is for analyzing the characteristics of thermal power plant, HVDC system and wind farm operation in steady and transient state. For the computer simulation, four kinds of main items are modeled, which are 83(MW) wind farm, 300(MW) HVDC system, thermal power plant and Jeju power grid load. To analyze the influence of the wind power generation in Jeju power grid system, two kinds of simulations are carried out. One is the steady state operation under the variable wind speed, and the other is the transient state operation when all of wind farms in Jeju island are disconnected from the Jeju power grid instantaneously due to the over rated wind speed. With the simulation results, it is useful to analyze the operating characteristics of power thermal plant, HVDC system, and wind farms on Jeju island power grid system, and the system stabilities.
    01/2008;
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    ABSTRACT: This paper presents the modeling and power quality analysis of Jeju island power system connected with wind farm, current source type HVDC system, and thermal power plant. It is for indicating the influence of wind farm operation in steady and transient state in Jeju island power system. For the computer simulation, four kinds of main items are modeled, which are 83 (MW) wind farm, 300 (MW) HVDC system, thermal power plant, and Jeju power load. To analyze the influence of the wind power generation to the Jeju power system, two kinds of simulations are carried out by using the PSCAD/EMTDC program. One is the steady state operation under the different wind speeds, and the other is the transient state operation when all of wind farms in Jeju island are disconnected from the Jeju power grid instantaneously due to the over wind speed than the rated value. These comparative studies are useful to analyze the influence of wind farms on the Jeju island power system stability.
    01/2008;
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    ABSTRACT: This paper presents the modeling and analysis of Jeju power system operation connected with wind farm and HVDC system using PSCAD/EMTDC program. It is for indicating the influence of wind farm operation in Jeju power system. For the computer simulation, there are three main models, which are 100(MW) wind farm, 300(MW) HVDC system and Jeju power load. To verify the effectiveness of the proposed method, two kinds of simulation are carried out . One is the 50(MW) cut off and the other is 100(MW) cut off from the Jeju power grid instantaneously over the rated wind velocity . With the comparison of these results, this method shows the excellent performance. So it is very useful for understanding and applications of linking the wind farm to the power grid.
    Power Electronics, 2007. ICPE '07. 7th Internatonal Conference on; 11/2007
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    Se-Ho Kim, Eel-Hwan Kim, Jonhg-Chul Huh
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    ABSTRACT: The number of wind generation installations are growing substantially in Jeju, Korea. Many of these installations are significant in size and directly connected to the distribution system. Utility grid interconnection standards for interconnecting non-utility distributed generation systems are essential to both power system company and generation company. These interconnection standards are important to utilities, customers, wind generation manufactures and nation. In this paper, it is investigated the voltage quality and the suitability of Jeju-Hangwon wind power generation farm by network interconnection technology standard.
    Journal of the Korean Solar Energy Society. 01/2006; 26(2).
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    ABSTRACT: This paper presents the simulation modeling and analysis of variable wind speed turbine system(VWTS) using the doubly fed induction generator(DFIG) connected the back to back converter system in the rotor side. In the simulation, using the model system which has the 660[kW] rated power, blade control and the dual converter system are modeled for verifying the control characteristics. The VWTS is controlled by the optimal pitch angle for maximum output power under the rated wind speed, and for the rated output power over the rated wind speed. And also power factor is controlled by the reactive power. To verify the effectiveness of the proposed method, simulation results are compared with the actual data from the V47 VWTS located in Hangwon wind farm in Jeju-Do. According to the comparison of these results, this method shows excellent performance.
    Journal of the Korean Institute of Illuminating and Electrical Installation Engineers. 01/2005; 19(8).

Publication Stats

2 Citations
1.75 Total Impact Points

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Institutions

  • 2012
    • Jeju National University
      • Department of Electrical Engineering
      Tse-tsiu, Jeju, South Korea