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Seung-Ho Song
Department of Electrical Engineering, Kwangwoon University, Nowon-gu, Seoul 01897, South Korea

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Journal article
Published: 25 June 2020 in New & Renewable Energy
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ACS Style

Tae-Hyung Kim; Seung-Ho Song. Employment Statistics on Wind Energy and Analysis of Employment Effects of Korean Government’s R&D Investment in Wind Power. New & Renewable Energy 2020, 16, 28 -34.

AMA Style

Tae-Hyung Kim, Seung-Ho Song. Employment Statistics on Wind Energy and Analysis of Employment Effects of Korean Government’s R&D Investment in Wind Power. New & Renewable Energy. 2020; 16 (2):28-34.

Chicago/Turabian Style

Tae-Hyung Kim; Seung-Ho Song. 2020. "Employment Statistics on Wind Energy and Analysis of Employment Effects of Korean Government’s R&D Investment in Wind Power." New & Renewable Energy 16, no. 2: 28-34.

Journal article
Published: 25 June 2020 in Ain Shams Engineering Journal
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Shunt capacitor banks (SCBs) are used in distribution systems for loss reduction, voltage stability improvement for the system nodes, and system capacity release. However, the size of these capacitors and their placement locations are design factors that have been considered as single or multi-objectives to derive maximum benefits from their installation. To find the optimal location and size of the SCBs, this study proposes the application of multi-objective salp swarm algorithms, considered at ambient temperature, in radial distribution systems. Additionally, a fuzzy-based mechanism has been utilized to identify the best-fit solution of three different objective functions. The proposed method is implemented on IEEE 15-bus and 33-bus radial distribution systems, as well as on real data taken from the Saudi Electricity Company. The results indicate improved effectiveness and higher capability of the proposed method.

ACS Style

Essam A. Al-Ammar; Ghazi A. Ghazi; Wonsuk Ko; Yasin Khan; Abderrahmane Beroual; Junhee Hong; Seung-Ho Song. Comprehensive impact analysis of ambient temperature on multi-objective capacitor placements in a radial distribution system. Ain Shams Engineering Journal 2020, 12, 717 -727.

AMA Style

Essam A. Al-Ammar, Ghazi A. Ghazi, Wonsuk Ko, Yasin Khan, Abderrahmane Beroual, Junhee Hong, Seung-Ho Song. Comprehensive impact analysis of ambient temperature on multi-objective capacitor placements in a radial distribution system. Ain Shams Engineering Journal. 2020; 12 (1):717-727.

Chicago/Turabian Style

Essam A. Al-Ammar; Ghazi A. Ghazi; Wonsuk Ko; Yasin Khan; Abderrahmane Beroual; Junhee Hong; Seung-Ho Song. 2020. "Comprehensive impact analysis of ambient temperature on multi-objective capacitor placements in a radial distribution system." Ain Shams Engineering Journal 12, no. 1: 717-727.

Journal article
Published: 21 April 2020 in Energies
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A high penetration of distributed generators, such as solar and wind power generators in low voltage network systems, impose voltage rise problems. Reactive power control of distributed generators can contribute to mitigating the voltage rise. In the existing reactive power control, reactive power was controlled using only one local variable, such as voltage at point of connection or the active power output of distributed generator. In case of PF(P) method, which provides certain power factors, depending on the active power of distributed generator, the voltage regulation ability is strong, but network losses are large. Q(V) method, which provides a certain amount of reactive power depending on the local voltage, has few network losses, but the voltage regulation ability is weak. In this paper, a reactive power control method that combines the PF(P) method and Q(V) method was proposed. The proposed method determines the reactive power output by using the active power of the distributed generator and local voltage variables together. The proposed method improves the voltage regulation ability of the reactive power control, while reducing the network losses, as compared to the existing method. The low voltage network system was modeled and simulated to evaluate the performance of the proposed method, in terms of voltage regulation ability and network losses, and the performance of the proposed method and the existing method were compared and analyzed.

ACS Style

Soo-Bin Kim; Seung-Ho Song. A Hybrid Reactive Power Control Method of Distributed Generation to Mitigate Voltage Rise in Low-Voltage Grid. Energies 2020, 13, 2078 .

AMA Style

Soo-Bin Kim, Seung-Ho Song. A Hybrid Reactive Power Control Method of Distributed Generation to Mitigate Voltage Rise in Low-Voltage Grid. Energies. 2020; 13 (8):2078.

Chicago/Turabian Style

Soo-Bin Kim; Seung-Ho Song. 2020. "A Hybrid Reactive Power Control Method of Distributed Generation to Mitigate Voltage Rise in Low-Voltage Grid." Energies 13, no. 8: 2078.

Journal article
Published: 04 March 2020 in Applied Sciences
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In this paper, we show the development of a demand-side management solution (DSMS) for demand response (DR) aggregator and actual demand response operation cases in South Korea. To show an experience, Korea’s demand response market outline, functions of DSMS, real contracted capacity, and payment between consumer and load aggregator and DR operation cases are revealed. The DSMS computes the customer baseline load (CBL), relative root mean squared error (RRMSE), and payments of the customers in real time. The case of 10 MW contracted customers shows 108.03% delivery rate and a benefit of 854,900,394 KRW for two years. The results illustrate that an integrated demand-side management solution contributes by participating in a DR market and gives a benefit and satisfaction to the consumer.

ACS Style

Wonsuk Ko; Hamsakutty Vettikalladi; Seung-Ho Song; Hyeong-Jin Choi. Implementation of a Demand-Side Management Solution for South Korea’s Demand Response Program. Applied Sciences 2020, 10, 1751 .

AMA Style

Wonsuk Ko, Hamsakutty Vettikalladi, Seung-Ho Song, Hyeong-Jin Choi. Implementation of a Demand-Side Management Solution for South Korea’s Demand Response Program. Applied Sciences. 2020; 10 (5):1751.

Chicago/Turabian Style

Wonsuk Ko; Hamsakutty Vettikalladi; Seung-Ho Song; Hyeong-Jin Choi. 2020. "Implementation of a Demand-Side Management Solution for South Korea’s Demand Response Program." Applied Sciences 10, no. 5: 1751.

Article
Published: 26 December 2019 in International Journal of Control, Automation and Systems
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This paper presents a power-smoothing scheme of a variable-speed wind turbine generator (VSWTG) that employs separate control gains for the over-frequency section (OFS) and under-frequency section (UFS). In the proposed scheme, an additional proportional control loop based on the system frequency deviation operating in conjunction with maximum power point tracking operation is used. In the OFS, to improve the energy-storing capability, the scheme suggests the gain of the frequency deviation control loop, which is set to be monotonously decreasing with the rotor speed while being significantly larger than that in the UFS. In the UFS, to improve the energy-releasing capability while preventing over-deceleration, the gain of the frequency deviation control loop is set to be a linear function of the rotor speed. The simulation results under continuously varying wind speeds with different wind patterns and wind speeds clearly demonstrate that the proposed scheme significantly mitigates the output power fluctuations of a VSWTG. The proposed scheme keeps the frequency within a narrow range, thereby reducing the required primary frequency control reserve for regulating the frequency under normal operations.

ACS Style

Dejian Yang; Yong Cheol Kang; Jung-Wook Park; Young Il Lee; Seung-Ho Song. Power Smoothing of a Variable-speed Wind Turbine Generator. International Journal of Control, Automation and Systems 2019, 19, 11 -19.

AMA Style

Dejian Yang, Yong Cheol Kang, Jung-Wook Park, Young Il Lee, Seung-Ho Song. Power Smoothing of a Variable-speed Wind Turbine Generator. International Journal of Control, Automation and Systems. 2019; 19 (1):11-19.

Chicago/Turabian Style

Dejian Yang; Yong Cheol Kang; Jung-Wook Park; Young Il Lee; Seung-Ho Song. 2019. "Power Smoothing of a Variable-speed Wind Turbine Generator." International Journal of Control, Automation and Systems 19, no. 1: 11-19.

Journal article
Published: 27 November 2019 in Energies
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The Jeju Island power system consists of two-unidirectional high voltage direct current transmission systems (HVDC), thermal power plants, and renewable energy sources. The local government’s policy states that a 100 MW offshore wind farm should be constructed in the future. Due to the small size and sensitivity of the Jeju Island power system, power system analysis must be carried out before the installation of the new facility. Therefore, the objective of this study was to analyze the Jeju Island power system with a new wind farm applied to uncontrolled diode rectifier HVDC. Although there are many studies about the grid connection method of offshore wind farms, its small grid connection analysis has been rarely investigated, especially in the diode rectifier HVDC method. Diode rectifier HVDC is a new grid connection method for offshore wind farms, which reduces the costs and increases the reliability of the offshore platform. To verify the accuracy and effectiveness of simulation models, steady and transient state scenarios were conducted using the PSCAD/EMTDC program. First, the model of the Jeju Island power system without a new wind farm was compared with measured power system data. Second, its power system connected with a diode rectifier HVDC was simulated in a steady state. Finally, disconnection and single line ground fault occurred at the offshore wind farm, respectively. From the simulation results, the grid stability of the Jeju Island power system was confirmed considering a new facility.

ACS Style

Sang Heon Chae; Min Hyeok Kang; Seung-Ho Song; Eel-Hwan Kim. Analysis of the Jeju Island Power System with an Offshore Wind Farm Applied to a Diode Rectifier HVDC. Energies 2019, 12, 4515 .

AMA Style

Sang Heon Chae, Min Hyeok Kang, Seung-Ho Song, Eel-Hwan Kim. Analysis of the Jeju Island Power System with an Offshore Wind Farm Applied to a Diode Rectifier HVDC. Energies. 2019; 12 (23):4515.

Chicago/Turabian Style

Sang Heon Chae; Min Hyeok Kang; Seung-Ho Song; Eel-Hwan Kim. 2019. "Analysis of the Jeju Island Power System with an Offshore Wind Farm Applied to a Diode Rectifier HVDC." Energies 12, no. 23: 4515.