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수도권 열제약 발전의 전력계통 안정도에 대한 영향 검토
손다빈,이종훈,전영신,한상욱 대한전기학회 2023 전기학회논문지 P Vol.72 No.3
Approximately 25% of the power generation facilities in the metropolitan area are based on combined heat and power (CHP) generation, constituting a significant portion of the overall power supply. If, in this scenario, the metropolitan CHP facilities are not operational, power generation units from non-metropolitan regions with lower generation costs will take precedence. This situation would impose an additional burden on the northern power flow. Furthermore, due to the current annual limit on northern power flow, coal-fired power generation is periodically halted. Through photovoltaic (PV) analysis, variations in the flexibility margin of the CHP system under thermal constraints were observed. Assuming fluctuations in metropolitan CHP output due to the cessation of coal-fired power generation, the reduction in flexibility margin (MW) was calculated to assess economic effects. Additionally, in order to ascertain the extent of impact on system inertia, simulated scenarios of equipment failures were conducted, calculating inertia to verify its influence on the grid.
복합에너지 허브 내외부 고장에 따른 전력계통 안정도 영향에 관한 연구
이종훈,손다빈,박소진,한상욱 대한전기학회 2023 전기학회논문지 P Vol.72 No.3
Korea Gas Corporation is developing a complex energy platform using natural gas, electricity, hydrogen, and heat. As a part of that, a Turbo Expander Generator(TEG) that generates electricity by turning a turbine with the power to lower the gas pressure at a gas static pressure station has been developed, and it is being installed at the complex energy hub demonstration site. In this paper, we analyze the effect of TEG on the power system when a TEG generator that produces electricity has an electrical contingency inside or outside the complex energy hub. We want to analyze the reactive power and voltage of the system required for this purpose. In addition, when the voltage cannot be maintained in the expected failure, it is intended to suggest a method of using a reactive power compensator to improve it. This is expected to contribute to stably increasing power production by optimally operating the TEG in operating a hybrid energy hub in the future.
이아름,손다빈,문병준,강민지,배수강,이상현,김태욱,이승기 한국진공학회 2024 Applied Science and Convergence Technology Vol.33 No.3
The evolution of optoelectronic devices has been significantly influenced by the development of metal halide perovskites, particularly allinorganic cesium lead halide perovskites (CsPbX3, where X is a halide). These materials have several advantageous properties, including long carrier diffusion lengths, high and broad absorption spectra, tunable bandgaps, high carrier mobility, and low-temperature fabrication processes. These qualities make them highly suitable for applications in light-emitting diodes and solar cells. However, the practical application of perovskite quantum dots (QDs) synthesized through the hot-injection method, stabilized by hydrophobic alkyl ligands, is hindered by decreased charge transport characteristics and quantum efficiency due to the insulative nature of the ligands. Innovations to overcome these limitations have included using shorter halide ion pair ligands, such as didodecyl dimethylammonium bromide, and optimizing purification processes to enhance charge injection and maintain stability. We introduced a novel approach for surface ligand engineering through a methanol-based washing process applied during spin-coating, effectively removing excess ligands and residual solvents, and potentially offering a path toward the fabrication of high-performance, low-voltage memory devices using perovskite QDs. This method not only simplifies the purification process but also preserves the photoluminescence, colloidal stability, and structural integrity essential for scalable optoelectronic applications.
동적 부하모델 전력계통 주파수 및 관성 영향에 관한 연구
이종훈,손다빈,정영민,김한영,한상욱,이동호 대한전기학회 2023 전기학회논문지 P Vol.72 No.4
This paper analyzes the inertial impact on dynamic simulations of power systems with changes in load models. The growing significance of inertial assessments in power systems is attributed to the increasing penetration of renewable energy. Inertial considerations encompass not only generator inertia but also load inertia. Typically, the load model employed in power system analysis is the ZIP (ZIPload) model. We hypothesized that introducing parameter variations in the load model would affect system inertia in the course of conducting power system analyses. Consequently, depending on the inertia estimation method, the inertia of the entire system was found to vary from a minimum of 1.6% to a maximum of 18% due to load model parameter changes. This underscores the crucial role of load modeling in estimating the inertia of power systems.