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PSS/e GFMI UDM 을 이용한 ESS 제어모드 제주 계통 기여도 분석
박준수,문승필,윤민한 대한전기학회 2024 전기학회논문지 Vol.73 No.11
As the penetration ratio of renewable energy known as inverter based resources(IBR) to power system increases worldwide, large amount of IBR causes various problems. Most of the IBR currently used in the Korean power system are Grid Following Inverter(GFLI) and have an output issue due to unstable phase angle when the grid disturbance occurs. In addition, there is a limit of instantaneous inertial output due to basic controller structure and delay of Phase Locked Loop(PLL). Under these circumstances, Grid Forming Inverter(GFMI), which self-controls voltage and phase angle like a synchronous machine, is attracting attention as a alternatives that can contribute to increasing system stability and inertial energy. In this paper, GFMI with various power control was constructed in PSS/e User Defined Model(UDM), and the output characteristics of the GFMI in the test system were verified through System Frequency Response(SFR) and Per Unit(PU) based controller configuration. Then, the GFMI model was integrated into the Jeju system in Korea and the output characteristics in case of disturbances were compared in PSS/e simulation. When compared to existing GFLI, it was confirmed that the GFMI contributed to more initial inertial energy and injected stable reactive power for voltage control. Therefore, the need to increase the robustness and stability of the Jeju system through the GFMI ESS control mode was verified.
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사우디 라빅발전소 터빈 블레이드 파손 분석기술 현장 적용
박준수,Park, Jun Su 한국전력공사 2021 KEPCO Journal on electric power and energy Vol.7 No.1
한전에서 운영중인 사우디라빅발전소에서 저압터빈 블레이드가 파손되었다. 블레이드의 경우 터빈의 핵심부품으로서 증기를 활용하여 발전기를 회전시켜 전기를 생산하는데 필수 부품이다. 반복적인 사고발생을 예방하기 위해 조직분석, 운전신호 분석등을 활용하여 원인을 규명하였고, 대책을 제시하였다.
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박준수,편복양,김영통 대한 소아알레르기 및 호흡기학회 1999 Allergy Asthma & Respiratory Disease Vol.9 No.2
Idiopathic pulmonary hemosiderosis(IPH) is a rare disease of unknown etiology; is characterized by bleeding into the alveoli and progressive pulmonary fibrosis. The clinical and paraclinical findings consist of recurrent hemoptysis, pulmonary infiltrates, and iron deficiency anemia. Examinations of sputum disclose large numbers of hemosiderin-laden alveolar macrophage. Pulmonary interstitial fibrosis may develop. We experienced a case of recurrent IPH in an eight and half year-old girl who had been initially admitted at the age of 12 months old for the same complaints: cough, fever, and recurrent episodes of hemoptysis and iron deficiency anemia. Hemosiderin laden macrophages were demonstrated in smears of material obtained from gastric juices. There were no specific causes for the pulmonary hemorrhage. We reported a case of IPH with sequential findings on plain chest radiograph and high resolution computed tomography.
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