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임현성(Hyun-Sung Lim),한운기(Un-Ki Han),정진수(Jin-Soo Jung),박찬엄(Chan-Eom Park),송영상(Young-Sang Song),최종수(Jong-Soo Choi) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.10
Recently, the power supply situation has deteriorated and the plan has issued to utilize of emergency generators for securing standby power. If a part of Emergency Generators was utilized by peak shaving, it can be avoiding over-investment in supply power facility. In this paper we investigate management of Emergency Generator and understand the current situation. So, we verify demand response resource possibility of Emergency Generator.
안봉만 ( Bong Man Ahn ),한병성 ( Byoung Sung Han ),한운기 ( Un Ki Han ),이영관 ( Young Kwan Lee ),안현진 ( Hyun Jin An ) 한국전기전자재료학회 2022 전기전자재료학회논문지 Vol.35 No.6
This paper is a study on frequency analysis and electronic noise reduction of energy storage system (ESS). We acquired 4 necessary data for about 2 minutes and 4 seconds using a sampling frequency of 10,000 Hz in ESS. Fast Fourier transform (FFT) was used for electronic noise analysis from the acquired data. As a result, it was confirmed that DC component, fundamental wave, second and higher harmonic component exist. For the attenuation of harmonics, low-pass filter (LPF) was applied. We confirmed that an attenuation of approximately 59.3% appears from the second harmonic. The presence of many harmonic components in the data of the ESS was expected to occur due to the insufficiency of optimization among the modules inside the ESS. Therefore, we propose that a national certification system for ESS should be introduced to settle down the issue properly.
태양광 발전설비의 침수 시 설비영향 및 전기적 안전성 평가
박찬엄(Chan-Eom Park),정진수(Jin-Soo Jung),한운기(Un-Ki Han),임현성(Hyun-Sung Lim),송영상(Young-Sang Song) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.12
The photovoltaic power system is performing power generation by being installed in outdoors. Therefore it has the characteristics affected by environmental factors. In particular, if the solar power generation facility connected to the grid, the power can be generated continuously in a state of being secured operating voltage of the inverter and solar irradiation. In that case, if an abnormal situation such as flooding or heavy rains has occur, the possibility of electric shock or damage of facilities due to current leakage or a floating matters is present. In this paper, we performed electrical safety assessment about the connection part, junction box and cable of the solar module when the solar power system was flooded. we also assessed whether or not the leakage current is occurred in case of the cable was damaged. As a result, in case of the leakage current is large, we can be known that it is the risk of electric shock as well as cause of inverter damage.