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해상 풍력발전단지에서 뇌격 시 서지어레스터 열화로 인한 연계 고장 분석
김진혁(Jin-Hyuk Kim),김규호(Kyu-Ho Kim),이재균(Jea-Kyun Lee),우정욱(Jung-Wook Woo) 대한전기학회 2018 전기학회논문지 Vol.67 No.10
One of the ways to improve the stability of power facilities used in power systems is to use power surge arresters and to protect against transient overvoltages and surges in normal operation. Also it is important to reduce the impact of lightning strikes because lightning can create overvoltage in the grid of the wind turbine and affect power quality. So This paper analyzes the effects of overvoltage and adjacent turbines due to single strike and multi strike to ground impedance changes when the surge arrester is deteriorated in a wind power farm.
낙뢰 보호 구역과 IEC-60364 접지방식을 고려한 태양광 발전설비의 낙뢰 서지 영향
조재영(Jae-Young Cho),김규호(Kyu-Ho Kim),이재균(Jea-Kyun Lee),우정욱(Jung-Wook Woo) 대한전기학회 2019 전기학회논문지 Vol.68 No.11
This paper analyzes the change of lightning overvoltage due to the grounding system and LPZ consideration. In IEC-60364, three different grounding methods are introduced to protect the facilities from transient overvoltage in different situation. IEC-61312 defines the LPZ(lightning protection zone) so that different methods of lightning protection can be taken at different protection level. by adjusting surge arresters as specified in IEC-62305. This paper simulates how much lightning overvoltage is occurred in photovoltaics and how its condition varies under the change of grounding system method and the type of surge protection device used.