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Thermal Characteristics of ACSR-OC Wires due to Poor Contact
Bimaridi Afif(비마리디 아피프),Seunghee O(오승희),Dewimaruto Ratri(데위마루토 라트리),Younghun Park(박영훈),Younghwa Kim(김영화),Dongmyung Kim(김동명),Hyoungku Kang(강형구) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
This study deals with the effects of a poor contact on the thermal variations of ACSR-OC wires. Due to resistance changes as a result of poor contact, the temperature of ACSR-OC wires may rise which could cause an fire accidents. The temperature variation of ACSR-OC wires according to contact resistance is evaluated by using an IoT sensor developed by ASSEMBBLE Co., Ltd. involving an infrared sensor.
Temperature variations of HIV cables due to poor contact
Bimaridi Afif(비마리디 아피츠),Seunghee O(오승희),Dewimaruto Ratri(데위마루토 라트리),Younghun Park(박영훈),Younghwa Kim(김영화),Dong-myung Kim(김동명),Hyoungku Kang(강형구) 한국조명·전기설비학회 2021 한국조명·전기설비학회 학술대회논문집 Vol.2021 No.11
The research deals with experimental results on the thermal variations of HIV cables as results of a poor contact. Temperature of HIV cables may increase due to resistance changes according to poor contact. In this study, the temperature variation of HIV cables according to contact resistance is confirmed by using an infrared sensor.
Stabilizer에 따른 2세대 고온 초전도 선재의 전기적 열화특성 비교
Bimaridi Afif,오승희,박영훈,박진형,조우현,신우철,Ragil Handito,박성건,강형구 한국조명.전기설비학회 2022 조명·전기설비학회논문지 Vol.36 No.5
2G High temperature superconducting(HTS) conductors are usually considered as appropriate superconductors for a superconducting coil to develop an applied superconducting apparatus such as a superconducting fault current limiter(SFCL), a superconducting cable, and a superconducting accelerator with high voltage or high ramping-up rate condition. The electrical degradation characteristics of HTS conductors due to electrical breakdown should be taken into consideration because high electric field intensity induced by high operating voltage or rapid ramping-up rate can affect the dielectric stability. In this study, the electrical degradation characteristics of 2G HTS conductors with different metal stabilizers made by SuNAM Co., Ltd. are analyzed and compared through dielectric experiments. As results, the most appropriate type of a 2G HTS conductor is recommended to manufacture superconducting apparatuses with a high voltage or rapid ramping-up rate condition.
절연파괴에 따른 2세대 고온 초전도선재의 열화특성에 관한 연구
Bimaridi Afif,오승희,박영훈,박진형,조우현,신우철,Ragil Handito,박성건,강형구 한국조명.전기설비학회 2022 조명·전기설비학회논문지 Vol.36 No.3
2G high temperature superconducting (HTS) wires have been widely adopted to develop high voltage superconducting apparatuses such as a superconducting fault current limiter (SFCL), a superconducting cable, a superconducting transformer, and so on. A study on the dielectric degradation characteristics of 2G HTS wires due to electrical breakdown should be performed to enhance the stability and to accelerate the commercialization of high voltage superconducting apparatuses. In this study, the degradation characteristics of 2G HTS wires, SCN-04 made by SuNAM Co., Ltd. are analyzed by dielectric experiments with AC and lightning impulse voltage in saturated liquid nitrogen (LN2) of 77K. The 2G HTS wire used in this study has silver stabilizing layers on both sides of GdBCO layer. Also, the substrate is made with stainless steel and whole 2G HTS wire is surrounded by copper. It is verified that the degree of degradation of the 2G HTS wire is affected by the magnitude of the applied voltage and the type of voltage. Also, cracked GdBCO layer due to electrical breakdown is shown by scanning electron microscope (SEM) image. The degradation characteristics such as critical current and index n of 2G HTS wire due to electrical breakdown can be explained by mechanical cracked structure of a GdBCO layer.
GIS의 수명특성 분석을 통한 고장대수 예측에 관한 연구
오승희,Bimaridi Afif,박진형,조우현,신우철,Ragil Handito,박성건,이종득,민길식,강형구 한국조명.전기설비학회 2022 조명·전기설비학회논문지 Vol.36 No.7
In the past, in accordance with the rapid development of industrial society, power facilities were replaced in order to expand the power grid and upgrade the performance. However, as the modernization of the industrial society is saturated, the replacement speed of facilities is slowing down, and the aging equipment is increasing. Therefore, interest in how to manage aging facilities is increasing, and research on the asset management of power facilities is required to establish a plan to efficiently operate facilities that are already in operation. It is necessary to diagnose the status of the facilities and analyze how the condition of the facilities will change in the future through an analysis of the remaining life. In order to establish the process, research on the statistical life of assets should be preceded. However, in the case of South Korea, power facilities are replaced before failure occurs in order to improve the reliability of power grid. Therefore, there is insufficient data to estimate the statistical life power assets. In this paper, a study on a system that analyzes the statistical lifetime using the data of gas insulated switchgear (GIS) published abroad and predicts the number of failures over time using the hazard rate.