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서왕벽,Suh, Wang Byuck 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.10
In this study, an epoxy insulation barrier for high voltage GIS was developed using epoxy and a filler with a Young's modulus of 11 GPa. The material was investigated using a simulation of the principal stress, displacement, and safety factors while optimizing the profile shape. The simulation showed that thelarger Young's modulus of the $Al_2O_3$ filler compared to the $SiO_2$ in the epoxy insulation can contribute to an increase in resistance to mechanical fracturing for theoptimized profile barrier in high voltage GIS. In addition, the safety factor was improved by 10%. It can be concluded that the mechanical fracturing properties of the insulation barrier can be enhanced by increasing the content of the elastic filler, $Al_2O_3$, for high voltage GIS applications.
와전류 손실을 적용한 금형으로 제조된 초고압 변압기의 프레스보드의 절연 특성 연구
서왕벽,Suh, Wang-Byuck 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.8
Some insulating materials are tested and analyzed with variables to obtain the reliable pressboard which is located to core and coil of high voltage transformer. The high voltage transformer is used in electrical power system and operating reliability. Optimization possibility of pressboard shape including electrical insulation performance could be achieved by analysis simulation. Using insulating pressboard, which is made by mold applied eddy current loss, it could be measured the influences of moisture content for electrical properties. As a result, it is to contribute to improve the performance and ensure the reliability of the pressboard by investigating electrical strength according to the variation oil temperature. In addition pressboard thickness is important design factor to ensure electrical strength in high voltage transformer.
154 kV급 변압기 절연물 앵글링과 캡의 최적성형 기술 개발
서왕벽,김종원,유정수,배동호,Suh, Wang-Byuck,Kim, Jong-Won,Ryu, Jung-Soo,Bae, Dong-Ho 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.11
The Angle Ring and Cap which is called pressboard are settled at the primary and secondary coil winding of 154 kV transformer that can reduce effectively distance of insulation. As it has not manufactured pressboard of Angle Ring and Cap for high voltage grade, insulation components industry especially high voltage transformer has not participate in a competition with worldwide yet. That's why is difficult to make an specialized shape of insulation components of high voltage grade. Therefore it has finally completed to make an deformation manufacturing utility using an bellowed special analysis tools. This study that uses various analysis program determining optimum shape about insulation of Angle Ring and Cap which is related life of high voltage transformer. In addition to develop forming equipment with an specialized five steps pressing. That is also based on the mechanical strength evaluation and test, it is investigated optimized processing components.
SiO<sub>2</sub>와 Al<sub>2</sub>O<sub>3</sub>를 충진재료로 사용하는 초고압 GIS용 에폭시 절연물 베리어의 전기적 및 기계적 특성에 관한 연구
서왕벽,배동호,Suh, Wang-Byuck,Bae, Dong-Ho 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.6
Some insulating materials are organized and analyzed with variables to obtain the optimized profile of encapsulated three phase of epoxy barrier which is applied to gas compartment and supporting conductors for high voltage GIS (gas insulated switchgear). The high voltage GIS is used in electrical power system and operating reliability. In this paper, optimization possibility of barrier shape including both electrical insulation performance and mechanical strength, premised on that condition minimizing volume and light weight should be kept for high voltage GIS, could be achieved by analysis simulation. As a result, filling material which is lower permittivity such as $SiO_2$ instead of $Al_2O_3$ properly to the epoxy material, can be improved to increase the electrical insulation performance and mechanical strength for an optimized profile barrier of a high voltage GIS.
SF. 가스절연 Recloser용 PMA에 대한 특성해석에 관한 연구
김한균(Kim Han Kyun),장정원(Jang Jeong Won),이창환(Lee Chang Hwan),서왕벽(Suh Wang Byuck),한성진(Hahn Sung Chin) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
SF. 가스절연 Recloser는 선로에 일시적인 과전류가 발생하면 개방 후 자동 재투입 하면서 선로의 정상적인 운전상태를 회복하고, 영구 고장 시에는 정해진 Sequence에 따라 개방, 투입을 반복한 후 개방완료 상태에 이르게 하는 보호기기이며, 조작부는 주로 Solenoid Actuator 방식을 채택해왔었다. 그러나 Solenoid Actuator 방식은 구조가 복잡하고 부품수가 많은 단점이 있어 최근에는 사용 부품수를 획기적으로 감소 시키고 조작 신뢰성을 증대시킨 Magnetic Actuator 방식을 채택하여 사용하는 경향을 보이고 있다. 이 Magnetic Actuator 방식은 구조가 간단하고 부품수가 적어 높은 신뢰성을 확보할 수 있고 유지 보수가 거의 필요하지 않는 장점을 가지고 있다. 이에 본 논문에서는 SF. 가스절연 Recloser의 조작부에 Magnetic Actuator 방식(이하 PMA (Permanent Magnetic Actuator)을 채용 하였으며, 이를 적용하기위한 입력전원 및 투입, 개방 코일을 패러미터로 하여 PMA의 동적특성을 실험하였으며, 이 실험 자료에 근거하여 27[㎸] SF. 가스절연 Recloser의 PMA 조작부를 설계 및 제작하였다.