직류 전류 케이블 절연재용 나노 산화아연/XLPE 나노컴포지트의 절연 특성 = Electrical Insulation Characteristics of Nano Zno/XLPE Nanocomposite for DC Power Cable Insulating Material

다국어 초록 (Multilingual Abstract)

The development of materials using the concept of composite materials has long been of much interest. Recently, the new field referred to as nano science and technology has emerged, in line with noticeable research advancements that revealed new physical phenomena in the nano-sized ultra micro region, and improved material properties. In particular, key focuses have been put on the research of various nanocomposite materials by applying nanocomposites to insulation materials. The classical application of HVDC systems is the transmission of bulk power over long distances because the overall cost for the transmission system is less and the losses are lower than AC transmission. A significant advantage of the DC interconnection is that there is no stability limit related the amount of power or the transmission distance. Using polymers as insulation for HVDC cable is a challenge for a number of researchers and manufacturers due to the multiple advantages brought over current oil-filed paper insulation. Cross-linked polyethylene(XLPE) is extensively used for AC high voltage power cable for many years. Because of the risk of space charge under DC electric field in unmodified XLPE, the material is seldom used today for DC applications. In this paper, silane treated nano-sized ZnO by varying the contents and nano particle size of the XLPE specimens were made and describes the findings of a study on eletrical experimental of insulation material. In order to temperature dependence of XLPE nanocomposite sample, DC dielectric breakdown strength were measured at room temperature and maximum allowable temperature (90 ℃). In addition, experimental data were processed with a Weibull probability distribution. In conclusion, changing the content and the particle size of nano-additives for HVDC power cable insulation was applied. In order to apply HVDC power cable insulation, the unipolar DC breakdown strength, space charge formation under DC polarity reversal breakdown strength were investigated. also measured with space charge distribution with pulsed electro-acoustic method.

목차 (Table of Contents)

• Ⅰ. 서 론 1
• 1.1 연구배경 1
• 1.2 연구목적 및 개요 2
• Ⅱ. 나노컴포지트 및 공간전하 측정법 4
• 2.1 나노복합절연재료의 연구 동향 4
• 2.2 직류 고압 전력 케이블 절연재료 7
• 2.2.1 OF 케이블 7
• 2.2.2 MI 케이블 9
• 2.2.3 XLPE 케이블 10
• 2.3 와이블 분포 13
• 2.4 펄스정전응력법에 의한 공간전하 측정 17
• Ⅲ. 시편 제작 및 실험 20
• 3.1 시편 선정 및 제작 20
• 3.1.1 나노 입자 충전재의 선정 20
• 3.1.2 시편 제작 21
• 3.2 실험 방법 25
• 3.2.1 단극성 직류 절연파괴실험 25
• 3.2.2 직류 극성반전 파괴실험 26
• 3.2.3 PEA 법을 이용한 공간전하 측정 27
• Ⅳ. 실험 결과 및 고찰 30
• 4.1 직류 절연파괴강도 30
• 4.2 온도 의존성 33
• 4.3 직류 극성반전 파괴실험 35
• 4.4 공간전하측정 38
• Ⅴ. 결론 41
• 참고문헌 43