研究者詳細 - 小島　寛樹

講演・口頭発表等 - 小島　寛樹

分割表示 795 件中 601 - 620 件目／全件表示 >>

Optimization of Asset Maintenance Strategies and Power Flow Operation Based on Condition Diagnoses 国際会議

F. Endo, R. Shiomi, Y. Suzuki, H. Kojima, N. Hayakawa, H. Okubo

16th International Symposium on High Voltage Engineering

Automatic Calculation of Optimized Electrode Configuration in Vacuum Interrupter 国際会議

K. Suzuki, K. Kato, H. Kojima, H. Okubo

16th International Symposium on High Voltage Engineering

HVDC機器の運転条件下における電界分布に対する絶縁物配置効果

飯塚伸介，小島寛樹，遠藤奎将，大久保仁

平成21年電気学会電力・エネルギー部門大会

電力システムへの故障インパクトを考慮した開閉装置の保守最適化

鈴木陽太郎，塩見僚，小島寛樹，早川直樹，遠藤奎将，大久保仁

平成21年電気学会電力・エネルギー部門大会

SF₆ガス中部分放電特性に及ぼすフロート金属異物の影響とその識別

浅井基希，小島寛樹，早川直樹，遠藤奎将，吉田昌展，内田克己，大久保仁

平成21年電気学会電力・エネルギー部門大会

Optimized Asset Management of High Voltage Substations and Power Network Operation Based on Equipment Performance 国際会議

F. Endo, R. Shiomi, Y. Suzuki, H. Kojima, N. Hayakawa, H. Okubo

Cigré 6th Southern Africa Regional Conference and Joint Colloquium of CIGRE Study Committees A2(Transformers)-A3(High Voltage Equipment)-B3(Substations)

Influence of Accumulated Surface Charges on Partial Discharge Activity at Micro Gap Delamination in Epoxy GIS Spacer 国際会議

D. A. Mansour, H. Kojima, N. Hayakawa, F. Endo, H. Okubo

9th International Conference on Properties and Applications of Dielectric Materials 2009年7月21日 Harbin University of Science and Technology

開催年月日： 2009年7月

記述言語：英語会議種別：口頭発表（一般）

開催地：Harbin 国名：中華人民共和国

In epoxy spacers in Gas Insulated Switchgear (GIS) under operating thermal or mechanical stresses, delamination would be initiated at electrode/epoxy interface leading to partial discharge (PD) activity. In this paper, PD activity for delamination at electrode/epoxy interface in SF6 gas is measured and analyzed to clarify the effect of accumulated charges on the epoxy surface. The delamination gap length considered in this paper is 50 μm. The moment of delamination initiation in GIS is successfully simulated by applying sudden voltage to the electrode setup. The main results show that the charge accumulation has great effect on the PD generation rate. This effect is different between negative and positive PD as a result of the difference in initial electron generation mechanism. The measurement of surface potential and the change in PD inception voltage after PD activity enable to estimate the accumulated charge polarity. Consequently, the role of charge accumulation in PD activity is proposed based on the change in local electric field inside the delamination gap. ©2009 IEEE.

DOI： 10.1109/ICPADM.2009.5252341

Scopus

CiNii Research

HTS Fault Current Limiting Transformer (SFCLT) 国際共著国際会議

N. Hayakawa, H. Kojima, F. Endo, H. Okubo, M. Noe

CIGRE Workshop on Test Techniques and Procedures for HTS Power Applications