Development of 500kV Liquid Cooled Gas Insulated Transformer

Detection in Spacer of Gas-Insulated Switchgears

With the increasing demand for precise condition monitoring and diagnosis of 11 gas-insulated switchgears (GIS), it has become a challenge to improve the detection sensitivity of 12 partial discharge (PD) induced in the GIS spacer. This paper deals with the elimination of the 13 capacitive component from the phase resolved partial discharge (PRPD) signal generated in GIS 14 spacer based on the ...

High Temperature Gas Cooled Reactors

New 550-kV Gas-insulated Switchgear

OVERVIEW: Hitachi has developed smaller and more reliable gas-insulated switchgear (GIS) in response to demands for lower costs and stable power supplies. Reliability of this GIS was improved and the enclosure diameter was reduced in order to minimize the installation space by using new analysis techniques and rationalization in insulation design and in temperature rise criteria. Furthermore, t...

Combination of a self-cooled liquid metal breeder blanket with a gas turbine power conversion system

Self-cooled liquid metal breeder blankets have a high potential to meet the overall goal of fusion research to develop an economically and environmentally attractive energy source. They offer the possibility to design mechanically simple blanket segments, employ a high-temperature, low-pressure coolant, allow for a high power density, and as consequences of these, achieve high efficiency and av...

Screening Method for Rapid Determination of Polychlorinated Biphenyls in Transformer Oil by Liquid-Liquid Extraction and Gas Chromatography-Mass Spectrometry

Um método simples e rápido foi desenvolvido para análise de bifenis policlorados (PBC) em transformadores a óleo. O método baseia-se na extração líquido-líquido em metanol e subseqüente determinação direta por cromatografia gasosa acoplada a espectrômetro de massa. A polaridade do metanol permite extrair PCBs, junto com uma quantidade mínima de componentes apolares do óleo, evitando assim etapa...