POST INSULATOR DESIGN OPTIMIZATION IN MEDIUM VOLTAGE SWITCHGEAR

Dielectric Properties of Gases Suitable for Secondary Medium Voltage Switchgear

SF6 is the dominating technology for gas insulated switchgear due to its excellent dielectric, thermal and arc quenching properties. Unfortunately, SF6 suffers from a very high global warming potential (GWP). Even though medium voltage switchgear is sealed for life with less than 0.1% emissions per year, the EU has specifically targeted SF6 for replacement in medium voltage switchgear for secon...

Partial Discharge Pattern Recognition of Medium-Voltage Switchgear Based on Association Rules Mining

In the paper, a new partial discharge pattern recognition approach based on association rules mining is developed. Some statistical parameters are extracted from the sampled transient earth voltage data and classic Apriori algorithm is employed to mine the association rules between those parameters and the corresponding fault types. Moreover, using other experimental data obtained in the labora...

Development of Medium-voltage Switchgear for Reducing Environmental Impact and Space-saving

Kenji Tsuchiya Koichi Nagano Ayumu Morita Tetsuya Hirao OVERVIEW: To make medium-voltage switchgear (52 kV or less) smaller and more robust, there has been a shift away from AISs and toward GISs that use SF6 gas . However, the high global warming coefficient of SF6 gas means it was designated as a greenhouse gas by the Kyoto Protocol (Kyoto Protocol to the United Nations Framework Convention on...

Ultra-high-voltage switchgear to power China

Power Optimization Issues in Dual Voltage Design

In this paper, we look at power optimization issues under dual supply voltage environment, with the goal of optimizing power consumption due to interconnection and gate capaci-tances. Logic level synthesis is used as a good starting point for power reduction, while subsequent placement stage mod-iies or veriies logic level design by providing more accurate estimate of power dissipation. We try ...