奖惩登记表 Title.ppt

Gas Insulated Switchgear
Working Group Options
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Current position
For the purposes of the working group the term GIS refers to all gas-insulated,
metal-clad electrical equipment at electricity substations where both the
substation busbars and the interfacing switchgear between those busbars and
any connecting circuits are of metal-clad, gas-insulated construction
Generally GIS zones can be classified into two broad types
GIS substations where the bus selector disconnectors are in the same gas zone as the busbars
GIS substations where the bus selector disconnectors are not in the same gas zone as the busbars (. where there are gas zone separators between the bus selector disconnectors and the busbars).
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GIS – as currently defined
CUSC defines the electrical boundary and the ownership boundary for GIS as the gas zone separators on the busbar side of the busbar selection devices
Historically there was a gas zone separator between the busbar and the bus-selector disconnectors and the CUSC definition produced a GIS ownership parable to that for AIS installations
Most newer GIS installations do not incorporate a gas zone separator between the busbar and the bus-selector disconnectors and the CUSC boundary definition results in a default ownership and electrical boundary which includes sections of busbars as Users’ assets
A
B
AIS ownership boundary
GIS ownership boundary (CUSC)
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Option 1 – RWE’s Proposal
Ownership and electrical is moved to include all connected GIS assets at a GIS Substation . up to the cable sealing/GIS to AIS termination
A
B
RWE proposed ownership boundary
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Option 1 – RWE model
Advantages
Addresses construction issues and
interaction of licenced and
unlicenced works
Removes inconsistency for future
GI