Answer / deepuraj

Substation are classified into
1.According to service requirement are
a.Transformer substation
1.Step up S.S
2.Primary grid S.S
3.Secondary S.S
4.Distribution S.S
b.Switching S.S
c.Power factor correction S.S
d.Frequency Changing S.S
e.Convrerting S.S
f.Industrial S.S
2.According to the constructional features
a.Indoor S.S
b.Outdoor S.S
c.Undergrond S.S
d.Pole mounted S.S

Answer / tarun aggarwal ymca

The substations can be classified in several ways including the
following:
i) Classification based on voltage levels e.g.:
AC Substation: EHV, HV, MV, LV; HVDC substation
ii) Classification-outdoor or indoor.
Outdoor substation is under open sky. Indoor substation is
inside a building.
iii) Classification based on configuration, e.g.:
a) Conventional air insulated outdoor substation or
b) SF6 Gas Insulated Substation (GIS)
c) Composite substations having combination of the above two.
iv) Classification based on application.
a) Distribution substation
b) Switchyard in Generating Station
c) Switching substation (without power transformers)
d) Sending-end substation
e) Receiving substation
f) Factory substation
g) Compensating substation e.g. having static var compensation etc.
h) Load substation, e.g. arc-furnace substation.

Answer / gbs

all answers comes under 2 main categories
1. AIS- Air insulated substation
2.GIS- Gas insulated substation
gis are normally underground or indoor type.
and ais ar open type

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