A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels.
Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control ....etc

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33/11 KV Sub Station

Main Equipments in 33 KV Sub-Station

1) Power transformer
2) Circuit breaker
3) Isolator
4) Earthing switch
5) lightning arrestor
6) Busbar
7) Current transformer
8) Potential transformer
9) Protective relay
10) DC battery set
11)Capacitor bank
12)Fire fighting system

Power transformer

Transformer is used to step down the voltage from 33 kv voltage to 11kv voltage .
Generally 3.15 MVA, 5 MVA, 10 MVA 33/11kv, / Y transformer are used in 33/11kv s/s.

Maintenance of Transformers

Check Oil level in main tank & OLTC ta ....etc

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SUB-STATION EQUIPMENTS & ITS FUNCTIONS
Lightening Arrester
Lightening arrestors are the instrument that are used in the incoming feeders so that to prevent the high voltage entering the main station. This high voltage is very dangerous to the instruments used in the substation. Even the instruments are very costly, so to prevent any damage lightening arrestors are used. The lightening arrestors do not let the lightening to fall on the station. If some lightening occurs the arrestors pull the lightening and ground it to the earth. In any subst ....etc

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Gas Insulated Substation
Gas Insulated Substations(GIS) is a compact, multicomponent assembly enclosed in a ground metallic housing which the primary insulating medium is compressed sulphur hexaflouride(SF6) gas. It generally consists components Of
a) Bus bars
b) Circuit Breakers
c) Disconnecting switches
d) Earthing switches
e) Current transformers
f) Voltage transformers
g) Cable and boxes
h) Gas supply and gas monitoring equipment
i) Densimeters and
j) Local control
Why we need GIS1) Gas insulate ....etc

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110KV SUB-STATION PARUTHIPARA
IV REPORT



INTRODUCTION
The hydel power development in Kerala began with the commissioning of Pallivasal hydro electric project in 1940. Next few decades saw the progressive developments of various schemes. The Paruthipara substation is the oldest substation in Trivandrum. There are 4 main feeders into this substation .it consists of a upper yard and a lower yard. The upper yard has the 2 feeders from Pothencode substation. These are ....etc

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http://seminarsprojects.net/Thread-seasonal-influence-on-safety-of-substation-grounding--227

http://seminarsprojects.net/Thread-substation-automation ....etc

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As a student of MBA Power Management from the National Power Training Institute,
Faridabad, I got a rare opportunity to do my summer internship in Powergrid
Corporation of India Limited, India s Central Transmission Utility.
Though my reporting office was the Regional Headquarters situated in New Delhi, the
authorities were generous enough to allocate me a working project that dealt with the
study of existing infrastructure at the 400/220 KV substation situated in Gurgaon which
supplies power to Haryana. The initial part of the project ....etc

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mobile substation seminar report

Mobile substations are a perfect solution, whenever utilities and industries need to provide interim grid connections and temporary power supplies.
Applications range from power supply during emergency or planned outages, to events, moving loads, and the integration of distributed or renewable generation.
Mounted on skids, trailers or in containers for rail, road or air transportation, these substations come in the form of ready-to-connect, complete assemblies and are designed for grid code compliance and easy ....etc

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