vizag steel plant
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INDUSTRIAL TRAINING REPORT-VIZAG Steel plantInternship IN SUB STATION4/4 ,B.E ,EEE-B
P SRAVAN KUMAR 313126514078P VAMSI SAGAR 313126514083P VINOD KUMAR 313126514084T HARISH 313126514102V JANAKI RAM 313126514109
contentsINTRODUCTION TO VIZAG STEEL PLANT.220/132/33/11 KV SUB STATION.POWER TRANSFORMER.POTENTIAL TRANSFORMER.CURRENT TRANSFOMER.ISOLATORCIRCUIT BREAKER.LIGHTNING ARRESTOR.BUSBARS.PROTECTIVE RELAY.WAVE TRAP.GIS (Gas Insulated Substation).CONCLUSION.
INTRODUCTION TO VIZAG STEEL PLANT
One of the largest steel plant in the country with a revenue of Rs. 11.5 Thousand Crore and a profit of 1.5 Thousand CroreOne of the major steel producers inIndia, Vizag Steel Plant has an honor of NAVARATNA company.Most critical component of the industry, over 25000 strong employees, because of whom the company has floated into profits.
220/132/33/11 kv substation
Power transformerFor stepping up or down the system voltage, power transformers are used in the substations. At generating end, the voltage is only stepped up for transmission of power while at all the subsequent substations the voltage is gradually stepped down to reach finally to working voltage level
POTENTIAL TRANSFORMERThe potential transformer is used to convert one electrical form to another form .It is used to measure current &voltage.
CURRENT TRANSFORMERThe current transformer is used to step down .It is used to measure/control/protection.It step downs very high currents to very low currents.
isolatorDisconnector /isolator is used to make sure that an electrical circuit can be completely de-energised for service/maintenanceIsolator is an off-load device
CIRCUIT BREAKERCircuit breakers are used for switching and protection.Brake a circuit automatically under fault condition.A circuit breaker consist of fixed and moving contact called electrode under normal condition.
LIGHTNING ARRESTORLightning arrestor provide protection to all the equipment against the HV an electric discharge between cloud and earth between cloud and charge enters of some loud is known as lightning.It is provide to safety transmission &distribution line.
BUS BARSBus bars are common electrical component through which a large no. of feeders operating at some voltage have to connected.It is used to connect to transmission line which supplies electricity.It is made of high material conductor.
PROTECTIVE RELAYA Protective relay is a device which detect the fault.It is to detect after their go to command circuit breakerIt is provide to safety in electrical equipments.
WAVE TRAPWave Trapsare used at sub-stations using PowerLineCarrier Communication (PLCC). PLCC is used to transmit communication and control information at a high frequency over the power lines. This reduces need for a separate infra for communication between sub-stations.
GIS (Gas insulated sub station)Compact ,multi component assemblySulphur hexafluoride (sf6)gas the primary insulated medium has a superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulationPreferred for voltage ratings of 72.5kv,145kv,300kv,420kv.Every equipment in substation is enclosed with sf6 gas.
Advantages of gis:It occupies very less spaceMore reliable than Air insulated substationsNumber of outages due fault is lessMaintenance free
conclusionNow from this report we conclude that ELECTRICITY plays a important role in daily lifeIn this training we are made aware that how transmission of power in substation for various departments in VIZAG STEEL PLANT