132 KV GSS CHAMBAL JAIPUR

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Transcript of 132 KV GSS CHAMBAL JAIPUR

By:-Vaibhav BhargavaRoll No- 59(12EJCEE060)7Th Semester Electrical

132 KV G.S.S. Chambal Power House, JaipurPresentation on summer training at:-

Introduction About R.R.V.P.N.L

It wasestablishedon19July,2000byGovt.of Rajasthan under the provisions of the Rajasthan Power Sector Reforms Act, 1999 as the successorcompanyofRSEB.

Itsaimistoprovidereliableelectrictransmissionserviceto customers.

It is responsible for installing of EHV Lines and GSS of 765 KV, 400 KV, 220 KV, 132 KV rating including their maintenance.

2

RVPN System at Glance

ContentsIntroduction about GSS ChambalSite Selection CriteriaEquipments Used in YardSingle Line DiagramControl RoomTransformerLightning Arrester(LA)Capacitive Voltage Transformer(CVT)IsolatorCircuit Breaker(CB)Current Transformer(CT)RelaysEarthingBattery RoomPower Line Carrier Communication(PLCC)Conclusion

Introduction About 132KV GSS ChambalIt is located at Hawa Sadak, Jaipur Rajasthan

It was commissioned in the year 1962 as a part of Chambal Project.

In this hydro generation was proposed by RPS,JS,KB.

Initial capacity was 50 MVA.

Incoming Feeders of 132 KV

Heerapura

Mansarovar-Sanganer(MNSR)

Nallah Power House

There are 11 33 KV and 18 11 KV outgoing feeders . Some of them are:-

DurgapuraVidhan Sabha22 GodamLal KothiMREC

Site Selection Criteria for GSSLand:choose areas that minimize the need for earth movement and soil disposal.

Water:avoid interference with the natural drainage network.

Vegetation:choose low productivity farming areas or uncultivated land.

Topography:flat but not prone to flood or water stagnation.

Soil:suitable for construction of roads and foundations; low soil resistivity is desirable.

Equipments in the YardTRANSFORMERSCAPACITIVE VOLTAGE TRANSFORMERWAVE TRAPCOUPLING CAPACITORCAPACITOR BANKBUS BARINSULATORSISOLATORLIGHTNING ARRESTERCIRCUIT BREAKERCURRENT TRANSFORMERBUS COUPLER

SYMBOL USED IN SLD

Single Line DiagramA Single Line Diagram (SLD) of an Electrical System is the Line Diagram of the concerned Electrical System which includes all the required Electrical Equipment connection sequence wise from the point of entrance of Power up to the end of the scope of the mentioned Work.

SINGLE LINE DIAGRAM

Noticeable aspects of S.L.D.Naming of componentsSequence of equipments for an incoming or an outgoing feeder11KV & 33KV FeedersSymbol Chart

Sequence Of Equipments for an incoming or an outgoing feeder

L. A.P.T. / C.V.TC. T.

C. B.

LIGHTNING ARRESTERPOTENTIAL X-MER/CVTISOLATORCURRENT TRANSFORMERCIRCUIT BREAKERISOLATORBUS BAR

CONTROL ROOM The diagram made on the control panel is known as mimic diagram. Colors of signals are synchronized as follows: Red For circuit breaker or isolator switch is in closed position. Green - For circuit breaker is in open condition. Amber Indicates spring is charged.

TRANSFORMER

Main parts of TransformerMAIN TANKCONSERVATOR TANKBUSHINGSBREATHERRADIATORSDRAFT FANSBUCHHOLZ RELAYTEMPERATURE INDICATORSTAP CHANGER

S.NO. MAKEVOLTAGECAPACITYCURRENT(ON HV SIDE) 1T&R132/33 KV40/50 MVA179.95/218.5 2T&R 132/33KV40/50 MVA179.95/218.5 3CROMPTON132/11 KV16/20 MVA69/87.5 4ALSTOM132/11KV10/12.5 MVA69/87.5 5T&R132/11 KV16/20 MVA69/87.5 6T&R132/11 KV16/20 MVA69/87.5

Specifications

Types of Protection Relays of Transformer

Primary protectionDifferential ProtectionNeutral displacement relaySecondary / backup protectionOver current relayEarth fault relayAuxiliary protectionBuchholz relayOil surge relayWinding temperature relayOil temperature relayPressure Release Device(PRD)

TRANSFORMER OIL FILTRATION UNIT

S. No.Voltage(KV)Name of Conductor1400vACSR Weasel211 KVWeasel333 KVDog4132 KVPanther5220 KVZebra6400 KVMoose7765 KVTarantula

Types of ConductorThe size and coupling type of conductor is decided by its voltage level.

Lightning Arrester

It is a protective device that reduces excessive voltage resulting from lightning to a safe level by grounding the discharge. It shows dual characteristics.During Lightning it works as super conductor whereas normally it works as insulator.

CVT

CVT in a substation is used for measurement, protection and as coupling device in PLCC.

In its basic form the device consists of three parts: two capacitors across which the transmission line signal is split, an inductive element to tune the device to line frequency, and a transformer to isolate and further step down the voltage for instrumentation or protective relay.

Isolator

An Isolator is a manually operated mechanical switch which separates a part of the electrical power system normally at off load condition.

While opening the circuit, circuit breaker opens first and then isolator & while closing the circuit the isolator closed first and then circuit Breaker.

CIRCUIT BREAKER

Circuit Breaker ComparisonSF6 CIRCUIT BREAKER

Gas is used as an arc quenching medium.It is an electronegative gas.It has a tendency to absorb free electrons.

VACUUM CIRCUIT BREAKER

Vacuum is used as an arc quenching medium. It has very fast rate of recovery of dielectric strength.The arc is extinguished quickly.

Current Transformer

Current transformer are commonly used for protection and measuring of high values of currents. C.T. is used for reducing A.C. from higher to low value for measurement/protection/control. The primary winding of a current transformer is connected in series with the circuit whose current to be sensed and across the secondary of current transformer, the operating coil of the relay is connected.

RelaysIt is an electrically operated switch.

Major types of Relay are Electromagnetic & Static type.

It controls High Voltage Electrical Circuits with low voltage signal

In GSS control panels consisting of Relay operates at 110 V DC.

Important Relays Used at GSSOver current Relay

Earth Fault Relay

Differential Protection

Distance Protection

RELAY WORKING

Earthing

It provides a surface under the substation which has uniform potential nearly equal to zero or Absolute Earth Potential.

It is of two typesNeutral EarthingEquipment Body Earthing

Battery Room & Charger

Battery Bank forms the heart of GSSIt is responsible of supplying all the relay panels which are situated in control roomTypically room containing the battery bank is dark in color to avoid the evaporation of solution inside the battery

Wave Trap

Wave trap is used for power line carrier communication purpose as a Low pass filter which allow power frequency signal to pass and high frequency signals are blocked. It is connected to the main incoming feeder so that it can trap the waves which may be dangerous to the instruments present in the substation.

PLCCProtection signaling, speech and data transmission for system operation and control, management information systems etc. are the main needs which are met by PLCC.

High frequency signals in the range of 50 KHZ to 400 KHZ commonly known as the carrier signal and to result it with the protected section of line suitable coupling apparatus and line traps are employed at both ends of the protected section

The main application of power line carrier has been from the purpose of supervisory control telephone communication, tele-metering and relaying.

ConclusionThe training at grid substation has improved my understanding of the subject electrical power transmission and distribution. During the training period, I came to know that, there is a much difference between theoretical understanding and practical approach to the subject.

If we see the transformer it is shown in textbooks two windings changing the voltage level which seems very easy concept.

But practically it is a huge machine with a no. of parts and fittings, protection devices each of which is designed with a very specific purpose.

But of course to design new technology, theoretical knowledge has its own importance but without practical touch, it is of no use.

THANK YOUTHANK YOU