The project work assigned to us was to /33 KV EHV substation - electrical design. The power from kV substation single line diagram. Starting from. Training Report on to KV Substation - Free download as PDF File .pdf), ü Single line diagram (SLD) Site Selection & Layout KV Substation: . One Line Diagram of Kv Grid Station Khanewal {01} - Free download as Word Doc .doc), isolator, circuit breaker, earth isolator and potential transformer.

Single Line Diagram 132 Kv Substation Pdf Download

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SINGLE LINE DIAGRAM OF /33 KV GRID SUB - STATION BETTIAH. KV Transfer Bus. KV Main Bus. 33 KV Main Bus. 20 MVA. ABB Make. Tr. No. Single Line Diagram of Substations Substations Electric power is produced at . iii) Bus-bars: kV-Double bus, 66kV-Double bus, 11kV bus iv) Transformers. Basically, Sub-station consists of power transformers, circuit breakers, relays, isolators, earthing switches, constructional features 4 3 SINGLE LINE DIAGRAM 6 Feeder Circuit 6 Transformer Circuit 6 Construction of the substation 5 Single line dig of a /kv substation 7 (i) Surge Download pdf.

The measuring instruments are designed for low value of voltages. Potential transformers are connected in lines to supply measuring instruments and protective relays. These transformers make the low voltage instruments suitable for measurement of high voltages. Circuit breaker CB : Circuit breakers are used for opening or closing a circuit under normal as well as abnormal faulty conditions. Different types of CBs which are generally used are oil circuit breaker, air-blast circuit breaker, vacuum circuit breaker and SF6 circuit breaker.

Isolators or Isolating switches: Isolators are employed in substations to isolate a part of the system for general maintenance.

Isolator switches are operated only under no load condition. They are provided on each side of every circuit breaker. Lightning arresters LA : Lightning arresters are the protective devices used for protection of equipment from lightning strokes. They are located at the starting of the substation and also provided near the transformer terminals.

Earth switch: It is a switch normally kept open and connected between earth and conductor. If the switch is closed it discharges the electric charge to ground, available on the uncharged line. Wave trap: This equipment is installed in the substation for trapping the high frequency communication signals sent on the line from remote substation and diverting them to the telecom panel in the substation control room.

Coupling capacitor: A coupling capacitor is used in substations where communication is done by AC power line.

Training Report on 220 to 132KV Substation

It offers very low impedance to high frequency carrier signal and allows them to enter the line matching unit and blocks the low frequency signal. Bus-bar: When number of lines operating at the same voltage levels needs to be connected electrically, bus-bars are used.

Bus-bars are conductors made of copper or aluminum, with very low impedance and high current carrying capacity. Single bus-bar arrangement: It consists of single bus-bar. Both incoming and outgoing lines are connected to the single bus-bar. The advantages of this arrangement are low maintenance, low initial cost and simple operation.

The drawback of this arrangement is if any repair work is to be done on bus-bar, complete system get interrupted. Figure below shows that three incoming and three outgoing line are connected to the single bus arrangement.

Single bus-bar with sectionalisation: Single bus-bar is divided into sections. Any two sections are connected by circuit breaker and isolators. During fault or maintenance particular section can be de-energised.

chichawatni. Fifth is fauji kabirwala. Six is perowal.

This eliminates complete shutdown of the system. Figure below shows that two incoming and two outgoing lines are connected bus section 1 and other two incoming and two outgoing lines are connected bus section 2. Double bus-bar arrangements: This arrangement is also known as duplicate bus-bar system. Incoming line and outgoing lines can be connected to either bus by means of bus coupler breaker and isolators.

Electrical substation

Continuity of supply to the circuit can be maintained during maintenance of main bus-bar or fault occurring on it. For any unwanted fault over the station we need to break the line current.

This is only done automatically by the circuit breaker. There are mainly two types of circuit breakers used for any substations. They are a SF6 circuit breakers; b spring circuit breakers.

The use of SF6 circuit breaker is mainly in the substations which are having high input kv input, say above kv and more. The gas is put inside the circuit breaker by force ie under high pressure.

When if the gas gets decreases there is a motor connected to the circuit breaker. The motor starts operating if the gas went lower than There is a meter connected to the breaker so that it can be manually seen if the gas goes low.

The circuit breaker uses the SF6 gas to reduce the torque produce in it due to any fault in the line. The circuit breaker has a direct link with the instruments in the station, when any fault occur alarm bell rings. The spring type of circuit breakers is used for small kv stations. The spring here reduces the torque produced so that the breaker can function again. The spring type is used for step down side of kv to 33kv also in 33kv to 11kv and so on.

They are only used in low distribution side. Line isolator : The line isolators are used to isolate the high voltage from flow through the line into the bus.

This isolator prevents the instruments to get damaged. It also allows the only needed voltage and rest is earthed by itself. BUS : The bus is a line in which the incoming feeders come into and get into the instruments for further step up or step down. The first bus is used for putting the incoming feeders in la single line.

There 16 may be double line in the bus so that if any fault occurs in the one the other can still have the current and the supply will not stop. This is so that one can work at a time and the other works only if the first is having any fault. Potential transformers with bus isolators : There are two potential transformers used in the bus connected both side of the bus.

The potential transformer uses a bus isolator to protect itself. The main use of this transformer is to measure the voltage through the bus.

This is done so as to get the detail information of the voltage passing through the bus to the instrument. There are two main parts in it a measurement; b protection. Isolators : The use of this isolator is to protect the transformer and the other instrument in the line.

The isolator isolates the extra voltage to the ground and thus any extra voltage cannot enter the line. Thus an isolator is used after the bus also for protection. Current transformer : Current transformers are used after the bus for measurement of the current going out through the feeder and also for protection of the instruments. Circuit breaker : The circuit breakers are used to break the circuit if any fault occurs in the circuit of the any feeders.

Lightening arrestors : The use of lightening arrestors after the bus is to protect the instrument in the station so that lightening would not affect the instruments in the station.

Transformer : There are three transformers in the incoming feeders so that the three lines are step down at the same time.

In case of a kv or more kv line station auto transformers are used. While in case of lower kv line such as less than kv line double winding transformers are used. Lightening arrestors with earth switch : The lightening arrestors are used with earth switch so that lightening would not pass through the instruments in the station.

Circuit breaker : The circuit breakers are used to break the circuit for any fault. Current transformer : Current transformers are used to measure the current passing through the transformer.

Its main use is of protection and measurement. Isolator : These are used to ground the extra voltage to the ground.Forth is chichawatni.

One Line Diagram Of 132 Kv Grid Station Khanewal

They are only used in low distribution side. The circuit breaker has a direct link with the instruments in the station, when any fault occur alarm bell rings. The electrical circuit length between LA and the transformer bushing terminal should not exceed the limits given below: Rated system BIL Max.

These are sets of busbars , usually in multiples of three, since three-phase electrical power distribution is largely universal around the world.

The development of the microprocessor made for an exponential increase in the number of points that could be economically controlled and monitored. Some substations provide facilities for switching operations of transmission lines, others are converting stations.