Single phase Power delivered Per phase voltage Current flowing through the transmission line
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
![A load of 120 MW at a power factor of 0.8 lagging can be delivered by a 3-phase transmission line. The voltage at the
receiving end is to be maintained at 33 kV and the loss in the transmission as 7.5 % of the power delivered. (Consider
the line to be a short transmission line) Find
of
Single phase Power delivered
tion
Per phase voltage
Current flowing through the transmission line
3 Phase Losses in the transmission line
Per phase resistance of the transmission line
A 3-phase, 50 Hz, 35 km long overhead line supplies 500 kW at 22 kV, 0.8 p.f. lagging. The line resistance is 4 2 per
phase and line inductance is 10 mH per phase. Calculate the Reactance of the Line, Current flowing through the
nd voltage Yoltage regulation and Efficiency of transmission.
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Most of human energy requirement is meet by generating electrical energy. Once electrical energy is generated it is transmitted through transmission lines to the load center from generation point. There are two sources of producing electrical energy:
- Conventional sources
- Non-conventional sources
Conventional sources of energy are the form of energy which is traditionally used for generation of electrical energy such as coal, diesel, nuclear etc., The major disadvantage of most of conventional form of energies are during the energy conversion process it produces pollution but most of our energy requirement is meet by conventional sources.
In non-conventional sources its new evolving energy sources which has not been used in past as a major source of energy. This energy sources consist of renewable energy sources such as wind, solar, biogas etc. These are the clean sources of energy and people are slowly adapting these sources as their major source of energy.
Whenever the energy is generated from either source of energy it needs to be transmitted from generating stations to load centers with the help of transmission lines. The transmission line has its own resistance and reactance which causes loss to happen in transmission line.
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