Answer / k.prakashchandra

When the generators(gen) are connected to grid or net work
,if all the gens are run at unity pf ,there will be drop in
voltage due to inductive load in the system as the current
increases.Then to maintain system stability, LDC requests
large generating stations to increase the voltage . This
will increase the KVAR and results in lower lagging pf in
the gens. That is why the gens are designed for 0.8/0.85
pf.The pf of gens can be kept at any value by varying
excitation or resetting in APF mode.As pf control is
required by generating stations,capacitor banks are not used
.Capacitor banks can be used in the system to reduce the
inductive load but not in the gen stations.

Answer / k.prakashchandra

Pf of generator can be brought to required value by varying
excitation.

Answer / k.prakashchandra

If the gen is connected to grid ,its pf can be regulated by
varying the excitation or by APF mode.

Answer / iqbal

In power plant no need reduse electricity bill

Answer / umkesh

One more question can be use Capacitor Bank in Aux consumption panels in Thermal Power plant like CHP

Answer / k.prakashchandra

In the line 9, read as ' As pf control is not required'.

Answer / k.prakashchandra

It is of no use to generator.

what is the difference between synchronous motor and induction motor?

3 Answers  

why we use Bus earth truck and Cable earth truck

5 Answers  

Where double earthing is required? Is there any power specification to have double earthing?

10 Answers   Delphi,

Electricty is generated at around 16kV, then step up to 220kV for transmission then steped down to power transformers then DTs and then through the LT n/w it reaches the consumer end. At the consumer end 230V supply is required. So, why is electricity not generated directly at 230V and transmitted?

4 Answers  

what is the reactance,capacitance & impedence electrical armoured & unarmored Cables.

0 Answers  

How to calculat size of copper & aluminium ?

6 Answers  

hopkinson's test

5 Answers   Bhel, NTPC,

How to calculate the time setting for star connection in star delta starter? For example 10KW 3PH Induction motor.

0 Answers   Taj Group, Tata Steel Limited,

What is Primary And Secondary Injection Test of Relay and Other Electrical Devices. How IT is carried out.

0 Answers  

what is the difference between current rating and breaking current of an MCCB? and for a known load how to calculate the current rating of a MCCB?

1 Answers   HPL,

what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?

4 Answers   NPTC, NTPC,

why some transmission lines have 7 wires n why some have 3 n 4??

3 Answers