We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For thi

We have a 12MW power plant & we inject 5-6MW power to
Orissa GRID. For this we have a 33KV/11KV switch yard
having 12.5MVA power transformer. Some times we draw power
during emergency. It is observed that during Export or
Import for load less than 500Kw the power factor is
decreasing to 0.3 . This is happening only during export or
import. During island condition TG power factor OK.Our
capacitor bank is provided with our Power plant auxilliary
load. Please suggest how I can we improve our power factor
during low load (GRID).

Question Posted / pradeep123

3 Answers
5478 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11K..

Answer / velusamy

This problem can be solved by switching off all capacitor
banks during low load. we have faced Similar type of
problem in our cement plant loads which are fluctuating in
nature which causes export / import of power fluctuation(
loads go +500kw and - 500kw withing 1 or two seconds).

The main reason for this low power factor is due to
reactive power consumption of your 12.5 MVA power
transformer.

Is This Answer Correct ?

2 Yes

2 No

We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11K..

Answer / s.balasubramanian

If you can furnish me the scheme used by you for import
export ontrol I will be able to review
balasubramanian

Is This Answer Correct ?

0 Yes

0 No

We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11K..

Answer / k.prakashchandra

During export, it may be possible to improve pf with
excitation.The low pf may also be attributed to erroneous
measurement by CT's at very low loads.Tr may also contribute
to low pf to some extent depending on positions of pf meter
and capacitor bank .

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

HOW BETTER VOLTAGE REGULATION IS OBTAINED BY HIGH VOLTAGE TRANSMISSION....?

1 Answers Cummins,

how to calculate the cable size for LT and HT power cables with detail explanation?

2 Answers Asset Developments, Bhel,

What Should be the rating of transformer used in 33KV substation?

3 Answers

how capacitor pass ac voltage practically?with increase frequency and cpacitance?

1 Answers DELL,

what is the difference between diode and zener diode?

4 Answers

how to select the double earth conductor if 21A full load?

0 Answers L&T,

Capacitors are used to ... -Reduce the bill of the farmer -Improve the PF

1 Answers

How to convert a two phase power into a three phase power in induction machine?

0 Answers

Can without battery on line UPS,off line UPS or Invertor works please brief.

5 Answers

which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

0 Answers

Procedure for conduting vector group test on power transformers.why it is conducted?

6 Answers Grasim,

What is the basic working principle of Tri vector meter?

5 Answers TCS,

For more Electrical Engineering Interview Questions Click Here