Query about Power Factor Change in a Power Plant

In summary, the power factor at a power plant with 8 gas engines running in parallel is .8 when one engine runs and .85 when all engines are running with a p.f of .8 each. This increase in power factor is most likely due to the transformer's reactive loss. The impedance of the transformer and the per unit drop across it with one generator and with five may also play a role. The engineer of the power plant is able to provide more detailed information if needed. It is also important to specify what equipment is being used to determine the power factor, such as wattmeters, varmeters, ammeters, or Qmeters.
  • #1
rezwan17
1
0
I have a query about the power factor change in a power plant. There are 8 gas engines in parallel. When 1 engine runs with a set p.f of .8 the output at the delivery after transformer (11/132kv, step up Ynd1) is almost same. But when all generators are running with each having .80 p.f the p.f after transformer changes to .85. (All gensets are in parallel equal capacity and connected to single transformer and distance from gen to trans is comparatively small). Is this only for the transformer reactive loss or other thing is associated with this. Why the p.f increases and any calculation regarding the consumed VAr of the x-former. please specify elaborately.
If you need any further information please specify. I am the engineer of that power plant so can give you enough detail information.
 
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  • #2


what are you using to determine PF? Wattmeters, varmeters, ammeters, Qmeters ?

What is impedance of your transformer?

What would be per unit drop across transformer with one generator, and with 5 ?



old jim
 

Related to Query about Power Factor Change in a Power Plant

1. What is power factor and why is it important in a power plant?

Power factor is the ratio of real power (watts) to apparent power (volt-amperes) in an electrical system. It is important in a power plant because a low power factor can result in higher energy costs, decreased efficiency, and potential damage to equipment.

2. How does power factor change in a power plant?

Power factor can change in a power plant due to a variety of factors, including changes in the load on the system, changes in the electrical equipment being used, and the presence of reactive components such as capacitors or inductors. It can also be adjusted by the power plant operator through the use of power factor correction devices.

3. What are the consequences of a low power factor in a power plant?

A low power factor in a power plant can result in several consequences, including higher energy costs, inefficient use of electrical equipment, and potential damage to equipment due to increased heating and stress. It can also lead to power outages and disruptions in the electrical system.

4. How can power factor be measured and monitored in a power plant?

Power factor can be measured and monitored using specialized equipment such as power factor meters or power quality analyzers. These devices measure the real and apparent power in the system and calculate the power factor. Power plant operators can also track and monitor power factor over time to identify trends and make necessary adjustments.

5. What steps can be taken to improve power factor in a power plant?

To improve power factor in a power plant, operators can take several steps such as installing power factor correction equipment, implementing energy management strategies, and optimizing the use of electrical equipment. Regular maintenance and inspections of the electrical system can also help to identify and address any potential power factor issues.

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