Why are reactive power and voltage related?

[larsa]

I have read that reactive power sustains/ supports voltage. What is the reason behind this?

 

[Baluncore]

There is almost certainly somewhere where that statement is true.
We need more information on context to answer clearly.
Can you please give us a link, or a book and page number, or attach a file.

 

[larsa]

There is almost certainly somewhere where that statement is true.
We need more information on context to answer clearly.
Can you please give us a link, or a book and page number, or attach a file.

Thank you for your answer. I have done a google research and i diden't understand the reasons.I googled "reactive power and voltage control."

Besides this, at my job, when i increase the excitation( the field current ) of the generator's rotor both voltage and reactive power are increased. What is the link between them? Sorry for my english.

 

[anorlunda]

I have read that reactive power sustains/ supports voltage. What is the reason behind this?

The answer is yes. Next week a PF Insights article "AC Power Analysis Part 2" will be published explaining that very question.

 

[larsa]

The answer is yes. Next week a PF Insights article "AC Power Analysis Part 2" will be published explaining that very question.

Thank you. I will wait

 

[highvoltpower]

Voltage control in an electrical power system is important for proper operation for electrical power equipment to prevent damage such as overheating of generators and motors, to decrease transmission damages and to maintain the ability of the system to endure and prevent voltage collapse.

 

[anorlunda]

Did you read the insights article?

https://www.physicsforums.com/insights/ac-power-analysis-part-2-network-analysis/

 

[jim hardy]

Voltage control in an electrical power system is important for proper operation for electrical power equipment to prevent damage such as overheating of generators and motors, to decrease transmission damages and to maintain the ability of the system to endure and prevent voltage collapse.

to be more precise (if perhaps too brief _{and 3 months behind too})

it's because the impedances connecting nodes tends to be more inductive than resistive, see anorlunda's insights article
so by ohm's law
the voltage across them causes current that's reactive.

 

[highvoltpower]

No , i didn't read these insights article.. ok i will read first. Thanks

 

[jim hardy]

see also this recent thread

https://www.physicsforums.com/threads/voltage-and-reactive-power-relationship.876346/

 

[highvoltpower]

Hey @jim hardy Thanks for your reply.. i read Reactive Power Relationship thread. it is really helpful to me.. Again Thanks