Why reactive power is not tranferred between source and load

In summary, reactive power is not transferred between the source and load because it is used to maintain the voltage and current levels in an alternating current (AC) system. It is different from active power, which is the actual energy being transferred and used by the load. While reactive power cannot be converted directly into active power, it can be managed and balanced in the system using devices such as capacitors and inductors. Managing reactive power is important for the stability and efficiency of the power system, and it can be controlled through various devices and advanced control strategies.
  • #1
larsa
47
2
I have read that at a balanced three phase AC system reactive power is not tranferred between source and load but instead it is exchanged between system phases.

Is this true? I can't find any book or paper that corroborate this
 
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  • #2
No, not true. See the PF Insights articles on this site. AC Power Analysis, Part 1 and Part 2.
 

1. Why is reactive power not transferred between the source and load?

Reactive power is not transferred between the source and load because it is used to maintain the voltage and current levels in an alternating current (AC) system. It is necessary for the functioning of inductive and capacitive loads, but it does not result in any actual energy being transferred.

2. How is reactive power different from active power?

Reactive power, also known as imaginary power, is measured in volt-amperes reactive (VAR) and is used to maintain the voltage and current levels in an AC system. Active power, also known as real power, is measured in watts and is the actual energy being transferred and used by the load.

3. Can reactive power be converted into active power?

No, reactive power cannot be converted directly into active power. However, it can be converted into useful work by using devices such as capacitors or inductors to balance the reactive power in the system and reduce losses.

4. Why is it important to manage reactive power in a power system?

Managing reactive power is important because it helps to maintain the stability and efficiency of the power system. If there is too much reactive power, it can cause voltage fluctuations and reduce the efficiency of the system. By managing reactive power, the system can operate more smoothly and effectively.

5. How can reactive power be controlled and managed?

Reactive power can be controlled and managed through the use of devices such as capacitors, inductors, and transformers. These devices can be used to adjust the reactive power levels in the system and keep it balanced. Additionally, power system operators can also use advanced control strategies and technology to monitor and manage reactive power in real-time.

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