• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

How Engineering Works

  • Home
  • MCQ
    • Electrical MCQ
    • Civil MCQ
    • Mechanical MCQ
  • Interview Questions
  • About Us
  • Privacy Policy
  • Disclaimer
  • Contact Us

What is reactive power? What is the use of reactive power?

January 10, 2018 by

DWQA Questions › What is reactive power? What is the use of reactive power?
0 Vote Up Vote Down
admin Staff asked 5 years ago
2 Answers
0 Vote Up Vote Down
admin Staff answered 5 years ago

In electric power transmission and distribution, volt-ampere reactive (var) is a unit by which reactive power is expressed in an AC electric power system.Reactive power exists in an AC circuit when the current and voltage are not in phase.

Reactive power is both the problem and solution to the power system network for several reasons. It plays an important role in the electrical power system for various functions such as satisfying the reactive power requirement, improving the voltage profiles, decreasing the network loss, providing sufficient reserve to ensure system security in emergencies, and other several functions. Let us discuss some of the reasons in brief, which makes reactive power so important.
1. Voltage Control
2. To Satisfy Reactive Power Demand
3. To Reduce Electrical Blackout
4. To Produce Magnetic Flux

0 Vote Up Vote Down
admin Staff answered 5 years ago

What is Reactive Power?
It is the quantity that has become a fundamental concept to the analysis and understanding of AC electric power system. In general, this quantity is only defined for Alternating Current (AC) electric systems.

Uses

  • Active power is the energy supplied to  run a motor, heat a home, or illuminate an electric light bulb. Reactive  power provides the important function of regulating voltage.
  • If voltage on the system is not high enough, active power cannot be supplied.
  • Reactive power is used to provide the voltage levels necessary for active power to do useful work.

 

Primary Sidebar

Related Questions

  • What is real, reactive, and apparent power? asked by admin
  • What are the causes of building collapse? asked by admin
  • How to convert KVA to KW? asked by
  • Sequence of questions during opening and closing of a substation circuit? asked by admin

INTERVIEW QUESTIONS

MCQ or Objective


Recommended Post

MCQs on Power Generation

MCQs on Basic Electrical

MCQs on Switchgear and Protection

MCQ on Alternator – 2

Top Electricity Companies

Categories



Join Our Whatsapp Group


About Us | Privacy Policy | Disclaimer


Copyright@ Since-2017