Breaking News
Home » Basic Concepts » Why Power Plant Capacity Rated in MW and not in MVA?

Why Power Plant Capacity Rated in MW and not in MVA?

Power Plant Capacity Rated MW not MVA?

For the following reasons, a Power plant capacity rating may be expressed in MW instead of MVA.
In a Generating station, the prime mover (Turbine) generates only and only Active Power. That’s why we rated a power plant capacity in MW instead of MVA. Its mean no matter how large your generator is, but it depends on the capacity of the  engine (Prime mover/Turbine) I.e. a 50MW turbine connected to a 90MVA alternator in a power plant will generate only 50MW at full load. In short, a power plant rating is specified in terms of prime mover /Turbine (Turbine rating may be seen by nameplate rating which is in MW or Horsepower (HP) not in MVA) and not by the alternator set coupled to it.
Another thing is that, electric power company charges their consumer for kVA while they generate kW (or MW) at the power station (Power plant).They penalize their consumer for low Power factor because they are not responsible for low power factor and kVA but you. Moreover, in power plant, power factor is 1 therefore MW is equal to MVA …… (MW = MVA x P.f).
Another interesting & funny answer by one of our Facebook page fan…“Power House means, house of the Power, and we know that the unit or power is Watt. That’s why we rated power plant capacity in MW and not in MVA”.  😉
You may also read:

Why Motor rated in kW instead of kVA?

EasyEDA: A Powerful Free Circuit, Simulation & PCB Design Tool
Register now to use it for free in Your Browser. No Need to download. Lots of resources and Step by step tutorials

About Electrical Technology

All about Electrical & Electronics Engineering & Technology. Follow , Facebook , Twitter , Instagram , Pinterest & Linkedin to get the latest updates or subscribe Here to get latest Engineering Articles in your mailbox. Also, Follow

Check Also

What is PLC (Programmable Logic Controller)

Programmable Logic Controllers (PLC) for Industrial Control

PLC – Programmable Logic Controllers for Industrial Control PLC (Programmable Logic Controllers) are widely used …

15 comments

  1. sorry but MW = MWA x Cosφ(Power Factor)

  2. sir plz sent me iti 2014 janury paper my e-mail id:jugrajsinghdewda@gmail.com

  3. plz sent me iti janury exam paper my e-mail id:jugrajsinghdewda@gmail.com

  4. we cant say 90MVA ALTERNATOR WITH 50 MW PRODUCES 50 MW….. Generation unit is depend on the generator construction like pole, winding and its size all of those. bcz, it only decides the induced emf. and also speed is one of the part only but not fully depend on that turbine speed. so that is not a valid point to make mw rating. Generating stations are normally rated as Mw bcz station has to give

  5. jahangeer khan

    sir plz send me. why we use scada in power houes for monitorin. what the problem in the old system

  6. shehzad ahmed

    sir tell me ur electricle book name or i want to meet u

  7. Omid Miakhail

    Information about electricity

  8. MATHUKIYA DHAVAL A

    sir,,plz give me ..name of latest @ more suitabel
    SCADA software use in power house….

  9. Mohammed AL-Tamimi

    i am power electronic engineer

  10. if one power plant is 50MW, and have ONLY one step up transformer 50/60 MVA, so its is sufficient to transfer power to power purchaser ?

  11. If turbine does not supply any reactive power so where does reactive power com from!

Leave a Reply

Your email address will not be published. Required fields are marked *