Emails us- support@assignmnetanswers.com. Call US

Assignment help 7122

A three-phase synchronous Y-connected generator has negligible armature resistance and synchronous reactance of 2 ?. The generator is connected to an infinite bus, where its terminal voltage remains fixed at 15 kV. The generator delivers 100 MVA at 0.8 power factor lagging. Mechanical losses and saturation effects can be ignored.(a) Find the line current of the machine, its internal generated voltage EA, and power angle ?.

(b) Recall that if V? is the phase terminal voltage, the active supplied by the generator to the system is P =(3 V? EA sin ?) / XS. Show that the reactive power supplied by the generator is Q =(3V? / XS)(EA cos ? ? V?).

(c) If the field current is reduced by 10%, while the mechanical power input to the machine is maintained constant, determine the new value for the power angle and the reactive power delivered to the system.

(d) The prime mover is next adjusted without changing the excitation so that the machine delivers zero reactive power to the system. Find the new power angle and the real power being delivered to the system.

(e) What is the maximum reactive power that the machine can deliver if the level of excitation is maintained as in (b) and (c)?

Solution:

15% off for this assignment.

Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!

Why US?

100% Confidentiality

Information about customers is confidential and never disclosed to third parties.

Timely Delivery

No missed deadlines – 97% of assignments are completed in time.

Original Writing

We complete all papers from scratch. You can get a plagiarism report.

Money Back

If you are convinced that our writer has not followed your requirements, feel free to ask for a refund.