Explain synchronous generators, Electrical Engineering

Assignment Help:

Explain Synchronous Generators?

They can be utilized to produce or absorb reactive power. An over-excited machine produces reactive power when an under-excited machine absorbs it. The generator is the major source of supply to the system of both of the positive and negative VArs. The ability to supply VArs is ascertained by the short-circuit ratio (1/ synchronous reactance).

For economic reasons, in current units this ratio is kept low and therefore the inherent ability to run at leading power factors is not large. For instance, a 200 MW, 0.85 p.f. machine with a 10% stability margin can just supply 45 MVAr at full power outputs.


Related Discussions:- Explain synchronous generators

Calculate the antenna aperture area, Q. Amicrowave relay systemuses two ide...

Q. Amicrowave relay systemuses two identical horn antennas mounted on towers spaced 40 km apart. If f c = 6 GHz, and each relay hop has L = 60 dB, calculate the antenna aperture a

Compute the theoretical and practical frequency, Q. An RG-139/U rectangular...

Q. An RG-139/U rectangular waveguide is given to have dimensions a = 0.8636 mm and b = 0.4318 mm. Compute the theoretical and practical frequency ranges of operation for the guide.

Which property of material allows it to drawn out in wires, Property of mat...

Property of material which allows it to be drawn out into wires is (A) Ductility.                                    (B) Solder ability. (C) Super conductivity.

Compute the power factor for zero voltage regulation, A three - phase,wye -...

A three - phase,wye - connected, 2500-kVA, 6600- V, 60-Hz turboalternator has a per-phase synchronous reactance and an armature resistance of 10.4 and 0.071 , respectively. Comput

Explain the terms dielectric constant and dielectric loss, Explain the term...

Explain the terms dielectric constant and dielectric loss. Dielectric Constant or Permittivity: all insulating materials possess an electrical capacitance. The capacitance of

Compute the load power factor, Considering Figure, let balanced positive-se...

Considering Figure, let balanced positive-sequence, three-phase voltages with ¯V AB = 100√3 0° V (rms) be applied to terminals A, B, and C. The three-phase wye-connected balanced

Requirement for an intrinsically safe circuit, Compute the ampacity of a 25...

Compute the ampacity of a 250 AWG copper conductor with type UF insulation that will be used in an area with an ambient temperature of 79°F (26°C). State the ampacity and explain h

What is the need for bias stabilization in bjt, Q. What is the need for bia...

Q. What is the need for bias stabilization in BJT? BJT or bi-polar junction transistor is a three terminal, two junction semiconductor device and the conduction is due to the m

Magnetic circuits with air gaps, The creation of a magnetic field in a ring...

The creation of a magnetic field in a ring may need to be accessed by means of an air gap. This is typically used to apply the magnetic field to a current carrying conductor to pro

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd