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What is meant by Generator P.f?
the cosine of the angle between voltage and current of generator is called power factor (pf) of generator.
How reverse power will occur during synchronizing?
Reverse power flow into a generator can occur during synchronization if the generator is spinning too slowly, or the voltage phase angle is lagging relative to the power system. If the generator is spinning too slowly, power from the system is used by the generator to increase its' speed. If the phase angle is lagging, an initial spike of power will flow into the generator to force it into sync with the system. Typically generator's will match system frequency very closesly, and force the phase angle to leading slightly between the generator and the system. When synchronized, an extra bump of power will flow out while the generator is torqued into phase with the system. This will avoid tripping any reverse power devices.
How do you calculate power angle of a synchronous generator?
tan (phi)= (V* sin (theta) + Ia*Xs)/(V*cos (theta) +Ia*ra) theta is power factor angle torque angle= phi-theta
Basic operation of phase angle regulator?
to synchronize the angel in degrees from source to load
How do you define the synchronous generator capability limiters?
SYNCHRONOUS GENERATOR CAPABILITY LIMITTsynchronous generator capability limiters are as follows 1.MVA or armature current limit of generator: this depends on the cooling system of generator so that temperature rise in generator is limited to safe value.depending on cooling system effectiveness and temperature limit for the insulation used in generator, MVA limit is decided.2.MW limit: this is determined by the power output capacity of prime mover to which generator is connected.3.rotor angle limit: this is related to stability of generator which is synchronised to the grid.ideally this could be 90 degree, but in practice this is limited to70 degree so as to have better stability margin in transient and dynamic condition.the generator falls out of synchronism in trasient condition if rotor angle is close to 90 degree.4. rotor current limit: the field winding placed on rotor has got limited current carrying capacity, beyond which it may burn .so this limit is used.all these limitters make capability curve of g generator within which the generators operates safelyr. k.niranjanemail id: rkniranjan@yahoo.com
What does Incoming and running generators are in same phase while paralleling two generators mean?
When two generators are to be run in parallel, one generator is first started and some load is given. Then second generator is brought in parallel with the running generator (subject few conditions, like voltage, frequency, phase angle). First generator which is running is known as running generator, the second generator which gets connected is known as incoming generator
When constructing inscribed polygons and parallel lines how are the steps different?
an angle is cpied by a compass.
When constructing inscribed polygons and parallel lines are the steps different?
an angle is cpied by a compass.
What has 2 parallel sides and 2 right angle its a quadrilateral?
A right angle trapezoid has 2 right angles, an acute angle and an obtuse angle It has a pair of opposite parallel sides of different lengths The 4 interior angles add up to 360 degrees
What angle form when two line parallel?
No angle is formed. That's what parallel means.
Why is angle of incidence is parallel to angle of reflection?
It is not!
Are the sides of an acute angle always parallel?
Sides in any angle can't be parallel. Lines intersect to form an angle.
Can parallel raysform an angle?
No.
What is a paralel angle?
Angles are considered parallel when their angle measures are the same. These angles are parallel because they are both 180*.
Can parallel lines form an angle?
no, its in the definition of parallel lines. they never touch and therefore can never form an angle.
What is meant by Generator P.f?
the cosine of the angle between voltage and current of generator is called power factor (pf) of generator.
How many parallel lines does a right angle have?
A right angle has no parallel lines, but it does have perpendicular lines that meet at right angles.
