What is saturated synchronous reactance?
What is saturated synchronous reactance?
As described in the armature winding notes, synchronous reactance is a combination of armature winding leakage reactance and a reactance used to represent armature reaction. The synchronous machine tests give the induced voltage and the current when armature reaction is greatest, for a range of field current values.
What is meant by synchronous reactance?
The Synchronous Reactance (XS) is the imaginary reactance employed to account for the voltage effects in the armature circuit produced by the actual armature leakage reactance and by the change in the air gap flux caused by the armature reaction.
What is saturated and unsaturated synchronous impedance?
This value of ZS is called the linear or Unsaturated Synchronous Impedance. However, with increasing excitation, the effect of saturation is to decrease ZS and the values beyond the linear part of the open circuit called as Saturated Value of the Synchronous Impedance.
What is saturation in generator?
Seen in some magnetic materials, saturation is the state reached when an increase in applied external magnetic field H cannot increase the magnetization of the material further, so the total magnetic flux density B more or less levels off.
How do you determine saturated synchronous reactance?
Saturated Synchronous Reactance Hence, the value of the synchronous reactance to be used in a given problem should be one calculated at the approximate load on the alternator. If the alternator is connected to the infinite bus, then its terminal voltage remains the same at the bus value. ππ (sat.) =πΈπππΌππ=π π+πππ (sat.)
How do you determine synchronous reactance?
- R a = Armature resistance.
- X s = Synchronous reactance ( X L + X a )
What do you mean by synchronous reactance and synchronous impedance?
The synchronous impedance (ZS) is an imaginary impedance employed to account for the voltage effects in the armature circuit of the alternator, which is produced by the actual armature resistance, the actual armature leakage reactance, and the effect of the armature reaction.
What is the synchronous impedance?
What is OCC and SCC?
Open circuit characteristic (OCC) and Short Circuit Characteristics (SCC) of a Synchronous generator.
What saturation means?
Saturation means holding as much moisture as possible. When you water your houseplants, you may soak them until the soil around each plant reaches saturation. The noun saturation means the act of completely soaking something until it’s absorbed as much water as it can.
What is a saturation function?
Saturation functions relate the gas-aqueous capillary pressure to aqueous, gas, and entrapped gas saturations. Model options and parameters for these functions are specified through the Saturation Function Card.
What is Xs in electrical engineering?
Xs is the synchronous reaction Ra is the armature reβ¦
What is synchronous reactance (XS)?
The Synchronous Reactance (XS) is the imaginary reactance employed to account for the voltage effects in the armature circuit produced by the actual armature leakage reactance and by the change in the air gap flux caused by the armature reaction.
What is synchronous reactance in armature?
It is the imaginary reactance employed to account for the voltage effects in the armature circuit produced by the actual armature leakage reactance and by the change in the air gap flux caused by the armature reaction. The combination of leakage reactance along with armature reaction is called as synchronous reactance.
What is Xar (inductive reactance Xar)?
The Inductive Reactance XAR is a fictitious reactance. As a result a voltage is generated in the armature circuit. Therefore, armature reaction voltage can be modeled as an inductor in series with the internally generated voltage.
What is the inductive reactance X AR?
The Inductive Reactance X AR is a fictitious reactance. As a result a voltage is generated in the armature circuit. Therefore, armature reaction voltage can be modeled as an inductor in series with the internally generated voltage. In addition to the effects of armature reaction, the stator winding also has a self-inductance and resistance.