Answer / a.p.nanjappa

THIS IS CASE USEFUL FOR UTILITY GRID MANAGEMENT.
GENERALLY EACH POWER GENERATION EQUIPMENT IS MANUFACTURED
WITH say 162MW is designed to operate on 80MVAR 0.8PF
LEADING and 30MVAR 0.8-0.9PF lEADING. THIS IS THE PROPERTY
OF gENERATOR CHARACTERISTICS.
wHEN GENERATOR IS CONNECTED (SYNCHRONIZED), WITH GRID,
THEN ,GRID DETECTS THE lOAD. AS DEMAND INCREASES THE POWER
FACTOR CHANGES FOR LAGGING TO lEADING. THE MVAR EFFECT IS
MORE IN PEAK LOADS,BASE ,..
THE EFFECT OF POWER FACTOR ON GENERATOR IS THE ROOTOR GETS
HEATED DUE TO REACTION OF ELECTROMAGNETIC FLUX DEVELOPED
BETWEEN STATOR AND ROTORS FIELD.
the stability of the grid is to be increased by MVAR
compensator or capacitor banks according grid compensation.
as Utility is another organization ,they take advantages of
capacity of genarator.as a result , generator is subjected
overheating, if operated still, the generator is pulled out
of synchronism and trips.disadvantage is shoter life due to
rotor heating and expensive repair,prolonged unscheduled
outage,revenue loss.

WHY IS RESTRICTED EARTH FUALT PROTECTION NEEDED?? WHY CANT DEIFFERENTIAL PROTECTION SUFFICE???

14 Answers  

---

What are the internal and external faults?

0 Answers  

---

in thermal power plant the steam produced is made to cool after falling on the turbine blades. my question is why this is done while the same is needed to heat up again. "jab pani ko wapis garam hi karna hai to thanda kyu karte hai"

11 Answers   Bhel,

---

Why Human body feel Electric shock ?? n in an Electric train during running , We didnt feel any Shock ? why

13 Answers   Lovely Professional University, NTPC,

---

what happen if the supply is given to the stator of the 3phase induction motor with out assembling the rotor ?

0 Answers  

---

How can one connect three source of electricity in a house..the source are 2 gen and one electricity.

2 Answers   SAUDI ARABIAN BAYTUR, Wantro Technical Services,

---

why ct output is in 5A?

3 Answers  

---

What is the size of electrical cable to be used for a space heater single phase 240V ?

3 Answers  

---

why not phase to phase fault occure in raining day in hv sub-station?

1 Answers   Getco,

---

which signal we found accurate reading of analog signal or degital signal and why?

1 Answers  

---

Why stones are layed under Transformer

4 Answers  

---

IN star -delta motors normally first operated in star mode {absulated given (r-y-b) phases after one miute change in delta mode in this case i am change phase sequience for example R -PHASE TO CHANGE Y-PHASE ;Y-PHASE TO CHANGE R-PHASE SO THIS TIME MOTOR WILL HAPPEN RUNNIG MODE EIGHTER(OR) STOP MODE(TRIP MODE)

6 Answers   MacLellan,

---