Answer / mugunthan

Firstly, the output of power stations comes from a rotary
turbine, which by it's nature is AC and therefore requires
no power electronics to convert to DC.
Secondly it is much easier to change the voltage of AC
electricity for transmission and distribution.
thirdly the cost of plant associated with AC transmission
(circuit breakers, transformers etc) is much lower than the
equivilant of DC transmission
AC transmission provides a number of technical advantages.
When a fault on the network occurs, a large fault current
occurs. In an AC system this becomes much easier to
interupt, as the sine wave current will naturally tend to
zero at some point making the current easier to interrupt

Answer / bhasker reddy

Generation in AC 11kv is only more efficient, more than 11kv generation we are getting commutation problems in alternator,same problem in dc generator also. so generation ac. cumming to transmission for higher KV DC Transmission is efficient, cumming to distribution ac efficient and reliable.
and india equipment designed fo 230v, 50Hz. if go with DC we get low efficiency and need to change equipment design.

Answer / anil

because the electronic component is not stable & irregular for convert the ac into dc so when the fault occur there is the large time is consuming

in a 740 kw dc seperately excited motor field voltage is constant about 17.4 volts and armature voltage is500 volts dc. how it is possible to have two different voltages from single transformer of output voltage 500 volts? if any difficulty in question contact ajitsingh.kadian@gmail.com

1 Answers  

---

can a generator with 15AH specified battery for starting can be connected to a battery of greater capacity?

2 Answers  

---

What is dc current source? Differentiate between ideal and non ideal current sources?

0 Answers  

---

Why Auto Transformer is called "Auto"? What is the logic?

1 Answers  

---

what is NGR in generator?

4 Answers  

---

why the earth is taken minimum in supplying? wather it the proportional factor to getting work any equipment or a power plant?

0 Answers  

---

1.why we are using metal oxide gapless block in lightning arrester,2.What is minimum and maximum rating of metal oxide blocks using in india

0 Answers   Areva,

---

A resistance of 50 kΩ has a conductance of:(a) 20S(b) 0.02S(c) 0.02 mS(d) 20 kS

1 Answers  

---

how to calculate earth fault relay current and CBCT ratio

0 Answers   ONGC,

---

If we are given a 10 amp cable type and asked to calculate the number of cores used and the thickness of the cable, how do we do it?? please help...urgent!! i hope the question is clear enough!!

0 Answers  

---

How can remove the jerks on genretor due to remov or connecting the load ?

3 Answers  

---

in underground cables, we have a grading method called 'capacitance grading' why is it called 'capacotance grading' although we do not use any capacitor in it?

1 Answers  

---