what are the advantages by using IGBT in VSC HVDC than
thyristor in conventional HVDC
Answer Posted / jawad
As we know that IGBT can be controlled in both turning on
and turning off conditions, so we can control the switching
frequency during conversion, hence we would make switching
for very small instant and would get a smooth and less noise
sine wave. while in case of thyristor, we can only control
it in "on" condition, so switching would affect and we can't
get desired smooth and less noise sine wave at output.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com
Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason
Why do we avoid electrical conduits in floors at apartments?
A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?
difference between ac series and parallel circuit
Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage
what is smartµ grid technology?under coal gassification?
A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.
Why increase in current leads to increase in conductor temperature?
would the same effect be achieved by reversing the connection to one winding of the induction motor 3-phase?
what is the transformer turn ratio formula and give some examples?
what is meant by impedance & transient protection?
Why efficiency in thermal power plant is low?
What is the difference between the relay and the circuit breaker?
How to identify the start and end of 3phase 12 lead motor if U1, U2, etc numberings are lost or erased.