STUPIDSID
Solve any four Q1 (a,b,c,d,e)
1(a)
Compare IPC and EPC schemes of converter firing angle control.
5 M
1(b)
Explain current margin.
5 M
1(c)
Explain caused effects of Harmonics in HVDC system.
5 M
1(d)
What is the necessity of DC reactor in HVDC ?
5 M
1(e)
What are the advantages of HVDC transmission?
5 M
2(a)
What are the main component HVDC transmission?
10 M
2(b)
Derive equivalent circuit of 6 pulse bridge converter.
10 M
3(a)
Explain with neat diagram and waveforms the principle of 12 pulse converter.
10 M
3(b)
Explain protection against over-voltages and over currents.
10 M
4(a)
Explain two methods of EPC (Equidistance Pulse Control).
10 M
4(b)
Explain commutation failure.
10 M
5(a)
Explain means of reducing characteristics and non-characteristics harmonies on ac as well as de side of HVDC.
10 M
5(b)
Explain basic control characteristics of HVDC also explain actual control characteristics with modification.
10 M
6(a)
Explain different types of faults in HVDC link.
10 M
6(b)
Explain with neat diagram 4 waveform principle of 12 pulse converter.
10 M
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