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HVDC - May 2014 - Solapur University Question Paper

High Voltage DC Transmission
Q. 1) Solve any four (5 *4=20)

a) Explain modern trends in HVDC systems.
b) State Advantages & disadvantages of HVDC system
c) Explain different types of DC links.
d) Explain the functions of smoothing reactor.
e) Explain IPC scheme.
Q.2) Solve any two (10*2=20)
a) Draw & explain the layout of typical HVDC station.
b) Explain how power flow reversal can occur in HVDC system.
c) Explain drawbacks of IPC.
Q. 3) Solve any four (5 *4=20)

a) Enlist various faults & explain misfire operation.
b) Explain the non-characteristic harmonics & its effects.
c) Explain
(i) current margin method
(ii) Two ACR method
d) Explain static var systems
e) Explain the modified Vd-Id control characteristics.
Q.4) Solve any two (10*2=20)

a) Explain causes of overvoltages & protection against them.
b) explain different types of filters.
c) States the applications of MTDC systems.

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