Applications of Power Electronics Objective Questions – 2

In HVDC transmission lines

HVDC transmission lines are __________ as compared to HVAC lines.

_____ can be used as a single phase static ac switch.

Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. What is the dc transmission voltage?

__________ can be used as a dc static switch.

A single-phase ac switch is used in between a 230 V source and load of 2 kW and 0.8 lagging power factor. Determine the rms current rating required by the SCR. Use the factor of safety = 2.

Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. Find the dc current in the transmission line.

Solid State Relays (SSRs) have

Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. Find the rms current rating required for the SCRs.

For high power applications _________ are used as static switches whereas for low power applications __________ are used.