Applications of Power Electronics Objective Questions – 2

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

In HVDC transmission 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. Find the dc current in the transmission line.

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.

Solid State Relays (SSRs) have

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.

HVDC transmission lines are __________ as compared to HVAC lines.