List of top Electrical Engineering Questions on Electrical power

If a transmission line carries 100 MW at unity power factor, the reactive power is:

HVDC transmission is preferred over HVAC for very long distances because:

What is the primary purpose of a FACTS device like a STATCOM?

In Economic Load Dispatch, the most efficient operation occurs when:

In a Load Flow study, which parameters are known at a PQ (Load) bus?

In a per-unit system, the base impedance ($Z_{\text{base}}$) is defined as:

The Newton–Raphson method is preferred because it,

A balanced three-phase, star-connected source with a line-to-line RMS voltage of $400\text{ V}$ supplies a balanced star-connected load. Each phase of the load has a resistance of $20 \ \Omega$. Neglect the line impedance. Calculate the total active power consumed by the load.

An overcurrent relay operates at 1.2pu for 2 s. Fault current = 3pu. What is the expected operation time if relay is inverse-time type?

A balanced delta connected load of \( (8 + j6) \Omega \) per phase is connected to a 400 V, 50 Hz, three-phase supply lines. If the input power factor is to be improved to 0.9 by connecting a bank of star-connected capacitors, the required kVAR of the bank is _______.

Which semiconductor power device out of the following is not a current triggered device?

The advantage of hydro-electric power station over thermal power station is: