IT Power Service Manager Interview Questions and Answers

DFIG stands for Doubly Fed Induction Generator, a type of generator used in wind turbines.

• DFIG is a type of generator commonly used in wind turbines

• It has two sets of windings - one connected to the grid and the other connected to a converter

• The converter allows control of the generator's output power and speed

• DFIG is known for its ability to provide variable speed operation and improved efficiency

• It is a popular choic...read more

Wind power is generated by harnessing the kinetic energy of wind to turn turbines, which then convert the energy into electricity.

• Wind turbines capture the kinetic energy of the wind and convert it into mechanical energy.

• The mechanical energy is then used to turn a generator, which produces electricity.

• Wind power is a renewable energy source that is clean and sustainable.

• Wind farms are large areas with multiple wind tu...read more

To check the problem in a windvane showing false reading, first ensure it is properly aligned and calibrated. Then check for any obstructions or damage.

• Ensure the windvane is properly aligned and calibrated according to manufacturer's instructions.

• Check for any obstructions such as debris or bird nests that may be affecting the vane's movement.

• Inspect the vane for any damage or wear that could be causing inaccurate rea...read more

Manpower on site is controlled through proper scheduling, supervision, communication, and monitoring.

• Create a detailed schedule outlining tasks, deadlines, and manpower requirements.

• Assign specific roles and responsibilities to each team member.

• Regularly communicate with the team to ensure everyone is on the same page.

• Supervise the work progress and address any issues or delays promptly.

• Monitor the performance of each ...read more

IGBT stands for Insulated Gate Bipolar Transistor, a semiconductor device used for switching applications in power electronics.

• IGBT is a type of transistor that combines the high efficiency of a bipolar junction transistor (BJT) with the high input impedance of a MOSFET.

• It is commonly used in applications such as motor drives, inverters, and power supplies.

• IGBTs are used for high power applications due to their ability...read more

A line diagram of a wind turbine generator (WTG) shows the flow of energy from wind to electricity.

• The diagram typically includes the rotor blades, gearbox, generator, and power electronics

• The blades capture wind energy and turn the rotor, which drives the gearbox

• The gearbox increases the rotational speed and sends it to the generator

• The generator converts the rotational energy into electrical energy

• The power electroni...read more

DFIG converters are used in wind turbines to convert variable frequency AC power to DC power and back to AC power.

• DFIG stands for Doubly Fed Induction Generator

• The converter consists of two back-to-back voltage source converters

• One converter controls the rotor current and the other controls the grid current

• The rotor current is controlled to maintain a constant torque on the turbine

• The grid current is controlled to main...read more