Power Electronics - 8

The transfer function approach is applicable to:

• Only linear-time invariant systems

• Linear-time invariant as well as time-varying system

• Linear as well as non-linear system

• All system

Which component is commonly used for isolation in gate drivers?

• Optocoupler

• Transformer

• Inductor

• Resistor

What purpose does the DC link capacitor in a UPQC serve?

• To store energy for reactive power compensation

• To filter out harmonics

• To stabilise the voltage between the series and shunt inverters

• To improve efficiency

Voltage swell is defined as:

• A temporary drop in voltage

• A temporary rise in voltage

• A permanent drop in voltage

• A permanent rise in voltage

The eigenvalues of the matrix A in the state-space representation correspond to:

• The system's zeros

• The system's poles

• The system's inputs

• The system's outputs

In Sliding Mode Control, chattering refers to:

• Smooth control action

• High-frequency oscillations due to rapid switching

• A phase shift in the control signal

• A delay in the system response

Which of the following is true about Sliding Mode Control?

• It is less effective in the presence of model uncertainties.

• It can handle non-linearities and uncertainties effectively.

• It is only applicable to discrete-time systems.

• It is based on a fixed control law without switching.

Active filters for power quality improvement can be configured to:

• Only filter harmonics at a fixed frequency

• Adapt to varying levels of harmonics in real-time

• Work without any feedback mechanism

• Reduce power factor to zero

Which of the following components are NOT typically part of a passive filter for power quality?

• Resistor

• Inductor

• Capacitor

• Operational Amplifier

Which of the following is an advantage of using active filters over passive filters for power quality?

• Simplicity of design

• Ability to compensate for both current and voltage harmonics

• No need for an external power supply

• Low initial cost