WorksheetsTransmission Line and Power Systems Quiz
Total questions: 10
Worksheet time: 5mins
Which constants are used to represent a transmission line as a two-port network for power flow analysis?
PQRS
ABCD
XYZW
LMNO
In a lossless transmission line, the maximum real power transfer occurs when the load angle (δ) is:
0°
45°
90°
180°
What does the determinant of the ABCD matrix equal for a linear, passive, bilateral two-port network?
0
1
A × D
B × C
The power circle diagram is used to represent:
Voltage regulation versus line length
Real and reactive power at the receiving end for varying load angle
Surge impedance loading versus frequency
Thermal limit of transmission lines
Surge Impedance Loading (SIL) of a transmission line is defined as:
The MW loading at which reactive power flow is zero
The maximum thermal limit of the line
The MW loading at which voltage collapse occurs
The MW loading at which power angle is 90°
Which of the following statements about reactive power and voltage control is TRUE?
Reactive power can be transmitted over long distances without voltage issues
Voltage control in power systems is primarily achieved by controlling reactive power
Frequency control and voltage control are managed in the same way
Reactive power flow does not affect system losses
What is the primary purpose of series capacitors in transmission lines?
Increase line capacitance
Reduce series reactance and improve stability
Absorb reactive power under light load
Control frequency of the system
Which FACTS device can independently control both real and reactive power flow?
SVC
STATCOM
TCSC
UPFC
For practical operation, the transmission line load angle (δ) is usually limited to:
0°–10°
15°–25°
30°–45°
60°–90°
The Ferranti Effect refers to:
Voltage drop at the receiving end under heavy load
Voltage rise at the receiving end under light load or open circuit
Reactive power absorption by transformers
Increase in surge impedance loading
