1.
Three statements are given below regarding the suitable choice of HVDC converter configuration:
a. Transformer utilization factor should be nearly unity.
b. Ratio of peak inverse voltage to no load DC output voltage should be as high as possible.
c. Pulse number should be high.
Identify the correct statement and choose the correct option.
A
a, b and c
B
c and b
C
b and a
D
c and a
Answer and explanation
Correct Answer: D — c and a
A TUF close to unity is desirable as it indicates the transformer is being used efficiently. A higher pulse number reduces DC ripple and harmonics, improving smoothing and commutation. Statement b is incorrect — the PIV to no-load DC output voltage ratio should be kept low, not high, to prevent diode breakdown.