Question

In the below given circuit, the right side converter C2 operates in the ___ and ___ quadrant.

(a) second, fourth

(b) first, fourth

(c) second, third

(d) first, third

The question was asked by my school principal while I was bunking the class.

This question is from Dual Converters-1 in section Converters of Power Electronics

Answer 1

Correct option is (c) second, third

To explain I would say: The C2 converter will supply the load current in direction opposite to that supplied by the converter C1. For converter C2, when α> 90 it operates in 2nd quadrant and if α<90 both current and voltage are negative, C2 is in inverter mode and operates in 3rd quadrant.