You Do Need power plug adapter while traveling from Bangladesh to South Sudan.

Here is Why You Need An Adapter

The outlet and plug type used in South Sudan are C and D and in Bangladesh are A, C, D, G and K. This is how they look like.

Bangladesh

In Bangladesh, outlets of type A, C, D, G and K are in use.

Type A

Type C

Type D

Type G

Type K

South Sudan

In South Sudan, outlets of type C and D are in use.

Type C

Type D