You Do Need power plug adapter while traveling from Abu Dhabi 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 Abu Dhabi is G. This is how they look like.

Abu Dhabi

In Abu Dhabi, outlets of type G are in use.

Type G

South Sudan

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

Type C

Type D