Welcome to the forum !!
All should be fine.
Voltage differences won't be an issue. All you may need to buy is a different mains lead if Taiwan's sockets differ from the US's
You'll be able to continue using your existing PSN accounts, and games won't care where you are.
There are only two restrictions:
- DLC bought with your US PSN accounts will not work with games bought in Taiwan
- You won't be able to play DVDs or BDs bought in Taiwan as the region is very probably different to the US.
Apart from those points - have fun !!