1) Non stop run from Vijayawada to Renigunta - 377 km may not be possible, go give halt at Nellore as it is district headquarters.
2) Arakkonam - Chengalpattu section is not fully electrified. Arakkonam - Takkolam is not electrified and can't say when electrification will complete as this section has some issues (attached screenshot for your reference). If you want to run with electric loco divert this train via Chennai Egmore or loco must be changed at Arakkonam to diesel loco.