Power Systems
Optimizing Diesel Generator ATS Synchronization for Zero-Downtime Plants
Engr. Tariqul Islam•August 24, 2026•8 min read
How automatic load-sharing and phase matching prevent voltage spikes and equipment stress during grid power transitions.
1. Principles of Automatic Transfer Switch (ATS) Phasing
Automatic transfer switches must execute closed-transition or synchronizing checks prior to breaker closure. Paralleling two unsynchronized AC supplies causes catastrophic torque reversals on prime movers and severe voltage dips.
2. Load-Sharing Algorithms for Multi-Generator Paralleling
Isochronous load sharing dynamically calculates real (kW) and reactive (kVAR) power split among generator sets, ensuring stable frequency regulation and eliminating hunting between governing loops.