Basic Load Management Sequences Using ATSs

Load management strategies are used to add and subtract loads from backup power systems to ensure that the most important equipment is served, and to maximize utilization without overloading gensets. This paper describes strategies for reactive load management and proactive load management, two elementary approaches for adding and removing loads according to their assigned priorities.

In backup power systems, controls match the amount of power produced to the real-time equipment load. The most elementary example is when controls increase power output by simply increasing engine throttle to meet demand. However, if demand exceeds the maximum capacity of the genset, then the backup power system will become unable to provide sufficient power at an acceptable quality. The engine could slow or stall, leading to outages and failures.