1. The peak load of a system is simply the highest demand that has occurred over a specified time period. Peak demand is typically characterized as annual, daily or seasonal and has the unit of power. It is used in energy demand management describing a period in which electrical power is expected to be provided for a sustained period at a significantly higher than average supply level.
2. Peak load is the time of high demand. These peaking demands are often for only shorter durations. In mathematical terms, peak demand could be understood as the difference between the base demand and the highest demand.
on-peak, peak demand
Electric power distribution, Electricity
https://en.wikipedia.org/wiki/Peak_demand#Peak_load (1.); http://sinovoltaics.com/learning-center/basics/base-load-peak-load/ (2.)
Author: Laura Saupe