This data is for operational demand, which is the demand met by local
scheduled generating units, semi-scheduled generating units, and
non-scheduled intermittent generating units of aggregate capacity larger
than 30 MW, and by generation imports to the region. The operational demand
excludes the demand met by non-scheduled non-intermittent generating units,
non-scheduled intermittent generating units of aggregate capacity smaller
than 30 MW, exempt generation (e.g. rooftop solar, gas tri-generation, very
small wind farms, etc), and demand of local scheduled loads. It also
excludes some very large industrial users (such as mines or smelters).