Transmission Link Flows

In a transmission link from a supply source (Src) to a demand site (DS), the amount delivered to the demand site (i.e., the outflow from the transmission link) equals the amount withdrawn from the source (i.e., the inflow to the transmission link) minus any losses along the link.

TransLinkOutflowSrc,DS = TransLinkInflowSrc,DS - TransLinkLossSrc,DS

The losses in the transmission link are a fraction of its inflow, where the loss rates are entered as data (see Supply and Resources\Transmission Links\Transmission Losses).

TransLinkLossSrc,DS = ( TransLinkLossFromSystemSrc,DS + TransLinkLossToGroundwaterSrc,DS ) x TransLinkInflowSrc,DS

You may set constraints to model the physical, contractual or other limits on the flow from a source to a demand site, using one of two types of constraints. One type of constraint is a fixed upper bound (MaximumFlowVolume) on the amount of water flowing into the link. For example, this might represent a pipeline capacity, or a contractually limited allotment.

TransLinkInflowSrc,DS MaximumFlowVolumeSrc,DS

The other type of constraint allow you to set the maximum fraction (MaximumFlowPercent) of the demand site's supply requirement that can be satisfied from a particular source. Both of these constraints are entered as data (see Supply and Resources\Transmission Links\Linking Rules).

TransLinkOutflowSrc,DS MaximumFlowPercentSrc,DS x SupplyRequirementDS