COUPLING_BASE

Per-port no-load base power for a unit-committed coupling group. Give a positive power magnitude; its direction follows the port’s flow direction (the same way coupling-coefficient does). When the coupling group is unit-committed, each port’s power equals its coupling coefficient times the group’s marginal level plus this base, all gated by the group’s on/off binary: P = coefficient * level + base when on, and 0 when off. Use it to model a no-load offset, such as a cogeneration unit’s no-load fuel consumption that is burned only while the unit runs. Setting a non-zero base (on any port) makes the coupling group unit-committed. Defaults to 0.