Ramp rate control

Ramp rate control limits how fast an inverter or storage system changes its power output. On the CPS SCA25KTL-DO/US-208, ramp rate is listed as a smart-grid feature and is enabled in the IEEE 1547-2018, Rule 21 and ISO-NE settings. On SGI XTM firmware D002, the MPPT algorithm can hold the ramp-up below this setting. On firmware D003, the inverter follows the ramp rate until it reaches maximum attainable or maximum output power. In Tesla's control manuals, separate real-power and reactive-power ramp rates, in W/s or var/s, apply only to the direct real and reactive power commands and not to any other control element. In the Tesla manuals, a ramp rate of zero does not switch ramping off. To get an immediate, unramped response, set a large ramp rate value. In the Tesla manuals, if the Enable Manager cancels a direct command, for example after a command timeout or loss of meter communications, the command ramps down at the configured ramp rate.