Terminology

Variable/Constraint Conventions

Electrolyser

variable_name	Description
mw_load	The load power consumption per interval (MW)
mw_load_sum	The sum of mw_load for all simulated intervals (MW)
h2_produced	Hydrogen production mass (kg) per interval
h2_produced_sum	The sum of h2_produced for all simulated intervals (kg)
sec_w	Weightings for the SOC-2 implementation of variable SEC
msl_violate	Violation amount for MSL, effectively distance from MSL (MW)
msl_penalise	Binary indicator signifying MSL violation and enforcing penalty cost
msl_relieve	Binary indicator signfinying load is at 0MW, relieving MSL penalty
mw_ramp	The ramp rate (either up or down) in (MW) between intervals
production_target_{bound}_{period}	The sum of h2_produced within a defined period with corresponding constraint to enforce a defined production target
h2_stored	‘Volume’ of hydrogen in storage at any interval in time (kg)
h2_stored_initial	The defined starting ‘volume’ of stored hydrogen (kg)
h2_stored_final	The defined final ‘volume’ of stored hydrogen (kg)
h2_stored_extflow	A defined external in-/out-flow (kg) of hydrogen to/from the hydrogen storage per interval

constraint_name	Description
mw_ramp_down	Determines the ramp rate (MW) between intervals when ramping down occurs
mw_ramp_up	Determines the ramp rate (MW) between intervals when ramping up occurs
mw_force	Forces the electrolyser mw_load to a defined set value when applied

Note: Most variable names also have a corresponding constraint_name which are not listed here.

Generator

variable_name	Description
vre_cap	The defined capacity of the renewable generator (MW)
vre_avail	The availability (MW trace) of the generator per interval
ppa_rec_sum	Sum of vre_avail for all simulated intervals, signifying the amount of RECs received by the load (in MW units)