OSeMOSYS in Veda

Not a Black Box — Trust the Process? Allow us to explain.

When extending Veda to support OSeMOSYS, we didn’t build an entirely new system. The core of Veda — its robust and well-defined data containers (database tables) — was already in place, designed to store structured modeling information derived from TIMES input files.

Previously, a specific reading methodology and a set of processing rules allowed Veda to populate these containers using TIMES data. With the integration of OSeMOSYS, we have now implemented an additional reading methodology and made targeted adjustments to the rules to interpret OSeMOSYS CSV inputs in a consistent and reliable manner.

Through carefully designed mappings (see tables below), the OSeMOSYS data is translated and populated into the same underlying containers used by TIMES models. This reinforces a critical architectural strength of Veda:

These data containers are not bound to any one modeling framework — they are designed to be flexible and extensible.

Once the data is correctly ingested, the full power of Veda becomes available to OSeMOSYS users:

• The input data can be explored instantly in a rich, intuitive interface
• Scenarios can be created and managed using the Run Manager
• Models can be launched directly from the UI
• Results are displayed with powerful pivot tools and dynamic visualizations

We’ve also validated the processing by comparing key model outputs — including objective values — and confirmed that results align as expected. Maintaining the integrity of your model is, and always will be, a top priority.

This integration means that the OSeMOSYS community now gains access to a tool that has matured over 25 years, shaped by the evolving needs of the TIMES modeling community. Every UI element, every workflow enhancement, and every analytical tool in Veda reflects years of feedback, iterations, and real-world usage.

Now, that same depth of capability is available to OSeMOSYS users — without compromise.

OSeMOSYS Parameters list

name	indices	topology_in_out	process_set_name	commodity_set_name
YearSplit	[l,y]
DiscountRate	[r]
DaySplit	[lh,y]
Conversionls	[l,ls]
Conversionld	[ld,l]
Conversionlh	[lh,l]
DaysInDayType	[ls,ld,y]
TradeRoute	[r,rr,f,y]		IRE
DepreciationMethod	[r]
SpecifiedAnnualDemand	[r,f,y]
SpecifiedDemandProfile	[r,f,l,y]
AccumulatedAnnualDemand	[r,f,y]			DEM
CapacityToActivityUnit	[r,t]
CapacityFactor	[r,t,l,y]
AvailabilityFactor	[r,t,y]
OperationalLife	[r,t]
ResidualCapacity	[r,t,y]
InputActivityRatio	[r,t,f,m,y]	in
OutputActivityRatio	[r,t,f,m,y]	out
CapitalCost	[r,t,y]
VariableCost	[r,t,m,y]
FixedCost	[r,t,y]
TechnologyToStorage	[r,t,s,m]
TechnologyFromStorage	[r,t,s,m]
StorageLevelStart	[r,s]
StorageMaxChargeRate	[r,s]
StorageMaxDischargeRate	[r,s]
MinStorageCharge	[r,s,y]
OperationalLifeStorage	[r,s]
CapitalCostStorage	[r,s,y]
ResidualStorageCapacity	[r,s,y]
CapacityOfOneTechnologyUnit	[r,t,y]
TotalAnnualMaxCapacity	[r,t,y]
TotalAnnualMinCapacity	[r,t,y]
TotalAnnualMaxCapacityInvestment	[r,t,y]
TotalAnnualMinCapacityInvestment	[r,t,y]
TotalTechnologyAnnualActivityUpperLimit	[r,t,y]
TotalTechnologyAnnualActivityLowerLimit	[r,t,y]
TotalTechnologyModelPeriodActivityUpperLimit	[r,t]
TotalTechnologyModelPeriodActivityLowerLimit	[r,t]
ReserveMarginTagTechnology	[r,t,y]
ReserveMarginTagFuel	[r,f,y]
ReserveMargin	[r,y]
RETagTechnology	[r,t,y]
RETagFuel	[r,f,y]
REMinProductionTarget	[r,y]
EmissionActivityRatio	[r,t,e,m,y]	out
EmissionsPenalty	[r,e,y]
AnnualExogenousEmission	[r,e,y]
AnnualEmissionLimit	[r,e,y]
ModelPeriodExogenousEmission	[r,e]
ModelPeriodEmissionLimit	[r,e]
DiscountRateStorage	[r,s]

OSeMOSYS and TIMES Parameters mapping

times_parameter	osemosys_parameter
G_YRFR	YearSplit
G_DRATE	DiscountRate
	DaySplit
	Conversionls
	Conversionld
	Conversionlh
	DaysInDayType
	TradeRoute
	DepreciationMethod
COM_PROJ	SpecifiedAnnualDemand
COM_FR	SpecifiedDemandProfile
COM_CUMNET	AccumulatedAnnualDemand
PRC_CAPACT	CapacityToActivityUnit
NCAP_AF	CapacityFactor
NCAP_AFA	AvailabilityFactor
NCAP_TLIFE	OperationalLife
PRC_RESID	ResidualCapacity
VDA_FLOP	InputActivityRatio
PRC_ACTFLO	OutputActivityRatio
NCAP_COST	CapitalCost
ACT_COST	VariableCost
NCAP_FOM	FixedCost
	TechnologyToStorage
	TechnologyFromStorage
	StorageLevelStart
	StorageMaxChargeRate
	StorageMaxDischargeRate
	MinStorageCharge
NCAP_TLIFE	OperationalLifeStorage
NCAP_COST	CapitalCostStorage
PRC_RESID	ResidualStorageCapacity
NCAP_DISC	CapacityOfOneTechnologyUnit
CAP_BND	TotalAnnualMaxCapacity
CAP_BND	TotalAnnualMinCapacity
NCAP_BND	TotalAnnualMaxCapacityInvestment
NCAP_BND	TotalAnnualMinCapacityInvestment
ACT_BND	TotalTechnologyAnnualActivityUpperLimit
ACT_BND	TotalTechnologyAnnualActivityLowerLimit
ACT_CUM	TotalTechnologyModelPeriodActivityUpperLimit
ACT_CUM	TotalTechnologyModelPeriodActivityLowerLimit
NCAP_PKCNT	ReserveMarginTagTechnology
COM_PEAK	ReserveMarginTagFuel
COM_PKRSV	ReserveMargin
UC_FLO (UCN=RPS)	RETagTechnology
UC_FLO (UCN=RPS)	RETagFuel
UC_RHS (UCN=RPS)	REMinProductionTarget
FLO_EMIS	EmissionActivityRatio
COM_TAXNET	EmissionsPenalty
	AnnualExogenousEmission
COM_BNDNET	AnnualEmissionLimit
	ModelPeriodExogenousEmission
COM_CUMNET	ModelPeriodEmissionLimit
	DiscountRateStorage

OSeMOSYS and TIMES Sets mapping

name	times_set	index
YEAR	MILESTONYR	y
TECHNOLOGY	PRE,IRE,ELE,CHP,DMD	t
TIMESLICE	TIME_SLICE	l
FUEL	NRG,DEM	f
EMISSION	ENV	e
MODE_OF_OPERATION		m
REGION	REGION	r
SEASON	SEASON	ls
DAYTYPE	WEEKLY	ld
DAILYTIMEBRACKET	DAYNITE	lh
STORAGE	STG,STS	s

OSeMOSYS and TIMES result variables mapping

name	veda_name	indices
RateOfDemand		[r,l,f,y]
Demand		[r,l,f,y]
RateOfStorageCharge		[r,s,ls,ld,lh,y]
RateOfStorageDischarge		[r,s,ls,ld,lh,y]
NetChargeWithinYear		[r,s,ls,ld,lh,y]
NetChargeWithinDay		[r,s,ls,ld,lh,y]
StorageLevelYearStart		[r,s,y]
StorageLevelYearFinish		[r,s,y]
StorageLevelSeasonStart		[r,s,ls,y]
StorageLevelDayTypeStart		[r,s,ls,ld,y]
StorageLevelDayTypeFinish		[r,s,ls,ld,y]
StorageLowerLimit		[r,s,y]
StorageUpperLimit		[r,s,y]
AccumulatedNewStorageCapacity		[r,s,y]
NewStorageCapacity		[r,s,y]
CapitalInvestmentStorage		[r,s,y]
DiscountedCapitalInvestmentStorage		[r,s,y]
SalvageValueStorage		[r,s,y]
DiscountedSalvageValueStorage		[r,s,y]
TotalDiscountedStorageCost		[r,s,y]
NumberOfNewTechnologyUnits		[r,t,y]
NewCapacity	VAR_Ncap	[r,t,y]
AccumulatedNewCapacity		[r,t,y]
TotalCapacityAnnual	VAR_Cap	[r,t,y]
RateOfActivity		[r,l,t,m,y]
RateOfTotalActivity		[r,t,l,y]
TotalTechnologyAnnualActivity	VAR_Act	[r,t,y]
TotalAnnualTechnologyActivityByMode		[r,t,m,y]
TotalTechnologyModelPeriodActivity		[r,t]
RateOfProductionByTechnologyByMode		[r,l,t,m,f,y]
RateOfProductionByTechnology		[r,l,t,f,y]
ProductionByTechnology	VAR_FOut	[r,l,t,f,y]
ProductionByTechnologyAnnual		[r,t,f,y]
RateOfProduction		[r,l,f,y]
Production		[r,l,f,y]
RateOfUseByTechnologyByMode		[r,l,t,m,f,y]
RateOfUseByTechnology		[r,l,t,f,y]
UseByTechnologyAnnual		[r,t,f,y]
UseByTechnology	VAR_Fin	[r,l,t,f,y]
Use		[r,l,f,y]
Trade		[r,rr,l,f,y]
TradeAnnual		[r,rr,f,y]
ProductionAnnual		[r,f,y]
UseAnnual		[r,f,y]
CapitalInvestment	Cost_Inv	[r,t,y]
DiscountedCapitalInvestment		[r,t,y]
SalvageValue		[r,t,y]
DiscountedSalvageValue		[r,t,y]
OperatingCost		[r,t,y]
DiscountedOperatingCost		[r,t,y]
AnnualVariableOperatingCost	Cost_Act	[r,t,y]
AnnualFixedOperatingCost	Cost_Fom	[r,t,y]
TotalDiscountedCostByTechnology		[r,t,y]
TotalDiscountedCost	Reg_ACost	[r,y]
ModelPeriodCostByRegion	Reg_obj	[r]
TotalCapacityInReserveMargin		[r,y]
DemandNeedingReserveMargin		[r,l,y]
TotalREProductionAnnual		[r,y]
RETotalProductionOfTargetFuelAnnual		[r,y]
AnnualTechnologyEmissionByMode		[r,t,e,m,y]
AnnualTechnologyEmission	VAR_FOut	[r,t,e,y]
AnnualTechnologyEmissionPenaltyByEmission	Cost_Comx	[r,t,e,y]
AnnualTechnologyEmissionsPenalty		[r,t,y]
DiscountedTechnologyEmissionsPenalty		[r,t,y]
AnnualEmissions		[r,e,y]
ModelPeriodEmissions		[r,e]

Topology is defined using the following parameters

• InputActivityRatio
• OutputActivityRatio
• EmissionActivityRatio

Type and Set Identification

• Emission commdities - Commodity Set ENV
• Fuel commdities - Commodity Set NRG
• ReserveMarginTagFuel comodities - Type and Set NRG, SubType ELC
• All Technologies Set = PRE
• All Technologies having TradeRoute parameter defined Type and Set IRE
• ReserveMarginTagTechnology Technologies Type and Set ELE
• Commodities of SubType ELC which are defined as "IN" and "OUT" both in toplogy for such non storage processes. Type and Set IRE

Primary Commodity Group identification

• Commodities of SubType ELC which are deined as "OUT" in toplogy for such process commodity combination. PCG = Commodity
• Commodities of SubType ELC which are deined as "IN" and "OUT" both in toplogy for such non storage processes. Type and Set IRE. PCG = NRG

You can start with your CSV files and Veda will take care of the rest.

Users are expected to have CSV files as starting point. Each file contains data for one parameter or set only. All the data in OSeMOSYS model(CSV files) are treated as base scenario. With the help of Veda Application you can create multiple scenarios.