StaticInjection Subtypes Comparison

This document summarizes the similarities and differences between StaticInjection subtypes in PowerSystems.jl, with emphasis on generators, loads, storage, and sources. Some control-related subtypes–like FACTS devices–are omitted from the below charts, simply because they have very little in common with the other subtypes. For all subtypes of StaticInjection, see Type Tree.

Power Limits Fields Comparison

Generators

Type	`active_power_limits`	`max_active_power`	`reactive_power_limits`	`max_reactive_power`
`ThermalStandard`	✅ `MinMax`	❌	✅ `MinMax` (optional)	❌
`ThermalMultiStart`	✅ `MinMax`	❌	✅ `MinMax` (optional)	❌
`RenewableDispatch`	❌	❌ ¹	✅ `MinMax` (optional)	❌
`RenewableNonDispatch`	❌	❌	❌	❌
`HydroDispatch`	✅ `MinMax`	❌	✅ `MinMax` (optional)	❌
`HydroTurbine`	✅ `MinMax`	❌	✅ `MinMax` (optional)	❌
`HydroPumpTurbine`	✅ `MinMax`	❌	✅ `MinMax` (optional)	❌

Loads

Type	`active_power_limits`	`max_active_power`	`reactive_power_limits`	`max_reactive_power`
`PowerLoad`	❌	✅ `Float64`	❌	✅ `Float64`
`StandardLoad`	❌	⊕	❌	⊕
`ExponentialLoad`	❌	✅ `Float64`	❌	✅ `Float64`
`MotorLoad`	❌	✅ `Float64`	✅ `MinMax` (optional)	❌
`InterruptiblePowerLoad`	❌	✅ `Float64`	❌	✅ `Float64`
`InterruptibleStandardLoad`	❌	⊕	❌	⊕
`ShiftablePowerLoad`	✅ `MinMax`	✅ `Float64`	❌	✅ `Float64`

Storage & Source

Type	`active_power_limits`	`max_active_power`	`reactive_power_limits`	`max_reactive_power`
`EnergyReservoirStorage`	❌ ²	❌	✅ `MinMax` (optional)	❌
`Source`	✅ `MinMax`	❌	✅ `MinMax` (optional)	❌

¹ Uses rating * power_factor dynamically; no stored field

² EnergyReservoirStorage uses input_active_power_limits and output_active_power_limits instead

Here, "MinMax (optional)" means Union{MinMax, Nothing}, with nothing representing "no limits" and being the default.

⊕ = Split across 3 ZIP fields: *_constant_*, *_impedance_*, *_current_*

Generator-Specific Fields

Field	Thermal*	`RenewableDispatch`	`RenewableNonDispatch`	`HydroDispatch`	`HydroTurbine`	`HydroPumpTurbine`
`rating`	✅	✅	✅	✅	✅	✅
`prime_mover_type`	✅	✅	✅	✅	✅	✅
`fuel`	✅	❌	❌	❌	❌	❌
`status`	✅	❌	❌	✅	❌	✅
`must_run`	✅	❌	❌	❌	❌	✅
`ramp_limits`	✅	❌	❌	✅	✅	✅
`time_limits`	✅	❌	❌	✅	✅	✅
`power_factor`	❌	✅	✅	❌	❌	❌
`efficiency`	❌	❌	❌	❌	✅	✅
`operation_cost`	✅	✅	❌	✅	✅	✅

* Thermal = ThermalStandard, ThermalMultiStart

Load-Specific Fields

Field	`PowerLoad`	`StandardLoad`	`ExponentialLoad`	`MotorLoad`	Interruptible*	Shiftable
`active_power`	✅	⊕	✅	✅	✅	✅
`reactive_power`	✅	⊕	✅	✅	✅	✅
`conformity`	✅	✅	✅	❌	✅	❌
`operation_cost`	❌	❌	❌	❌	✅	✅
`rating`	❌	❌	❌	✅	❌	❌
`α`, `β` (voltage exp.)	❌	❌	✅	❌	❌	❌

* Interruptible = InterruptiblePowerLoad, InterruptibleStandardLoad; Shiftable = ShiftablePowerLoad

Universal Fields (All StaticInjection)

Field	Present in ALL
`name`	✅
`available`	✅
`bus`	✅
`base_power`	✅
`services`	✅
`dynamic_injector`	✅
`ext`	✅
`internal`	✅

Operation Cost Types by Device

Device Category	Cost Type
`ThermalGen`	`ThermalGenerationCost` or `MarketBidCost`
`HydroGen`	`HydroGenerationCost` or `MarketBidCost`
`RenewableGen`	`RenewableGenerationCost` or `MarketBidCost`
`ControllableLoad`	`LoadCost` or `MarketBidCost`
`Storage`	`StorageCost` or `MarketBidCost`
`Source`	`ImportExportCost`