StandardLoad

Package: PowerOperationsOpenAPIModels · Source: Operations/StaticInjection/StandardLoad.json

A voltage-dependent ZIP load, most commonly used for dynamics modeling.

A StandardLoad breaks the ZIP into three pieces: Z (constant impedance), I (constant current), and P (constant power), according to P = P_P * V^0 + P_I * V^1 + P_Z * V^2 for active power and Q = Q_P * V^0 + Q_I * V^1 + Q_Z * V^2 for reactive power. (Voltage V is in per unit.)

For an alternative exponential formulation of the ZIP model, see ExponentialLoad. For a simpler load model with no voltage dependency, see PowerLoad.

Properties

Property	Type	Required	Unit	Description
`id`	`integer`	yes	—	Unique integer identifier for this component.
`name`	`string`	yes	—	Name of the component. Components of the same type (e.g., `PowerLoad`) must have unique names, but components of different types (e.g., `PowerLoad` and `ACBus`) can have the same name.
`available`	`boolean`	yes	—	Indicator of whether the component is connected and online (`true`) or disconnected, offline, or down (`false`). Unavailable components are excluded during simulations.
`bus`	`integer`	yes	—	ID of the bus that this component is connected to.
`base_power`	`number`	yes	`MVA`	Base power of the load for per unitization. Units: MVA.
`power_units`	`string (UnitSystem)`	yes	—	Unit basis for this component’s power-family fields (active/reactive/apparent power, ratings, limits, ramp rates). COMPONENT_BASE: per unit on this component’s own base_power. NATURAL_UNITS: the field’s physical unit.
`constant_active_power`	`number`	—	`MW / pu (by power_units)`	Constant active power demand (P_P). Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
`constant_reactive_power`	`number`	—	`MVAr / pu (by power_units)`	Constant reactive power demand (Q_P). Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
`impedance_active_power`	`number`	—	`MW / pu (by power_units)`	Active power coefficient for constant impedance load (P_Z). Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
`impedance_reactive_power`	`number`	—	`MVAr / pu (by power_units)`	Reactive power coefficient for constant impedance load (Q_Z). Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
`current_active_power`	`number`	—	`MW / pu (by power_units)`	Active power coefficient for constant current load (P_I). Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
`current_reactive_power`	`number`	—	`MVAr / pu (by power_units)`	Reactive power coefficient for constant current load (Q_I). Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
`max_constant_active_power`	`number`	—	`MW / pu (by power_units)`	Maximum active power drawn by constant power load. Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
`max_constant_reactive_power`	`number`	—	`MVAr / pu (by power_units)`	Maximum reactive power drawn by constant power load. Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
`max_impedance_active_power`	`number`	—	`MW / pu (by power_units)`	Maximum active power drawn by constant impedance load. Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
`max_impedance_reactive_power`	`number`	—	`MVAr / pu (by power_units)`	Maximum reactive power drawn by constant impedance load. Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
`max_current_active_power`	`number`	—	`MW / pu (by power_units)`	Maximum active power drawn by constant current load. Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
`max_current_reactive_power`	`number`	—	`MVAr / pu (by power_units)`	Maximum reactive power drawn by constant current load. Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
`conformity`	`string (LoadConformity)`	—	—	Indicates whether the specified load is conforming or non-conforming.
`dynamic_injector`	`integer or null`	—	—	ID of the corresponding dynamic injection device, if any.