TwoTerminalLCCLine

Package: PowerOperationsOpenAPIModels · Source: Operations/Branch/TwoTerminalLCCLine.json

A Non-Capacitor Line Commutated Converter (LCC)-HVDC transmission line. As implemented in PSS/E. Impedance, voltage, and voltage-droop fields are natural units only: there is no conventional DC base voltage from which to per-unitize them.

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.
arc	integer	yes	—	An Arc defining this line from a rectifier bus to an inverter bus. The rectifier bus must be specified in the from bus and inverter bus in the to bus.
active_power_flow	number	yes	MW / pu (by power_units)	Initial condition of active power flow on the line. Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
r	number	yes	ohm	Series resistance of the DC line. Units: ohm.
power_transfer_setpoint	number or null	—	MW / pu (by power_units)	Scheduled power transfer, used when control_mode is POWER; null otherwise. Must not be specified in per-unit. A positive value is the power consumed at the rectifier bus; a negative value is the power delivered at the inverter bus (its absolute value is the generated power at the inverter bus). Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
current_transfer_setpoint	number or null	—	kA	Scheduled current transfer, used when control_mode is CURRENT; null otherwise. Units: kA.
scheduled_dc_voltage	number	yes	kV	Scheduled compounded DC voltage. By default this parameter is the scheduled DC voltage in the inverter bus. Units: kV.
rectifier_bridges	integer	yes	—	Number of bridges in series in the rectifier side.
rectifier_delay_angle_limits	MinMax	yes	rad	Minimum and maximum rectifier firing delay angle (alpha). Units: rad.
rectifier_rc	number	yes	ohm	Rectifier commutating transformer resistance per bridge. Units: ohm.
rectifier_xc	number	yes	ohm	Rectifier commutating transformer reactance per bridge. Units: ohm.
rectifier_base_voltage	number	yes	kV	Rectifier primary base AC voltage, entered in kV. Units: kV.
inverter_bridges	integer	yes	—	Number of bridges in series in the inverter side.
inverter_extinction_angle_limits	MinMax	yes	rad	Minimum and maximum inverter extinction angle (gamma). Units: rad.
inverter_rc	number	yes	ohm	Inverter commutating transformer resistance per bridge. Units: ohm.
inverter_xc	number	yes	ohm	Inverter commutating transformer reactance per bridge. Units: ohm.
inverter_base_voltage	number	yes	kV	Inverter primary base AC voltage, entered in kV. Units: kV.
control_mode	string (LCCControlMode)	—	—	Control mode of the line (PSS/E MDC). BLOCKED holds no schedule, POWER holds power_transfer_setpoint, CURRENT holds current_transfer_setpoint.
switch_mode_voltage	number	—	kV	Mode switch DC voltage. If control_mode is POWER and the DC voltage falls below this value, the line switches to current control. Units: kV.
compounding_resistance	number	—	ohm	Compounding Resistance. This parameter is for control of the DC voltage in the rectifier or inverter end. For inverter DC voltage control, the parameter is set to zero; for rectifier DC voltage control, the parameter is set to the DC line resistance; otherwise, set to a fraction of the DC line resistance. Units: ohm.
min_compounding_voltage	number	—	kV	Minimum compounded voltage. Only used in constant gamma operation (gamma_min = gamma_max), and the AC transformer is used to control the DC voltage. Units: kV.
rectifier_transformer_ratio	number	—	1	Rectifier transformer ratio between the primary and secondary side AC voltages. Units: 1.
rectifier_tap_setting	number	—	1	Rectifier transformer tap setting. Units: 1.
rectifier_tap_limits	MinMax	—	1	Minimum and maximum rectifier tap limits as a ratio between the primary and secondary side AC voltages. Units: 1.
rectifier_tap_step	number	—	1	Rectifier transformer tap step value. Units: 1.
rectifier_delay_angle	number	—	rad	Rectifier firing delay angle (alpha). Units: rad.
rectifier_capacitor_reactance	number	—	ohm	Commutating rectifier capacitor reactance magnitude per bridge. Units: ohm.
inverter_transformer_ratio	number	—	1	Inverter transformer ratio between the primary and secondary side AC voltages. Units: 1.
inverter_tap_setting	number	—	1	Inverter transformer tap setting. Units: 1.
inverter_tap_limits	MinMax	—	1	Minimum and maximum inverter tap limits as a ratio between the primary and secondary side AC voltages. Units: 1.
inverter_tap_step	number	—	1	Inverter transformer tap step value. Units: 1.
inverter_extinction_angle	number	—	rad	Inverter extinction angle (gamma). Units: rad.
inverter_capacitor_reactance	number	—	ohm	Commutating inverter capacitor reactance magnitude per bridge. Units: ohm.
rating	number	yes	MVA / pu (by power_units)	Transfer rating of the DC line, independent of the converter ratings at each end. Units: per power_units — NATURAL_UNITS: MVA, COMPONENT_BASE: pu .
rating_from	number	—	MVA / pu (by power_units)	Converter rating in the from bus. Absent means the converter imposes no limit beyond rating. Units: per power_units — NATURAL_UNITS: MVA, COMPONENT_BASE: pu .
rating_to	number	—	MVA / pu (by power_units)	Converter rating in the to bus. Absent means the converter imposes no limit beyond rating. Units: per power_units — NATURAL_UNITS: MVA, COMPONENT_BASE: pu .
operational_flow_limit	OperationalFlowLimit	—	MW / pu (by power_units)	Operator-set minimum and maximum flow in each direction, applied in addition to rating. Absent means no operational limit. Units: per power_units — NATURAL_UNITS: MW, COMPONENT_BASE: pu .
reactive_power_limits_from	MinMax	—	MVAr / pu (by power_units)	Minimum and maximum reactive power limits to the FROM node. Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
reactive_power_limits_to	MinMax	—	MVAr / pu (by power_units)	Minimum and maximum reactive power limits to the TO node. Units: per power_units — NATURAL_UNITS: MVAr, COMPONENT_BASE: pu .
loss	LossCurve	—	—	A generic loss model coefficients. It accepts a linear model with a constant loss and a proportional loss rate (MW of loss per MW of flow). It also accepts a Piecewise loss, with N segments to specify different proportional losses for different segments.
base_power	number	yes	MVA	System base power for per-unitization of this component’s per-unit fields, recorded per component in lieu of a system-level table. 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.