ACDCConverter

Class Description

A unit with valves for three phases, together with unit control equipment, essential protective and switching devices, DC storage capacitors, phase reactors and auxiliaries, if any, used for conversion.

Attributes

Name Type Description
baseS ApparentPower Base apparent power of the converter pole. The attribute shall be a positive value.
idc CurrentFlow Converter DC current, also called Id. It is converter’s state variable, result from power flow.
idleLoss ActivePower Active power loss in pole at no power transfer. It is converter’s configuration data used in power flow. The attribute shall be a positive value.
maxP ActivePower Maximum active power limit. The value is overwritten by values of VsCapabilityCurve, if present.
maxUdc Voltage The maximum voltage on the DC side at which the converter should operate. It is converter’s configuration data used in power flow. The attribute shall be a positive value.
minP ActivePower Minimum active power limit. The value is overwritten by values of VsCapabilityCurve, if present.
minUdc Voltage The minimum voltage on the DC side at which the converter should operate. It is converter’s configuration data used in power flow. The attribute shall be a positive value.
numberOfValves Integer Number of valves in the converter. Used in loss calculations.
p ActivePower Active power at the point of common coupling. Load sign convention is used, i.e. positive sign means flow out from a node.
Starting value for a steady state solution in the case a simplified power flow model is used.
poleLossP ActivePower The active power loss at a DC Pole
= idleLoss + switchingLoss*
For lossless operation Pdc=Pac.
For rectifier operation with losses Pdc=Pac-lossP.
For inverter operation with losses Pdc=Pac+lossP.
It is converter’s state variable used in power flow. The attribute shall be a positive value.
q ReactivePower Reactive power at the point of common coupling. Load sign convention is used, i.e. positive sign means flow out from a node.
Starting value for a steady state solution in the case a simplified power flow model is used.
ratedUdc Voltage Rated converter DC voltage, also called UdN. The attribute shall be a positive value. It is converter’s configuration data used in power flow. For instance a bipolar HVDC link with value 200 kV has a 400kV difference between the dc lines.
resistiveLoss Resistance It is converter’s configuration data used in power flow. Refer to poleLossP. The attribute shall be a positive value.
switchingLoss ActivePowerPerCurrentFlow Switching losses, relative to the base apparent power ‘baseS’. Refer to poleLossP. The attribute shall be a positive value.
targetPpcc ActivePower Real power injection target in AC grid, at point of common coupling. Load sign convention is used, i.e. positive sign means flow out from a node.
targetUdc Voltage Target value for DC voltage magnitude. The attribute shall be a positive value.
uc Voltage Line-to-line converter voltage, the voltage at the AC side of the valve. It is converter’s state variable, result from power flow. The attribute shall be a positive value.
udc Voltage Converter voltage at the DC side, also called Ud. It is converter’s state variable, result from power flow. The attribute shall be a positive value.
valveU0 Voltage Valve threshold voltage, also called Uvalve. Forward voltage drop when the valve is conducting. Used in loss calculations, i.e. the switchLoss depend on numberOfValves * valveU0.

Relationships

Inherits from

Descendant classes

Leaf/Root class

IsLeaf IsRoot
False False

Associations

Source Class Cardinality Source Target Class Cardinality Target Source Name Source Assoc. Description Target Name Target Assoc. Description
ACDCConverter 0..* Terminal 0..1 ConverterDCSides All converters' DC sides linked to this point of common coupling terminal. PccTerminal Point of common coupling terminal for this converter DC side. It is typically the terminal on the power transformer (or switch) closest to the AC network.
ACDCConverterDCTerminal 0..* ACDCConverter 1 DCTerminals A DC converter have DC converter terminals. A converter has two DC converter terminals. DCConductingEquipment A DC converter terminal belong to an DC converter.