ACDCConverter: 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.
ACDCTerminal: An electrical connection point (AC or DC) to a piece of conducting equipment.
ACLineSegment: A wire or combination of wires, with consistent electrical characteristics, building a single electrical system, used to carry alternating current between points in the power system.
AsynchronousMachine: A rotating machine whose shaft rotates asynchronously with the electrical field.
AuxiliaryEquipment: AuxiliaryEquipment describe equipment that is not performing any primary functions but support for the equipment performing the primary function.
BaseVoltage: Defines a system base voltage which is referenced.
BatteryUnit: An electrochemical energy storage device.
Bay: A collection of power system resources (within a given substation) including conducting equipment, protection relays, measurements, and telemetry.
BoundaryPoint: Designates a connection point at which one or more model authority sets shall connect to.
Breaker: A mechanical switching device capable of making, carrying, and breaking currents under normal circuit conditions and also making, carrying for a specified time, and breaking currents under specified abnormal circuit conditions e.
BusNameMarker: Used to apply user standard names to TopologicalNodes.
BusbarSection: A conductor, or group of conductors, with negligible impedance, that serve to connect other conducting equipment within a single substation.
Clamp: A Clamp is a galvanic connection at a line segment where other equipment is connected.
CogenerationPlant: A set of thermal generating units for the production of electrical energy and process steam (usually from the output of the steam turbines).
CombinedCyclePlant: A set of combustion turbines and steam turbines where the exhaust heat from the combustion turbines is recovered to make steam for the steam turbines, resulting in greater overall plant efficiency.
ConductingEquipment: The parts of the AC power system that are designed to carry current or that are conductively connected through terminals.
Conductor: Combination of conducting material with consistent electrical characteristics, building a single electrical system, used to carry current between points in the power system.
ConformLoad: ConformLoad represent loads that follow a daily load change pattern where the pattern can be used to scale the load with a system load.
ConformLoadGroup: A group of loads conforming to an allocation pattern.
ConformLoadSchedule: A curve of load versus time (X-axis) showing the active power values (Y1-axis) and reactive power (Y2-axis) for each unit of the period covered.
ConnectivityNode: Connectivity nodes are points where terminals of AC conducting equipment are connected together with zero impedance.
ConnectivityNodeContainer: A base class for all objects that may contain connectivity nodes or topological nodes.
Connector: A conductor, or group of conductors, with negligible impedance, that serve to connect other conducting equipment within a single substation and are modelled with a single logical terminal.
ControlArea: A control area is a grouping of generating units and/or loads and a cutset of tie lines (as terminals) which may be used for a variety of purposes including automatic generation control, power flow solution area interchange control specification, and input to load forecasting.
DCChopper: Low resistance equipment used in the internal DC circuit to balance voltages.
DCConductingEquipment: The parts of the DC power system that are designed to carry current or that are conductively connected through DC terminals.
DCConverterUnit: Indivisible operative unit comprising all equipment between the point of common coupling on the AC side and the point of common coupling - DC side, essentially one or more converters, together with one or more converter transformers, converter control equipment, essential protective and switching devices and auxiliaries, if any, used for conversion.
DCLine: Overhead lines and/or cables connecting two or more HVDC substations.
DCLineSegment: A wire or combination of wires not insulated from one another, with consistent electrical characteristics, used to carry direct current between points in the DC region of the power system.
DCNode: DC nodes are points where terminals of DC conducting equipment are connected together with zero impedance.
DCSeriesDevice: A series device within the DC system, typically a reactor used for filtering or smoothing.
DCShunt: A shunt device within the DC system, typically used for filtering.
DisconnectingCircuitBreaker: A circuit breaking device including disconnecting function, eliminating the need for separate disconnectors.
Disconnector: A manually operated or motor operated mechanical switching device used for changing the connections in a circuit, or for isolating a circuit or equipment from a source of power.
EarthFaultCompensator: A conducting equipment used to represent a connection to ground which is typically used to compensate earth faults.
EnergyArea: Describes an area having energy production or consumption.
EnergyConnection: A connection of energy generation or consumption on the power system model.
EnergyConsumer: Generic user of energy - a point of consumption on the power system model.
EnergySchedulingType: Used to define the type of generation for scheduling purposes.
EnergySource: A generic equivalent for an energy supplier on a transmission or distribution voltage level.
Equipment: The parts of a power system that are physical devices, electronic or mechanical.
EquipmentContainer: A modelling construct to provide a root class for containing equipment.
ExternalNetworkInjection: This class represents the external network and it is used for IEC 60909 calculations.
FaultIndicator: A FaultIndicator is typically only an indicator (which may or may not be remotely monitored), and not a piece of equipment that actually initiates a protection event.
FossilFuel: The fossil fuel consumed by the non-nuclear thermal generating unit.
Fuse: An overcurrent protective device with a circuit opening fusible part that is heated and severed by the passage of overcurrent through it.
GeneratingUnit: A single or set of synchronous machines for converting mechanical power into alternating-current power.
GeographicalRegion: A geographical region of a power system network model.
GrossToNetActivePowerCurve: Relationship between the generating unit's gross active power output on the X-axis (measured at the terminals of the machine(s)) and the generating unit's net active power output on the Y-axis (based on utility-defined measurements at the power station).
Ground: A point where the system is grounded used for connecting conducting equipment to ground.
GroundDisconnector: A manually operated or motor operated mechanical switching device used for isolating a circuit or equipment from ground.
HydroGeneratingUnit: A generating unit whose prime mover is a hydraulic turbine (e.
HydroPowerPlant: A hydro power station which can generate or pump.
HydroPump: A synchronous motor-driven pump, typically associated with a pumped storage plant.
IdentifiedObject: This is a root class to provide common identification for all classes needing identification and naming attributes.
Jumper: A short section of conductor with negligible impedance which can be manually removed and replaced if the circuit is de-energized.
Junction: A point where one or more conducting equipments are connected with zero resistance.
Line: Contains equipment beyond a substation belonging to a power transmission line.
LinearShuntCompensator: A linear shunt compensator has banks or sections with equal admittance values.
LoadArea: The class is the root or first level in a hierarchical structure for grouping of loads for the purpose of load flow load scaling.
LoadBreakSwitch: A mechanical switching device capable of making, carrying, and breaking currents under normal operating conditions.
LoadGroup: The class is the third level in a hierarchical structure for grouping of loads for the purpose of load flow load scaling.
LoadResponseCharacteristic: Models the characteristic response of the load demand due to changes in system conditions such as voltage and frequency.
NonConformLoad: NonConformLoad represents loads that do not follow a daily load change pattern and whose changes are not correlated with the daily load change pattern.
NonConformLoadGroup: Loads that do not follow a daily and seasonal load variation pattern.
NonConformLoadSchedule: An active power (Y1-axis) and reactive power (Y2-axis) schedule (curves) versus time (X-axis) for non-conforming loads, e.
NonlinearShuntCompensator: A non linear shunt compensator has bank or section admittance values that differ.
PetersenCoil: A variable impedance device normally used to offset line charging during single line faults in an ungrounded section of network.
PhaseTapChanger: A transformer phase shifting tap model that controls the phase angle difference across the power transformer and potentially the active power flow through the power transformer.
PhaseTapChangerAsymmetrical: Describes the tap model for an asymmetrical phase shifting transformer in which the difference voltage vector adds to the in-phase winding.
PhaseTapChangerLinear: Describes a tap changer with a linear relation between the tap step and the phase angle difference across the transformer.
PhaseTapChangerNonLinear: The non-linear phase tap changer describes the non-linear behaviour of a phase tap changer.
PhaseTapChangerSymmetrical: Describes a symmetrical phase shifting transformer tap model in which the voltage magnitude of both sides is the same.
PhaseTapChangerTable: Describes a tabular curve for how the phase angle difference and impedance varies with the tap step.
PhaseTapChangerTabular: Describes a tap changer with a table defining the relation between the tap step and the phase angle difference across the transformer.
PhotoVoltaicUnit: A photovoltaic device or an aggregation of such devices.
PostLineSensor: A sensor used mainly in overhead distribution networks as the source of both current and voltage measurements.
PotentialTransformer: Instrument transformer (also known as Voltage Transformer) used to measure electrical qualities of the circuit that is being protected and/or monitored.
PowerElectronicsConnection: A connection to the AC network for energy production or consumption that uses power electronics rather than rotating machines.
PowerElectronicsUnit: A generating unit or battery or aggregation that connects to the AC network using power electronics rather than rotating machines.
PowerElectronicsWindUnit: A wind generating unit that connects to the AC network with power electronics rather than rotating machines or an aggregation of such units.
PowerSystemResource: A power system resource (PSR) can be an item of equipment such as a switch, an equipment container containing many individual items of equipment such as a substation, or an organisational entity such as sub-control area.
PowerTransformer: An electrical device consisting of two or more coupled windings, with or without a magnetic core, for introducing mutual coupling between electric circuits.
PowerTransformerEnd: A PowerTransformerEnd is associated with each Terminal of a PowerTransformer.
ProtectedSwitch: A ProtectedSwitch is a switching device that can be operated by ProtectionEquipment.
RatioTapChanger: A tap changer that changes the voltage ratio impacting the voltage magnitude but not the phase angle across the transformer.
RatioTapChangerTable: Describes a curve for how the voltage magnitude and impedance varies with the tap step.
StaticVarCompensator: A facility for providing variable and controllable shunt reactive power.
StationSupply: Station supply with load derived from the station output.
SubGeographicalRegion: A subset of a geographical region of a power system network model.
SubLoadArea: The class is the second level in a hierarchical structure for grouping of loads for the purpose of load flow load scaling.
Substation: A collection of equipment for purposes other than generation or utilization, through which electric energy in bulk is passed for the purposes of switching or modifying its characteristics.
SurgeArrester: Shunt device, installed on the network, usually in the proximity of electrical equipment in order to protect the said equipment against transient voltage transients caused by lightning or switching activity.
Switch: A generic device designed to close, or open, or both, one or more electric circuits.