A UUID as defined by IEC/ISO 9348-8.

This is a root class to provide common identification for all classes.

Defines a system base voltage which is referenced. This may be different than the rated voltage.

The parts of the AC power system that are designed to carry current or that are conductively connected through terminals.

Connectivity nodes are points where terminals of AC conducting equipment are connected together with zero impedance.

A multi-purpose curve or functional relationship between an independent variable (X-axis) and dependent (Y-axis) variables.

The parts of a power system that are physical devices, electronic or mechanical.

This is a root class tothat provideprovides common identification for all classes needing identification and naming attributes.

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. Power system resources can have measurements associated.

An AC electrical connection point to a piece of conducting equipment. Terminals are connected at physical connection points called connectivity nodes.

Describes the tap model for an asymmetrical phase shifting transformer in which the difference voltage vector adds to the in-phase winding. The out-of-phase winding is the transformer end where the tap changer is located. The angle between the in-phase and out-of-phase windings is named the winding connection angle. The phase shift depends on both the difference voltage magnitude and the winding connection angle. The winding connection angle can be changed for different operating conditions while energized. The following options are supported: <ol> <li>Modelling of tap changer using ConnectionAngleTapChanger without ConnectionAngleTapChangerTable. Equations for asymmetrical transformer defined in IEC 61970-301 are used. The supported winding connection angle range is defined by the maximum winding connection angle and the minimum winding connection angle. The connection angle step size is used to define the allowed winding connection angles for the tap changer.</li> <li>Modelling of tap changer using ConnectionAngleTapChanger with ConnectionAngleTapChangerTable. There shall be different tables that relate to different winding connection angles that are supported by the tap changer. There is no need to provide information on winding connection angle range and connection angle step size as the allowed winding connection angles are defined by the table. The usage of the table is recommended in cases where the equations for asymmetrical transformer defined in IEC 61970-301 cannot fully describe the tap changer or in cases where it is exchange the data for different tap steps in an explicit way as a table.</li> </ol>

Describes a tabular curve for how the connection angle varies with the tap step. This table is used when its winding connection angle matches the operating angle of the tap changer. There must be an instance of this table for each winding connection angle that can be used.

Describes a curve for how the power transformer end impedance varies with the tap step.

Describes each tap step in the impedance tap changer tabular curve.

Describes a tap changer with a table defining the relation between the tap step and the impedance difference across the windings of a three winding transformer.