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PowerTransformer

An electrical device consisting of two or more coupled windings, with or without a magnetic core, for introducing mutual coupling between electric circuits. Transformers can be used to control voltage and phase shift (active power flow). A power transformer may be composed of separate transformer tanks that need not be identical. A power transformer can be modelled with or without tanks and is intended for use in both balanced and unbalanced representations. A power transformer typically has two terminals, but may have one (grounding), three or more terminals. The inherited association ConductingEquipment.BaseVoltage should not be used. The association from TransformerEnd to BaseVoltage should be used instead.

URI: cim:PowerTransformer
Type: Class

%%{init: {'theme':'base','themeVariables': {'lineColor': '#FF0000'}}}%%
classDiagram
    class PowerTransformer
    click PowerTransformer href "/Models/Profiles/ShortCircuit/ConcreteClasses/PowerTransformer/"
    style PowerTransformer fill:#102820,stroke:#333,stroke-width:2px,rx:10,ry:10,color:white

        ConductingEquipment <|-- PowerTransformer : inherits
            click ConductingEquipment href "/Models/Profiles/ShortCircuit/AbstractClasses/ConductingEquipment/"
            style ConductingEquipment fill:#8F9779,stroke:#333,stroke-width:2px,rx:10,ry:10,color:white

        Equipment <|-- ConductingEquipment : inherits
            click Equipment href "/Models/Profiles/ShortCircuit/AbstractClasses/Equipment/"
            style Equipment fill:#8F9779,stroke:#333,stroke-width:2px,rx:10,ry:10,color:white

        PowerSystemResource <|-- Equipment : inherits
            click PowerSystemResource href "/Models/Profiles/ShortCircuit/AbstractClasses/PowerSystemResource/"
            style PowerSystemResource fill:#8F9779,stroke:#333,stroke-width:2px,rx:10,ry:10,color:white

        IdentifiedObject <|-- PowerSystemResource : inherits
            click IdentifiedObject href "/Models/Profiles/ShortCircuit/AbstractClasses/IdentifiedObject/"
            style IdentifiedObject fill:#8F9779,stroke:#333,stroke-width:2px,rx:10,ry:10,color:white



        PowerTransformer : PowerTransformer.beforeShCircuitHighestOperatingCurrent
        PowerTransformer : PowerTransformer.beforeShCircuitHighestOperatingVoltage
        PowerTransformer : PowerTransformer.beforeShortCircuitAnglePf
        PowerTransformer : PowerTransformer.highSideMinOperatingU
        PowerTransformer : PowerTransformer.isPartOfGeneratorUnit
        PowerTransformer : PowerTransformer.operationalValuesConsidered
        IdentifiedObject : IdentifiedObject.mRID

Inheritance

Attributes

Name URI Cardinality and Range Description Inheritance
beforeShCircuitHighestOperatingCurrent cim:PowerTransformer.beforeShCircuitHighestOperatingCurrent No cardinality available CurrentFlow The highest operating current (Ib in IEC 60909-0) before short circuit (depends on network configuration and relevant reliability philosophy). It is used for calculation of the impedance correction factor KT defined in IEC 60909-0. direct
beforeShCircuitHighestOperatingVoltage cim:PowerTransformer.beforeShCircuitHighestOperatingVoltage No cardinality available Voltage The highest operating voltage (Ub in IEC 60909-0) before short circuit. It is used for calculation of the impedance correction factor KT defined in IEC 60909-0. This is worst case voltage on the low side winding (3.7.1 of IEC 60909:2001). Used to define operating conditions. direct
beforeShortCircuitAnglePf cim:PowerTransformer.beforeShortCircuitAnglePf No cardinality available AngleDegrees The angle of power factor before short circuit (phib in IEC 60909-0). It is used for calculation of the impedance correction factor KT defined in IEC 60909-0. This is the worst case power factor. Used to define operating conditions. direct
highSideMinOperatingU cim:PowerTransformer.highSideMinOperatingU No cardinality available Voltage The minimum operating voltage (uQmin in IEC 60909-0) at the high voltage side (Q side) of the unit transformer of the power station unit. A value well established from long-term operating experience of the system. It is used for calculation of the impedance correction factor KG defined in IEC 60909-0. direct
isPartOfGeneratorUnit cim:PowerTransformer.isPartOfGeneratorUnit No cardinality available boolean Indicates whether the machine is part of a power station unit. Used for short circuit data exchange according to IEC 60909. It has an impact on how the correction factors are calculated for transformers, since the transformer is not necessarily part of a synchronous machine and generating unit. It is not always possible to derive this information from the model. This is why the attribute is necessary. direct
operationalValuesConsidered cim:PowerTransformer.operationalValuesConsidered No cardinality available boolean It is used to define if the data (other attributes related to short circuit data exchange) defines long term operational conditions or not. Used for short circuit data exchange according to IEC 60909. direct
mRID cim:IdentifiedObject.mRID No cardinality available string Master resource identifier issued by a model authority. The mRID is unique within an exchange context. Global uniqueness is easily achieved by using a UUID, as specified in RFC 4122, for the mRID. The use of UUID is strongly recommended.
For CIMXML data files in RDF syntax conforming to IEC 61970-552, the mRID is mapped to rdf:ID or rdf:about attributes that identify CIM object elements. IdentifiedObject

Schema Source

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