PowerTransformer

InstanceSet

1

InstanceSet

Dataset containing the data objects.

beforeShCircuitHighestOperatingCurrent

0..1

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.

beforeShCircuitHighestOperatingVoltage

0..1

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.

beforeShortCircuitAnglePf

0..1

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.

highSideMinOperatingU

0..1

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.

isPartOfGeneratorUnit

0..1

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.

operationalValuesConsidered

0..1

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.

vectorGroup

0..1

string

Vector group of the transformer for protective relaying, e.g., Dyn1. For unbalanced transformers, this may not be simply determined from the constituent winding connections and phase angle displacements.

The vectorGroup string consists of the following components in the order listed: high voltage winding connection, mid voltage winding connection (for three winding transformers), phase displacement clock number from 0 to 11, low voltage winding connection phase displacement clock number from 0 to 11. The winding connections are D (delta), Y (wye), YN (wye with neutral), Z (zigzag), ZN (zigzag with neutral), A (auto transformer). Upper case means the high voltage, lower case mid or low. The high voltage winding always has clock position 0 and is not included in the vector group string. Some examples: YNy0 (two winding wye to wye with no phase displacement), YNd11 (two winding wye to delta with 330 degrees phase displacement), YNyn0d5 (three winding transformer wye with neutral high voltage, wye with neutral mid voltage and no phase displacement, delta low voltage with 150 degrees displacement).

Phase displacement is defined as the angular difference between the phasors representing the voltages between the neutral point (real or imaginary) and the corresponding terminals of two windings, a positive sequence voltage system being applied to the high-voltage terminals, following each other in alphabetical sequence if they are lettered, or in numerical sequence if they are numbered: the phasors are assumed to rotate in a counter-clockwise sense.

PowerTransformerEnd

0..*

PowerTransformerEnd

The ends of this power transformer.

TransformerTanks

0..*

TransformerTank

All transformers that belong to this bank.

AssetDatasheet

0..1

AssetInfo

Datasheet information for this power system resource.

BaseVoltage

0..1

BaseVoltage

Base voltage of this conducting equipment. Use only when there is no voltage level container used and only one base voltage applies. For example, not used for transformers.

EquipmentContainer

0..1

EquipmentContainer

Container of this equipment.

GroundingAction

0..1

GroundAction

Action involving grounding operation on this conducting equipment.

JumpingAction

0..1

JumperAction

Jumper action involving jumping operation on this conducting equipment.

Location

0..1

Location

Location of this power system resource.

Outage

0..1

Outage

The outage that is isolated by the outage isolation equipment.

PSRType

0..1

PSRType

Custom classification for this power system resource.

PropertiesCIMDataObject

0..1

ChangeSetMember

The single CIM data object in the appropriate dataset context.

aggregate

0..1

boolean

The aggregate flag provides an alternative way of representing an aggregated (equivalent) element. It is applicable in cases when the dedicated classes for equivalent equipment do not have all of the attributes necessary to represent the required level of detail. In case the flag is set to “true” the single instance of equipment represents multiple pieces of equipment that have been modelled together as an aggregate equivalent obtained by a network reduction procedure. Examples would be power transformers or synchronous machines operating in parallel modelled as a single aggregate power transformer or aggregate synchronous machine. The attribute is not used for EquivalentBranch, EquivalentShunt and EquivalentInjection.

aliasName

0..1

string

The aliasName is free text human readable name of the object alternative to IdentifiedObject.name. It may be non unique and may not correlate to a naming hierarchy. The attribute aliasName is retained because of backwards compatibility between CIM relases. It is however recommended to replace aliasName with the Name class as aliasName is planned for retirement at a future time.

description

0..1

string

The description is a free human readable text describing or naming the object. It may be non unique and may not correlate to a naming hierarchy.

inService

0..1

boolean

Specifies the availability of the equipment. True means the equipment is available for topology processing, which determines if the equipment is energized or not. False means that the equipment is treated by network applications as if it is not in the model.

mRID

0..1

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.

name

0..1

string

The name is any free human readable and possibly non unique text naming the object.

networkAnalysisEnabled

0..1

boolean

The equipment is enabled to participate in network analysis. If unspecified, the value is assumed to be true.

normallyInService

0..1

boolean

Specifies the availability of the equipment under normal operating conditions. True means the equipment is available for topology processing, which determines if the equipment is energized or not. False means that the equipment is treated by network applications as if it is not in the model.

AdditionalEquipmentContainer

0..*

EquipmentContainer

Additional equipment container beyond the primary equipment container. The equipment is contained in another equipment container, but also grouped with this equipment container.

Assets

0..*

Asset

All assets represented by this power system resource. For example, multiple conductor assets are electrically modelled as a single AC line segment.

Clearances

0..*

ClearanceDocument

All clearances applicable to this power system resource.

ConfigurationEvent

0..*

ConfigurationEvent

All configuration events created for this Power System resource.

ContingencyEquipment

0..*

ContingencyEquipment

The contingency equipments in which this equipment participates.

Controls

0..*

Control

The controller outputs used to actually govern a regulating device, e.g. the magnetization of a synchronous machine or capacitor bank breaker actuator.

DiagramObjects

0..*

DiagramObject

The diagram objects that are associated with the domain object.

EqiupmentLimitSeriesComponent

0..*

EquipmentLimitSeriesComponent

Equipment limit series calculation component to which this equipment contributes.

EquipmentUnavailabilitySchedule

0..*

EquipmentUnavailabilitySchedule

n/a

Faults

0..*

Fault

All faults on this equipment.

GenericAction

0..*

GenericAction

The generic action that is performed on the power system resource

LimitDependencyModel

0..*

LimitDependency

Limit dependencymodels organized under this equipment as a means for organizing the model in a tree view.

Measurements

0..*

Measurement

The measurements associated with this power system resource.

Names

0..*

Name

All names of this identified object.

OperatingShare

0..*

OperatingShare

The operating shares of this power system resource.

OperationalLimitSet

0..*

OperationalLimitSet

The operational limit sets associated with this equipment.

OperationalRestrictions

0..*

OperationalRestriction

All operational restrictions for this equipment.

OperationalTags

0..*

OperationalTag

All operational tags placed on this power system resource.

Outages

0..*

Outage

All outages in which this equipment is involved.

PSREvents

0..*

PSREvent

All events associated with this power system resource.

PinEquipment

0..*

PinEquipment

n/a

ProtectionEquipments

0..*

ProtectionEquipment

Protection equipment used to protect specific conducting equipment.

ProtectiveActionAdjustment

0..*

ProtectiveActionAdjustment

The operating condition to the Conducting Equipment is changed when protective action adjustment is activated. For ShuntCompensator or other conducting equipment that operates on discrete values (integer), the values given in float will be rounded.

ProtectiveActionEquipment

0..*

ProtectiveActionEquipment

Protective action is controlling equipment. This can be direct signals from the control center, or emulation of action done by protection equipment.

ReportingGroup

0..*

ReportingGroup

Reporting groups to which this power system resource belongs.

SvStatus

0..*

SvStatus

The status state variable associated with this conducting equipment.

TargetingCIMDataObject

0..*

ChangeSetMember

Data objects registered.

Terminals

0..*

Terminal

Conducting equipment have terminals that may be connected to other conducting equipment terminals via connectivity nodes or topological nodes.

UsagePoints

0..*

UsagePoint

All usage points connected to the electrical grid through this equipment.

VerificationAction

0..*

VerificationAction

The verification action that is performed on the power system resource

WeatherStation

0..*

WeatherStation

n/a