Camille Bauer SINEAX CAM IEC 61850 Instructions D'installation page 24

MSQI -
Sequence and imbalance
This node provides data of the imbalance analysis of 3 or 4-wire systems with unbalanced load
Attribute Name Attr. Type
LNName
Data
Common Logical Node Information
Measured values
SeqA SEQ
SeqV SEQ
ImbA WYE
ImbNgA MV
ImbNgV MV
ImbPPV DEL
ImbV WYE
ImbZroA MV
ImbZroV MV
MaxImbA MV
MaxImbPPV MV
MaxImbV MV
Unbalanced 4-wire systems only
Unbalanced 3-wire systems only
Balanced 3-wire systems only
Shall be inherited from Logical-Node Class (see IEC 61850-7-2)
LN shall inherit all Mandatory Data from Common Logical Node Class
Absolute measured values of positive, negative and zero sequence current.
Absolute measured values of positive, negative and zero sequence voltage.
Deviation from the average phase current.
− I
ImbA.phsX =| I
| with Iave = (1/3) ×(I
x ave
Current Imbalance Negative Sequence Method. ImbNgA = I2 / I1
Voltage Imbalance Negative Sequence Method. ImbNgV = V2 / V1
Deviation from the average phase-to-phase voltage.
ImbPPV.phsXY = |V – PPV
XY
Deviation from the average phase-to-neutral voltage.
ImbV.phsX = |V – V | with Vave = (1/3) × (V
X ave
Current Imbalance Zero Sequence Method. ImbZroA = I0 / I1
Voltage Imbalance Zero Sequence Method. ImbZroV = V0 / V1
Maximum deviation from the average current.
Max(Idev_a,Idev_b,Idev_c)
Maximum deviation from the average phase-to-phase voltage.
MaxImbPPV = Max(PPVdev_a,PPVdev_b,PPVdev_c)
Maximum deviation from the average phase-to-neutral voltage.
MaxImbV = Max(Vdev_a,Vdev_b,Vdev_c)
Explanation
+ I + I )
A B C
| with PPV = (1/3) × (V
ave ave ab
+ V + V
an bn
24/25
+ V + V ).
bc ca
).
cn