Sonel MPI-540 - Energy Loss Calculator; Functional Description

MPI-540 – USER MANUAL
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4.9 Energy loss calculator
4.9.1 Functional Description
In this mode, you can estimate the loss of active power and associated costs due to poor power sup-
ply quality. The loss analysis screen is shown in Fig. 4.28. Analysis can be performed in terms of the
desired time.
Fig. 4.28 Energy loss analysis
Parameters to analyse
P
opt
power loss due to wire resistance (as-
suming the absence of higher harmonics,
unbalance and reactive power)
C
opt
cost related to P
opt
losses
P
dis
losses due to higher harmonics
C
dis
cost related to P
dis
losses
P
unb
power losses due to network unbalance
C
unb
cost related to P
unb
losses
P
rea
power loss due to the presence of reac-
tive power
C
rea
cost related to P
rea
losses
C
pf
cost related to a low power factor (large
share of reactive power)
P
tot
total losses (the sum of the above)
C
tot
cost related to P
rea
losses
P
sav
losses which can be reduced by improv-
ing the quality parameters (e.g. compen-
sation of harmonics, elimination of un-
balance), arising from the relationship:
P
sav
= P
tot
- P
opt
C
sav
cost related to P
sav
losses