The Electronic Load

The Electronic Load
Application Notes ZS PL H&H
ZSLC
Water-cooled
ZSLV
Low Voltage
PMLI
Multi-channel
ZSAC
AC
Accessories
High „Delta_P_min“
The diagram shows voltage
(top), current (centre) and
power (bottom).
The electronic load adjusts the
voltage up or down constantly
until the output deviates from
the stated "Delta_P_min" value.
The voltage then changes
direction until the same
deviation is present in the other
Limits of the MPP Mode
If "Delta_P_min" is set too high
for a panel, the panel will not be
able to deliver that output and
the MPP control will alternate
constantly between open circuit
and short circuit.
This can also occur if the panel
is shaded or only minimal
radiation is present.
direction.
At higher "Delta_P_min" values
the triangular voltage trajectory
is clearly visible.
The top point of the output
curve represents the MPP value.
Lower „Delta_P_min“
If the "Delta_P_min" value is
reduced (here by a factor of 10
in relation to the diagram
before), the amplitude of the
triangular voltage reduces and
the output curve also becomes
flatter.
The electronic load operates
very close to the MPP value.
Smallest „Delta_P_min“
If "Delta_P_min" drops further
the control behaviour will
change the voltage very little
and the output will remain
constant at the MPP point.
MPP mode cannot be maintained
if the electronic load reaches its
power limits (max. voltage,
max. current of respective range
or max. power).
GTC
NL
Source-Sink
Software
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