Huawei SmartLogger1000 User Manual page 166

SmartLogger1000
User Manual
Characteristic Curves
If the remote control of the reactive power compensation is unavailable, the SmartLogger
provides the Q-U characteristic curve, cos(Phi)-P/Pn characteristic curve, or Q-U Hysteresis
curve(CEI0-16) for substitute. The power dispatching personnel specifies the characteristic
curve according to the requirements of the local power grid and grid-tied power system and
sends the signal to all the connected inverters in real time.
Set Reactive Power Control Mode to Q-U characteristic curve, as shown in
to cos(Phi)-P/Pn characteristic curve, as shown in
curve(CEI0-16), as shown in
Set the parameters of characteristic curves under instructions from professionals to ensure that
the inverters work properly.
Issue 04 (2013-12-15)

Set Start Time in the format of hh:mm:ss (in which hh means hour, mm means minute, ss means
second).

If no separate periods are required, users can set only one start time.
If a "√" is under Capacitive, the power factor is a negative value, indicating that the power grid

supplies reactive power to the PV power station. If no "√" is under Capacitive, the power factor is a
positive value, indicating that the PV power station supplies reactive power to the power grid.

Q-U characteristic curve control mode is to dynamically adjust the ratio of the output reactive power
to apparent power Q/S in accordance with the ratio of the actual grid voltage to the rated grid
voltage U/Un (%).
cos(Phi)-P/Pn characteristic curve control modes is to dynamically adjust the power factor cosψ in

accordance with the ratio of the actual inverter output power to the rated inverter power P/Pn (%).
 Q-U Hysteresis curve(CEI0-16) control mode is the Italian standard CEI0-16 version of the Q-U
characteristic curve. It dynamically adjusts the output reactive power of the inverter in accordance
with the ratio of the actual voltage to the rated voltage of the grid-tied point. And the final value
should be in the form of Q/Pn.
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Figure
Figure 7-82.
7 Web User Interface
Figure
7-81, or to Q-U Hysteresis
7-80, or
159