SmartLogger1000
User Manual
8 Power Grid Scheduling
Issue 12 (2019-01-15)
Copyright © Huawei Technologies Co., Ltd.
267
Configure the characteristic curve under instructions from professionals to ensure that the
SUN2000 works properly.
The 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. The final value should
be in the form of Q/S.
Set
Reactive power control mode
to
Q-U hysteresis curve(CEI0-16)
.
Figure 8-15
Q-U hysteresis curve (CEI0-16)
When configuring the curve, ensure that the
U/Un(%)
value of a point is greater than the
U/Un(%)
value of the previous point. Otherwise, the
Invalid input
message will be displayed.
When configuring the curve, ensure that the values of
A
and
B
for
Q/S
are consistent and set in
sequence, and that the values of
C
and
D
are consistent and set in sequence. Otherwise, the
Invalid
input
message will be displayed.
Under a specific grid code, after you set
Percents of trigger frequency
, the characteristic curve
takes effect only when the actual output active power of the inverter is greater than the preset value.
8.3.8 Remote Scheduling
The NMS or independent power adjustment device sends scheduling commands over the
communications port that works with Modbus-TCP or IEC104, without the need of user
configuration or operation. The SmartLogger can automatically switch between scheduling
modes and send scheduling commands.
When
Reactive power control mode
is set to
Remote scheduling
, the SmartLogger receives
the scheduling commands from the upstream NMS, converts them into valid command data
identifiable to the inverters, and then sends the data to all the connected inverters. Based on
the principle of preference of remote scheduling, the SmartLogger sets
Reactive power
