kago 1001950, Manual

Page: 90 / 113

10.6 Q on Demand
DANGER
When deactivating the
Night Shutdown
(„Q on Demand“-Operation) a high DC voltage may still
be present both at the string combiner and at the device despite the string combiner being
switched off.
1. In case of maintenance, the device must also be disconnected from the power supply on the AC side.
2. We recommend affixing a matching danger notice on the String-Combiner.
The "Q on Demand" function can also provide reactive power Q outside the PV feed-in times (e.g. at night) to stabilize the
grid.
Important requirements:
– "Night shutdown" function deactivated in the menu
– Device is connected on the AC side
– Device was in feed-in operation.
First priority is given to the specifications that the inverter receives from the grid operator via the park controller via Eth-
ernet or RS485. Second priority is given to the parameters for Q constant and Q(U) stored in the inverter.
In the event of AC disconnection during "Q on Demand" operation outside of feed-in operation, renewed use of the "Q on
Demand" function is only possible after proper feed-in operation (with sufficient DC supply). The existing deactivated
"night shutdown" also remains active.
The following illustrations show normal operation in the P-Q operating range, during the day (feed-in operation) (1) and
„Q on Demand“ operation at night (2).
Only reactive power is generated at night. Inevitably, some active power is required for the internal power supply to
maintain the preset reactive power functions in "Q on Demand" mode (see pos. 2 in the negative P range).
Setting of the reactive power mode: See table : Configuration via web user interface [
} Page 59].
1
P [p.u.]
Q [P.u]
0,6
0,4
0,2
0
1
0,8
1,2
0,6 0,6 1 0,3
above U
N
at 0,95 U
N
at 0,9 U
N
at 0,85 U
N
underexcited overexcited
P
(1)
0,3
P max
P [p.u.]
Q [P.u]
0,6
0,4
0,2
0
1
0,8
1,2
above U
N
underexcited overexcited
P
1 0,6 0,6 1 0,3 0,3
(2)
Key
(1) Normal operation: Active power and reactive power provision at different voltages.
(2) „Q on Demand“ operation : Reactive power provision at nominal grid voltage outside of feed-in operation.
10 | Specifications Manual
KACO blueplanet 100 TL3 Page 90
EN