Q On Demand - Kaco blueplanet 92.0 TL3 US Manual

10 | Specifications
grid, the inverter will resume normal operation. With stage 1 active, the device has switched to zero current mode and
will recommence feed-in after only 100 ms. With stage 2 active, the device has switched off and the set reconnection con-
ditions shall apply.
10.6

Q on demand

DANGER
When deactivating the night shut-off ("Q on Demand" operation), a high DC voltage can con-
tinue to be present not only on the string combiner but also on the device, even though the string
combiner is switched off.
1. In case of maintenance, the device must also be deenergized on the AC-side.
2. We recommend attaching an appropriate hazard warning 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. The function is only available from the named firmware version [See section 1.1} Page 4].
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 66].
P [p.u.]
P
1,2
1
(1)
0,8
0,6
0,4
0,2
0
1 0,6 0,3
underexcited
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.
Page 100
above U
N
at 0,95 U
N
at 0,9 U
N P max
at 0,85 U
N
Q [P.u]
0,3 0,6 1
overexcited
KACO blueplanet 92.0 TL3 US KACO blueplanet 110 TL3 US KACO blueplanet 125 TL3 US
Manual
P [p.u.]
P
1,2
1
0,8
0,6
0,4
0,2
0
1 0,6 0,3 0,3
underexcited
above U
N
(2)
Q [P.u]
0,6 1
overexcited