Manual Energy Storage Inverter ESI-S
Operating instructions 163
System is running
Stop request
Stop IGBT’s
Open the DC
contactor
Controller
running,
DC capacitors
charging, wating
for a start request
Open the AC
contactor
Figure 76: inverter operation sequence when no fault is present
The DC bus incorporates discharge resistors that can discharge the DC bus in 25 minutes
once the supply is open.
9.3 Modifying the user requirements
9.3.1 Active and reactive power targets
Power targets (P and Q) can set soon as the system is connected to the battery. The sign
convention is described in the table below. Since the inverter is defined in kVA, both
active and reactive powers can be set together, the PQ diagram is shown in
The variation (3 circles) is explained by the tolerance on the network voltage.
Active power
Charge
Negative target
Discharge
Positive target
Reactive power
Inductive
negative
Capacitive
positive
