Manual Energy Storage Inverter ESI-S
The ESI-Manager user interface 95
Table 40: Available inverter modes
Highest priority
level
Lowest priority
level
Mode 1
Active power set
point
filtering
to
curve
Maximum
filtering
Reactive
compensation
Mode 2
Active power set
point
filtering to curve
Reactive
compensation
Maximum filtering
Mode 3
Active power set
point
filtering to curve
Reactive
compensation
-
In Mode 1, the inverter will first generate the active power target. Then it will filter to the
pre-programmed curve. Once the requirements are fulfilled, the remaining resources will
be allocated to reducing the selected harmonics as close as possible to zero. If further
resources are then available, reactive power compensation and load balancing will be
performed as required.
In Mode 2, the second priority after active power set point and filtering to the curve is
reactive power compensation and load balancing. Maximum filtering comes in third
place and will be done if both the curve specification and the reactive power
requirements including balancing are fulfilled.
In Mode 3, the inverter will first ensure that active power set point and the harmonic
curve specification is fulfilled. If then there are still resources available, the inverter will
do reactive power compensation and load balancing if requested by the user.
illustrates the principle of filtering to curve for one particular harmonic order.
The flexibility of the ESI control is such that a specific curve level may be defined for each
selected harmonic.
Filtered current
Remaining
supply
current
Before filtering
After filtering
Permitted
residual level
into the supply
=
curve setting
Supply
current for
harmonic
order n
Figure 63: Invertering to curve for harmonic order n
The default inverter mode is Mode 3.
