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000820AG
7 - Operation
G
rid support functions
The inverter is equipped with advanced grid support functionality that is
useful to support reactive loads and also assist in reliable operation of
the utility grid in the presence of a large number of distributed energy
generation sources.
The internal Webserver (see “Description of the internal Webserver”
paragraph) can be used to adjust grid parameters.
A Wi-Fi connection to the inverter is required to modify settings using the
internal Webserver.
1.Voltage ride-through
This inverter provides parameters to respond to underfrequency and
overfrequency events. If frequency excursions occur, the inverter is
designed to continue operating normally for a specified delay. Beyond
this programmed delay, the inverter disconnects from the grid in the
event of an abnormal voltage condition.
2.Frequency ride-through
This inverter provides parameters to respond to underfrequency and
overfrequency events. If frequency excursions occur, the inverter is
designed to continue operating normally for a specified delay. Beyond
this programmed delay, the inverter disconnects from the grid in the
event of an abnormal voltage condition.
3. Reactive power control
The inverter provides several modes of operation for reactive power
control and are described below:
- Disable: This is the default setting. Under this setting, the inverter
exports with a power factor of 1.0.
- Fixed power factor control (Cosɸ set): In this mode, the operator can set
the output power factor to a fixed value. When enabled, a new value will
be set in the inverter.
- Q Fixed (Q Set): Sets the reactive power to a fixed value. When enabled,
a new value will be set in the inverter.
- Power factor as function of output power (Watt/Cosφ Settings: Cosφ(P)):
In this mode, the inverter reduces the power factor (cos-phi) as a
function of the output power at a given operating point. The 4 points of
the default curve, where you can set the % of Pmax values and related
cos-phi, can be modified using the internal Webserver. When enabled,
the curve will be set in the inverter.
- Dynamic Volt/VAR control (Volt/VAr Settings: Q(V)): Under this mode,
the level of reactive power exported by the inverter is a function of the
operating grid voltage, also known as a Volt/VAR curve. The 4 points of
the default curve, where you can set the % of Vnom values and related
% of Smax, can be modified using the internal Webserver. When
enabled, the curve will be set in the inverter.
