Fixed Reactive Power; Reactive Power/Voltage Characteristic Q(U); Fault Ride Through (Frt) - Delta PhotoVoltaic RPI-C500 Manual

I
NSTALLATION

5.10.2.3. Fixed Reactive Power

Once user enables this method, inverter will deliver reactive power (ie. Q) according to the
fixed reactive power setting. The setting range is from Cap 60% to Ind 60%.

5.10.2.4. Reactive Power/Voltage Characteristic Q(U)

After selecting "Q(U) control", User can set Q vs. Grid voltage operation curves as below.

5.10.3. Fault Ride Through (FRT)

According to BDEW:
2.5.1.2 Dynamic network support
Dynamic network support means voltage control in the event of voltage drops within the high
and extra-high voltage network with a view to avoiding unintentional disconnections of large
feed-in power, and thus network collapse. In the light of the strong increase in the number of
generating plants to be connected to the medium-voltage network, the integration of these
plants into the dynamic network support scheme is becoming ever more important.
Consequently, these generating plants must generally participate in dynamic network support
even if this is not required by the network operator at the time of the plant's connection to the
network. That means that generating plants must be able in technical terms

not to disconnect from the network in the event of network faults,

to support the network voltage during a network fault by feeding a reactive current into
the network,

not to extract from the medium-voltage network after fault clearance more inductive
reactive power than prior to the occurrence of the fault.
These requirements apply to all types of short circuits (i.e. to single-phase, two-phase and
three-phase short circuits).
Just like in the Transmission Code 2007 7, a distinction is made in these guidelines between
type-1 and type-2 generating plants with regard to their behaviour in the event of network
disturbances. A type-1 generating unit exists if a synchronous generator is directly (only
through the generator transformer) connected to the network. All other plants are type-2
generating units.
The following conditions shall apply to type-2 generating plants, taking the Transmission
Code 2007, Section 3.3.13.5, into account:

Generating units must not disconnect from the network in the event of voltage drops to 0
% Uc of a duration of ≤ 150 ms.
I G
NSTALLATION UIDE
A /R
CTIVE EACTIVE
Figure 5-25. Q(U) characteristic
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P C A F
OWER ONTROL ND
R T
AULT IDE HROUGH