Q (V) - Apparent Power Versus Voltage - Delta RPI M50A_120 Installation And Operation Manual

8 Settings

8.17 Q (V) - Apparent power versus voltage

Overview
Values have been set based upon country standards. If you modify these values, you will lose certi-
fication. Therefore you should set this function only when requested by country regulations, authori-
ties or your grid operator.
With this function you can set the apparent power as a function of the grid voltage.
This function is available for medium voltage grids only.
(1) Behavior for Curve A
63%
V
2i
63%
184.0 V
Operating behavior for curve A
When the grid voltage increases to the lower voltage limit V1s, the inverter starts to feed-in inductive reactive
power. When you set the parameter T inductive, the inverter will wait for this period time for the grid voltage
falling back to a level below V1s before it starts feeding in inductive reactive power. When the grid voltage con-
tinues to increase, the inductive reactive power will be increased according to the ramp defined by the curve. If
the grid voltage exceeds the upper voltage limit V2s, the inductive active power remains at the level defined in
Qs limit.
When the grid voltage falls to the upper voltage limit V1i, the inverter starts to feed-in inductive reactive power.
When you set the parameter T delay, the inverter will wait for this period time for the grid voltage rising back
to a level above V1i before it starts feeding in inductive reactive power. When the grid voltage continues to fall,
the inductive reactive power will be increased according to the ramp defined by the curve. If the grid voltage
exceeds the upper voltage limit V2i, the inductive active power remains at the level defined in Qi limit.
Do not change this setting without prior
consultation with Delta Solar Support.
80 80
Q
s limit
V
1i
V V
1s 2s
Q
i limit
230.0 V 264.5 V
(2) Behavior for Curve B
63%
V
inductive cos φ
63%
184.0 V
Q
s limit
V V
2i 1i
V
1s
Q
i limit
230.0 V
Installation and Operation Manual for RPI M50A Installation and Operation Manual for RPI M50A
V
V
2s
264.5 V