104 | 120
blue’Log X series
14.4.15
Q(cos
φ
(U)) procedure
In this procedure a cos
φ
value is derived from the target value and is converted into
the reactive power Q as control value to allow use of the generally greater inverter
setting range with reactive power(Q) values. As a result, the inverters can be regulated
within a greater range.
By changing the reactive power, it is possible to influence the voltage at the grid
connection point by recording the voltage U at the grid connection point by the
selected measuring device and transferring the measurements to the data logger. This
assigns the displacement factor to the relevant power, for example on the basis of a
two-point characteristic curve, and converts it into a reactive power(Q) control value
using the active power P additionally recorded by the selected measuring device at the
grid connection point.
This procedure is configured in a similar manner to the cos
ϕ
(U) procedure (cf. Section
This procedure requires a power quality analyzer that has been connected
to the data logger and configured.
