80 | 120
blue’Log X series
14.3.4
Intelligent Power Limit (IPL)
With the help of the Intelligent Power Limit (IPL) function, active power regulation
(closed control loop) can be enabled. As a result, cabling and transformer losses in PV
power plants can be taken into account in order to provide the maximum permitted
feed-in power at the grid connection point in accordance with the permitted stationary
control deviation.
If, for example, a permanent limitation of feed-in power to 0 % or 70 % of nominal
system power is specified, the IPL function can be used to increase the energy yield of
your PV system. The power reduction is carried out while taking into account on-site
energy consumption. If the feed-in power of your PV system is in the limitation range,
the specified percentage active power will automatically be increased by the share of
your on-site energy consumption.
The IPL function can only be guaranteed if the system's power flows are recorded. A
variety of combinations of measurement components are available to ensure correct
functionality of the IPL.
Use of a power quality analyzer at the grid connection point
Use of a feed-in and import meter at the grid connection point
Use of a consumption meter ahead of the loads
Use of a power quality analyzer / feed-in and import meter at the grid connection
point as well as a consumption meter ahead of the consumers
With help of a power quality analyzer, cabling and transformer
losses in PV systems can be taken into account.
When using S0 meters, meters with 1000 pulses/kWh or more are
suggested in order to achieve an adequate level of accuracy.
Optimum results with the IPL function can be achieved by
recording grid feed-in and sourcing as well as consumption.
