Kaco blueplanet 125 TL3 User Manual

Country-
spec.
Settings
Men
u
leve
l
Display/
Setting
Action in this menu/meaning
Over-excited | under-
excited
Reactive power mode Under-excited relates to inductive load, over-ex-
cited relates to capacitive load.
10.2 Regulating active power
Methods for regulating the active power of feed-in inverters may be necessary for local management
of load flows, for voltage stability in the distribution network and for ensuring the stability of the inter-
connected grid.
The communication functions P limit and P set are available for managing load flows in a plant. If
necessary, this can be used to reduce the feed of the inverter.
If voltage surges in the upstream distribution network cannot be compensated sufficiently by the ab-
sorption of reactive power, it may be necessary to adjust the active power. In this case, P(U) control is
available to make optimum use of the absorption capacity of the upstream grid.
Feed-in inverters must participate in frequency maintenance in the interconnected grid. If the grid fre-
quency leaves the normal tolerance band (e.g. ±200 mHz), a critical grid condition exists. Overfre-
quency is a generation surplus, underfrequency is a generation shortage. With overfrequency, photo-
voltaic systems and electricity storage systems must reduce their effective feed-in power relative to the
frequency increase. The function P(f) is available for this purpose. .
However, depending on the selected country setting, the availability or adjustability of the functions
may be limited. This is particularly the case if the applicable grid connection directive requires this re-
strictiont.
Dynamics / accuracy
In all of the control methods described below the specified target value at the inverter’s connection ter-
minals is adjusted using a stationary deviation of the reactive power of maximum 2%
N
SN.
The transient response of the control methods is determined by a PT-1 filter. In this case, the settling
time corresponds to 5 Tau, or in other words, achieving approx. 99% of the final value for a PT-1 filter.
Subject to the control method selected, there are also other parameters that determine dynamic be-
haviour.
Methods for active power regulation
Methods for regulating the active power of feed-in inverters may be necessary for local management
of load flows, for voltage stability in the distribution network and for ensuring the stability of the inter-
connected grid.
The device makes use of the following functions in order to regulate the active power. These are de-
scribed in the following section:
– P target value (MPPT/communication) Active power limitation [See section10.2.1}Page80]
– P limit (communication) Active power limitation [See section10.2.1}Page80]
– P(U) (characteristic curve) Voltage-dependent power reduction P(U) [See sec-
tion10.2.2}Page82]
– P(f) (characteristic curve) P(f) [See section10.2.3}Page84]
10.2.1 Active power limitation
The function P set is intrinsically integrated in PV inverters in the MPP-tracking of the inverter. The P
set value is constantly recalculated based on the MPP tracking algorithm.
P limit
The function "P limit" is available limiting the maximum infeed power. If necessary, this can be used to
reduce the in-feed of an inverter e.g. for congestion management of the distribution system operator.
P limit is available via MODBUS/SunSpec inverter model 123 WMaxLimPct and RS485 communica-
tion only. For detailed information on the communication protocol please refer to the download section
at www.kaco-newenergy.de subsection “Software”.
10 | Specifications Manual
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 105 TL3 KACO blueplanet 110 TL3
KACO blueplanet 125 TL3 KACO blueplanet 137 TL3 KACO blueplanet 150 TL3 KACO blueplanet 155 TL3
KACO blueplanet 165 TL3
Page 80
EN-US

Kaco blueplanet 125 TL3 Specifications

General

Brand	Kaco
Model	blueplanet 125 TL3
Category	Inverter
Language	English