Download Specialists in distribution grids with photovoltaic systems

Specialists in
distribution grids with
photovoltaic systems
Voltage without MDT
+10%
Voltage with MDT
Un
-10%
PV
PV
PV
PV
MDT
Stepless Self-regulating Magnetic Distribution Transformer
MDT
Magnetic Stepless Self-regulating Distribution Transformer - MDT
MDT
PATENTED PROVEN TECHNOLOGY:
Controlled inductors with orthogonal
magnetization – extremely robust and
maintenance free technology
Daytime power profile
RAPID CHANGES: Graph above shows a typical day-time
feed-in power profile from PhotoVoltaic systems.
without stabilizer
Voltage:
with stabilizer
6:00 am
9:00
12:00
15:00
18:00
Regarding the German Energiewende, there is a strong demand for new
solutions to achieve more flexible and higher performing grids. The Magnetic
Stepless Self-regulating Distribution Transformer (MDT) replace the existing
sub-station transformers to counter the problems of voltage rise on LV
networks which include power from Photo Voltaic or other distributed
generation sources. The patented MCI “Magtech Controllable Inductance”
technology used in the magnetic circuits modulates the voltage level as a
function of the varying power flow to reduce the “downstream” voltage.
Function of voltage reduction is preset in factory, and, once operating, the
units need no further adjustment. The exemplary reliability and long life (40
yrs) of the system is the same as a normal transformer. The system has high
efficiency in operation, and when no regulation is required, it automatically
changes to by-pass mode. The rapid reaction time of the system ensures
good supply quality in all power flow conditions.
Accommodating the reverse power flows due to Photo-Voltaic and other
distributed energy sources embedded in an electricity distribution network is
an emerging problem requiring new solutions. Magtech has employed their
patented variable inductance technology, proven over many years of use in
hundreds of Voltage Boosting installations, in the conception of a
revolutionary Self-Regulating Distribution Transformer for Photovoltaic
which has no parts in movement during operation, and automatically takes
itself out of the circuit when not needed, so as to give maximum efficiency.
The ease of installation, long life and almost zero maintenance of the
MDT makes it a low cost and high efficient solution to the problem of voltage
rise due to reverse power flow. The MDT can be quickly installed in standard
compact station housings as a permanent solution to the problems caused
by embedded generation.
CONTINUOUS STEPLESS STABILIZATION: MDT with
continuous stepless stabilization gives higher power
capacity, reduced rapid voltage changes and better
customer voltage quality ref. EN50160
FUNCTION
– Doubling capacity on existing grid cables
– Continuous stepless regulation compensating
for sudden changes of photovoltaic power
– Intelligent voltage reduction (0 to - 7%)
– Magnetic control, robust, good power quality
– Reduced rapid voltage changes with
continuous regulation
– Bypass if no photovoltaic feedback, no
acoustic noise at night time, low noise during
operation
– Bypass if fault, never power interruption,
failsafe
QUALITY
– No moving parts in power control module
– Long lifetime - like standard transformers
– Technology delivered to grid companies for 10
years
– No maintenance
– High short circuit capacity
–
–
–
–
High surge sustainability and overload
capacity - only copper, iron and insulation
material in power circuit
Few additional losses
High power factor
Class II (4 kV) isolating level for logic
module
FLEXIBLE AND EASY
– One regulated and one unregulated output
– Adapted to compact station housing
– Easy commissioning, no adjustments
necessary
– Self-regulating, no communication needed
– Power unit maintenance-free
– Available in different ratings
– Pluggable logic module constructed for
easy replacement after 15-20 years
– Direct technical support
– Constructed by Magtech in Norway
– Produced by Schneider Electric
TWO SEPARATE LOW VOLTAGE OUTPUTS (OPTIONAL):
• Normal 400 V output for standard customers
• Regulated 400 V for lines with PhotoVoltaic
Type of cooling
Max. ambient
temperature
Installation height
High-voltage
Taps on HV side:
Insulation level
Load regulation range
40 °C
max. 1.000 m
50 Hz
20.000 V
±2.5 %; ±5 % (switchable when deenergized)
LI 125 AC 50
415 V
0…-7 %
Insulation level
0…-6 %
LI – AC 3
Vector group
No-load losses (A0)
Load losses (Bk),
normal output
Load losses (Bk),
regulated output
Total loss tolerance
630 kVA
ONAN
Low-voltage
Dyn5
0.63 kW
0.85 kW
4.470 kW
5.400 kW
4.470 … 5.890 kW 5.400 … 8.200 kW
10 %
4.4 % ±10 %
3,9 % ±10 %
5.2 % ±10 %
4,16 % ±10 %
Length (A) x width (B) 1.312 x 855 x 1.750 1.450 x 950 x 1.850
x height (C)
mm
mm
Total weight/oil
weight
Dynamic
Regulated 400 V
400 kVA
Rated frequency
Impedance voltage,
unregulated output
Impedance voltage,
regulated output
20 kV
Normal 400 V
Technical data
Adjustable ramp
function
2.554 kg/644 kg
3.900 kg/760 kg
300 ms
300 ms
preadjusted 1 min preadjusted 1 min
Note! Technical data are preliminary. Magtech reserves the right to
make changes without notice
Magtech AS
Vålerveien 159, NO–1599 Moss, Norway, + 47 69 27 92 00
www.magtech.no, [email protected]
03.06.2013