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Download Specialists in distribution grids with photovoltaic systems
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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