Special Purpose Transformers - · PDF fileSpecial Purpose Transformers ... • Total Power 400 MW • 111 pcs. ... • Zincflake coating system with 210 µm layer thickness

Unrestricted © Siemens AG 2013 All rights reserved. siemens.at/future-of-energy

Special Purpose Transformers Johann Griebichler, Marketing & Sales Distribution Transformers, Factory Weiz - Austria

Unrestricted © Siemens AG 2013 All rights reserved.

2013-06-20Page 2 Johann Griebichler / E T TR LPT STW DT S

Agenda

• Location Siemens AG Österreich, Factory Weiz

• Renewable Energy – Transformer for Wind Turbines

• Energy Distribution – Generator Step Up Transformer

• Industrial – Transformers for Drive Applications in General

• Industrial – Transformer for 24-pulse Drive Application



Siemens AG Österreich, Transformers Weiz

Since 1892Employees 1.254Area 54.300m²

Plant Weiz



Products factory Weiz

Experience since more than 120 years in

• Power TransformersGenerator Step Up Transformers 1ph and 3phSubstation Transformers (Multiwinding- and Autotransformers up to 1.300 MVA / 765 kV

• Phase Shifting Transformers 1ph and 3phSingle- and Dualtank, symmetric and asymmetric Phase Angle up to 1.200 MVA / 765 kV

• Reactors 1ph up to 150 MVAr / 765 kVAdjustable Shunt Reactors and Seriesreactors 3ph up to 250 MVAr / 765 kV

• Distribution TransformersStandard Distribution Transformers 1ph and 3phSpecial Applications (Renewable Energy, Industry etc.) up to 12,5 MVA / 72,5 kV



Renewable Energy – Transformers for Wind TurbinesCustomer Siemens Wind Power / Dong Energy

Windfarm Anholt

Located in Denmark inside the area Kattegat between city Grenaa and island Anholt. On the 19th of May 2013, the last wind turbine was errected, full operation is planned for 4th of September 2013.

• Total Power 400 MW• 111 pcs. Wind turbines Siemens SWT 3.6-120

• Power 3,6 MW• Rotor diameter 120 m• Hub height 81,6 m

• 88 km² total area of the Windpark



Renewable Energy – Transformers for Wind TurbinesCustomer Siemens Wind Power / Dong Energy

Special Transformer Design for the Anholt project

• Transformer Rating 4 MVA• Ratio 33000 / 690 V

• Hermetically sealed with rubber bag• Filling with ester Midel 7131® (biodegradable)• Nomex® high temperature insulation• Fully aluminium windings• Zincflake coating system acc. C5M (marine

standard) with 240 µm layer thickness• KFAF cooling (forced liquid / forced air)• Installation inside the wind turbine



Energy Distribution – Generator Step Up TransformerCustomer KWD GmbH

Hydro Power Plant Dientenbach

Located in Austria / Salzburg in the Pinzgau area. In summer 2011, the power plant was commissioned and integrated into the 30 kV medium voltage system of the local utility Salzburg AG.

• Total Power 4700 kW• Pelton Turbine with 6 injectors• Annual production 20,5 Mio. kWh• 2500 l/s Water• Fall height 221 m• Pressure piping length 4170 m with 1200 mm diameter



Energy Distribution – Generator Step Up TransformerCustomer KWD GmbH

Transformer Design for project Dientenbach

• Transformer Rating 6300 kVA• Ratio 30200 / 6300 V

• Expansion tank design• Low loss design• Sound pressure level 45 dB(A) only @ 0,3 m• Zincflake coating system with 210 µm layer thickness• Fully type tested

• Noise level • Heat run test• Lightning impulse test• Partial discharge test



Due to many available drive/converter solutions, three main transformer designs are significant in this area:

• Transformer for 6-pulse operation• Designed as standard 2-winding transformer

• Transformer for 12-pulse operation• Designed as 3-winding transformer in double tier design

• Transformer for 24-pulse operation• Two double tier active parts in one transformer tank

Every converter transformer is designed for additional cooling capacity -Due to non-sinusoidal load and harmonic distortion, additional losses will occur.

Industrial – Transformers for Drive ApplicationsGeneral



Industrial – Transformers for Drive ApplicationsExample scheme

Single line diagrams for 24 pulse operation

Solution 1:Two seperate transformers with HV phase shift- Transformer 1 with +7,5°- Transformer 2 with -7,5°

Solution 2:One transformer with 4 shifted LV windings-7,5 / +7,5 / +22,5 / +37,5°



Industrial – Transformer for 24-pulse Drive ApplicationCustomer Mutanda Mining Group

Mutanda Mining (MUMI)

The Mutanda Mine is located in the Katanga province in the south of the Democratic Republic of Congo, main products are Cobalt and Copper. In November 2011, the operator GlencoreInternational started to upgrade the annual production with additional investments in new machinery

• Annual production:• 20.000 to Copper (increase up to 110.000 to)• 8.000 to Cobalt (increase up to 23.000 to)

• New SAG (semi autogenous grinding) mill:• 8,3 MW• Twin pinion design• 2 pcs. 24 pulse multiwinding transformers



Industrial – Transformer for 24-pulse Drive ApplicationCustomer Mutanda Mining Group

Transformer Design for MUMI twin pinion SAG mill

• Transformer Rating 5500 kVA (2 pcs.)• Ratio 22000 / 4 x 2200 V

• Vector group D+7,5°y11d0 and D-7,5°y11d0• Conservator hermetically sealed (rubber bag design)• Cable boxes IP54• Zincflake coating system acc. C5M marine standard

with 240 µm layer thickness• Fully equipped with CT’s for differential protection

• 3 pcs. CT’S HV side• 12 pcs. CT’s LV side

• Special protection devices



Summary

Portfolio factory Weiz, distribution transformers

• Standard transformers 1ph and 3ph up to 12,5 MVA• acc. standard IEC76/EN60076 and different national standards

• Industrial transformers (multiwinding, double tier etc.) up to 12,5 MVA• acc. IEC76 and also standards for converter load acc. EN61378

• Transformers for renewable energy (wind, photovoltaic, hydro)• with biodegradable liquids and lowest losses

• Distribution transformers with OLTC (on load tap changer)• 100% adjustable to nearly every special demand



Johann GriebichlerMarketing and Sales Distribution TransformersSiemens Aktiengesellschaft Österreich, Transformers Weiz

Elingasse 3A-8160 Weiz

Phone: +43 51707 71483Fax: +43 51707 55447Mobile: +43 664 80117 71483

E-mail:[email protected]

Contact

siemens.at/future-of-energy

Documents

Special Purpose Transformers - · PDF fileSpecial Purpose Transformers ... • Total Power 400 MW • 111 pcs. ... • Zincflake coating system with 210 µm layer thickness