Great performance: extraordinarily
powerful transformer passed test
Siemens Transformer Co., Ltd (STCL) recently produced
the world’s most powerful 500-kV single-phase auto
transformer. It boasts a capacity of 1,500 MVA and was
manufactured for Shanghai-based utility SGCC’s Hongyang
power distribution project.
Specially designed and built for underground installation,
the transformer meets complex and demanding requirements in terms of cooling and mechanical design. The
insulation level specifications of the new transformer, for
instance, exceeded that of an average 500-kV transformer
by 10 percent, and the impedance can reach 22 percent.
Such parameters result in strict requirements in terms of
insulation design, magnetic leakage, and loss minimization control. To ensure the reliable operation of the transformer and to meet its outstanding cooling demands,
STCL also designed a precisely matched, advanced water
cooling system. Having successfully passed the required
technical testing procedures, the transformer underlines
STCL’s strength in the production of technically demanding high-quality transformers along with transformers
for the Shanghai Expo substation and the Beijing Yuanda
substation. It is another proof of STCL’s leading position
in the area of underground transformer technology.
STCL has accumulated abundant technical experience
since its foundation in 1994. Thanks to its strong technical
performance, the factory became Siemens’ only nonEuropean transformer design hub worldwide.
Siemens AG
Energy Management Division
Transformers
Katzwanger Strasse 150
90461 Nuremberg, Germany
Contact
Hao Sun
sunhao.stcl@siemens.com
Publisher and Copyright 2015:
Siemens AG
Energy Management Division
Freyeslebenstrasse 1
91058 Erlangen, Germany
siemens.com/energy/transformers