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Customer Success Story

MMK

SVC for power quality of a very large EAF in Türkiye

Hitachi Energy has installed a Static Var Compensator (SVC) rated at 0-330 Mvar in a green-field steel plant in the Iskenderun area in Türkiye, owned and operated by MMK. The steel plant has a production capacity of 2.5 million tons of flat-rolled products and 1.2 million tons of cold rolled products annually. The purpose of the SVC is reduction of network disturbances emanating from the operation of a very large electric arc furnace (EAF) and a ladle furnace (LF), as well as power factor correction. The SVC was supplied under a turn-key contract together with 380/34.5 kV main power transformers as well as 380 kV and 34.5 switchgear. The SVC was commissioned in 2011.

The EAF, rated at 300 MVA, is among the largest ever installed in a steel plant in the world. The size of the SVC is directly correlated to the size of the EAF, and the SVC is among the largest of its kind for this purpose, as well.

Main data
System SVC
Commissioning year 2011
 Bus voltage 34.5 kV
 SVC rating 0-330 Mvar capacitive
 TCR 330 Mvar, in one single branch
 Harmonic filters 2nd harmonic / 69.7 Mvar
3rd harmonic / 69.8 Mvar
4th harmonic / 66.5 Mvar
5th harmonic / 64.8 Mvar
6th harmonic / 59.2 Mvar
 Control scheme Phasewise, open loop susceptance regulator, plus a three phase closed loop susceptance regulator
 Thyristor valve PCT equipped, water cooled, with indirect light firing.