1.
Measurements.
1.1.
Measurements of harmonics, Powers Active/Reactive loads and analysis of
the results (EAF-AC or EAF-DC and LF furnaces lines)
1.2.
Analysis of the THD degree and RMS Voltage variation during operations
with the new loads.
1.3.
Measurement and analysis of the Sort-Circuit Power of the Electrical
Power Supply incoming lines and secondary impedance of EAF-AC/DC arc
furance.
2.
Electrical Study.
2.1.
Drafting of EAF-AC/DC working curves with Furnace Transformer
2.2.
Better Melting points and profiles for TAP to TAP Heat optimum
operations.
2.3.
Check of typical heat performance in terms of heat profile, power input,
current level, refractory balance, electrode consumption and further key
factors for melting
2.4.
Calculus of the EAF-AC/DC Furnace Transformer working curves (Circle
Diagram) per each Voltage range of the trafo, with filtered power factor
correction SVC or Fixed Filters (with EAFs and LFs in operation).
3. EAF/LF
optimizition
3.1.
Drafting of AC/DC EAF working curves with Furnace Transformer
3.2.
Formulation of the Reactance value for the Serial Reactor for an optimum
operation.
3.3.
Better Melting points and profiles for TAP to TAP Heat operations.
3.4.
Calculus of the EAF Furnace Transformer working curves (Circle Diagram)
per each Voltage Tap of the trafo, with filtered power factor correction
SVC and taking All Tap Positions of the Series Reactors as parameter
(with EAFs and LFs in operation).
4.
Projects designs.
4.1.
Design of the Static Var Compensator (SVC)
4.2.
Design of the Fixed Filters Compensator (FC)
4.3.
Design of the new Furnace Transformer
4.4.
Design of the new Series Reactors
4.5.
Design of the SVC for the EAF-AC/DC
4.6.
Issue of relevant Technical Specification to inquire for Offers from
Suppliers.
4.7.
Technical evaluation of Offers.
4.8.
Design of the Furnace transformer for the AC/DC EAF furnace
4.9.
Design of the Series Reactors with the new Furnace transformer for the
EAF-AC/DC
4.10.
Issue of relevant Technical Specification to inquire for Offers from
Suppliers.
5.
Electrical Network Study.
5.1.
Complete study of the electrical network connected to the Electrical
Power Supplier grid (HV, MV)
5.2.
Evaluation of the impact caused by the new loads on the MV kV
distribution line (for instance, Load Flow, Harmonic Flow, Short-Circuit
Currents).
6.
Relaying.
6.1.
System Relaying protection, Planning, Setting and Coordination (HV, MV,
LV).
6.2.
Single line of Furnace by HV step down transformer to LV high current
secondary circuit.
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