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Measurements&Studies

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Measurements, Studies and Calculations for the PowerCompensation of the

AC/DC EAF/LF furnaces in a Steelmaking Plant and Electrical Networks Power Supply.

 1.     Measurements and Tests.

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 furnace.

 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 EAF and LF 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 EAF and LF 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.     Power Systems 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.

  

 

Dr. Alberto Fragiacomo

 ITALY - North-East-Veneto; Winter Local Time: GMT+1

Mob.:  +39 347 2618940 ;  Email: wemes@wemes.it   
Update the: 10 febbraio 2021