Sergio Coreño-Alonso Email & Phone Number

Virginia, United States

Product: Mobile Substation and Power Transformers up to 300 MVA and 1175 kV BIL. Responsibilities:- Electrical Design of Power Transformers (Autotransformers, Mobile Substations, etc.).- Use programs: “VLN” transient analysis, “Telax” finite element electric fields and “TDS” thermal and short circuit.- Quote and design of new projects according to IEEE, IEC and customer specifications.- Development of tools in Excel to design Power Transformers.- Instructions for Manufacturing of Windings, Insulation, Cores, Reactors, PA and Tests.- Requisition of materials (copper of windings, cores, bushings, on-load tap changers, insulation, etc.).

Greater Minneapolis-St. Paul Area

Product: Mobile substations, Remanufacture of Power Transformers up to 200 MVA, 650 kV BIL.Responsibilities:- Repair and redesign of Power Transformers increasing their capacity, modifying voltage levels, and updating their technology according to IEEE and IEC standards.- Development of design tools in Excel (Calculation of residual humidity, liquid level, automatic characteristics plates, automatic test instructions, core requisitions, etc.).- Development of procedures (calculation of lock iron and welding, calculation of conductors for substations).- Requisition of core and conductors.

Siemens, Guanajuato , Mexico.

Siemens S.A. de C.V. (Guanajuato, Gto. México). Product: Power Transformers up to 440 MVA, and 1550 kV BIL. Responsibilities:- Manage and develop R&D projects focused on increase the competitiveness of Siemens; such as develop design tools, generate new parts, savings in materials and improvements in processes.- Project to implement the Siemens Transformers Technology in factory located in Mexico.- Create and manage design rules, research papers and manufacture manuals.- Coach to Junior engineers to achieve the team objectives.- Provide technical support to Purchasing area in development of new suppliers, to Quality area in failure analysis, and Production area to improve processes.Key Accomplishments:- Development of the area of R&D and team of work in Siemens Mexico.- Design and successful test of 3 models of off-load tap changers. IEC Std.. Saving € 252,000.- Successful tests UTE CTC. Estimated savings of € 250,000.- Creation of correction factors for no-load losses. Saving € 200,000.- Implementation of project Laminated Wood to replace T-X. Savings € 231,500.

General Electric - Bradenton Florida / Mexico City.

Product: New and refurbished Transformers Core and Shell up to 1200 MVA, 1675 kV BIL. Responsibilities:- Head of electrical design in the Mexico office.- Coach to Junior engineers to achieve the team goals.- Develop instructions for manufacturing, requisition of materials and test plans.- Pre-design for quotations according customer specifications and international standards.- Creation of design tools, and prepare failure report for customers (refurbished units).

Guanajuato, Gto.

Product: Power Transformers up to 440 MVA, and 1550 kV BIL. Responsibilities:- Design of Power Transformers (Step-up, Autotransformers, Auxiliary, Substation and Preventive-Autos) satisfying customer specifications and international / national standards. - Review of designs with consultants from customers.- Instructions to manufacture windings, insulation, cores, tests instructions, and supervision of the transformer along manufacturing process. - Teach and supervise the work made by junior designers.- Requisitions of materials in SAP program (copper for windings, steel for cores, bushings, load tap changers, insulation, surge arresters and others).

Irapuato Guanajuato Mexico

Professor of Master Degree. Thermal calculations for power transformers, and analysis with ANSYS

Master’S Degree, Power Transformers, Science Master Degree In Electrical Power Systems.

Thesis: “Development of a Method to Obtain the Propagation of Over Voltage Transients in Transformer Windings”.

Master’S Degree, Analysis And Develop Of New Business, Master Degree In Management

Engineer’S Degree, Electrical Engineering

Thesis: “Diagnosis and Monitoring of Power Transformers”.