Central and South West plans HVDC interconnection

Central and South West Corp. and its subsidiary CSW Energy Inc. have signed a letter of intent with Comision Federal de Electricidad (CFE) in Mexico City to undertake in-depth engineering studies and begin formal negotiations for the construction of a high-voltage, direct-current (HVDC) interconnection between the two utility systems.

Existing alternating current (ac) interconnections between CFE and Central and South West subsidiary Central Power and Light Co. in Corpus Christi have been in place for several years. Construction of the HVDC interconnection would eliminate problems created by the different operating systems and allow for easier interchange of power. A 230-kV ac transmission interconnection would connect an HVDC conversion station in McAllen, Texas, USA, with CFE`s Aeropuerto Substation, south of Reynosa, Tamaulipas. The letter of intent calls for more in-depth studies and contract negotiations. Once a final agreement is reached and regulatory approvals are obtained, construction of the interconnection is expected to take approximately two years.