ABB wins USD50 million HVDC link refurbishment order in Mozambique September 24, 2012 | Middle East & Africa News ABB has been awarded a USD50 million order by power generator Hidroeléctrica de Cahora Bassa (HCB) for refurbishing the Songo high voltage direct current (HVDC) converter station in Mozambique. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password