In 2011, a critical power transformer unexpectedly failed at one of Salt River Project’s (SRP) vital receiving stations, resulting in a large-scale outage. An analysis determined the cause to be related to a bushing failure. Further analysis of historical outage data indicated that a significant proportion of SRP’s critical power transformer failures – particularly at high voltage levels – were due to bushing failures.
Therefore, SRP commissioned Black & Veatch to review the way SRP manages its 230 kilovolt (kV) and 500 kV transformer fleet. The review was to consider the complete asset life cycle, examining how SRP engineers design, install, maintain and manage these critical assets that contribute to overall system performance.