GE Grid Solutions Uses Digital X-ray to Assess Substation Health for Petrobras in Brazil

GE Renewable Energy’s Grid Solutions Services team used digital X-ray technology — guided by the same principle utilized in the healthcare industry — to complement the preventive maintenance in Petrobras’ gas insulated substation (GIS), in the Abreu e Lima Refinery (RNEST), state of Pernambuco (Brazil).

Performed by GE in Latin America for the first time, the inspection strategy designed and implemented at RNEST included several complementary inspection methodologies that eliminate the necessity of opening the equipment to assess the condition of the high voltage circuit breakers. GE’s solution has enabled reduction of equipment downtime for preventive maintenance by up to 75%, minimizing impact on the operations while optimizing risk management through assertive and efficient asset assessment.

In operation for almost a decade, the RNEST 145 kV GIS substation has 15 bays. All equipment underwent preventive maintenance with non-intrusive inspection methodologies, leveraging GE's digital X-ray inspection technology that was applied to evaluate the busbar coupling bay breaker.

The overall scope of the inspection was made through dynamic contact resistance measurement, vibration analysis, partial discharge measurement and digital X-ray inspection. GE's Grid Solutions team analyzed data collected to recommend only essential corrective maintenance.