The Porto Alegre 4 Substation, operated by MEZ ENERGIA, operates in the voltage classes of 230 kV and 13.8 kV and is undergoing a process of modernization of facilities and equipment.

CCESE carried out the following activities at the substation, in the 13.8 kV sector:

• Engineering and Logic Development of the Automatic Load Transfer System (STAC).

• Review of the logic of the Manual Load Transfer System (STMC).

• Review of Extended Transformer Parallelism logic.

• Review of the logic of the Reticulated Contingency System (SCR).

• Review and update of the GOOSE message database of the substation in the 13.8 kV sector.

• Implementation, functional testing and commissioning of new STAC logics for 10 13.8 kV bars.

• Functional testing and commissioning of the Manual Load Transfer System (STMC) logic.

• Functional testing and commissioning of Extended Transformer Parallelism logic.

• Functional testing and commissioning of the Reticulated Contingency System (SCR) logic.

• Updating logical diagrams.

• Preparation of technical report on functional tests and commissioning.

• Preparation of implementation report for the National System Operator (ONS).