In 2012, the association representing the major Electrical Systems Operators changed its name from Very Large Power Grid Operators to GO 15 - Sustainable and Reliable Power Grids, reflecting the concern of its members in its explicit aim of contributing to the increased reliability and sustainability of their electrical systems.

In the period 2011/12, the chairmanship was exercised by the President of Reseau de Transport Electricité, France. In the period 2012/13, took office the CEO of PJM Interconnection, United States. For the period 2013/14, was appointed President of the GO 15 ONS' CEO.

ONS kept participating in this group, once it is considered a relevant forum to the treatment of matters of interest to the operation of the Brazilian electric system. ONS participated directly in the work carried out regarding the issues that were prioritized, taking over coordination on some of these issues:

• Integration of renewable sources;
• DC systems at extra-high voltage (800 kV);
• Security versus cost in reliability assessment;
• Best practices for restoration of large systems;
• Overcoming levels of short circuit in equipment and facilities; 
• Specification and evaluation of the application Phasor Measurement Units (PMU) and
• Communication. 

Considering the expected evolution in the composition of demand and supply of electricity in the world, ONS also follows issues that will certainly have important repercussions for the operation of the BIPS in the future, such as:

• Development and penetration of electric vehicles;
• Energy storage systems;
• Evolution of the concept and implementation of SmartGrid, and
• New models for load forecasting.