BIPS’s Performance Indicators in 2015

Of a total of 3,253 disturbances registered in 2015, only two (0.06%) showed load cuts of more than 1,000 MW. In Figure 4, it can be observed that there were eleven events (0.3%) with a 500 MW load cut, and a total of 105 (3.2%) with a 100 MW load cut.

Figure4 –Evolution regarding the amount of disturbances and their impact on the BIPS

BIPS’s Robustness Indicator

A fairly representative performance indicator of the electric supplysecurityreached in 2015 in the BIPS, is the one regarding robustness, because it relates to the BIPS’s disturbances with the loadssupply. It is expressed by the ratio between the number of disturbances with a certain level of load shedding and the total number of disturbances.

The values calculated for the robustness index in 2015 are as follows, as shown in Figure 5:

• For any load shedding - the robustness was 89.58%.
• For load shedding above 100 MW - the robustness was 96.77%.
• For load shedding above 500 MW - the robustness was 99.66%.
• For load sheddingabove1,000 MW - the robustness was 99.94%.

Figure5 – BIPS’s Robustness Index (2011– 2015)