The evaluation of the performance of the Quench Protection System (QPS) focuses
on the overall availability of the system and its impact on the accelerator
infrastructure in years from 2015 to 2018 that constitute Run 2. This
contribution provides an insight into the evolution of the system throughout Run
2 and analyses major limitations encountered in this period. Subsequently, a
discussion of planned optimizations and new installations is presented. Finally,
the impact of the evolution of the QPS in LS2 on future accelerator operation is
evaluated