Which compliance percentage is associated with CPS1?

The compliance percentage associated with CPS1 (Control Performance Standard 1) is 100%. It is essential to understand that CPS1 is a reliability parameter designed to evaluate the performance of Balancing Authorities in maintaining the frequency of the electric grid. It measures the ability of a system to maintain its frequency within prescribed limits during a defined period.

In CPS1, a Balancing Authority must achieve a frequency response that keeps the system within certain operational frequency limits. The compliance percentage often signifies how well the entity can keep frequency stabilization—higher percentages indicate a better compliance to the system's operational standards.

The answer of 135% refers to the threshold beyond which a Balancing Authority is viewed as performing better than the minimum requirement but is not the required compliance percentage for CPS1, which is set at 100%. Here, it would be more appropriate to note that while the other numbers listed do not accurately reflect CPS1 compliance, they may reflect different regulatory or operational thresholds in the context of reliability and performance, but they do not represent the required compliance rate for CPS1.

In essence, CPS1 focuses on achieving and maintaining a balance within the frequency regulation that is critical for the reliable operation of the electric grid.