What percentage is reflective of the minimum load required in a frequency bias setting?

In the context of frequency bias settings, the correct percentage that reflects the minimum load required is 1%. This specific percentage is crucial because it represents the threshold at which the system reacts to ensure stability and reliability in frequency management.

Frequency bias is used to maintain the balance between electricity supply and demand within a power system. When the system frequency deviates from the nominal value, the automatic generation control (AGC) responds by adjusting generation. The 1% minimum load requirement ensures that there is sufficient responsive generation available to maintain frequency within acceptable limits, thereby preventing potential blackouts or equipment damage due to fluctuations.

Other options, while they may represent higher response levels, do not align with the typical industry standard for minimum load percentage in frequency bias settings. Thus, the selection of 1% underscores its role as a foundational parameter for effective frequency control in power systems.