What does PJM request during a low voltage alert?

During a low voltage alert, PJM requests a Reactive Reserve Check (RRC) from its participants. This action is critical because low voltage conditions can arise from various factors, including insufficient reactive power support. Conducting an RRC allows PJM to assess whether there are adequate reactive resources available to counteract the low voltage situation, ensuring that voltage levels can be maintained within acceptable limits. Reactive power is essential in managing voltage levels on the power system, and understanding the availability of these reserves is vital for maintaining system reliability and stability during such alerts. This proactive step helps prevent further deterioration of voltage and supports overall grid health.

In this context, the other options do not align with the specific request made during a low voltage alert. Load forecast updates, power generation reports, and operational readiness assessments are important for general operations but do not directly address the immediate need for reactive power management during a low voltage condition.