How frequently should blackstart resources be tested?

Blackstart resources are critical components of the power system that ensure the ability to restore electricity following a widespread outage. The testing frequency for these resources is essential for maintaining operational reliability and ensuring that they can be relied upon when needed.

Testing blackstart resources every three years provides sufficient intervals to ensure that these resources are operational, functional, and capable of responding effectively when called upon. This time frame allows for a balance between frequency and practicality, ensuring that resources are regularly evaluated without imposing excessive burdens on their availability or on operational resources.

Regular testing helps identify any potential issues that may impair the blackstart capability, allowing for timely maintenance and upgrades. This is crucial because once a blackout occurs, the speed and efficacy of the restoration processes, including the deployment of blackstart resources, can significantly impact overall recovery time and system stability.

Other frequencies, such as annual tests, may lead to unnecessary operational disruptions, while longer intervals of five or more years might result in critical unseen deficiencies that could jeopardize the reliability of the power system during restoration efforts. Thus, a three-year testing cycle aligns with best practices for reliability while ensuring readiness for emergency situations.