> When load is being shed involuntarily, customers designated as “critical load” can be exempted. Critical load is typically demand from entities, such as hospitals, for whom a power interruption could be extremely costly. To be deemed as critical, the customer must first file paperwork. The winter storm revealed that certain parts of the natural gas supply chain – such as natural gas compressor stations – were not designated as critical load. In consequence, their power was cut, thereby reducing flows of natural gas along the state’s pipeline network and contributing to partial and complete derates at multiple natural gas power generation units. The loss of their output in turn necessitated further load shedding, potentially creating an unstable feedback loop. This represented a single point of failure in the energy supply system.
https://www.bakerinstitute.org/sites/default/files/2022-02/i... (pages 13-17)
https://engineering.cmu.edu/news-events/news/2023/04/25-gas-... ("U.S. natural gas pipelines vulnerable to electric outages")
https://www.sciencedirect.com/science/article/pii/S104061902... | https://doi.org/10.1016/j.tej.2023.107251 ("How vulnerable are US natural gas pipelines to electric outages?")