“How can multiple utilities share electricity with each other?”
Electricity demand and supply can fluctuate greatly. And sometimes, one utility might become overwhelmed. To prevent this from occurring, a utility can enter into a Power Pool with other utilities. A Power Pool is a compilation of terms in which multiple utilities agree to share energy and resources. This can decrease operating costs and enable more reliability. However, pool agreements can be complex and might lead to some friction between different utilities.
Image Credit https://blogs.worldbank.org