Nation Attacks on power substations are growing. Why is the electric grid so hard to protect? December 30, 2022December 30, 2022 Dinah Voyles Pulver and Grace Hauck, USA TODAY Comments Off on Attacks on power substations are growing. Why is the electric grid so hard to protect? Suspicious activity at power substations has been on the rise even before attacks at two North Carolina substations in December. Here's what to know.