You signed up for a discount for them to have permission to adjust your AC condensing demand run time when necessary, correct? I have never heard of a mandatory residential load shedding program in the US, but that doesn't mean they might be out there.
https://bgesavings.com/programs/ac/
> BGE‘s PeakRewards Air Conditioning program helps prevent the need for additional power plants, keep down the overall cost of electricity and ease the burden on Maryland’s electricity delivery system as the state’s population continues to grow. Plus, participants receive up to $100 in BGE bill credits each summer (June – September).
> The PeakRewards program is completely voluntary and is open to all BGE residential customers with central air conditioning or an electric heat pump in good working order, regardless of their choice of electricity supplier.