North American Electric Reliable Council (NERC) adopted the standard of series A (A1/A2) and series CPS (CPS1/CPS2) respectively in 1973 and 1996. Interconnected power system operation in North American is assessed by CPS now while ours is assessed by A.

• 1973年和1996年北美互联电网先后采用A系列(A1/A2)标准和CPS(CPS1/CPS2)系列标准,其现用标准是CPS标准。