Electric energy frequency monitoring device

The invention discloses an electric energy frequency monitoring device, and relates to the technical field of electric energy quality monitoring, and the device comprises a CPU plug-in, an AC plug-in, an output plug-in, an input plug-in, a 4-20mA plug-in, and a man-machine interaction plug-in. Wherein the CPU plug-in is electrically connected with the other plug-ins in parallel and is used for receiving and analyzing acquired data and judging whether a protection function is started or not; the alternating current plug-in collects current information and voltage information; the input plug-in collects a switching value; the opening and closing plug-in remotely controls opening and closing to protect tripping; the 4-20mA plug-in is used for collecting direct current information; the man-machine interaction plug-in is used for information interaction between the device and a user While the protection control of the high and low voltage sides of the electrochemical energy storage power station is realized, the r