State estimation bad data detection method and device, electronic equipment and storage medium

The invention discloses a state estimation bad data detection method and device, electronic equipment and a storage medium, which are used for solving the problem that whether bad data is caused by false data injection attacks or actual power grid accidents cannot be accurately and effectively distinguished when bad data detection is carried out on a state estimation measured value in the prior art. The method provided by the embodiment of the invention comprises the following steps: acquiring state estimation measurement data of the power system, wherein the state estimation measurement data comprises a historical state estimation value at a previous moment; performing state estimation by adopting the historical state estimation value to obtain a predicted measurement value at the current moment; calculating an actual measurement value at the current moment according to the predicted measurement value, and performing cosine similarity ratio calculation in combination with the state estimation measurement dat