PMU-based electric power system distributed dynamic-state estimation method

The invention discloses a PMU-based electric power system distributed dynamic-state estimation method. According to the method, state estimations are respectively performed in a power plant and a transformer station, and state estimation results and a real state of a breaker are uploaded to perform a whole-system state estimation; based on a direct solution of a machine network interface, an error variance calculation method for converting a generator dynamic state estimation result into a network node voltage phase pseudo measurement at the same time; and a whole-system state estimation model relating to a generator dynamic state estimation constraint is established, whole-system state estimation precision is further improved through the generator dynamic state estimation constraint, and, compared with PMU direct measurement, the method further improves the precision.