Electrical power system metric data time difference compensation state estimation method

A power system measurement data time difference compensation state estimation method takes the quickest data acquisition time as the state estimation reference time to compensate measurement errors caused by other measurement time delays to obtain an updated electric network state. Regarding a PMU quick belt time mark measurement, updated real-time measurement data is adopted to take part in the state estimation and serve as the time of state estimation electric network section; regarding the measurements with time delays, corresponding time difference compensation factors are introduced according to the different time delays to finally obtain the updated state of the whole electric network through using the measurement variance of the updated continuous data section, modifying the time difference compensation factors according to the actual time delay conditions in the interactive process, and solving the time difference compensation state estimation equation.