Power grid static stability dominant mode identification method based on voltage phasor trajectory

The invention discloses a power grid static and stable dominant mode identification method based on a voltage phasor trajectory, and the method comprises the steps: calculating the equivalent parameters of nodes of a whole network based on input wide-area measurement data; generating an equivalent two-node power grid parameter model based on the whole network node equivalent parameters; calculating a node voltage phasor trajectory based on the equivalent two-node power grid parameter model; based on the node voltage phasor trajectory, trajectory sensitivity of the node voltage phasor is calculated; determining a static stability dominant mode identification criterion based on the trajectory sensitivity of the node voltage phasor; and determining dominant states at different moments and dominant demarcation points of the dominant states in the dynamic evolution process of the power grid according to the static stable dominant mode identification criterion and the node voltage phasor trajectory. 本发明公开了一种基于电压相量轨