Power grid relay protection setting key node screening method and device, terminal and medium

The invention discloses a power grid relay protection setting key node screening method and device, a terminal and a medium. According to the method provided by the invention, on the basis of the obtained power grid network topology, the cohesion degree, the protection response sensitivity and the protection response adaptability index of the power grid nodes are respectively calculated by combining the correlation state between the nodes in the power grid network topology, the average distance, the impedance parameter and other data; on the basis of the condensation degree, the protection response sensitivity, the protection response matching degree and the weight coefficient, the attention degree of the target nodes is calculated in a weighted summation mode, so that key nodes are determined by comparing the attention degrees of different target nodes; the technical problem that the reliability is low when key nodes needing to be set are screened according to historical data in combination with personal exp