The social value of risk-free government debt

The present disclosure discloses a method and device for determining static equivalences of distribution networks, relating to the technical field of static equivalences of power systems. The method comprises: acquiring node admittance matrices related to a border node and a distribution network, power loss and a voltage value and a current value of the border node; constructing static equivalence determination conditions for determining static equivalences of the distribution network, comprising a consistency of sensitivity equation, a consistency of power loss equation, an equivalent network power balance equation and a Kirchhoff's current equation; and calculating static equivalent parameters according to the static equivalence determination conditions. The inventive method and device are simple and effective, the consistency of sensitivity and power loss before and after equivalence are considered comprehensively, and the distributed generators' voltage and power support characteristics in an active distribution network are reserved.