Method and system for estimating maximum bearing capacity of power distribution network

The invention discloses a method and a system for estimating the maximum bearing capacity of a power distribution network in the technical field of power distribution network planning, and aims to solve the problem that the bearing capacity evaluation method in the prior art only considers voltage deviation constraint and is inaccurate in evaluation result. Comprising the following steps: calculating the maximum bearing capacity under the voltage constraint of the power distribution network according to voltage loss; calculating the maximum bearing capacity under the current-carrying constraint of the power distribution network according to the line current-carrying; selecting the smaller value of the maximum bearing capacity under the voltage constraint of the power distribution network and the maximum bearing capacity under the current-carrying constraint of the power distribution network as the maximum bearing capacity of the power distribution network; the method is suitable for evaluating the maximum bea