Active power distribution network fault positioning method based on multiple criteria

The invention relates to an active power distribution network fault positioning method based on multiple criteria, and the method comprises the following steps: collecting the measurement data of a power distribution network, and obtaining the state estimation information during the normal operation and the fault; after the fault occurs, traversing all the sections, accessing a fault branch to a single section of the power grid to simulate the fault condition of the section, and respectively acquiring the operation state estimation information of each section when the fault is assumed to occur; the obtained assumed fault state estimation value of each section is subtracted from the state estimation value when the fault occurs actually to obtain a comparison residual value; combining several assumed positions which are relatively close to the actual fault position into a region containing a plurality of power distribution network sections; collecting three-phase current phasor data and performing feature extra