Electric larceny problem online monitoring and positioning method based on Beidou

The invention relates to an electricity larceny problem online monitoring and positioning method based on Beidou, and the method comprises the following specific steps: triggering a sampling signal through a Beidou synchronous clock, and carrying out the ADC sampling of measurement points of different loops at the same time; accumulating the instantaneous values acquired at the same moment of the branch lines to form a virtual current instantaneous value of a virtual measuring point of the upper-level line; respectively calculating current effective values according to the actually measured current instantaneous value and the virtual measuring point current instantaneous value; comparing the current effective values of the actual measurement point and the virtual measurement point, calculating the difference value of the current effective values, and judging whether current abnormity exists or not according to the difference value; when the current is abnormal, carrying out subtraction calculation on instanta