Comprehensive detection method, device and system for measurement error of electronic transformer

The invention discloses a comprehensive detection method, device and system for measuring errors of an electronic mutual inductor, and belongs to the technical field of electric power. The method comprises the following steps: synchronously acquiring an output signal of a standard mutual inductor, an output signal of a secondary converter of the electronic mutual inductor and an output signal of a merging unit; calculating first power frequency amplitude phase information, second power frequency amplitude phase information and third power frequency amplitude phase information based on the output signal of the standard mutual inductor, the output signal of the secondary converter of the electronic mutual inductor and the output signal of the merging unit; and synchronously detecting measurement errors of the electronic transformer, the electronic transformer secondary converter and the electronic transformer merging unit based on the first power frequency amplitude phase information, the second power frequency