Similarity threshold determination method considering average fluctuation ratios of voltage curves

The invention provides a similarity threshold determination method considering the average fluctuation ratio of voltage curves. The method comprises the following steps of: A, obtaining distribution transformer related data which comprise corresponding relations between a 10kV line and distribution transformers, the names of the distribution transformers, the address codes of the distribution transformers, and the outlet voltage data of the distribution transformers; B, performing dimension reduction processing on the outlet voltage data of the distribution transformers acquired in the step A;C, calculating the average fluctuation ratio of voltage curves according to the outlet voltage data of the distribution transformers subjected to the dimension reduction processing in the step B; D,calculating the similarity of the voltage curves of the transformers of a transformer area under the same 10kV line according to the outlet voltage data of the distribution transformers preprocessed in the step B; and E, gradi