Abstract
Digitalized substation area in power distribution system based on smart terminal unit has increasingly become an important carrier for the development of advanced business applications in the distribution network. This digitalization process has brought about important changes in the solution of fault location and judgment problem. This paper analyzes the principle of fault diagnosis of digitalized substation area, put forward an evaluation index system including first priority function index and second priority performance index, calculates the weight of each index by combining analytic hierarchy process and improved entropy weight method. And uses fuzzy comprehensive evaluation method to evaluate the result of fault diagnosis. The effectiveness of the proposed evaluation index and evaluation method is verified by an example.
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