The invention discloses a nonlinear fuzzy detection method for operating safety of a
power cable tunnel. The method comprises the following steps of: determining a project layer, a subproject layer and an index layer in a model, detecting the index layer and acquiring data; establishing a comment set; establishing a deterioration grade of each evaluation index and a
membership function matrix of a corresponding comment set; determining weight of each level of evaluation indexes; sequentially calculating fuzzy evaluation matrixes of the index layer and the subproject layer by using an analytic hierarchy method until a final fuzzy
evaluation result vector is obtained; and determining an
evaluation result of an operating safety state of the
power cable tunnel by using a maximum membership degree method.
Single parameter early warning of the operating state of the cable tunnels and cables is realized, comprehensive on-line
safety index evaluation and early warning are realized,
technical support is provided for timely and effectively
processing operating hidden dangers and failures of the cables, and after the project is finished, abnormal power failure can be reduced, and major disasters can be warned in advance; and an inspection
workload of a worker is reduced. After the project is finished, the method can be popularized nationwide and has high economic and
social benefits.