# Operation Risk Assessment of Urban Dense Cable Passageway Based on Fuzzy-Analytic Hierarchy Process
## 5 Conclusions  
Risk assessment of urban dense cable channel operation is crucial to ensure the safety of the urban power supply. This paper proposes a fuzzy-hierarchical analysis based on the urban dense cable channel operation risk assessment method. By analyzing the risk parameters of the cable body, channel, and external environment in detail, a comprehensive and reasonable assessment index system is constructed, which can systematically identify all kinds of potential risk factors. The weight vectors determined based on this method scientifically reflect the relative importance of the risk factors in the assessment of urban dense cable corridors, providing a strong basis for decision-making. Example calculations show that the constructed judgment matrix is effective and the assessment results are in line with the actual situation, proving the feasibility and accuracy of the method. This method can not only effectively deal with the uncertainty and ambiguity in the assessment process but can also adapt to the risk assessment needs of different types of cable channels, whether they are ordinary lines or important lines. Differentiated O&M strategies can be implemented for cable channels with different risk levels, such as regular patrols for low-risk channels and emergency drills or outages for medium- and high-risk channels, which helps to reasonably allocate O&M resources and improve the safety and reliability  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Indicator Layer** & **Channel 1** & **Channel 2** & **Channel 3** & **Channel 4** & **Channel 5** \\ \hline Overheating of cables & 1 & 0 & 1 & 0 & 0 \\ Ageing of cables and accessories & 0 & 0 & 0 & 1 & 1 \\ Overloaded operation & 1 & 0 & 0 & 0 & 0 \\ Mechanical damage & 0 & 1 & 0 & 0 & 0 \\ Grounding issues & 0 & 0 & 0 & 0 & 0 \\ Chemical corrosion factors & 0 & 0 & 0 & 0 & 1 \\ \hline Blocked or poorly ventilated passageways & 0 & 0 & 1 & 0 & 0 \\ Cable channel overcapacity & 0 & 1 & 0 & 0 & 0 \\ High and low voltage with channel laying & 0 & 1 & 0 & 0 & 0 \\ Irregular cable laying & 0 & 0 & 1 & 0 & 0 \\ Defective access facilities & 1 & 0 & 0 & 0 & 0 \\ Fire hazard & 0 & 0 & 1 & 0 & 1 \\ \hline Proximity to oil and gas pipelines & 0 & 0 & 1 & 0 & 0 \\ Groundwater level and humidity & 0 & 0 & 0 & 1 & 0 \\ Risk of external damage & 1 & 1 & 0 & 0 & 0 \\ Improper maintenance & 0 & 0 & 0 & 0 & 1 \\ Transportation and building construction & 0 & 0 & 1 & 0 & 0 \\ Urban climatic conditions & 0 & 0 & 0 & 0 & 0 \\ \hline \hline \end{tabular}
\end{table}
Table 6: Risk monitoring results for each cable channel indicator layer.  
of cable channel operation. This is of great significance for the stable operation of urban power grids.  
Conceptualization, Y.N. and D.C.; methodology, S.Z.; software, S.Z.; validation, Y.N., X.X. and Z.W.; formal analysis, S.Z.; investigation, X.W.; resources, X.X.; data curation, Z.W.; writing--original draft preparation, S.Z.; writing--review and editing, Z.W.; visualization, Y.N.; supervision, D.C.; project administration, X.W.; funding acquisition, Z.W. All authors have read and agreed to the published version of the manuscript.  
The authors declare that this study received funding from the China Southern Power Grid Company Limited's Science and Technology Projects (YN-KJXM20240027). The funder was not in-volved in the study design, collection, analysis, interpretation of data, the writing of this article, or the decision to submit it for publication.  
Not applicable.  
The original contributions presented in this study are included in the article. Further inquiries can be directed to the corresponding author.  
[PERSON], [PERSON], and [PERSON] were employed by the Electric Power Research Institute, Yunnan Power Grid Co., Ltd. The remaining authors declare that this research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflicts of interest.