Condition evaluation for 10 kV cables of Shenzhen Bureau based on CIGRE TB 358

The method to manage the remaining life of existing AC underground lines was introduced by CIGRE TB 358. In this paper, the evaluation method was modified and used to assess the condition of 10 kV distribution cables of Futian District in Shenzhen and optimize the maintenance strategy. The technology, economy, and strategy scores were considered for the final scores of the cables. The technical-part scores were mainly determined based on the operational years, operational environment, load conditions, laying and fault history of these cables. Finally, the preventive test and management strategy for these cables in the future were suggested according to the final scores.