Failure mechanism analysis and a life assessment method for clamps of distribution network devices under marine environment

Abstract

Device clamps are used for connecting and fastening lines， and their health condition directly affects the reliability of power supply. In view of the line faults largely caused by the failure of device clamps under marine environment， the clamp failure mechanism is analyzed and a life assessment method based on an improved neural network A-DBiLSTM is introduced. Firstly， a correlation model between the failure process and environmental factors is established through the simulation experiment of device clamp operation environment， and the key failure characteristics are extracted to develop the life state assessment index. Secondly， the A-DBiLSTM model is constructed， and the influence of multi-environmental factors and highly correlated environmental characteristics on the operating state of clamps is considered. The life assessment of clamps is achieved by focusing on the assignment of typical strong meteorological characteristics through the Attention mechanism. Finally， the method is validated based on the actual operation data of device clamps in an island distribution network in Zhejiang province. The results show that the method can accurately assess the life state of device clamps of distribution networks under different marine environments and is of practical value for ensuring line reliability， improving clamp operation management， and enhancing device quality.

Keywords

• distribution networks
• device clamp
• failure mechanism
• improved neural network
• attention machnism
• life assessment