Comprehensive Condition-Information-Based Risk Assessment Method for Power Transmission Line

Abstract The traditional risk assessment methods do not adequately consider the specific operating environment and characteristics of a power transmission line. Therefore, a new risk assessment method considering the information of comprehensive conditions is proposed in this paper. First, a risk assessment model is designed via statistical methods based on the information on preceding failures and defects of a power transmission line. Then, the quantization processes of the state parameters of components in the transmission line are formed to get the risk assessment results considering historical failure information. These results are of failure probability meaning. Finally, the influences of the operating age of equipment in the transmission line, the position of the transmission line, the service time, and the working condition of the grid on the risk value of the transmission line are analyzed. An empirical example shows that the suggested method can predict the risks of transmission lines and offers a way for maintenance scheduling and equipment replacement.