A Practical Reliability Model of Transmission Line Based on Main Influential Factors Recognition

Reliability analysis of different transmission lines based on its construction and maintenance conditions is very helpful in power system operation and management. In this paper, a novel overhead-line reliability management and modeling scheme is proposed in consideration of the geographic and weather influential factors. The concept and designing of an integrated transmission-line reliability monitoring and management system are introduced. Fuzzy description and classification criterions of seven line fault influential factors (lightning, ice, wind, animal contact, human elements, contamination flashover and the others) are proposed. Reliability models for lines and their terminals are constructed. Application of the proposed model in a 14-node system validates the feasibility and effectiveness of the proposed scheme.