Optimum Return Period of an Overhead Line Considering Reliability, Security and Availability with Respect to Extreme Icing Events
The paper presents a basis for computing the optimum return period of an overhead line under extreme icing events. The return period of the climatic loads is directly related to the expected line failure rate and hence, the reliability. A mathematical model is developed for a parallel line configuration to ensure that the line cost is balanced against the present value of the future failure cost. The future failure cost consists of two components; (1) cost of line replacement and (2) cost of energy not supplied. It is shown clearly that the optimum failure rate (hence the design return period) is significantly influenced by the duration of the line repair (hence the line security) after a line has failed. The line should be designed for a higher return period if the expected duration of repair is long. The sensitivity analysis shows that the optimum return period is strongly dependent on the repair rate and is less influenced by the unit cost of unsupplied energy.
Asim Haldar
Research & Development Nalcor Energy Hydro Place, 500 Columbus Drive St.Johns, NL, Canada A1B 4K7
国际会议
The 14th International Workshop on Atmospheric Icing of Structures(第十四届结构物大气覆冰国际研讨会 IWAIS 2011)
重庆
英文
15
2011-05-08（万方平台首次上网日期，不代表论文的发表时间）