计及雷击浪涌传输效应的输电线路避雷器优化配置方法

Optimization of Lightning Arrester Configuration for Transmission Lines Considering Transmission Effect of Lightning Surge

安装输电线路避雷器(Transmission Line Surge Arresters,TLSA)是改善架空输电线路(Over Head Transmission Lines,OHTL)防雷性能的解决方案之一。基于此,提出了一种基于多目标优化算法和ATP(Alternative Transient Program)软件的OHTL避雷器新型优化配置方法。该方法通过考虑避雷器运行引起的雷击浪涌的传输效应,进行雷击闪络率计算,而已有文献中很少提及这种可导致相邻架空铁塔的转移机制。最后,在某实际230 kV输电线路中进行验证,该输电线路有231座架空塔和105 km长线路。与实际性能数据相比,所提方法具有最佳成本效益比,允许在使用90个避雷器(即0.86 TLSA/km线路)的情况下,减少68%的线路停运,这也是经典方法计算的避雷器数量的50%。此外,关于雷电浪涌的传输效应,仿真结果表明,如果在建模中未考虑该效应,防雷性能水平以及保护线路的TLSA数量可能会被低估。

Transmission line surge Arresters(TLSA)is one of the solutions to improve overhead transmis⁃sion lines(OHTL)lightning protection performance.Based on this,this paper proposes a new optimal configuration method of OHTL arrester based on multi-objective optimization algorithm and Alternative Transient Program(ATP)software.In this method,the lightning protection performance is calculated by considering the transmission effect of lightning surge caused by the operation of lightning arrester.Howev⁃er,there is little mention of this transfer mechanism which can lead to adjacent overhead towers.Finally,a 230 kV transmission line with 231 overhead towers and 105 km long line is verified.Compared to the actual performance data,the proposed method has the best cost-effectiveness ratio,allowing for a 68%reduction in line outages with 90 arresters(i.e.,0.86 TLSA/km lines),which is 50%of the number of arresters calculated by the classical method.In addition,with regard to the transmission effect of light⁃ning surge,the simulation results show that the level of lightning protection performance and the number of TLSA of protected lines may be underestimated if this effect is not considered in the modeling.