Ghaly Ramy N R, Ibrahim Ali, Ghoneim Sherif S M, Abu-Siada Ahmed, Bajaj Mohit, Zaitsev Ievgen, Awad Hilmy
Mininstry of Higher Education, Mataria Technical College, Cairo, 11718, Egypt.
Chitkara Centre for Research and Development, Chitkara University, Baddi, Himachal Pradesh, 174103, India.
Sci Rep. 2024 Sep 27;14(1):22395. doi: 10.1038/s41598-024-72815-z.
The insulators of overhead power lines play a crucial role in maintaining the reliability of transmission and distribution networks. Because they are exposed to harsh and dynamic environmental conditions, it is essential to investigate the impact of environmental parameters such as pollution, inclined angle with the cross arm, and temperature on the dielectric performance of the insulators of overhead lines. Conventionally, the effect of such parameters can be investigated through experimental measurements of the insulator flashover voltage. However, this approach is costly and time-consuming and calls for the isolation of the lines to conduct the test, causing interruption to the entire grid. As such, there is an essential need to develop a new methodology to quantify the flashover voltage of overhead insulators operating under various environmental conditions, which is the main aim of this paper. The Central Composite Design is employed to develop a mathematical correlation between the insulator flash over voltage as a dependent variable and three environmental parameters: pollution level, inclined angle, and temperature as independent variables. The robustness of the developed equation is validated through extensive experimental measurements of the insulator's flash overvoltage under various conditions. Results reveal a good agreement between the actual and predicted flashover voltage using the developed correlation, as the absolute error for all investigated samples is less than 6%.
架空电力线路的绝缘子在维持输配电网络的可靠性方面发挥着关键作用。由于它们暴露在恶劣且动态变化的环境条件下，研究诸如污染、与横臂的倾斜角度以及温度等环境参数对架空线路绝缘子介电性能的影响至关重要。传统上，此类参数的影响可通过对绝缘子闪络电压进行实验测量来研究。然而，这种方法成本高昂且耗时，并且需要隔离线路来进行测试，会导致整个电网中断。因此，迫切需要开发一种新方法来量化在各种环境条件下运行的架空绝缘子的闪络电压，这就是本文的主要目的。采用中心复合设计来建立作为因变量的绝缘子闪络电压与三个环境参数（污染水平、倾斜角度和温度作为自变量）之间的数学关联。通过在各种条件下对绝缘子闪络电压进行广泛的实验测量，验证了所建立方程的稳健性。结果表明，使用所建立的关联关系得出的实际闪络电压与预测闪络电压之间具有良好的一致性，因为所有被研究样本的绝对误差均小于6%。
