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espanolEl analisis del comportamiento de una linea aerea frente al rayo es una parte importante del proceso de diseno de la linea. Debido a la naturaleza aleatoria del rayo, este analisis se debe realizar mediante calculo estadistico, generalmente basado en el metodo de Monte Carlo. Los procedimientos mas utilizados se basan en el empleo de un programa tipo EMTP (ElectroMagnetic Transients Program). El numero de simulaciones a realizar con el metodo de Monte Carlo y la complejidad del modelo de linea necesario cuando se usa un programa tipo EMTP hacen que el tiempo de simulacion sea muy largo. Una opcion para reducir este tiempo es el empleo de calculo paralelo: la distribucion de las tareas de calculo entre varios procesadores puede reducir el tiempo en una proporcion proxima al numero de procesadores. Este articulo resume el trabajo realizado por los autores para analizar el comportamiento de una linea aerea de transmision frente el rayo mediante una herramienta de simulacion tipo EMTP, un procedimiento basado en el metodo de Monte Carlo en el que el EMTP es controlado desde una aplicacion implantada en MATLAB, y el empleo de una instalacion multiprocesador. EnglishAn accurate calculation of lightning overvoltages is crucial for the design of overhead lines. Given the random nature of the lightning phenomenon, the procedure to be used must be statistical and generally based on the Monte Carlo method. Several simulation tools have been used to date for estimating the lightning performance of transmission lines. Some popular approaches use an EMTP-like tool. This type of approach has some drawbacks: the line must be represented using a complex and sophisticated model, and the application of a Monte Carlo method requires a high number of runs. A solution to this problem is the usage of a parallel computing environment, which can reduce the simulation time in a ratio close to the number of cores used in calculations. This paper presents a summary of the effort made by the authors for the development of a Monte Carlo procedure aimed at estimating the lightning performance of transmission lines by means of an EMTP-like tool and the use of a multicore installation, in which the EMTP is controlled from a custom-made application implemented in MATLAB.

Lightning performance analysis of transmission lines using the Monte Carlo method and parallel computing