Study on Improved CG Algorithm for Reradiation Interference Calculation of Transmission Steel Tower

Abstract

With the development of extra-high voltage and ultra-high voltage transmission line in China, the reradiation interference generated by induced current on the surface of transmission steel tower becomes more serious to the radio station in the vicinity. In this paper, the calculation method for reradiation interference of transmission steel tower based on method of moment is analyzed. And in order to reduce the impedance matrix storage data in the memory space and the number of iterations in the calculation, the preprocessing of matrix sparse and diagonal norm precondition is presented to improve the performance of the conjugate gradient algorithm for the reradiation interference calculation. The reradiation interference of a standard 500 kV transmission steel tower is calculated using the improved conjugate gradient algorithm. And the results show that the algorithm enhances the convergence and stability after preprocessing and is suitable to calculate the reradiation interference of super-large metal truss structure target.INDEX TERMS Conjugate gradient, method of moment, reradiation interference, transmission steel tower.

Research on electromagnetism scattered from electricity power supply towers based on orthogonal test designs

“…North China Electric Power University has also researched line modeling of transmission tower spatial structures, during which overhead ground wires and metal structures were considered as a whole [11]. Three Gorges University has also used the characterological modal theory by studying the electromagnetic interference of drum towers, and the influence generated by the tower structure was taken into account during the study [12]. However, owing to the long-term national construction of electrical energy system development standards, the main factors affecting electromagnetism radiation scattered from UHV electricity transmitting pylons and their interrelationships need to be further explored in depth.…”