Maximizing Radiated High-Power Electromagnetic Threat to Transmission Line System Under the Constraints of Bounded Bandwidth and Amplitude

Abstract

This article aims at identifying the worst-case waveform of a radiated high-power electromagnetic (HPEM) for maximizing threats to the victim electric system. In contrast to the previous analysis where constraint on energy-density of the HPEM field is imposed, the proposed analysis considers an upper bound constraint for the amplitude of the electrical waveform, which appears to be a more concerned restriction for practical radiation system. In this connection, evolutionary algorithms, i.e., genetic algorithm, stud-genetic algorithm (StudGA), and particle swarm optimization, are resorted to for solving the problem. In particular, it is found that StudGA outperforms the other two approaches for solving the proposed problem. The results demonstrate an optimized wideband HPEM is only marginally more threatening to the victim system than an attentively tuned continuous-wave/narrowband interference, and it is a fairly good compromise to apply these fields for the worst-case immunity assessment, especially when the difficulty in generating wideband HPEM of complex waveform details is considered.