Abstract
Abstract. Nowadays, faced with the ever-increasing dependence on diverse electronic devices and systems, the proliferation of potential electromagnetic interference (EMI) becomes a critical threat for reliable operation. A typical issue is the electronics working reliably in power-line networks when exposed to electromagnetic environment. In this paper, we consider a conducted ultra-wideband (UWB) disturbance, as an example of intentional electromagnetic interference (IEMI) source, and perform the impact evaluation at the loads in a network. With the aid of fast Fourier transform (FFT), the UWB transient is characterized in the frequency domain. Based on a modified Baum–Liu–Tesche (BLT) method, the EMI received at the loads, with complex impedance, is computed. Through inverse FFT (IFFT), we obtain time-domain responses of the loads. To evaluate the impact on loads, we employ five common, but important quantifiers, i.e., time-domain peak, total signal energy, peak signal power, peak time rate of change and peak time integral of the pulse. Moreover, to perform a comprehensive analysis, we also investigate the effects of the attributes (capacitive, resistive, or inductive) of other loads connected to the network, the rise time and pulse width of the UWB transient, and the lengths of power lines. It is seen that, for the loads distributed in a network, the impact evaluation of IEMI should be based on the characteristics of the IEMI source, and the network features, such as load impedances, layout, and characteristics of cables.
Highlights
In modern society, the loads distributed in power-line networks are not limited to conventional electrical loads
We consider a multi-junction power-line network, and the objective of our research is to investigate the impact by an intentional electromagnetic interference (IEMI) source on a targeted load
The UWB transient is differentially injected into the power line, and transverse electromagnetic (TEM) or quasi-TEM is the main mode of wave propagation
Summary
The loads distributed in power-line networks are not limited to conventional electrical loads. The integrated, digital, high-frequency operation trend makes these electronics more sensitive to electromagnetic (EM) disturbance, and correspondingly increases their vulnerability when the power-line network is exposed to EM environment (Meng et al, 2005; Vallbe et al, 2011). There are various types of EM signals, and the intentional electromagnetic interference (IEMI) is a particular class of high power EM threats to civilian society (Giri and Tesche, 2004; Månsson, 2008). The increased dependence on diverse electronic devices and systems, as well as the proliferation of high power EM sources, emphasize the great importance of studying the behavior of IEMI and its consequences
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