Characteristics of Impulsive Noise in Electricity Substations

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Executive Summary

Impulsive noise has the potential to degrade the performance and reliability of wireless communications systems. Such noise, which is especially prevalent in high-voltage electricity substations, has discouraged electricity utility companies from deploying wireless technologies for operational purposes. If the rise-time of the noise pulses is sufficiently short the frequency spectrum will extend into the gigahertz region. This paper reports the characterization of impulsive noise from a 400/275/132 kV substation with special attention to noise energy in those microwave frequency bands not previously reported but relevant to new, short-range, technologies (in particular IEEE 802.11a/b/g, Bluetooth, ZigBee).

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