Managing concurrent duties and time of wireless sensors in electrical power systems

Nordman, Mikael; Lehtonen, Matti; Vahamaki, O.

doi:10.1109/etfa.2003.1247751

Cited by 2 publications

(2 citation statements)

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“…Because sampling is not done every fundamental period, subsequent zero crossings can not be used as the input data of (9). Instead, assuming that T per is constant, the duration between the T per interrupt and the interrupt caused by the zero crossing is used in (9) instead. This duration is measured with timer T Z in Fig.…”

Section: Adjusting the Period Between Measurementsmentioning

confidence: 99%

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A wireless sensor concept for managing electrical distribution networks

Nordman¹,

Lehtonen²

IEEE PES Power Systems Conference and Exposition, 2004.

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In this paper, methods and analysis of a simple wireless sensor concept for detecting and locating faults as well as for load monitoring are presented. The concept is based on distributed wireless sensors that are attached to the incoming and outgoing power lines of secondary substations. A sensor measures only phase current characteristics of the wire it is attached to, is not synchronized to other sensors and does not need configuration of triggering levels. The main novelty of the concept is in detecting and locating faults by combining power distribution network characteristics on system level with low power sampling methods for individual sensors. This concept enables the sensor design to be simple, energy efficient and thus applicable in new installations and for retrofit purposes in both overhead and underground electrical distribution systems. IndexTerms-Power distribution, power system communications, power system monitoring, wireless transducers.

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Section: Adjusting the Period Between Measurementsmentioning

confidence: 99%

“…Continuous monitoring and reporting draws a great amount of energy. This energy may not be available and the activity of a sensor should be tuned accordingly [9]. GPS provides very accurate time synchronization, but is expensive and has high energy dissipation compared to other standard components used in wireless sensors of today [10].…”

Section: Introductionmentioning

confidence: 99%