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Sensors 2009, 9(9), 7412-7429; doi:10.3390/s90907412
Article

A Real-Time Smart Sensor for High-Resolution Frequency Estimation in Power Systems

1
,
1
,
1,* , 2
 and
3
1 HSPdigital Research Group, División de Ingenierías, Campus Irapuato-Salamanca, Universidad de Guanajuato / Carr. Salamanca-Valle km 3.5+1.8, Comunidad de Palo Blanco, 36700 Salamanca, Guanajuato, Mexico 2 Facultad de Ingeniería, Campus San Juan del Río, Universidad Autónoma de Querétaro / Río Moctezuma 249, Col. San Cayetano, 76807 San Juan del Río, Querétaro, Mexico 3 LabCASD, CIATEQ, Calz. del Retablo 150, Col. Fovissste, 76150 Querétaro, Qro., Mexico
* Author to whom correspondence should be addressed.
Received: 2 July 2009 / Revised: 9 September 2009 / Accepted: 14 September 2009 / Published: 15 September 2009
(This article belongs to the Special Issue Sensor Configuration and Smart Sensors)
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Abstract

Power quality monitoring is a theme in vogue and accurate frequency measurement of the power line is a major issue. This problem is particularly relevant for power generating systems since the generated signal must comply with restrictive standards. The novelty of this work is the development of a smart sensor for real-time high-resolution frequency measurement in accordance with international standards for power quality monitoring. The proposed smart sensor utilizes commercially available current clamp, hall-effect sensor or resistor as primary sensor. The signal processing is carried out through the chirp z-transform. Simulations and experimental results show the efficiency of the proposed smart sensor.
Keywords: smart sensor; frequency estimation; chirp z-transform; high resolution; power systems smart sensor; frequency estimation; chirp z-transform; high resolution; power systems
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Granados-Lieberman, D.; Romero-Troncoso, R.J.; Cabal-Yepez, E.; Osornio-Rios, R.A.; Franco-Gasca, L.A. A Real-Time Smart Sensor for High-Resolution Frequency Estimation in Power Systems. Sensors 2009, 9, 7412-7429.

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