A Phase-Locked Loop for the Synchronization of Power Quality Instruments in the Presence of Stationary and Transient Disturbances

Power quality instrumentation requires accurate fundamental frequency estimation and signal synchronization, even in the presence of both stationary and transient disturbances. In this paper, the authors present a synchronization technique for power quality instruments based on a single-phase softwa...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2007-12, Vol.56 (6), p.2232-2239
Main Authors: Cataliotti, A., Cosentino, V., Nuccio, S.
Format: Article
Language:English
Subjects:
Application software
Disturbances
Electric potential
Frequency estimation
Frequency synchronization
Instrument synchronization
Instrumentation
Instruments
Phase locked loops
phase-locked loop (PLL) control
Power quality
Resonant frequency
Software performance
Software quality
Standards development
Synchronism
Synchronization
Testing
transient disturbances
Voltage
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Summary:Power quality instrumentation requires accurate fundamental frequency estimation and signal synchronization, even in the presence of both stationary and transient disturbances. In this paper, the authors present a synchronization technique for power quality instruments based on a single-phase software phase-locked loop (PLL), which is able to perform the synchronization, even in the presence of such disturbances. Moreover, PLL is able to detect the occurrence of a transient disturbance. To evaluate if and how the synchronization technique is adversely affected by the application of stationary and transient disturbing influences, appropriate testing conditions have been developed, taking into account the requirements of the in-force standards and the presence of the voltage transducer.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2007.908350