Rapid Tracking of Grid Variables Using Prefiltered Synchronous Reference Frame PLL

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dc.contributor.author Subramanian, Chandrasekaran
dc.contributor.author Ragavan, K.
dc.date.accessioned 2015-01-18T10:44:40Z
dc.date.available 2015-01-18T10:44:40Z
dc.date.issued 2015-07
dc.identifier.citation Subramanian, Chandrasekaran and Ragavan, Kanagaraj, “Rapid tracking of grid variables using prefiltered synchronous reference frame PLL”, IEEE Transactions on Instrumentation and Measurement, DOI: 10.1109/TIM.2014.2366275, vol. 64, no. 7, Jul. 2015.
dc.identifier.issn 0018-9456
dc.identifier.uri http://dx.doi.org/10.1109/TIM.2014.2366275
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1566
dc.description.abstract For synchronization applications, synchronous reference frame (SRF) phase-locked loop (PLL) is widely deployed. Its performance is excellent when the input voltage consists of only fundamental positive sequence (FPS) component. If the grid voltage is unbalanced or polluted with harmonics and dc offset, its performance degrades. Many modifications were proposed to address this issue. However, the removal of dc offset and fundamental negative sequence (FNS) component without compromising the dynamic performance still remains a challenging task. To this end, this paper presents a rapid Type-1 SRF PLL scheme with preloop filtering stage for tracking the attributes of grid voltage FPS component. Fixed sampling period sliding discrete Fourier transform (SDFT) and instantaneous symmetrical components method are employed in the preloop stage. With this modification, the dc offset, harmonics and the FNS component are rejected and only the FPS component enters the PLL. As a result, transients vanish quickly. However, when the grid frequency drifts, SDFT causes amplitude and phase errors, and Type-1 PLL introduces a steady-state tracking error in phase. These errors are compensated with the help of an error correction criteria. Robustness and the improved transient response of the proposed scheme are demonstrated with an experimental study involving real-time controller board (dSPACE DS1104) and three-phase programmable power source. en_US
dc.description.statementofresponsibility by Chandrasekaran Subramanian and Ragavan Kanagaraj
dc.format.extent vol. 64, no. 7,pp.1826-1836
dc.language.iso en_US en_US
dc.publisher IEEE en_US
dc.subject Frequency estimation en_US
dc.subject Grid synchronization en_US
dc.subject Phase estimation en_US
dc.subject Sliding discrete Fourier transform (SDFT). en_US
dc.title Rapid Tracking of Grid Variables Using Prefiltered Synchronous Reference Frame PLL en_US
dc.type Article en_US
dc.relation.journal IEEE Transactions on Instrumentation and Measurement

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