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An Interpolated-DFT Based Algorithm Suitable for P-Class Phasor Measurement Units (PMUs)

Scanlon, Nolan (2022) An Interpolated-DFT Based Algorithm Suitable for P-Class Phasor Measurement Units (PMUs). Master's Thesis, University of Pittsburgh. (Unpublished)

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The increase in renewable energy sources and inverter connected devices have caused the traditional power system to trend towards a low-inertia network. As a result, disturbances such as harmonic distortion, faster frequency dynamics, and amplitude steps are more likely. This has led to an increase in the number of phasor measurement units (PMUs) that are being utilized across transmission and distribution networks. PMUs are important measurement devices that have led to increased reliability and resiliency in the grid. PMUs are capable of reporting measurements at 10-120 frames per second which is much faster than supervisory control and data acquisition (SCADA) systems. The core of a PMU is the synchrophasor estimation algorithm used for precise estimation of the input signal's magnitude, phase angle, frequency, and rate of change of frequency (ROCOF) which is synchronized to Coordinated Universal Time (UTC).

The increasing penetration of phasor measurement units (PMUs) in transmission and distribution networks requires synchrophasor estimation (SE) algorithms with very high levels of precision that are robust against disturbances. The proposed method provides accurate synchrophasor measurements compliant with the IEEE/IEC International Standard for Synchrophasor Measurements for P-Class PMUs for static sinusoidal input signals with large frequency deviations, dynamic input signal conditions, and for short data records (as low as 1 period of the nominal signal). The method utilizes generalized maximum sidelobe decay (GMSD) windows and accounts for leakage produced by the conjugate component of the spectrum to produce precise results without the need for large data sets, iteration, or additional filtering.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Scanlon, Nolannjs83@pitt.eduNJS83
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairGrainger, Brandonbmg10@pitt.eduBMG10
Committee MemberKerestes, Robert/RJKrjk39@pitt.eduRJK39
Committee MemberCan-Cimino, Azimeazc9@pitt.eduAZC9
Date: 6 September 2022
Date Type: Publication
Defense Date: 5 July 2022
Approval Date: 6 September 2022
Submission Date: 7 July 2022
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 107
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Electrical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: discrete Fourier transform (DFT), interpolated DFT (IpDFT), phasor measurement unit (PMU), synchrophasor estimation (SE)
Date Deposited: 06 Sep 2022 16:29
Last Modified: 06 Sep 2022 16:29

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