A Phasor Estimation Algorithm based on Hilbert Transform for P-class PMUs

• Published in: Advances in Electrical and Computer Engineering Vol. 18; no. 3; pp. 97 - 104
• Main Authors: RAZO-HERNANDEZ, J. R., VALTIERRA-RODRIGUEZ, M., GRANADOS-LIEBERMAN, D., TAPIA-TINOCO, G., RODRIGUEZ-RODRIGUEZ, J. R.
• Format: Journal Article
• Language: English
• Published: Suceava Stefan cel Mare University of Suceava 01.08.2018
• Subjects: Accuracy; Algorithms; Analysis; Applied research; Electric power systems; error compensation; Field programmable gate arrays; Fourier transforms; Global positioning systems; GPS; Hilbert space; Hilbert transformation; IEEE Standards; Measuring instruments; Methods; Noise; phasor measurement unit; Phasors; Power electronics; power systems; Signal processing; Systems stability; Wavelet transforms
• ISSN: 1582-7445; 1844-7600; 1844-7600
• DOI: 10.4316/AECE.2018.03013

Phasor measurement units (PMUs) play an important role in many applications of power systems. In order to ensure a reliable performance, the phasor estimation algorithm has to satisfy a set of requirements stated in the IEEE Standard C37.118.1, which establishes the test conditions and requirements for steady-state and dynamic conditions. There, two classes of performance, P and M, can be found. In general, P-class is intended for applications that require fast response and M-class is used when greater precision is necessary. In this paper, a novel algorithm based on Hilbert transform for phasor estimation in compliance with the IEEE standard C37.118.1 for P-class is proposed. Advantages of the proposal are a fast response and a low computational burden due to the HT implementation as a low-order filter of one cycle. Further, two low-complex strategies of compensation are proposed. The proposal is validated using all the test conditions specified in the IEEE Standard C37.118.1. Besides that, real voltage and current signals of an electrical system are analyzed. The obtained results demonstrate that the new proposal can meet all the requirements for P-class performance. Index Terms--error compensation, Hilbert space, IEEE Standards, phasor measurement unit, power systems.