Abstract
This paper presents a comprehensive approach for performing phasor and frequency estimation from voltage and/or current signals of the modern power system. Undesirable components, such as decaying DC, if present in the input signal, are first attenuated using a complex-gain filter. The initial estimates of phasor and frequency are obtained next using the discrete Fourier transform and an improved estimation of signal parameters via rotational invariance technique, respectively. Finally, the accuracy of phasor and frequency estimates are increased based on the identified system condition. Simulations performed to evaluate the proposed approach confirm that it can do fast and accurate estimation of phasor and frequency under diverse operating conditions, making it ideal for wide-area monitoring, protection, and control applications in power systems.
Highlights
Introduction and BackgroundPhasor and Frequency EstimationOptimal energy management in smart grids requires an enhanced visualization of its system parameters, e.g., voltage/current phasors and frequency
Accurate, and robust phasor and frequency estimates under diverse operating conditions. It detects abnormal system conditions quickly. It satisfies the requirements of relevant IEEE and IEC Standards [29,30]
In the following sub-sections, several static and dynamic test signals that comply with the IEEE and IEC Standards [29,30], as well as power system signals, are used to investigate the performance of the proposed approach
Summary
Optimal energy management in smart grids requires an enhanced visualization of its system parameters, e.g., voltage/current phasors and frequency. Performance evaluation of the proposed approach using different test signals indicates that it makes the following salient contributions: 2 It efficiently suppresses undesirable components present in the input signal, and can be applied to both voltage and current signals. It provides fast, accurate, and robust phasor and frequency estimates under diverse operating conditions (faults, frequency ramps, power swings, harmonics). Accurate, and robust phasor and frequency estimates under diverse operating conditions (faults, frequency ramps, power swings, harmonics) It detects abnormal system conditions quickly (in less than one-cycle). It satisfies the requirements of relevant IEEE and IEC Standards (this paper focuses on P-class PMUs which have more stringent speed requirements) [29,30]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
