Next Article in Journal
ECG-RNG: A Random Number Generator Based on ECG Signals and Suitable for Securing Wireless Sensor Networks
Previous Article in Journal
Fabrication of Multimode-Single Mode Polymer Fiber Tweezers for Single Cell Trapping and Identification with Improved Performance
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle

Enhanced Interpolated Dynamic DFT Synchrophasor Estimator Considering Second Harmonic Interferences

1
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
2
Department of Engineering, Durham University, DH1 3LE Durham, UK
*
Author to whom correspondence should be addressed.
This manuscript is extension version of the conference paper: Chen, L.; Zhao, W.; Yu, Y.; Wang, Q.; Huang, S. Improved Interpolated Dynamic DFT Synchrophasor Estimator Considering Second Harmonic Interferences. In Proceedings of the 2018 IEEE International Instrumentation and Measurement Technology Conference, Houston, TX, USA, 14–17 May 2018; pp. 1–6.
Sensors 2018, 18(9), 2748; https://doi.org/10.3390/s18092748
Received: 17 July 2018 / Revised: 12 August 2018 / Accepted: 18 August 2018 / Published: 21 August 2018
(This article belongs to the Section Physical Sensors)
  |  
PDF [1069 KB, uploaded 31 August 2018]
  |  

Abstract

In the future, phasor measurement units are expected to be applied in distribution networks (DNs) for their control and monitoring. Because of the widely used power electronic devices in DNs, harmonics are widely present in a voltage/current signal. Particularly, second harmonics have the most significant uncertainty contributions to synchrophasor estimation, which is especially true when a short cycle observation window is used for a fast response. Based on the interpolated dynamic discrete Fourier transform (IpD 2 FT), this paper introduces an enhanced IpD 2 FT (e-IpD 2 FT) synchrophasor estimator that considers second harmonic interferences. First, the adaptive equivalent filters of the IpD 2 FT are given. Based on these, the optimal frequencies where the IpD 2 FT has the least second harmonic interferences are then searched using an enumeration method, and the e-IpD 2 FT synchrophasor estimator is accordingly proposed. Instantaneous frequency responses and several simulation tests show that the e-IpD 2 FT performs much better than the IpD 2 FT in second harmonic suppression, and can meet the P-class response time requirements and most of the M-class accuracy requirements of the IEEE standard C37.118.1 only over a three-cycle window. View Full-Text
Keywords: discrete Fourier transform (DFT); digital filter; interpolated dynamic DFT; synchrophasor estimation; second harmonic interference discrete Fourier transform (DFT); digital filter; interpolated dynamic DFT; synchrophasor estimation; second harmonic interference
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Chen, L.; Zhao, W.; Wang, F.; Wang, Q.; Huang, S. Enhanced Interpolated Dynamic DFT Synchrophasor Estimator Considering Second Harmonic Interferences. Sensors 2018, 18, 2748.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top