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Dual Sequence Controller with Delayed Signal Cancellation in the Rotating Reference Frame | IEEE Conference Publication | IEEE Xplore

Dual Sequence Controller with Delayed Signal Cancellation in the Rotating Reference Frame


Abstract:

Dual-sequence current controllers of voltage source converters (VSCs) feature two separate rotating reference frames (RRFs), commonly named dq frames, and rely on techniq...Show More

Abstract:

Dual-sequence current controllers of voltage source converters (VSCs) feature two separate rotating reference frames (RRFs), commonly named dq frames, and rely on techniques that isolate the positive and negative sequences of three-phase measurements. One of these techniques is the delayed signal cancellation (DSC). It is performed in the stationary reference frame (SRF), also known as αβ frame. The DSC combines old values of one axis with new values of the other axis of the SRF. The results are, then, transformed into the RRFs for use in the current controller. This filtering process introduces an extra layer of complexity for dual-sequence current controllers, which could otherwise operate solely in the RRFs. This paper introduces a frequency adaptive DSC method that operates directly in the RRF. Moreover, an averaging of two of the proposed DSC filters with contiguous integer delays is employed for reducing discretization errors caused by grid frequency excursions. A formal proof of the equivalence between the αβ and dq DSC methods is presented. Furthermore, computer simulations of a case study support the interpretation of the results.
Date of Conference: 02-05 November 2021
Date Added to IEEE Xplore: 23 December 2021
ISBN Information:
Print on Demand(PoD) ISSN: 1093-5142
Conference Location: Cartagena, Colombia
References is not available for this document.

I. Introduction

The traditional control in the rotating reference frame (RRF) (dq) of three-phase voltage source converters (VSCs) assumes that grid voltages are reasonably balanced. However, unbalances appear frequently in practical applications of grid-connected power electronic converters. When the grid voltage is not balanced, a second harmonic component appears in the instantaneous active power and hence dc-link voltage of the converter [1]. This degrades the performance and stability of the VSC. The performance of a VSC operating under unbalanced, reduced voltage, or fault conditions can be improved by dual-sequence current controllers [2]–[5].

Select All
1.
H. Akagi, E. H. Watanabe and M. Aredes, Instantaneous Power Theory and Applications to Power Conditioning, Hoboken, NJ:Wiley-Interscience, 2007, ISBN 978-0-470-11893-1.
2.
H. S. Song and K. Nam, "Dual Current Control Scheme for PWM Converter under Unbalanced Input Voltage Conditions", IEEE Transactions on Industrial Electronics, vol. 46, no. 5, pp. 953-959, Oct. 1999, ISSN 1557-9948.
3.
G. Saccomando and J. Svensson, "Transient Operation of Grid-Connected Voltage Source Converter under Unbalanced Voltage Conditions", Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248), vol. 4, pp. 2419-2424, Sept. 2001.
4.
P. Brogan, "The Stability of multiple High Power Active Front End Voltage Sourced Converters When Connected to Wind Farm Collector Systems", EPE Wind Energy Chapter Seminar, 2010.
5.
D. Siemaszko, "Positive and Negative Sequence Control for Power Converters under Weak Unbalanced Networks", Railway and Ship Propulsion 2012 Electrical Systems for Aircraft, pp. 1-6, Oct. 2012.
6.
F. Blaabjerg et al., "Overview of Control and Grid Synchronization for Distributed Power Generation Systems", IEEE Transactions on Industrial Electronics, vol. 53, no. 5, pp. 1398-1409, Oct. 2006, ISSN 1557-9948.
7.
L. H. Kocewiak, Harmonics in Large Offshore Wind Farms, 2012, [online] Available: https://vbn.aau.dk/en/publications/harmonics-in-large-offshore-wind-farms, ISBN 978-87-92846-04-4.
8.
J. B. Glasdam, Harmonics in Offshore Wind Power Plants: Application of Power Electronic Devices in Transmission Systems, Springer, pp. 219, Oct. 2015, ISBN 978-3-319-26476-9.
9.
S. Zhang et al., "Sequence Impedance Modeling and Characteristic Analysis of Island Inverter with Dual Sequence Control", 2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia), pp. 400-404, Nov. 2020.
10.
P. Rodriguez et al., "Decoupled Double Synchronous Reference Frame PLL for Power Converters Control", IEEE Transactions on Power Electronics, vol. 22, no. 2, pp. 584-592, Mar. 2007, ISSN 1941-0107.
11.
J. Svensson, M. Bongiorno and A. Sannino, "Practical Implementation of Delayed Signal Cancellation Method for Phase-Sequence Separation", IEEE Transactions on Power Delivery, vol. 22, no. 1, pp. 18-26, Jan. 2007, ISSN 1937-4208.
12.
F. A. S. Neves et al., "A Generalized Delayed Signal Cancellation Method for Detecting Fundamental-Frequency Positive-Sequence Three-Phase Signals", IEEE Transactions on Power Delivery, vol. 25, no. 3, pp. 1819-1825, Apr. 2010.
13.
S. Golestan et al., "An Efficient Implementation of Generalized Delayed Signal Cancellation PLL", IEEE Transactions on Power Electronics, vol. 31, no. 2, pp. 1085-1094, Feb. 2016, ISSN 1941-0107.
14.
D. d. S. Mota and E. Tedeschi, "Understanding the Effects of Exponentially Decaying DC Currents on the Dual dq Control of Power Converters in Systems with High X/R", 2021 IEEE 15th International Conference on Compatibility Power Electronics and Power Engineering (CPE-POWERENG), pp. 1-6, July 2021.
15.
Discrete-Time Notch Filter with Varying Coefficients, 2018, [online] Available: https://www.mathworks.com/help/releases/R2018a/control/ref/discretevaryingnotch.html.
16.
L. Ljung, System Identification: Theory for the User, Upper Saddle River, NJ 07458, USA:Prentice Hall PTR, 1999, ISBN 978-0-13-656695-3.
17.
S. J. Orfanidis, Introduction to Signal Processing, 1996, [online] Available: http://www.ece.rutgers.edu/~orfanidi/intro2sp.
18.
S. Golestan et al., "Moving Average Filter Based Phase-Locked Loops: Performance Analysis and Design Guidelines", IEEE Transactions on Power Electronics, vol. 29, no. 6, pp. 2750-2763, June 2014, ISSN 1941-0107.
19.
D. d. S. Mota, Frequency Adaptive Delayed Signal Cancellation Applied Directly to the Rotating Reference Frames of Dual-Sequence Current Controllers of Power Converters rev0.2.0, Oct. 2021, [online] Available: https://zenodo.org/record/5588091.
20.
J. A. Suul et al., "Tuning of Control Loops for Grid Connected Voltage Source Converters", 2008 IEEE 2nd International Power and Energy Conference, pp. 797-802, Dec. 2008.
21.
P. B. Brogan et al., "Improved Converter Network Bridge Controller", U.S. pat, Jan. 2021, [online] Available: https://uspto.report/patent/app/20210021209.
22.
S. K. Chaudhary et al., "Negative Sequence Current Control in Wind Power Plants With VSC-HVDC Connection", IEEE Transactions on Sustainable Energy, vol. 3, no. 3, pp. 535-544, July 2012, ISSN 1949-3037.

References

References is not available for this document.