Effects of Modulation Techniques on the Input Current Interharmonics of Adjustable Speed Drives

Adjustable speed drives (ASDs) based on a three-phase front-end diode rectifier connected to a rear-end inverter may generate interharmonic distortion in the grid. The interharmonic components can create power quality problems in the distribution networks such as interference with the ripple control signals, and consequently they can hamper the normal operation of the grid. This paper presents the effect of the symmetrical regularly sampled space vector modulation and discontinuous pulse width modulation-30$^{\circ }$ lag (DPWM2) techniques, as the most popular modulation methods in the ASD applications, on the drive's input current interharmonic magnitudes. Further investigations are also devoted to the cases where the random modulation technique is applied to the selected modulation strategies. The comparative results show how different modulation techniques can influence the ASD's input current interharmonics and consequently may not be a suitable choice of modulation from an interharmonics perspective. Finally, the theoretical analysis and simulation studies are validated with obtained experimental results on a 7.5-kW motor drive system.

[1]  D Basic,et al.  Input Current Interharmonics of Variable-Speed Drives due to Motor Current Imbalance , 2010, IEEE Transactions on Power Delivery.

[2]  E. Gunther,et al.  Interharmonics in power systems , 2001, 2001 Power Engineering Society Summer Meeting. Conference Proceedings (Cat. No.01CH37262).

[3]  Hsiung-Cheng Lin,et al.  Power Harmonics and Interharmonics Measurement Using Recursive Group-Harmonic Power Minimizing Algorithm , 2012, IEEE Transactions on Industrial Electronics.

[4]  Daniele Gallo,et al.  On the processing of harmonics and interharmonics in electrical power systems , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[5]  G. Chang,et al.  Measuring power system harmonics and interharmonics by an improved fast Fourier transform-based algorithm , 2008 .

[6]  Frede Blaabjerg,et al.  Effects of Passive Components on the Input Current Interharmonics of Adjustable-Speed Drives , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[7]  Wilsun Xu,et al.  Modelling of adjustable speed drives for power system harmonic analysis , 1999 .

[8]  A. Testa,et al.  On the Processing of harmonics and interharmonics: using Hanning window in standard framework , 2004, IEEE Transactions on Power Delivery.

[9]  T. H. Ortmeyer,et al.  Evaluation of current interharmonics from AC drives , 2000 .

[10]  Mark Sumner,et al.  Running DFT-Based PLL Algorithm for Frequency, Phase, and Amplitude Tracking in Aircraft Electrical Systems , 2011, IEEE Transactions on Industrial Electronics.

[11]  Math Bollen,et al.  Measurement of 182 Hz interharmonics and their impact on relay operation , 2000, Ninth International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.00EX441).

[12]  R. E. Morrison,et al.  Minimisation of interharmonic currents from a current source AC drive by means of a selective DC side active filter , 1995 .

[13]  R. Yacamini,et al.  Power system harmonics. IV. Interharmonics , 1996 .

[14]  Frede Blaabjerg,et al.  A Multipulse Pattern Modulation Scheme for Harmonic Mitigation in Three-Phase Multimotor Drives , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[15]  G.W. Chang,et al.  An analytical approach for characterizing harmonic and interharmonic currents generated by VSI-fed adjustable speed drives , 2005, IEEE Transactions on Power Delivery.

[16]  M. Hernes,et al.  Simulation of shaft vibrations due to interaction between turbine-generator train and power electronic converters at the Visund oil platform , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).

[17]  A. Testa,et al.  A new approach for the computation of harmonics and interharmonics produced by line-commutated AC/DC/AC converters , 2005, IEEE Transactions on Power Delivery.

[18]  P. Lehn,et al.  Interharmonics: Theory and Modeling , 2007, IEEE Transactions on Power Delivery.

[19]  Gary W. Chang,et al.  An Efficient Prony-Based Solution Procedure for Tracking of Power System Voltage Variations , 2013, IEEE Transactions on Industrial Electronics.

[20]  A. Testa,et al.  IEC flickermeter response to interharmonic pollution , 2004, 2004 11th International Conference on Harmonics and Quality of Power (IEEE Cat. No.04EX951).

[21]  Frede Blaabjerg,et al.  Characterization of Input Current Interharmonics in Adjustable Speed Drives , 2016 .

[22]  Vassilios G. Agelidis,et al.  Frequency Adaptive Least-Squares-Kalman Technique for Real-Time Voltage Envelope and Flicker Estimation , 2012, IEEE Transactions on Industrial Electronics.

[23]  Roberto Langella,et al.  On the use of unbalance definition to control compensators for arc furnaces , 2013, 2013 IEEE International Workshop on Applied Measurements for Power Systems (AMPS).

[24]  Thomas A. Lipo,et al.  Pulse Width Modulation for Power Converters: Principles and Practice , 2003 .

[25]  Cheng-I Chen,et al.  Comparative Study of Harmonic and Interharmonic Estimation Methods for Stationary and Time-Varying Signals , 2014, IEEE Transactions on Industrial Electronics.