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http://dx.doi.org/10.5370/JEET.2015.10.1.280

Current Decoupling Control for the Three-level PWM Rectifier with a Low Switching Frequency  

Yuan, Qing-Qing (Dept. of Optical-Electrical and Computer Engineering, University of ShangHai for Science and Technology)
Xia, Kun (Dept. of Optical-Electrical and Computer Engineering, University of ShangHai for Science and Technology)
Publication Information
Journal of Electrical Engineering and Technology / v.10, no.1, 2015 , pp. 280-287 More about this Journal
Abstract
Three-level PWM rectifiers applied in medium voltage applications usually operate at low switching frequency to keep the dynamic losses under permitted level. However, low switching frequency brings a heavy cross-coupling between the current components $i_d$ and $i_q$ with a poor dynamic system performance and a harmonic distortion in the grid-connecting current. To overcome these problems, a mathematical model based on complex variables of the three-level voltage source PWM rectifier is firstly established, and the reasons of above issues resulted from low switching frequency have been analyzed using modern control theory. Then, a novel control strategy suitable for the current decoupling control based on the complex variables for $i_d$ and $i_q$ is designed here. The comparisons between this kind of control strategy and the normal PI method have been carried out. MATLAB and experimental results are given in detail.
Keywords
Three-level PWM rectifier; Low switching frequency; Cross-coupling; Complex current controller;
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1 S. Kouro et.al., “Model predictive control - a simple and powerful method to control power converters,” IEEE Transactions on Industrial Electronics, Vol. 56, No. 6, pp. 1826-1838, June. 2009.   DOI   ScienceOn
2 J. Holtz et.al., “Design of fast and robust current regulators for high-power drives based on complex state variables,” IEEE Transactions on Industry Applications, Vol. 40, No. 5, pp. 1388-1397, Sept.-Oct.2004.   DOI   ScienceOn
3 J. Holtz et.al., “Estimation of the Fundamental Current in Low-Switching-Frequency High Dynamic Medium-Voltage Drives,” IEEE Transactions on Industry Applications, Vol. 44, No. 5, pp. 1597-1605, Sept. -Oct. 2008.   DOI   ScienceOn
4 J. S. Liang et.al., “A three-phase PWM AC-DC converter with low switching frequency and high power factor using DSP-based repetitive control technique,” 29th Annual IEEE Power Electronics Specialists Conferences, pp.517-523, 1998.
5 A. A. Rockhill et.al., “Grid-Filter Design for a Multi-megawatt Medium-Voltage Voltage-Source Inverter,” IEEE Transactions on Industry Applications, Vol. 58, No. 4, pp. 1205-1217, April. 2011.
6 L. Cristian et.al., “Frequency response analysis of current controllers for selective harmonic compensation in active power filters,” IEEE Transactions on Industrial Electronics, Vol. 56, No. 2, pp. 337-347, Feb. 2009.   DOI
7 J. Holtz. “The representation of AC machine dynamics by complex signal flow graphs,” IEEE Transactions on Industrial Electronics, Vol. 42, No. 3, pp.263-271, Jun. 1995.   DOI   ScienceOn
8 B. S. Chen, Automation control system for power drives, China Machine Press, chap. 8, 2003.
9 C. Z. Javier et.al., “A large power, low switching frequency voltage source converter for FACTS applications with low effects on the transmission line,” IEEE Transactions on Power Electronics, Vol. 27, No.12, pp.4868-4879, Dec.2012.   DOI   ScienceOn
10 X. Q. Li et. al., “Stability analysis of grid-connected inverters with an LCL filter considering grid impedance,” Journal of Power Electronics, Vol. 13, No. 5, pp. 896-908, Sept.2013.   DOI   ScienceOn
11 N. Oikonmou. Control of medium-voltage drives at very low switching frequency, Logos Verlag, 2008.
12 L.G. Franquelo et.al., “New trends and topologies for high power industrial applications: The multilevel converters solution,” International Conference on Power Engineering, Energy and Electrical Drives, pp.1-6, 2009.
13 A.G. Siemens. “Power semiconductors: for medium voltage converters-an overview,” 13th European Conference on Power Electronics and Applications, pp.1-14, 2009.
14 P. B. Rolando et.al., “Complex state variables modeling and nonlinear control of PWM voltage and current source rectifiers,” 28th Annual Conference of the IEEE Industrial Electronics Society, pp.187-192, 2002.
15 H. Akagi et. al., “A new power line conditioner for harmonic compensation in power system,” IEEE Transactions on Power Delivery, Vol.10, No.3, pp.1570-1575, July.1995.   DOI   ScienceOn
16 Z. C. Zhang et. al., “Multimodular current-source SPWM converters for superconducting a magnetic energy storage system,” IEEE Transactions on Power Electronics, Vol.8, No.3, pp.250-255, July.1993.   DOI   ScienceOn
17 J.A. Pontt et. al., “Network-friendly low-switching frequency multipulse high-power three-level PWM rectifier,” IEEE Transactions on Industrial Electronics, Vol.56, No.4, pp. 1254-1262, April.2009.   DOI   ScienceOn