Document Type : Research Articles

Authors

1 Department of Electrical Engineering, Shabestar Branch, Islamic Azad University, Shabestar, Iran

2 University of Tabriz

3 Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran

Abstract

< p>In power converters, the total harmonic distortion (THD) can be decreased by using two strategies which are filtering and controlling methods. The filtering strategy is indeed costly because of using hardware devices (such as capacitor and inductor). A suitable strategy to control the modern power converters without using the hardware devices is the pulse width modulation (PWM) technique. In this paper, three new PWM control methods based on mathematical equations for various Z-source inverters (ZSIs) are proposed. Controlling the duty cycles of switches is the basic idea of these methods to control the output voltage. The proposed control methods are analyzed under the circumstances of constant input and balanced output voltage (CIBOV) and ripple input and balanced output voltage (RIBOV). The advantages of proposed methods are control of voltage, current and harmonic distortion. Other advantages of these methods are lower value for THD and elimination of low-order harmonics. The correctness operation of the proposed PWM techniques is proved by using the simulation results.

Keywords

Main Subjects

[1] E. Babaei, “A new pulse with modulation technique for
inverters,” Arabian Journal for Science and Engineering,
Vol. 39, No. 8, pp. 6235-6247, Aug. 2014.

[2] E. Babaei and M. Sabahi, “Development of pulse with
modulation technique for controlling invrters under
balanced and unbalanced operations,” Arabian Journal for
Science and Engineering, Vol. 39, No. 4, pp. 2941-2951,
Apr. 2013.

[3] S. Xiao, T. Shi, X. Li, Z. Wang, and C. Xia,
“Single-current-sensor control for PMSM driven by
quasi-Z-source inverter,” IEEE Trans. Power Electron.,
Vol. 34, No.7, pp. 7013-7024, Jul. 2019.

[4] N. Vosoughi, S. H. Hosseini, and Mehran Sabahi, “A new
transformer-less five-level grid-tied inverter for
photovoltaic applications,” IEEE Trans. Energy Convers.,
Vol. 35, No.1, pp. 106-118, Mar. 2020.

[5] X. Guo, N. Wang, J. Zhang, B. Wang, and M.K. Nguyen,
“A novel transformerless current source inverter for
leakage current reduction,” IEEE Access, Vol. 7, pp.
50681-50690, Apr. 2019.

[6] T. Ahmadzadeh, E. Babaei, M. Sabahi, and T.
Abedinzadeh, “An improved transformerless
grid-connected PV system with related control strategy to
reduce leakage current, extract maximum power point and
control power,” Iranian Journal of Electrical and
Electronic Engineering (IJEEE), Vol. 16, No.4, pp.
513-523, Dec. 2020.

[7] A. Karbalaei and M. Mardaneh, “Improved symmetric
switched-inductor/capacitor quasi Z-source inverter with
ability uplifted-boost,” International Journal of Industrial
Electronics, Control and Optimization (IECO), Vol. 3, No.
1, pp. 47-58, Jan. 2020.

[8] A. Karbalaei and M. Mardaneh, “Improved symmetric
switched-inductor/capacitor quasi Z-source inverter with
ability uplifted-boost,” International Journal of Industrial
Electronics, Control and Optimization (IECO), Vol. 3, No.
1, pp. 47-58, Jan. 2020.

[9] E. Babaei and T. Ahmadzadeh, “A new structure of
buck-boost Z-source converter based on Z-H converter,”
Journal of Operation and Automation in Power
Engineering (JOAPE), Vol. 4, No. 2, pp. 25-39, Dec.
2016.

[10] T. Ahmadzadeh and E. Babaei, “Improved quasi-Z-source
based three-Phase three-Level neutral point clamped
inverter,” in Proc. PEDSTC, pp. 99-103, 2018.

[11] T. Ahmadzadeh, E. Babaei, and M. Sabahi, “Modified
PWM control method for neutral point clamped ultilevel
inverters,” in Proc. ECTICON, pp. 765-768, 2017.

[12] M. Shen, J. wang, A. Joseph, F. Z. peng, L. M. Tolbert,
and D. J. Adams “Constant Boost Control of the Z-Source
Inverter to Minimize Current Ripple and Voltage Stress,”
IEEE Trans. Ind. Appl., Vol. 42, No.3, pp. 770-778,
May/Jun. 2006.

[13] R. Iijima, T. Isobe, and H. Tadano, “Optimized
short-through time distribution for inductor current ripple
reduction in Z-source inverters using space-vector
modulation,” IEEE Trans. Ind. Appl., Vol. 55, No. 3, pp.
2922-2930, May/Jun. 2019.

[14] S. Singh and S. Sonar , “A new SVPWM technique to
reduce the inductor current ripple of three-phase Z-source
inverter,” IEEE Trans. Ind. Electron., Vol. 67, No. 5, pp.
3540-3550, May. 2020.

[15] D. Shuai and Z. Qianfa, “Analysis and control of current
ripples of Z-source inverters,” IEEE Access, Vol. 8, pp.
41220-41228, Feb. 2020.

[16] M. Mohammadi, J.S. Moghani, and J. Milimonfared, “A
novel dual switching frequency modulation for Z-source
and quasi-Z-source inverters,” IEEE Trans. Ind. Electron.,
Vol. 65, No. 6, pp. 5167-5176, Jun. 2018.

[17] W. Xu, M. Liu, J. Liu, K.W. Chan, and K.W.E. Cheng, “A
series of new control methods for single-phase Z-source
inverters and the optimized operation,” IEEE Access, Vol.
7, pp. 113786-113800, Aug. 2019.

[18] L. Hang, U. Subramaniam, G. Bayrak, H. Moayedi, D.
Ghaderi, and M.R. Minaz, “Influence of a proposed
switching method on reliability and total harmonic
distortion of the quasi Z-source inverters,” IEEE Access,
Vol. 8, pp. 33088-33100, Feb. 2020.

[19] M. K. Nguyen, Y. C. Lim, and S. J. Park, “A comparison
between single-phase quasi-Z-source and quasi-switched
boost inverters,” IEEE Trans. Ind. Electron., Vol. 62, No.
10, pp. 6336-6344, Oct. 2015.