Improvement in Performance of Series Z-Source Inverter with an Application as Solar PV Fed Water Pump


For a stand-alone solar pump, Z-source inverter (ZSI) is being preferred because of its single-stage power conversion capability with buck-boost ability. As compared to traditional ZSI, series Z-source inverter (SZSI) reduces the voltage stress on capacitor and inrush current of the inductor significantly. In this paper, modes of operation of the SZSI for an induction motor load are explained. When an induction motor runs at a low power factor, an additional mode exists. In this mode, high-magnitude pulses appear on the DC link voltage if the decoupling capacitor is not used with an unidirectional source like solar photovoltaic (PV). In addition, an improved modulation technique is proposed to improve the performance of SZSI. This paper presents a performance of SZSI with solar photovoltaic as a source and an induction motor coupled with the centrifugal pump as a load. Simulation results show the performance of the proposed scheme. Experimental and simulation results demonstrate the validity of analysis. Therefore, SZSI is a promising topology for the solar PV stand-alone system.

This is a preview of subscription content, log in to check access.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19
Fig. 20
Fig. 21
Fig. 22
Fig. 23
Fig. 24
Fig. 25


I inn :

Source current, A

I Ln :

Inductor current, A

I Cn :

Capacitor current, A

I linkn :

DC link current, A

V link :

DC link voltage, V

\(\Delta t = t - t_{n}\) :

Change in time period, s

V dc :

DC voltage in LC circuit, V

\(\omega = \frac{1}{{\sqrt {\rm LC}}}\) :

Resonant frequency of LC circuit

T s :

Period of carrier frequency, seconds

I LM :

Maximum value of inductor current, A

M :

Modulation index

D :

Shoot through ratio

V C :

Capacitor voltage, V

V PV :

Solar PV voltage, V

V L :

Inductor voltage, V

V P :

Decoupling capacitor voltage, V

f s :

Switching frequency, Hz

r L :

Equivalent resistance of inductor, Ω


  1. Adle RV, Renge MM, Muley SP (2015) Series Z-source inverter fed motor drive. In: 2015 international conference on industrial instrumentation and control (ICIC), Pune, pp 956–959

  2. Babaei E, Shokati AE (2017) Steady-state analysis of high-voltage gain multiple series Z-source inverter. IET Power Electron 10:1518–1528

    Article  Google Scholar 

  3. Fathi H, Madadi H (2016) Enhanced-boost Z-source inverters with switched Z-impedance. IEEE Trans Ind Electron 63:691–703

    Article  Google Scholar 

  4. Guisso RA, Andrade AMSS, Hey HL, Martins MdS (2019) Grid-tied single source quasi-source cascaded multilevel inverter for PV applications. Electron Lett 55:342–343

    Article  Google Scholar 

  5. Haitham A-R, Atif I, Sk A, Moin Peng F Z, Yuan L, Ge B (2013) Quasi-Z-source inverter-based photovoltaic generation system with maximum power tracking control using ANFIS. IEEE Trans Sustain Energy 4:11–20

    Article  Google Scholar 

  6. Huang Y, Shen M, Peng FZ, Wang J (2006) Z-source inverter for residential photovoltaic systems. IEEE Trans Power Electron 21:1776–1782

    Article  Google Scholar 

  7. Loh PC, Gao F, Blaabjerg F (2010) Embedded EZ-source inverters. IEEE Trans Ind Appl 46:256–267

    Article  Google Scholar 

  8. Mahmoudi H, Aleenejad M, Ahmadi R (2019) Torque ripple minimization for a permanent magnet synchronous motor using a modified quasi-Z-source inverter. IEEE Trans Power Electron 34:3819–3830

    Article  Google Scholar 

  9. Nguyen MK, Lim YC, Kim YG (2013) TZ-source inverters. IEEE Trans Ind Electron 60:5686–5695

    Article  Google Scholar 

  10. Pan L (2014) L-Z-source inverter. IEEE Trans Power Electron 29:6534–6543

    Article  Google Scholar 

  11. Peng FZ (2003) Z-source inverter. IEEE Trans Ind Appl 39:504–510

    Article  Google Scholar 

  12. Peng FZ, Shen M, Qian Z (2005) Maximum boost control of the Z-source inverter. IEEE Trans Power Electron 20:833–838

    Article  Google Scholar 

  13. Rajabi A, Simab M, Aghaei J (2018) Design of a power-conditioning system for trans-Z-source inverter to connect photovoltaic arrays to single phase household electrical grid. Iran J Sci Technol Trans Electr Eng 42:393–402

    Article  Google Scholar 

  14. Shen M, Peng FZ (2008) Operation modes and characteristics of the Z-source inverter with small inductance or low power factor. IEEE Trans Ind Electron 55:89–96

    Article  Google Scholar 

  15. Singh B, Dwivedi S, Sharma U, Jain C (2015) Solar PV array fed direct torque controlled induction motor drive for water pumping. In: 2015 annual IEEE India conference (INDICON), New Delhi, pp 1–6

  16. Tang Y, Xie S, Ding J (2014) Pulsewidth modulation of Z-source inverters with minimum inductor current ripple. IEEE Trans Ind Electron 61:98–106

    Article  Google Scholar 

  17. Yushan L, Baoming G, Haitham A-R, Peng FZ (2013) Control system design of battery-assisted quasi-Z-source inverter for grid-tie photovoltaic power generation. IEEE Trans Sustain Energy 4:994–1001

    Article  Google Scholar 

  18. Yushan L, Baoming G, Haitham A-R, Peng FZ (2014) Modelling and controller design of quasi-Z-source inverter with battery-based photovoltaic power system. IET Power Electron 7:1665–1674

    Article  Google Scholar 

  19. Yushan L, Baoming G, Haitham A-R, Sun H (2016) Hybrid pulsewidth modulated single-phase quasi-Z-source grid-tie photovoltaic power system. IEEE Trans Ind Inform 12:621–632

    Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Rahul Adle.



Flow chart for process system control is shown in Fig. 26.

Fig. 26

Flow chart of the system

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Adle, R., Renge, M. & Muley, S. Improvement in Performance of Series Z-Source Inverter with an Application as Solar PV Fed Water Pump. Iran J Sci Technol Trans Electr Eng 44, 1263–1279 (2020).

Download citation


  • Z-source inverter
  • Series Z-source inverter
  • Sinusoidal pulse width modulation
  • Shoot through
  • Induction motor
  • Solar photovoltaic
  • Water pumping