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Modified impedance source inverter for power conditioning system

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Abstract

Based on classical impedance source inverter concept, this paper presents a modified impedance source inverter controlled by different pulse width modulation control strategies for solar PV/battery-powered applications. A brief topology analysis, generalized discussion and design of impedance network elements are presented. Comparison with the classical impedance source inverter is presented. Using simulation, analytical results are presented that ensure stability. The proposed voltage type inverter has reduced inrush current at startup, less capacitor voltage stress and minimum inductor current ripples. DC link voltage boost, reduced total harmonic distortion of output current and voltage, better voltage gain and wide range of output voltage control can be achieved easily with improved power quality. Experimental set-up of the modified impedance source inverter with Field Programmable Gate Array (FPGA) controller has been constructed to ascertain the results.

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Authors and Affiliations

  1. Department of Electrical and Electronics Engineering, Government College of Engineering, Tirunelveli, 627007, India

    J Suganthi

  2. Anna University, Chennai, 600025, India

    M Rajaram

Authors
  1. J Suganthi
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  2. M Rajaram
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Corresponding author

Correspondence to J Suganthi.

List of symbols

List of symbols

B :

boost factor

V C :

capacitor voltage

V PN :

DC link voltage

V P :

peak output voltage per phase

D sh :

shoot-through duty ratio

V dc :

input DC voltage

M :

modulation index

G :

voltage gain

V S :

voltage stress

T s :

time period for one switching cycle

T sh :

shoot-through time period

T 1, T 2 :

time interval for active states

T 0 :

time interval for null states

P :

power of PV panel

V :

voltage of PV panel

I l :

average inductor current

∆V c :

capacitor voltage ripple at peak power

∆I l :

inductor current ripple at peak power

f s :

switching frequency

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Suganthi, J., Rajaram, M. Modified impedance source inverter for power conditioning system. Sādhanā 42, 353–364 (2017). https://doi.org/10.1007/s12046-017-0608-x

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  • DOI: https://doi.org/10.1007/s12046-017-0608-x

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