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Analysis of reducing total harmonic distortion in a PV integrated micro inverter
Mohsin Tahir1, Sheeraz Ahmed2, Asif Nawaz3, Malik Taimur Ali4, Said ul Abrar5.
The significant growth in photovoltaic (PV) energy is experienced in the last decade
because of price reduction of PV modules and the revolution of PV micro inverters.
High performance and reliability are the key merit to match the life time of PV and
micro inverter. Multilevel micro inverters are mostly used for DC to AC power
conversion, and they are divided into two types: current source inverters (CSI) and
voltage source inverters (VSI). In the power industry, voltage source micro inverters
are much more commonly used to convert lower DC voltages to higher AC voltages.
The frequently used pulse width modulated (PWM) switching technology of DC
sources introduces harmonics into the inverter output voltage during conversion.
Total harmonic distortion (THD) is a measure of harmonic pollution in the power
system, and it has been discovered that THD of inverter output voltage is affected by
fluctuations in both DC voltages and switching angles of inverters. This study covers
inverters with unequal DC sources, which is a reasonable and practical assumption.
Evolutionary analysis is used to find the best DC voltages and switching angles for
minimizing THD. This paper proposed a reliability and performance enhancement
of micro inverter and new design has been proposed in single level and cascaded
multilevel micro inverter for full irradiance and partial shading conditions. Design
analysis with mathematical modeling is presented for the analysis of voltage and
current ripples as well as for total harmonic distortion (THD). Two different
scenarios are presented for simulations using MATLAB as tool. Results reveal that
partial shading does increase the 44.01 % harmonics with cascaded inverters;
however, the impact is limited as compared to single level micro inverter.
Affiliation:
- Iqra National University Peshawar, Pakistan
- Iqra National University Peshawar, Pakistan
- Women Campus, Dubai, , United Arab Emirates
- Iqra National University Peshawar, Pakistan
- The University of Agriculture, Peshawar, , Pakistan
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Indexation |
Indexed by |
MyJurnal (2021) |
H-Index
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2 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Scopus 2020 |
Impact Factor
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CiteScore (1.3) |
Rank |
Q3 (Electrical and Electronic Engineering)) Q4 (Electronic, Optical and Magnetic Materials) |
Additional Information |
SJR (0.298) |
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