Abstract
In this paper, the performance of a new Z-source inverter (ZSI)-based single-stage power conditioning system (PCS) is analyzed for a standalone photovoltaic (PV) power generation system. The proposed ZSI-based PCS includes two main parts: one is the input from PV units and the other is the ZSI. In this work, a new topology, termed the switched inductor-assisted strong boost ZSI (SL-SBZSI), is introduced for improving the performance of the PCS. The proposed topology shows high boosting capability during the voltage sag in PV units due to variations in solar irradiation and temperature. Another key advantage is the reduced capacitor voltage stress and semiconductor switch voltage stress of the inverter bridge, which ultimately minimizes the size and cost of the single-stage PCS. The proposed ZSI topology falls under the doubly grounded category of inverter by sharing the common ground between the input and output. This is an additional feature that can minimize the leakage current of PV units at the ac output end. The operational principles, detailed mathematical modeling, and characteristics of the proposed SL-SBZSI for a standalone photovoltaic (PV) power generation system is presented in this paper for analyzing performance. The simulation results, which are performed in MATLAB/Simulink, demonstrate the improved performance of the proposed SL-SBZSI for the standalone PV system. The performance of the proposed topology is also evaluated through an experimental validation on a laboratory-based PV system.
Highlights
The worldwide number of installations of renewable energy sources (RESs) is growing steadily as the end-user consumption of electrical energy has increased drastically
The factors related to the different characteristics of the proposed. Based on onthese these operational states, the factors related to the different characteristics of the applications are determined along with the analysis proposed SL-SBZSI for standalone PV applications are determined along of these with thecharacteristics
This paper presented a novel Z-source inverter (ZSI) for standalone PV power conditioning systems
Summary
The worldwide number of installations of renewable energy sources (RESs) is growing steadily as the end-user consumption of electrical energy has increased drastically. RESs, such as fuel cells, solar cells, wind energy, etc., contribute a significant amount to the current electricity market. The output power of these RESs greatly depends on various factors, such as chemical reactions (e.g., in fuel cells), wind speeds (e.g., in wind generators), and intensity of the sunlight (e.g., in solar photovoltaic (PV). Fast-growing supercapacitor technologies as discussed in [2,3,4,5] effectively eliminate the variations in RESs due to several benefits, such as long life, high power density, and short charge/discharge application. As reported in [6], the amount of installed PV energy generation around. As reported in [6], the amount of installed energy generation thethe world was aroundis
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