مقاله انگلیسی رایگان در مورد کاربرد فتوولتائیک اینورتر خازن سوئیچ شده پنج سطحی – تیلور و فرانسیس 2022

Abstract

1. INTRODUCTION

2. FIVE-LEVEL SWITCHED CAPACITOR INVERTER

3. MODULATION TECHNIQUE

4. PHOTOVOLTAIC APPLICATIONS OF THE SUGGESTED INVERTER

5. SIMULATION RESULTS

6. CONCLUSION

DISCLOSURE STATEMENT

REFERENCES

Abstract

     This paper proposes a switched-capacitor based single-phase five-level inverter configuration that operates under boost operation and generates a voltage that is more than the DC source voltage. The proposed five-level inverter uses a capacitor and boots the output voltage. In this proposed inverter, capacitor gets charged in parallel while it discharges in series connections so that output voltage may attain higher magnitude than the DC source voltage. Sinusoidal Pulse Width Modulation-based techniques are considered to produce the required gate pulses for operating the switching devices of the inverter. The five-level switched-capacitor inverter is combined with the PV system via DC–DC boost converters to extract the maximum power using MPPT algorithm. To verify its capability, the PV-based system is further integrated to the utility grid. The operation and performance of the suggested switched-capacitor inverter coupled with the grid-connected PV system are also analyzed by developing its model in MATLAB/Simulink environment.

Introduction

     Power electronic converters are getting evolved due to technological advancement in the design of power electronic devices as well as increase in its demand for more applications. The growth in demand for inverters has been observed because due to its application in the renewable energy source. The lesser costs of modern power electronics components make them useful for manufacturing and helping them to compete in the market. However, multi-level inverters use more switches; it is still economical to replace two-level inverters with MLIs because of several benefits such as lesser harmonic content, switching stress, and power losses [1–3]. Many scholars have paid attention to improve inverter topologies and their control methods. The lesser number of power electronics components used in multilevel inverters can further reduce the manufacturing cost [4–6]. The Cascaded H-bridge (CHB) inverter [7] and Neutral Point Clamped (NPC) inverter [8,9] are two standard multilevel inverters and having several industrial applications such as EV/HEV, HVDC, renewable energy sources, high-power motor drives, FACTs, STATCOM [10,11]. Several three-phase and single-phase MLI topologies of high voltage and medium power have been implemented for different applications [12,13]. A five-level inverter using two diodes, six switches, and two capacitors is proposed in [14].

CONCLUSION

     The proposed five-level switched-capacitor inverter topo logy for the PV application has been investigated in this paper. The developed single-phase switched-capacitor based inverter configuration consists of eight switching devices, only one DC source and one switched-capacitor. The inverter can produce five levels output voltage and the maximum amplitude can be twice the magnitude of DC voltage source. Moreover, it is also noticed that the charging as well as discharging of the switched-capacitor in the proposed multilevel inverter topology is symmetrical for both polarities of the output. Hence, the issue of capacitor voltage balancing is solved by using the switched capacitor of the suggested rating. The model of the recommended inverter-based grid-tied PV system is established in MATLAB/ Simulink environment and the performance of inverter under different modulation indexes is found satisfactory. The effectiveness of a grid-tied system was also investigated under different irradiance. Hence it can be resolved from the analysis that the proposed inverter is proficient for the application of a grid-tide PV system.