Mitigation of Voltage by Using PV-Connected Super-Lift Luo Converter under Variation of Temperature

Abstract

This paper focuses on application a special type of DC-DC Converter called Super-Lift Luo Converter for load voltage mitigation due to variation in temperature. The converter is fed by a PV(Photovoltaic) System as input and its output is converted to AC Voltage by a Cascaded H-Bridge Inverter and this is integrated with grid and connected to load. In this work, the Super-Lift Luo Converter performance is studied.

Introduction

I. INTRODUCTION

The limitations of non-renewable energy sources gave rise to demand on power generation through renewable energy sources like solar, wind, tidal etc. Out of these, solar has significant advantage such as its availability, can be installed anywhere near house, industry etc. The recent application of such energy sources is that they are integrated to an electrical grid, such a power system is known as Grid Integrated PV system or Grid tied PV System [7].

The advantages associated with such system is that the overall reliability of the power system is increased and whenever there are faults in grid, the PV system can provide sufficient power without affecting the functionality of the load. Also, whenever PV system generates more power some of it is fed back into the grid or it can be stored in batteries to use at some other time.

PV Systems are dependent on Temperature and Irradiation, the temperature changes throughout the day and its variability are especially observed during monsoons, such variability may cause variation in PV output voltage and this voltage cannot be directly fed into the grid and it must be regulated regardless of any temperature variation. For this purpose, a DC-DC Converter controlled in closed loop fashion must be used [13]. The regulation of DC output voltage of PV System regardless of variation in temperature, was already obtained by a special type of converter called Luo converter whose duty cycle is controlled in closed loop fashion [1], [2]. This regulated DC Voltage is fed as an input to Cascaded H-Bridge Multi-Level Inverter whose AC output voltage is used for grid integration [6], [10], [12]. The MLI is switched by using Multicarrier Pulse Width Modulation [5].

This paper mainly focuses on how such system operates, its performance is studied and it was observed that under how voltage is mitigated or maintained constant when a DC-DC Converter called Super-Lift Luo Converter is utilized [3], [4]. The advantage associated with this converter is that the size as well as energy storage components were reduced.

Conclusion

Hence, from above simulation results it can be inferred that it was proposed to use a Super-Lift Luo Converter which employs reduced number components, reduced size of components its effect is the regulated output DC voltage performance is improved. Due to the improvement in Performance of DC Output Voltage the Load Voltage was also improved and %THD is reduced.

References

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Copyright

Copyright © 2023 Kondapalli Surya Teja, Anugu Ramakrishna Reddy, Peddapally Sandeep. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.