Development of multiple input supply based modified SEPIC DC-DC converter for efficient management of DC microgrid

Area of Science:

• Electrical Engineering
• Power Electronics
• Renewable Energy Systems

Background:

• DC microgrids require efficient power management solutions.
• Multi-input converters are crucial for integrating diverse DC sources.
• Existing converters face challenges with varying voltage ranges and operating conditions.

Purpose of the Study:

• To develop a modified SEPIC converter for efficient DC microgrid management.
• To enable seamless integration and management of power from two DC sources.
• To enhance power flow efficiency and stability in DC microgrids.

Main Methods:

• Development of a multiple input supply based modified SEPIC DC-DC Converter.
• Detailed analysis of working states, equivalent circuits, and theoretical waveforms.
• Application of large-signal, small-signal, and steady-state modeling techniques.
• Validation through theoretical analysis and MATLAB simulations.

Main Results:

• The proposed Multi-Input SEPIC converter demonstrates versatility in output voltage handling.
• Efficient power flow is achieved even under challenging low duty cycle conditions.
• MATLAB simulations confirm the theoretical analysis and performance.
• Comparative analysis shows competitiveness against similar converter topologies.

Conclusions:

• The developed multi-input SEPIC converter is effective for DC microgrid power management.
• The converter offers improved efficiency, stability, and flexibility in power delivery.
• The proposed topology presents a viable solution for integrating multiple DC sources in microgrids.