Frequency and Voltage Stability of the Islanded Microgrid with Multi DC-BUS Based-Inverter using Droop Control

Document Type : Research paper

Authors

1 Department of Electrical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 Department of Electrical Engineering, Shahid Chmaran University of Ahvaz, Ahvaz, Iran

Abstract

The widespread adoption of microgrids in electric power systems has brought numerous advantages such as decentralized control, reliability, cost-effectiveness, and environmental benefits. However, one of the most critical challenges faced by islanded microgrids is ensuring frequency and voltage stability. This paper addresses these stability issues that arise when microgrids operate independently, disconnected from the main network through the point of common coupling (PCC). These microgrids rely on renewable resources like photovoltaic (PV) systems, wind turbines, and energy storage systems, which often require DC to AC conversion through inverters to simulate synchronous generators. To overcome the frequency and voltage stability challenges, this research utilizes the droop control technique to regulate the active and reactive power of distribution generators (DGs). The droop control technique is implemented and simulated using MATLAB software, specifically employing a multi-DC bus-based inverter. The simulation results demonstrate that the DGs successfully supply the required total power to meet load demands while maintaining frequency and voltage stability. Through the droop control technique, active and reactive power sharing is achieved, ensuring stability at nominal values. The DGs can effectively maintain a constant power profile at desired values, even in the presence of static and dynamic loads.

Keywords

References

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Journal of Operation and Automation in Power Engineering
Volume 13, Issue 2
2025
Pages 121-126

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History

  • Receive Date: 09 February 2023
  • Revise Date: 04 June 2023
  • Accept Date: 08 June 2023
  • First Publish Date: 06 July 2023

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