A brief review on the application of droop control methods for voltage source converters in direct current microgrid

The microgrid acts as a single controllable system, and by generating flexible power, it ensures the reliability of the electric grid. The use of microgrid helps to solve environmental pollution problems. The microgrid control operation is different from the grid-connected mode. Based on the nature of bus voltage, microgrids are divided into two categories: DC microgrid and AC microgrid. Several studies have been conducted in the field of microgrid application and exploitation, but their expansion still faces various challenges. DC microgrids are more reliable than ac microgrids. The purpose of this article is to review the documentation and provide a short review on the application of the droop method to control parallel converters in direct current microgrids. Droop control method is a popular and well-known technique for sharing load power, which is widely used in DC microgrids. In this control strategy, the reference voltage of each source is determined based on the nominal output voltage, output current and loss factor, where the power sharing rateis determined by increasing the loss. The various advantages of direct current microgrids will cause them to be used more in the near future, so this review is for researchers as a preliminary research to study the development of direct current microgrids based on the application of droop control methods. And improving it can be useful.

کلیدواژه ها:

Droop strategy ، Microgrid ، Parallel converters control ، Renewable Energy