A DROOP CONTROL BASED PROPOTIONAL POWER SHARING METHOD FOR DC MICROGRIDS WITHOUT COMMUNICATION

Türkçe

Although DC microgrids are getting popular, load sharing is still an unsolved obstacle for widespread operation. Conventional droop method which is one of the most preferred load sharing method partially manages load sharing however this is related to equal line resistance. Also extra voltage drop arise out of the droop method is another disadvantage of the system. In this study a new approach which achieves proportional load sharing without communication is proposed for DC Microgrids. This method presents a variable DC voltage level like rectified sinusoidal voltage instead of a constant DC Voltage. By this way a periodical signal is generated and frequency of this signal is controlled according to loading level like the AC droop control. A comparative simulation study with conventional droop control is done to verify the proposed method. Results show that proposed method increased the voltage performance of the system nearly %5, load sharing performance %17.10.