Abstarct: In DC microgrids, when multiple power sources are connected in parallel on a common DC bus, proportional load sharing and accurate voltage regulation are important issues due to the different resistances of transmission lines between sources and loads. Additionally, the presence of a constant power load on the DC microgrid reduces system damping and microgrid instability. In this thesis, to solve the aforementioned problems, a control method baxsed on the adaptive droop characteristic in the presence of constant power load is proposed, so that in the DC microgrid under constant power load, a control method baxsed on a small droop resistance is used, in order to reduce the voltage deviation, and achieving proper load sharing at light loads. For heavy loads, a control method baxsed on nonlinear droop resistance is presented in order to improve the accuracy of load sharing and voltage regulation. Then, a control method baxsed on the adaptive droop characteristic for all load levels is presented, to improve the accuracy of load sharing and voltage regulation under constant power loads. A small-signal stability analysis was also performed and the results showed that the system is stable with the presence and variation of a constant power load, variations in load power level, and variations in transmission line resistance and inductance. No additional voltage compensation loop required, simple control system, maintains stability against changes in constant power loads and changes in transmission line parameters, maintains efficiency in the presence of resistive and constant power loads and using only local information are the features of the proposed control method. Simulations were also performed in MATLAB/SIMUlixnk of an island DC microgrid with two parallel boost converters with constant power load. Laboratory experiments were conducted utilizing two parallel boost converters with the assistance of DSP to validate the simulation outcomes. baxsed on the acquired findings, the control objectives have been achieved and the effectiveness of the suggested approach has been validated.