| Summary: | Power converters are essential parts of microgrids (MGs), but they cause several problems. One of the most serious concerns with a DC microgrid (DCMG) is the constant power load (CPL), which has an incremental negative impedance (INI). INI has a negative dampening effect on the power efficiency of a power system. Sliding-mode control (SMC) has a hard attitude against external disturbances when compared to traditional control approaches like lead–lag, linear quadratic regulator, and PID. This paper suggests an adaptive sliding-mode control (ASMC) for a buck converter to supply a resistive and a CPL in a DCMG. The proposed controller provides large-signal stability during steady-state operation and maintains output voltage when the source voltage or CPL is changed. Moreover, the suggested controller significantly reduced the chattering effect, which is a major drawback of conventional SMC. An application of DCMG is presented to reveal the efficiency of the suggested ASMC method under both source voltage variation and constant power load variation.
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