A Robust Controller for Stabilization HVAC Systems in Smart Homes

Advancement of power electronic systems and DC microgrids (DCMGs) causes a trend toward the realization of smart homes (SHs). Intelligent SHs comprise several renewable energy sources (RESs), energy storage systems (ESSs) and DC loads, which are integrated into the DCMG. In the SH, several loads such as washers and dryers, home appliances, and Heating, Ventilation and Air Conditioning (HVAC) systems are connected to the DC bus. Among them, HVAC systems in the SHs behave as a constant power load (CPL), which can affect the stability of the related power electronic converters in the DCMG. Due to the negative impedance characteristic of the HVAC systems in the SHs, eliminating the destructive behavior of these CPLs is a necessity. This paper presents a novel fractional order general type-2 fuzzy logic proportional-integral-derivative (FOGT2FPID) controller to solve the instability problem of the power electronic converters feeding HV AC system in the DCMG. Hardware-in-the-loop (HIL) experimental tests are carried out to verify the effectiveness and applicability of the proposed controller.