BITS Faculty Publications
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Item Second order harmonic ripple reduction in DC microgrid using sliding mode control approach(IEEE, 2016) Gautam, Aditya RA single phase inverter feeding AC loads injects a substantial pulsation of the second order harmonic current (SHC) ripple at DC link. Moreover, this ripple may propagate to the DC source in the absence of the suitable controller or large size DC link capacitor. This paper proposes a SHC ripple reduction technique based on the sliding mode control for the DC microgrid application. The control technique utilizes the concept of the output impedance shaping of the DC source in order to resist the propagation of the ripple to input. A non-isolated boost converter topology has been considered as a voltage booster. This converter feeds the single phase inverter loads, and also acts as the output impedance shaping tool of the source. The proposed control technique is verified using MATLAB-simulink.Item DC bus voltage regulation in the presence of constant power load using sliding mode controlled dc-dc Bi-directional converter interfaced storage unit(IEEE, 2015) Gautam, Aditya RThe paper presents a robust sliding mode controller for a dc/dc, bidirectional converter interfacing storage unit to ensure dc bus voltage regulation in a stand-alone dc microgrid. The dc bus supplies a combination of a constant power load and conventional resistive load. In order to enhance the battery life, a state-of-charge based charging algorithm is also implemented. Depending on the measured dc bus voltage, the controller selects the appropriate operating mode of the converter. The effectiveness of the proposed controller has been validated through simulation results.