Abstract
In this paper, a minimum-phase response fourth-order boost dc-dc converter (FBDC) exhibiting continuous input and output current is proposed. A voltage-mode controller is adopted to this converter to perform bus voltage regulation in a low voltage low power dc distribution system (LVPDS). FBDC supports additional load demand by interconnecting a second power source/battery. A systematic steady-state analysis for FBDC is established and the ripple content and other L-C design expressions are derived. The LVPDS is an integration of solar photovoltaic (PV) source using a conventional dc-dc boost converter (CBDC), and constant power load using a conventional dc-dc buck converter (CBuC). In this LVPDS, the FBDC primarily ensures dc bus voltage regulation, CBDC ensures the maximum power point tracking (MPPT) while CBuC regulates the load voltage. Various transfer function models, formulated through small-signal analysis, are used to address the controller design aspects and interconnected LVPDS stability issues. A generalized small-signal model of LVPDS is also developed to analyze the sub-system interactions arising during the coherent operation of BRC in this multi-converter system. The impact of connecting FBDC, as BRC, with other converters in the LVPDS is also analyzed. The laboratory prototype of a 48 V LVPDS is developed for experimental validation of bus voltage regulation and sub-system interactions. The theoretical and experimental results are found to be in close correlation with each other.
Highlights
Standalone single/multi-source low voltage low power dc distribution systems (LVPDS) involving small scale renewable energy generators (REGs) (such as solar photovoltaic (SPV), wind, fuel cell, and biomass, etc.), energy storage devices and loads have evolved as a viable solution to meet the power requirements of the secluded areas, still deprived of grid connectivity, and of urban residential buildings to reduce their dependency on conventional energy sources [1]-[6]
The steady-state and dynamic results of fourth-order boost dc-dc converter (FBDC) for standalone operation is presented thereafter results for its coherent operation with other converters interfaced in LVPDS, is presented
It was demonstrated that the optimal parameter selection shifted the right half plane (RHP) zero to lefthand side plane (LHP) simultaneously mitigating the impact of up-down glitch in the converter models
Summary
Standalone single/multi-source low voltage low power dc distribution systems (LVPDS) involving small scale renewable energy generators (REGs) (such as solar photovoltaic (SPV), wind, fuel cell, and biomass, etc.), energy storage devices (batteries / ultra-capacitors) and loads have evolved as a viable solution to meet the power requirements of the secluded areas, still deprived of grid connectivity, and of urban residential buildings to reduce their dependency on conventional energy sources [1]-[6]. LVPDS is formed by interconnecting several stages of dc-dc converters which process the power and carry out the power management task [3]-[4]. The performance of LVPDS depends upon the performance of individual converters and selection of converter topologies, for various purposes, is very significant.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
