Smart DC Power Management System Based on Software-Configurable Power Modules

Abstract

DC bus-based systems are envisioned as an enabling technology to integrate renewable energy sources, energy storage devices, and a variety of loads in a number of power management and distribution scenarios. The system design and integration challenges include accommodating heterogeneous components, the wide variability of operating conditions, and system stability issues arising from dynamical interactions between the components. This paper proposes a flexible, smart dc power management architecture based on identical digitally controlled bidirectional dc–dc modules that can be software configured to enable simple system design, exceptional system flexibility, and optimization of the use of available resources. Design of the reconfigurable digital control infrastructure of such versatile dc power system is discussed in detail from its system-level description to the low-level design of the digital compensators. Stability analysis of the dc bus voltage is also discussed, proving the robustness of the power architecture from a theoretical standpoint. The proposed approach is then demonstrated on an experimental dc power management system consisting of several 500 W, bidirectional dc–dc modules operating from a 24-V dc bus

Optimization procedure of source/sink converters for DC power distribution nano-grids

“…The lower total losses are obtained when a moderate switching frequency f sopt is chosen. As the expression obtained in (9) for P t only has a global minimum, the exact value of f sopt can be easily calculated using (10).…”

“…These converters are also responsible for tightly regulating the voltage of their output buses where different loads or sources are connected. In many applications, these elements to be connected to the buses are totally undefined at the design stage of the DC-PDSs [8]- [10], making this process significantly more complex. Good This work has been supported by the Spanish Government under the project MINECO-13-DPI2013-47176-C2-2-R, the Principality of Asturias under the grant "Severo Ochoa" BP14-085 and the project SV-PA-17-RIS3-4 and by European Regional Development Fund (ERDF) grants.…”

Energy Management of a Hybrid AC–DC Micro-Grid Based on a Battery Testing System

“…The core issue for V/I and V/P control methods is using the deviation of DC-bus voltage for autonomous power sharing among different power sources [19]. The limitation of the V/I and V/P schemes is that all the terminals sharing the same DC bus have to rigidly follow the preset droop curves without a flexible mode transition mechanism, especially when a voltage change occurs in the DC micro-grid [20].…”

Efficient Energy Management System for Solar Energy

“…Suitable choice for this controller implementation is FPGA that supports parallel and pipe-lined architecture for faster execution of algorithms [17][18][19][20].…”