Modeling and Control of Three-Port DC/DC Converter Interface for Satellite Applications
TL;DR: In this article, the authors presented the control strategy and power management for an integrated three-port converter, which interfaces one solar input port, one bidirectional battery port, and an isolated output port.
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Abstract: This paper presents the control strategy and power management for an integrated three-port converter, which interfaces one solar input port, one bidirectional battery port, and an isolated output port. Multimode operations and multiloop designs are vital for such multiport converters. However, control design is difficult for a multiport converter to achieve multifunctional power management because of various cross-coupled control loops. Since there are various modes of operation, it is challenging to define different modes and to further implement autonomous mode transition based on the energy state of the three power ports. A competitive method is used to realize smooth and seamless mode transition. Multiport converter has plenty of interacting control loops due to integrated power trains. It is difficult to design close-loop controls without proper decoupling method. A detailed approach is provided utilizing state-space averaging method to obtain the converter model under different modes of operation, and then a decoupling network is introduced to allow separate controller designs. Simulation and experimental results verify the converter control design and power management during various operational modes.
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Figures
Fig. 7. (a) Model comparison due to duty-cycle step. (b) Averaged model and circuit model comparison for battery-regulation mode. 
Fig. 17. Different mode operations based on available solar power, battery state of charge, and load profile; left column shows four stages in satellite’s one-orbit cycle; for the right column, top one shows input solar panel voltage and current, middle one represents battery voltage and current, and the bottom one shows output-port load level, while its voltage is regulated all the time. 
Fig. 1. Three-port modified half-bridge converter topology, which can achieve ZVS for all three main switches (S1, S2, and S3) and adopt synchronous rectification for the secondary side to minimize conduction loss. 
TABLE I COMPARISON OF CONVENTIONAL STRUCTURE AND INTEGRATED STRUCTURE 
Fig. 8. Small-signal model of battery-regulation mode, control inputs and outputs are decoupled to enable separate controller design. Vo ref and Vb ref are the references for output voltage and battery voltage, respectively. HOVR and HBVR are the compensators that need to be designed. 
Fig. 16. (a) Battery-regulation-mode load step response. (b) Battery-balancedmode load step response.
Citations
Overview of Power Management Strategies of Hybrid AC/DC Microgrid
Farzam Nejabatkhah,Yun Wei Li +1 more
TL;DR: This paper presents an overview of power management strategies for a hybrid ac/dc microgrid system, which includes different system structures, different operation modes, a thorough study of various power management and control schemes in both steady state and transient conditions, and examples of powermanagement and control strategies.
931
Modeling and Control of a New Three-Input DC–DC Boost Converter for Hybrid PV/FC/Battery Power System
TL;DR: In this paper, a three-input dc-dc boost converter is proposed for hybridizing alternative energy sources such as photovoltaic (PV) source, fuel cell (FC) source and battery.
418
Energy storage system: Current studies on batteries and power condition system
TL;DR: The application status of the energy storage system in the renewable energy power generation is concluded and the critical problems that need to be addressed during the construction and operation of the storage system are indicated.
393
Review of Multiport Converters for Solar and Energy Storage Integration
TL;DR: This paper presents a comprehensive review of multiport converters for integrating solar energy with energy storage systems, featuring the advantages and disadvantages of the various topologies leading to suggestions for the direction of future research.
365
Topologies and Control Schemes of Bidirectional DC–DC Power Converters: An Overview
TL;DR: The features of each topology and control scheme along with their typical applications are discussed, in order to provide a ground of comparison for realizing new configurations or finding the appropriate converter for the specific application.
References
Power budgeting of a multiple-input buck-boost converter
TL;DR: In this article, the use of a multiple-input buck-boost converter for budgeting power between different energy sources is discussed, and it is shown mathematically that the idealized converter can accommodate arbitrary power commands for each input source while maintaining a prescribed output voltage.
Multiple-input DC-DC power converter for power-flow management in hybrid vehicles
A. Di Napoli,Fabio Crescimbini,Luca Solero,Federico Caricchi,Fabio Giulii Capponi +4 more
- 10 Dec 2002
TL;DR: In this article, a multiple input DC-DC power converter (MI-PEC) is proposed to combine the power flowing from combined on-board energy sources, which includes electric generator, ultracapacitor tank, and battery systems.
Identification of Feasible Topologies for Multiple-Input DC–DC Converters
TL;DR: In this article, the authors studied single-input dc-dc converter topologies that are suitable to be expanded into their multiple-input converter version, based on several assumptions, restrictions, and conditions.