Multiple port DC DC converter for spacecraft Power Conditioning Unit

Abstract

In a satellite, the main function of a Power Conditioning Unit (PCU) is to manage the energy coming from several power sources (usually solar arrays and battery) and to deliver it continuously to the users in an appropriate form during the overall mission. The objective of this paper is to present an electronic switching DC-DC converter called BuckBuck-Boost Regulator (B³R) that could be used as a modular and recurrent solution for regulated satellite power bus classes. The power conversion stages of the B³R topology are first described. Then theoretical equations and practical tests illustrate how the converter operates in term of power conversion, control loops performances and efficiency. The paper finally provides some examples of single point failure tolerant implementation using the B³R.

DC microgrids and distribution systems: An overview

“…Whereas, the Russian system is divided into two voltage levels; 120 V and 28 V components, and it has 29 kW solar power modules. The two systems are linked with bi-directional DC-DC converters to enable power transfer [137,138].…”

Three-Port DC/DC Converter With All Ports Current Ripple Cancellation Using Integrated Magnetic Technique

“…Assuming voltage of all three ports and capacitor C1 constant, the voltage stress of Q1, D1, Q2 and Q3 can be given by (18) according to Fig. 3.…”

“…But the number of power devices reaches to six and current of the port is discontinuous, leading to bulky port filters; also the inherent disadvantage of traditional boost deteriorates dynamic performance of the proposed converter. In [18], a multiple ports DC/DC converter has been proposed for satellite's regulated power bus. The converter is with high power density by sharing some common power devices, and merits modularity performance by using current control.…”

A Battery Energy Storage System Assisted EV Charger Based on a Three Port DCDC Converter

“…Multi-port dc-dc converters [2][3] are useful in the applications such as renewable energy power generation, EV charging, power supplies and so on. The research of multi-port converters mainly focuses on three-port converters, which can be divided into two categories: isolated [4][5][6] and non-isolated [7][8][9][10] . Nonisolated topology not only connects all the power and load but also adjusts the flow of energy between the power and load more directly, so as to makes the whole system simpler and more compact.…”

“…The converter adopts a completely symmetrical non-isolated structure which ensures the energy can flow freely among three ports, and it has the advantages of simple structure, flexible control, small volume, and large voltage variation range. Compared with the existing topologies proposed in the literatures of [7][8][9][10], this topology can realize more diversified power flow modes and truly adapt to the charging requirements of EVs.…”