Single-Bus and Dual-Bus Architectures of Electrical Power Systems for Small Spacecraft

González-Llorente, Jesús; Lidtke, Aleksander A.; Hurtado, Ronald Ariza; Okuyama, Keiichi

doi:10.5028/jatm.v11.1086

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…As the inductor average voltage V L is considered null along the period T, Equation 25implies in Equation 26, which leads to Equation (27).…”

Section: Maximum Power Point Tracker: Boost Regulatormentioning

confidence: 99%

“…Gonzalez‐Llorente et al 27 propose and compare two EPS architectures named single‐bus and dual‐bus. The single‐bus architecture is proposed for a 3U CubeSat, where two EPS subsystems are adopted but connected in a single‐bus, as shown in Figure 1.…”

Section: State Of the Artmentioning

confidence: 99%

“…Single‐bus and dual‐bus EPS architectures proposed by Gonzalez‐Llorente et al 27 [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: State Of the Artmentioning

confidence: 99%

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Nanosatellite electrical power system architectures: Models, simulations, and tests

Slongo

Martinez

Eiterer

et al. 2020

Circuit Theory & Apps

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KESSLER SLONGO ET AL. power point tracking (MPPT) techniques, high-efficiency solar cells, and energy-aware scheduling algorithms are some of the hot topics under research nowadays. Due to size restrictions and aiming low complexity in design, many nanosatellite designers adopt the direct energy transfer (DET) architecture. KySat-2 is an example of a successfully accomplished mission, based on this EPS topology. Designed by Morehead State University Space Science and Engineering group, KySat-2 EPS was powered by a set of gold-plated deployable solar panels with 26% of efficiency. It provided four high-power regulated rails (two 3.3 V and two 5 V) and a low-noise, low power 3.3V rail for noise-sensitive devices. The energy storage system was made of three 18650 lithium-ion cells connected in series, and the high-power rails reached efficiencies approaching 90%. 12,21 Aiming minimum space occupation and low power consumption, the EPS proposed for the AraMiS project has a boost regulator operating the solar panels close to their MPP. 16 In order to reduce the number of components, the designers opted by the constant voltage MPPT algorithm, using only analog devices. The EPS steps up solar panels voltage from 4.4 V to the distribution bus voltage level (14 ± 2 V). It provides power buses with 3.3 and 5 V voltage levels. The EPS efficiency analysis is demonstrated, calculating the main components power losses. Although this is a very detailed and well-described work, it does not compare the proposed solution with other EPS architectures. A 3U EPS efficiency analysis is presented by Gonzalez-Llorente et al. 22 The subsystem is based on a buck converter that steps down the solar panels voltage (15 or 7.5 V) to the litChium-ion battery range of 3.3 or 6.6 V. The authors define an optimum operation point for the DC-DC converter in order to achieve its maximum efficiency. The operation point is defined by the converter input voltage, output voltage, and output power. Therefore, the discussion is based on different solar cells connections configurations, and battery cells arrangement, that result in the most efficient EPS configuration. Different scenarios have been analyzed to achieve 98% of peak efficiency on the best configuration: input voltage of 7.4 V, output voltage of 3.3 V, and output current varying from 0.1 mA to 2.1 A. Only the buck converter topology is discussed in this paper, and it does not consider any MPPT technique. An interesting solution adopted for the ERPSAT-1 picosatellite uses fuzzy logic to obtain energy harvesting maximization. 23 The developed subsystem has three main blocks, which are the fuzzy maximum power point tracker, the power conditioner, and the hierarchical fuzzy subsystem controller. The fuzzy logic algorithm has been implemented in a dedicated microcontroller that controls a boost converter. Simulations have been performed to demonstrate the better efficiency of the proposed method when compared to the Perturb and Observe MPPT algorithm. Although a comparison is provided in this work,...

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“…As the inductor average voltage V L is considered null along the period T, Equation 25implies in Equation 26, which leads to Equation (27).…”

Section: Maximum Power Point Tracker: Boost Regulatormentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

See 1 more Smart Citation

Nanosatellite electrical power system architectures: Models, simulations, and tests

Slongo

Martinez

Eiterer

et al. 2020

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Since these secondary power systems require a management system for energy storage, but when the sunlight is brighter, PVs collect more power and excessive voltage can damage the batteries. Hence, in the EPS, the Battery Charger Regulation (BCR) block, which is responsible for implementing a Constant Voltage (CV) charging strategy, should be used to prevent the battery failure in order to prevent the battery from overcharging when it is already fully charged [36]. In [37], the design of a Buck-Boost converter with a PI controller is used in order to combine both hybrid power sources PV/Wind with a battery storage system.…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Seddjar,

Kerrouche,

Wang

2020

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One of the most critical systems of any satellite is the Electrical Power System (EPS) and without any available energy, the satellite would simply stop to function. Therefore, the presented research within this paper investigates the areas relating to the satellite EPS with the main focus towards the CubeSat platform. In this paper, an appropriate EPS architecture with the suitable control policy for CubeSat missions is proposed. The suggested control strategy combines two methods, the Maximum Power Point Tracking (MPPT) and the Battery Charge Regulation (BCR), in one power converter circuit, in order to extract the maximum power of the Photovoltaic (PV) system and regulate the battery voltage from overcharging. This proposed combined control technique is using a Fuzzy Logic Control (FLC) strategy serving two main purposes, the MPPT and BCR. Without an additional battery charger circuit and without switching technique between the two controllers, there are no switching losses and the efficiency of the charging characteristic can be increased by selecting this proposed combined FLC. By testing a space-based PV model with the proposed EPS architecture, some simulation results are compared to demonstrate the superiority of the proposed control strategy over the conventional strategies such as Perturb and Observe (P&O) and FLC with a Proportional Integral Derivative (PID) controller.

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