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Keywords = sequential switch shunt regulator

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17 pages, 4320 KB  
Article
Fast Arc Detection Technology Based on Fractal Dimension for SADA Slip Ring in Satellite Power System
by Yanchen Meng, Enchao Zhang, Donglai Zhang, Xueli Zhu, Hongyu Zhu and Anshou Li
Energies 2024, 17(5), 1093; https://doi.org/10.3390/en17051093 - 25 Feb 2024
Cited by 1 | Viewed by 1857
Abstract
The solar array drive assembly (SADA) slip ring is a critical link that provides electrical power and electric signal transmission between solar arrays and satellite power systems, which is prone to arc faults in the space environment. If these arc faults cannot be [...] Read more.
The solar array drive assembly (SADA) slip ring is a critical link that provides electrical power and electric signal transmission between solar arrays and satellite power systems, which is prone to arc faults in the space environment. If these arc faults cannot be detected and eliminated quickly enough, they will seriously threaten the safety of the satellite power system and the satellite. In this paper, a fast arc detection method based on fractal dimension is proposed that adapts to different operating modes of power systems. The detection method collects the current differential signal data flowing through the SADA slip ring, and, according to the trend of the fractal dimension change in this signal, the fault identification algorithm is designed for different operating modes of the power system to achieve real-time and rapid identification of arc faults. Finally, the effectiveness of the proposed method is demonstrated using test data under several different fault conditions. Full article
(This article belongs to the Special Issue Power Electronics Technologies for Aerospace Applications)
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23 pages, 13366 KB  
Article
Modeling and Analysis of Non-Linear Phenomena of Satellite Power System in Space Environment and Hazard-Risk Evaluations
by Yanchen Meng, Donglai Zhang, Chao Wang, Zhigang Liu, Liying Zhu and Anshou Li
Electronics 2022, 11(11), 1756; https://doi.org/10.3390/electronics11111756 - 31 May 2022
Cited by 2 | Viewed by 2942
Abstract
With the aim to solve the problem of the non-linear phenomenon of the satellite power system under the influence of the space environment factors, which threatens the stability of the power system, in this paper, the abnormal charging and discharging of solar arrays [...] Read more.
With the aim to solve the problem of the non-linear phenomenon of the satellite power system under the influence of the space environment factors, which threatens the stability of the power system, in this paper, the abnormal charging and discharging of solar arrays and solar array drive assembly (SADA) induced by the space plasma environment and accidental events, such as debris impact, and the non-linear behaviors of the solar array and load during the Earth eclipse are modeled and analyzed. On this basis, the hazard risk evaluations of the above non-linear phenomena are carried out, and the weak links of the satellite power system in the space environment are identified. The results show that the unexpected energy of the solar array will increase the current stress and power loss of the power device, resulting in S3R over-regulation. An SADA arc fault will reduce the power supply capacity of the solar array, damage the shunt regulator, and affect the quality of the bus. The non-linear behavior of the solar array and load during the Earth eclipse may damage the battery charge and discharge regulator, seriously affecting the stability of the power system. Full article
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20 pages, 5605 KB  
Review
Power Bus Management Techniques for Space Missions in Low Earth Orbit
by Luigi Schirone, Matteo Ferrara, Pierpaolo Granello, Claudio Paris and Filippo Pellitteri
Energies 2021, 14(23), 7932; https://doi.org/10.3390/en14237932 - 26 Nov 2021
Cited by 14 | Viewed by 5222
Abstract
In space vehicles, the typical configurations for the Solar Array Power Regulators in charge of managing power transfer from the solar array to the power bus are quite different from the corresponding devices in use for terrestrial applications. A thorough analysis is reported [...] Read more.
In space vehicles, the typical configurations for the Solar Array Power Regulators in charge of managing power transfer from the solar array to the power bus are quite different from the corresponding devices in use for terrestrial applications. A thorough analysis is reported for the most popular approaches, namely Sequential Switching Shunt Regulation and parallel-input Pulse Width Modulated converters with Maximum Power Point Tracking. Their performance is compared with reference to a typical mission in low Earth orbit, highlighting the respective strengths and weaknesses. A novel solar array managing technique, the Sequential Maximum Power Tracking, is also introduced in the trade-off and was demonstrated able to boost energy harvesting, especially in the presence of mismatching in the solar array. It also can achieve top levels of reliability using a rather simple control hardware. Its operation was verified both by a Matlab–Simulink model and by an experimental breadboard. Full article
(This article belongs to the Topic Application of Innovative Power Electronic Technologies)
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13 pages, 6056 KB  
Article
Sequential Switching Shunt Regulator Parallel Power Processing Control for High Capacitance Solar Arrays
by José M. Blanes, José A. Carrasco, Ausiàs Garrigós, David Marroquí and Cristian Torres
Energies 2021, 14(2), 429; https://doi.org/10.3390/en14020429 - 14 Jan 2021
Cited by 6 | Viewed by 3580
Abstract
This paper presents a new control strategy for reducing the switching losses produced by the use of high parasitic capacitance solar arrays in the sequential switching shunt regulator. Instead of dividing the solar array into equal sections, the proposed strategy is based on [...] Read more.
This paper presents a new control strategy for reducing the switching losses produced by the use of high parasitic capacitance solar arrays in the sequential switching shunt regulator. Instead of dividing the solar array into equal sections, the proposed strategy is based on two different sections types, low-capacitance and high-capacitance ones. In order to reduce the switching losses and to maintain the original closed-loop response, a novel parallel power processing control strategy is implemented. With this new technique the low-capacitance sections are the only ones that switch at high frequency to regulate the bus while the high-capacitance sections are only connected or disconnected under high load power changes. In addition, the control closed loop delay associated to the time needed to charge the parasitic capacitance has been modelled and a controller modification is proposed to reduce AC performance degradation. Full article
(This article belongs to the Special Issue Advanced Space Power Systems)
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