Design Considerations of Sequential Switching Shunt Regulator for High-Power Applications

Zhu, Haijiang; Zhang, Donglai

doi:10.1109/tie.2019.2956403

Cited by 22 publications

(11 citation statements)

References 15 publications

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“…In switching mode, the SR switches between the bus feeding mode and shunt mode, thus modulating the power delivered to the bus, and the working point of SA switches between the two points correspondingly. The operating mode of each section's SR is determined by the mean value of the payload power demand [33]. In steady-state conditions, it is generally ensured that only one shunt regulator operates in switching mode while the others remain in bus feeding mode or shunt mode.…”

Section: Satellite Power Systemmentioning

confidence: 99%

Fast Arc Detection Technology Based on Fractal Dimension for SADA Slip Ring in Satellite Power System

Meng,

Zhang,

Zhang

et al. 2024

Energies

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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.

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Section: Satellite Power Systemmentioning

confidence: 99%

Fast Arc Detection Technology Based on Fractal Dimension for SADA Slip Ring in Satellite Power System

Meng,

Zhang,

Zhang

et al. 2024

Energies

Self Cite

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“…The parasitic capacitance effect can be modeled as a delay in the control signal. As suggested in [3], to model the delay, the Padé second order approximation is used, see Equation (14).…”

Section: Shunt Transistor Turn-on Delay Modelingmentioning

confidence: 99%

“…To date, the most used SAR subsystem is the sequential switching shunt regulator (S 3 R) due to its high efficiency, low mass, simplicity and high reliability [2,3]. In Figure 2, a simplified S 3 R schematic diagram is presented; as can be seen, the solar array is divided into n equal sections and each one is connected to a shunt regulator so the section can be short-circuited or connected to the bus.…”

Section: Introductionmentioning

confidence: 99%

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Sequential Switching Shunt Regulator Parallel Power Processing Control for High Capacitance Solar Arrays

et al. 2021

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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.

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“…Since the 1970s the most widely used approach for spacecraft power conditioning has been Sequential Switching Shunt Regulation (S 3 R) [2], because of its high power density, modularity, simplicity, and inherently high reliability. Such shunt regulators also provide high power-path efficiency [3,4], as a solar array is split into sections that can be either directly connected-to or disconnected-from the power bus, as happens in the other regulation schemes belonging to the wider family of Direct Energy Transfer (DET) regulators: the Sequential Switching Shunt Series Regulator (S 4 R) [5], the Astrobus™ [6], the shunt module developed for the Galileo Power Conversion and Distribution Unit (PCDU) [7], and the Sequential Switching Shunt Maximum Power Point Regulator (S3MPPR) [8].…”

Section: Introductionmentioning

confidence: 99%

Power Bus Management Techniques for Space Missions in Low Earth Orbit

et al. 2021

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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.

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Design Considerations of Sequential Switching Shunt Regulator for High-Power Applications

Cited by 22 publications

References 15 publications

Fast Arc Detection Technology Based on Fractal Dimension for SADA Slip Ring in Satellite Power System

Fast Arc Detection Technology Based on Fractal Dimension for SADA Slip Ring in Satellite Power System

Sequential Switching Shunt Regulator Parallel Power Processing Control for High Capacitance Solar Arrays

Power Bus Management Techniques for Space Missions in Low Earth Orbit

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