Topology of super uninterruptible power supply with multiple energy sources

Shi, Keyan; Li, Haijin; Hu, Changsheng; Xu, Dehong

doi:10.1109/icpe.2015.7168013

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…Unfortunately, renewable sources of the topology proposed in [27] are not able to transfer power to the main grid. A system with multiple sources has been considered in [28], in which overall system reliability has been analysed for different connection scenarios. Furthermore, a configuration is introduced, in which all the input supplies and energy storage devices are connected to a common DC link.…”

Section: Introductionmentioning

confidence: 99%

Power sharing strategy for multi‐source electrical auxiliary power unit with bi‐directional interaction capability

Tashakor

Arabsalmanabadi

Iraji

et al. 2020

IET Power Electronics

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This study presents a hierarchical control strategy for an auxiliary power unit (APU) for aircraft to coordinate multiple power sources and control developed power electronic interfaces. The study benefits from the presence of a hybrid energy system in paralleled structure to the main generator as the complementary system. The employed structure enhances power quality and improves the voltage profile of the high-voltage DC bus. Furthermore, the developed bi-directional topology provides the possibility of interaction with the grid. Considering the APU features in an aircraft, a hierarchical control strategy with different levels of control, timescale, dynamic response, and significance are developed. The developed controller consists of a power management algorithm in the higher level, and local voltage and current controllers in the lower one. The algorithm aims to maximise the PV subsystem utilisation, overcome voltage fluctuations, increase power density, reduce operation costs, and increase system availability while allowing further development to larger systems. Simulation and experimental results confirm the robustness of the algorithm. The result shows that the proposed power sharing strategy optimises the system utilisation while achieving a high-quality voltage profile under severe fluctuations. Moreover, the stress on the battery pack is reduced to improve the life cycle and reduce operation costs.

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Section: Introductionmentioning

confidence: 99%

Power sharing strategy for multi‐source electrical auxiliary power unit with bi‐directional interaction capability

Tashakor

Arabsalmanabadi

Iraji

et al. 2020

IET Power Electronics

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“…Furthermore, four power conversion structures are enumerated and compared in terms of reliability. Shi et al further propose a graphical methodology to deduce possible architectures for multi-source UPS systems, which is based on a simplified component model [11]. Moreover, the deduced architectures in [11], including star, bus, ring, and hybrid structures, are evaluated in terms of reliability.…”

Section: Introductionmentioning

confidence: 99%

“…Shi et al further propose a graphical methodology to deduce possible architectures for multi-source UPS systems, which is based on a simplified component model [11]. Moreover, the deduced architectures in [11], including star, bus, ring, and hybrid structures, are evaluated in terms of reliability. However, there is a lack of rigid mathematical deductions, and the proposed method is a graphical enumeration in essence.…”

Section: Introductionmentioning

confidence: 99%

Systematic approach to construct and assess power electronic conversion architectures using graph theory and its application in a fuel cell system

Zhang

2019

IET Power Electronics

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With the proliferation of renewable energy generations, power conversion systems (PCSs) are becoming much more complex; it is becoming challenging to search all possible power conversion architectures (PCAs) and find the best optimisation in terms of different objectives. Therefore, this study investigates a systematic approach to construct and evaluate PCAs using graph theory. First, the components in PCSs are graphically modelled as either nodes or edges. Then, a generalised PCA deduction methodology is proposed, and all possible PCAs can be mathematically deduced by modifying elements in adjacency matrices. For a fuel cell (FC) generation system, 45 possible PCAs are found with the proposed method. Furthermore, an evaluation methodology based on graph theory is proposed. The performance indices of the deduced PCAs, including costs, efficiency, and reliability, are calculated. Then, an optimisation approach is applied to finding the best architecture compromise, where the one with the shortest distance to the ideal architecture is considered the best architecture compromise. For the FC demo system, with the proposed assessment methodology, the best architecture compromise (dc-bus structure) is found among 45 possible architectures. Finally, the experimental platform, which adopts the dc-bus optimised architecture, is built and experimental results validate the architecture selection.

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“…In the Traditional Normal Mode (TNM) operation of an online UPS system, the load power is provided by the combination of AC/DC rectifier and DC/AC inverter. Recently, several studies have been conducted by integrating fuel cell or multiple energy sources into the UPS system [6][7][8][9], which claims to improve the performance under both normal mode and backup mode of operation. Among these studies, [9] proposed a seamless transfer control strategy for the fuel cell-based UPS system.…”

mentioning

confidence: 99%

“…Among these studies, [9] proposed a seamless transfer control strategy for the fuel cell-based UPS system. [6][7][8] proposed a Super UPS topology, where the fuel cell, Photovoltaic (PV) generation, and gas engine are all integrated into the UPS system. However, incorporating all these energy units into the UPS system inevitably increases the client's economic burden and furthermore, energy management of such a system is quite complicated and challenging.…”

mentioning

confidence: 99%

Multimode Operation for On-Line Uninterruptible Power Supply System

Savaghebi

Golestan

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

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To enhance the robustness and disturbance rejection ability of an on-line uninterruptible power supply (UPS) system, an Internal Model Control (IMC)-based DC-link voltage regulation method is proposed in this paper. Furthermore, the multi-mode operations of the on-line UPS system are investigated and their corresponding control strategies are proposed. The proposed control strategies are capable of achieving the seamless transition in traditional normal mode, PV-aided normal mode, enhanced eco-mode and burn-in test mode. Meanwhile, the uninterruptible load voltage is promised during the mode transition. The small signal analysis is also conducted to investigate the stability of enhanced eco-mode and burn-in test mode. Finally, extensive experimental results are provided to validate the effectiveness of the proposed methods.

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Topology of super uninterruptible power supply with multiple energy sources

Cited by 15 publications

References 13 publications

Power sharing strategy for multi‐source electrical auxiliary power unit with bi‐directional interaction capability

Power sharing strategy for multi‐source electrical auxiliary power unit with bi‐directional interaction capability

Systematic approach to construct and assess power electronic conversion architectures using graph theory and its application in a fuel cell system

Multimode Operation for On-Line Uninterruptible Power Supply System

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