A High-Performance Online Uninterruptible Power Supply (UPS) System Based on Multitask Decomposition

Lin, Qiongbin; Cai, Fenghuang; Wu, Wei; Chen, Sixiong; Zhang, Zhe; You, Shi

doi:10.1109/tia.2019.2935929

Cited by 23 publications

(7 citation statements)

References 32 publications

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“…Then, ( 6) can be linearized, and set ( Ūr (t), īC (t), Ūo (t)) as the static working point of boost, which consists of the DC component (U r , i C , U o ) and the AC small signal component ( Ũr (t), ĩC (t), Ũo (t)), these mathematical descriptions are shown in (7).…”

Section: The Boost Circuitmentioning

confidence: 99%

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A Low Voltage Single Phase Online Uninterruptible Power Supply System Based on APFC and Fuzzy PID Algorithm

Wang

et al. 2021

IEEE Access

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The Uninterruptible Power Supply (UPS) is a kind of power supply with electric energy storage, but most UPS systems bring harmonic pollution to the grid, and the power factor is inaccurate in the boost circuit, the output voltage is unstable. Therefore, an active power factor correction circuit (APFC) based on the current and voltage double closed-loop structure is designed in the boost circuit; besides, the fuzzy PID control algorithm is also proposed in the inverter circuit. The effectiveness of the proposed method can be verified by the computer simulation and real experiments, and there are four main results as follows. Firstly, the actual power factor of the UPS system can reach more than 0.996 with APFC correction circuit; then, the UPS system has the strong robustness and the shorter response time; in addition, the voltage regulation rate of the system remains at 0.083% and the load regulation rate is around 0.056%. Finally, the designed UPS system can provide the stable 36V ± 0.2V (50 ± 0.2Hz) AC power.

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Section: The Boost Circuitmentioning

confidence: 99%

“…The inverter generates the AC power by converting DC power. The isolation transformer can be used to isolate the interference of the grid, and its primary and secondary sides are completely insulated to prevent the input voltage drop, filter out the harmonic at the load-end, and improve the power supply quality [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Low Voltage Single Phase Online Uninterruptible Power Supply System Based on APFC and Fuzzy PID Algorithm

Wang

et al. 2021

IEEE Access

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“…The proposed converter does not require a step-up transformer and is well suited for DC generation systems with low input levels. [2], discusses a new three-level uninterruptible power supply (UPS), which uses a push-pull boost circuit to interface with the battery bank and the DC bus. Compactness in its future implementation, another topology based on the Cuk-derived buck-boost method presented in [3].…”

Section: Introductionmentioning

confidence: 99%

A New Non-Isolated Active Quasi Z-Source Multilevel Inverter With High Gain Boost

Naderi

Rastegar

2023

IEEE Access

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This paper proposes a three-level diode clamped active impedance source (AIS-TLI) inverter based on the quasi Z-source inverter (qZSI). Apart from having minimal components and the inherent benefits of three-level qZSIs, such as single-stage buck-boost capability, shoot-through (ST) immunity, and continuity of input current, the proposed topology has a higher boost capability and excellent efficiency. In addition, the inverter bridge has a higher modulation index, which improves the quality of the output waveform and necessitates less inductance. The proposed topology provides common ground between input and output terminals, which effectively eliminates leakage current in PV-powered single-phase systems. This paper describes the different operating modes principle, dynamic analysis, steady-state analysis, and parameter selection instructions for the proposed in-depth. Furthermore, the suggested inverter's benefits and limitations are compared to the traditional (q)ZSIs and some other AIS-TLIs. Finally, modeling and experimental results are used to confirm the effectiveness of the suggested topology.

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“…In the event of an AC grid failure, the system immediately switches to backup mode [ 16 , 17 ]. With the AC–DC input stage, there is the possibility of the implementing power factor correction [ 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Modulation Techniques on the Losses and Thermal Limits of Uninterruptible Power Supply Systems

et al. 2022

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This paper presents a comparative analysis of electrical losses and subsequent thermal limits of the inverter of UPSs for small office and home office (SOHO) applications. For this, three PWM modulation techniques applied to the full-bridge converter are considered, with power levels of 100–1000 W and switching frequencies of 30–120 kHz. To validate the electrical and thermal models, a dSapce MicroLabBox equipment was used to implement modulation techniques on a commercial 1000 W UPS, and a Keysight DAQ970A data logger was used for temperature measurements. As a result, the MOSFET temperatures and losses are obtained for the three modulation techniques evaluated, indicating the best scenario for use and its influence on the UPS autonomy time.

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A High-Performance Online Uninterruptible Power Supply (UPS) System Based on Multitask Decomposition

Cited by 23 publications

References 32 publications

A Low Voltage Single Phase Online Uninterruptible Power Supply System Based on APFC and Fuzzy PID Algorithm

A Low Voltage Single Phase Online Uninterruptible Power Supply System Based on APFC and Fuzzy PID Algorithm

A New Non-Isolated Active Quasi Z-Source Multilevel Inverter With High Gain Boost

Comparative Analysis of Modulation Techniques on the Losses and Thermal Limits of Uninterruptible Power Supply Systems

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