A novel uninterruptible power supply system with active power factor correction

Vázquez, N.; Aguilar, C.; Arau, J.; Cáceres, Ramón; Barbi, I.; Álvarez, Joaquín

doi:10.1109/tpel.2002.1004248

Cited by 58 publications

(15 citation statements)

References 10 publications

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“…In [4] and [5], a kind of poor power factor UPS structure is proposed using rectifier and battery as the DC source of the UPS while a PFC is chosen to form the DC side in order to enhance UPS power factor performance in [6] and [7]. For the sake of smaller current and voltage stress and multi-output N functionality, structures based on dual active bridge (DAB) converter are presented in [8] and [9]. Compared with the aforementioned structures, modular parallel online UPS systems are receiving more and more attention due to their high flexibility [10].…”

Section: Nomenclature K Pv_secmentioning

confidence: 99%

Modular Online Uninterruptible Power System Plug‘n’Play Control and Stability Analysis

Zhang

Coelho

Guerrero

et al. 2016

IEEE Trans. Ind. Electron.

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Abstract-in this paper, a plug'n'play control strategy proposed for modular online UPS system is presented, which allows to plug the UPS modules in or out randomly. This provides a lower difficulty for the maintenance of the whole system. A two level control scheme was proposed, including local controllers to achieve active and reactive power sharing and central controllers to maintain synchronization capability, which allows the online UPS modular system having faster dynamic performance according to the standard IEC 62040-3. A detailed small signal mathematical model was developed in order to analyze the proposed modular online UPS system. Experimental results and data are presented to validate the stability analysis and support the proposed plug'n'play control feasibility.Index Terms-modular online UPS system, phase control, stability analysis. NOMENCLATURE

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Section: Nomenclature K Pv_secmentioning

confidence: 99%

Modular Online Uninterruptible Power System Plug‘n’Play Control and Stability Analysis

Zhang

Coelho

Guerrero

et al. 2016

IEEE Trans. Ind. Electron.

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“…Due to the number of batteries in series, a low-power system (≤ 2kVA) becomes very expensive using such topologies. To overcome this drawback, topological arrangements have been made as presented in [8][9][10][11][12], whose circuits are shown in Fig.1 and their features are described in references.…”

Section: Introductionmentioning

confidence: 99%

“…The main idea is to replace the UPS isolated at lowfrequency currently used in the industry. [8], (b) [9], (c) [10], (d) [11], and (e) [12].…”

Section: Introductionmentioning

confidence: 99%

A 110V/220V grid voltage on-line UPS based on High Frequency isolated four-port circuit

Apolinario

Torrico-Bascope

Daher

2015

2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC)

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This paper presents a double conversion Uninterruptible Power Supply (UPS) system with input voltage equal to 110Vac/220Vac and 24Vdc battery-set. To attend these features, a four-port circuit based on High-Frequency Transformer (HFT) isolated is employed, which consists in two input ports (grid side and battery source side) and two output ports (inverter side and battery-charger side). This topology is suitable for on-line single-phase UPS systems with limited range of power applications (≤ 2kVA). Due competitive market, an opportunity to develop a new UPS with highfrequency isolation and low cost is very attractive to replace the old UPS systems isolated in low-frequency, heavy and bulky. The principle of operation and simulation results, for Vi=110Vac/220Vac; Vb=24Vdc; Vo=110Vac; So=1000VA e fo=60 Hz, are presented.

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“…Boost inverter is an inverter whose ac output power is greater than power input. Several boost inverters and their deferent control methods have been previously proposed [8][9][10][11][12][13][14][15][16]. Sliding mode (SM) controllers are well recognized by their vigor and reliability in controlling boost inverters.…”

mentioning

confidence: 99%

“…Sliding mode (SM) controllers are well recognized by their vigor and reliability in controlling boost inverters. Some of the formerly anticipated SM controllers are dependent on hysteretic modulation [8][9][10][11][12][13][14][15][16]. Meanwhile in [10] where sliding mode was used to control boost inverter, it achieved a little bit steady output results but has some demerits such as complex theory, low variable switching frequencies, lack of an inductance averaged current control and constraints to controller parameter selection.…”

mentioning

confidence: 99%