A study of the high performance single-phase UPS

Uematsu, Taro; Ikeda, Taiki; Hirao, N.; Totsuka, S.; Ninomiya, Tamotsu; Kawamoto, H.

doi:10.1109/pesc.1998.703437

Cited by 42 publications

(17 citation statements)

References 3 publications

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“…2) Then, the squared-voltage y d = (x 1,d ) 2 varies, in response to the tuning ratio β, according to the following first-order time-varying linear equation…”

Section: Propositionmentioning

confidence: 99%

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Output‐Feedback Nonlinear Adaptive Control of Single‐Phase Half‐Bridge Ups Systems

Kissaoui

Abouloifa

Abouelmahjoub

et al. 2016

Asian Journal of Control

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We consider the problem of controlling single-phase half-bridge power converters in UPS systems operating in the presence of changing load. The control objective is twofold: (i) ensuring a satisfactory power factor correction (PFC) at the grid-UPS connection; (ii) guaranteeing a tight regulation of the DC bus voltage and the half-bridge inverter output voltage despite changes in load. The considered control problem entails several difficulties including: (i) the high dimension and strong nonlinearity of the system; (ii) the numerous state variables that are inaccessible to measurements; (iii) the uncertainty that prevails on some system parameters. The problem is dealt with using a multi-loop nonlinear adaptive control system that makes use of the backstepping design technique. The inner loop ensures the PFC objective and involves an adaptive observer estimating the grid voltage and impedance parameters. The intermediary loop regulates the inverter output voltage to its reference, which is a sinusoidal wave, and it also contains an observer estimating the current in the inverter coil. The outer loop regulates the DC bus voltage up to small size ripples. The controller performances are formally analyzed using system averaging theory.

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“…2) Then, the squared-voltage y d = (x 1,d ) 2 varies, in response to the tuning ratio β, according to the following first-order time-varying linear equation…”

Section: Propositionmentioning

confidence: 99%

“…The problem at hand is to design a tuning law for β so that the squared voltage y d = (x 1,d ) 2 tracks a given reference signal y…”

Section: Propositionmentioning

confidence: 99%

Output‐Feedback Nonlinear Adaptive Control of Single‐Phase Half‐Bridge Ups Systems

Kissaoui

Abouloifa

Abouelmahjoub

et al. 2016

Asian Journal of Control

View full text Add to dashboard Cite

show abstract

“…3b) can be separately used as rectifier and as inverter, the three-leg converter topology (Fig. 3c) is very attractive in terms of loss, cost and size [3]. A major drawback of this structure is the requirement for storage batteries of very high voltage of some of them connected in series.…”

Section: Operation Schemes For Upsmentioning

confidence: 99%

“…Uninterruptible power supplies (UPSs) are used to supply clean and uninterrupted power to critical loads under any normal or abnormal utility power conditions, including outages from a few milliseconds up to several hours duration [1]- [3], providing protection against power failure or anomalies of power-line voltage [4].…”

Section: Introductionmentioning

confidence: 99%

Single-phase uninterruptible power system topology concepts: Application to an universal active filter

Silva

Santos

Jacobina

et al. 2011

2011 IEEE Energy Conversion Congress and Exposition

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This paper discusses the possible control techniques for UPS and relates these control techniques to the different single-phase UPS topologies found in literature. These possibilities have been mentioned in separate but they have never been put together. Also, techniques for using a low battery voltage are discussed. Finally, a combination of different possibilities of UPS structures and one of the types of operation control is applied to an universal active filter with the function of UPS, with low battery voltage and without any transformer, thus reducing cost and weight. Simulated and experimental results verify the proposed topology.

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“…In Section III a new cell based on a half bridge singlephase rectifier [10], [11] and a three-level single-phase inverter (H-bridge) is presented. The standard control scheme [12], [13] is improved to guarantee a very high input power factor at the primary of the transformer and to prevent voltage imbalance on the capacitors of each cell.…”

mentioning

confidence: 99%

Cascaded Multilevel Inverter With Regeneration Capability and Reduced Number of Switches

Lezana

Rodríguez

Oyarzún

2008

IEEE Trans. Ind. Electron.

207

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Abstract-Multilevel converters are a very interesting alternative for medium and high power drives. One of the more flexible topologies of this type is the cascaded multicell converter. This paper proposes the use of a single-phase reduced cell suitable for cascaded multilevel converters. This cell uses a reduced singlephase active rectifier at the input and an H-bridge inverter at the output side. This topology presents a very good performance, effectively controlling the waveform of the input current and of the output voltage and allowing operation in the motoring and regenerative mode. The results presented in this paper confirm that this medium voltage inverter effectively eliminates low frequency input current harmonics at the primary side of the transformer and operates without problems in regenerative mode.

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A study of the high performance single-phase UPS

Cited by 42 publications

References 3 publications

Output‐Feedback Nonlinear Adaptive Control of Single‐Phase Half‐Bridge Ups Systems

Output‐Feedback Nonlinear Adaptive Control of Single‐Phase Half‐Bridge Ups Systems

Single-phase uninterruptible power system topology concepts: Application to an universal active filter

Cascaded Multilevel Inverter With Regeneration Capability and Reduced Number of Switches

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