A UPS With 110-V/220-V Input Voltage and High-Frequency Transformer Isolation

Torrico-Bascope, Rene P.; OliveiraJr., Demercil S.; Branco, G.C.; Antunes, Fernando Luiz Marcelo

doi:10.1109/tie.2008.918480

Cited by 59 publications

(17 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…where Re is the emulative resistance of the converter. Equation (9) shows that the inductor peak current is not very high because large value of inductor is selected which maintains the continuous conduction.…”

Section: Boost Convertermentioning

confidence: 99%

“…However, due to high dc-link voltage, several batteries are connected in a series arrangement, which reduces the reliability of the system. [9] 2 kVA 220 108 9 [10] 150 VA 120 48 4 [11] 2 kVA 110 180 15 [12] 3.3 kVA 220 120 10 Table 1 shows a comparison of the different high-frequency transformer-based UPS with series connected batteries. Series battery arrangement has major drawbacks and limitations in charging and discharging.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

et al. 2017

View full text Add to dashboard Cite

Uninterruptible power supplies (UPSs) are widely used to deliver reliable and high quality power to critical loads under all grid conditions. This paper proposes a high-frequency isolated online UPS system for low power applications. The proposed UPS consists of a single-stage AC-DC converter, boost DC-DC converter, and an inverter. The single-stage AC-DC converter provides galvanic isolation, input power factor correction, and continuous conduction of both input and output current. The low battery bank voltage is stepped up to high dc-link voltage by employing a high voltage gain boost converter, thus allows the reduction of battery bank to only 24 V parallel connected batteries. Operating batteries in parallel improves the battery performance and resolves the issues related to conventional battery banks that arrange the batteries in series combination. The inverter provides regulated output voltage to the load. A new cascaded slide mode (SM) and proportional-resonant (PR) control for the inverter has been proposed, which regulates the output voltage for both linear and non-linear loads. The controller shows excellent performance during load transients and step changes. Besides, the controller for boost converter and AC-DC converter is presented. Operating principle and experimental results of 1 kVA laboratory setup have been presented for the validation of proposed system.

show abstract

Section: Boost Convertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

et al. 2017

View full text Add to dashboard Cite

show abstract

“…For this reason, it is presented a bibliographic review about others topologies isolated in high-frequency, which are described following: in [4][5][6][7], UPS topologies with highfrequency isolation are suitable to process power higher than 2kVA, where more than 12 batteries are used. Due to the number of batteries in series, a low-power system (≤ 2kVA) becomes very expensive using such topologies.…”

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)

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…The concept of using flywheels to store energy has been applied with some amount of success, typically, in wind power generation, automotive, and aerospace applications 0-13]. However, the application of this energy storage method to enhance power system stability is just beginning to be studied [0][1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A Novel Energy Storage System based on Flywheel for Improving Power System Stability

Wu¹,

Wen²,

Cheng³

2011

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-In this paper, a novel flywheel energy storage device, called the flexible power conditioner, which integrates both the characteristics of the flywheel energy storage and the doubly-fed induction machine, is proposed to improve power system stability. A prototype is developed and its principle, composition, and design are described in detail. The control system is investigated and the operating characteristics are analyzed. The test results based on the prototype are presented and evaluated. The test results illustrate that the prototype meets the design requirement on power regulation and starting, and provides a cost-effective and effective means to improve power system stability.

show abstract

A UPS With 110-V/220-V Input Voltage and High-Frequency Transformer Isolation

Cited by 59 publications

References 12 publications

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

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

A Novel Energy Storage System based on Flywheel for Improving Power System Stability

Contact Info

Product

Resources

About