A Transformer Inrush Mitigation Method for Series Voltage Sag Compensators

Cheng, Po-Tai; Chen, Wei‐Ting; Chen, Yu-Hsing; Ni, Chia-Long; Lin, Jarsun

doi:10.1109/tpel.2007.904186

Cited by 30 publications

(19 citation statements)

References 19 publications

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“…Based on their configuration and operating principle, UPS systems are categorized into three major types: 1) offline, 2) line-interactive, and 3) on-line [3,4]. Compared to the other types, an on-line UPS is more commonly used in extremely sensitive load applications because of its greater reliability and higher output power quality.…”

Section: Introductionmentioning

confidence: 99%

“…Another method is to gradually increase the output voltage of the UPS system. But that can disturb a load transformer that is already on-line [4]. Actively regulating the transformer flux is the most recently adopted technique.…”

Section: Introductionmentioning

confidence: 99%

“…Actively regulating the transformer flux is the most recently adopted technique. However, it involves complex control algorithms [2,3,4,5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

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A single-phase on-line UPS system for multiple load transformers

Bukhari

Kwon

2017

IEICE Electron. Express

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Numerous loads require the installation of load transformers for electrical isolation or voltage matching. When these loads are powered by a single-phase on-line UPS system, a high magnitude of transient inrush current is often observed due to the energizing of the load transformer. In this paper, we propose a novel single-phase on-line UPS system that eliminates the generation of inrush current while powering multiple load transformers. The performance of the proposed single-phase UPS system is endorsed by our experimental results obtained using a small laboratory-sized prototype. Keywords: on-line UPS system, multiple load transformers, inrush current, current-controlled inverter Classification: Circuits and modules for electronic instrumentation References[1] C.-M. Lai: "A battery-powered single-stage three-phase high step-up converter topology for micro DC-UPS," IEICE Electron. Express 11

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A single-phase on-line UPS system for multiple load transformers

Bukhari

Kwon

2017

IEICE Electron. Express

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“…Because UPS systems are intended to automatically deliver backup power to critical loads, an off-line UPS system takes over the load completely within a quarter cycle whenever a disturbance occurs on the utility. The transference time of load depends on several factors including the time of the fault detection and the maneuver of switches [3,4]. Although this span of time does not disrupt majority of the applications, it can cause severe problems by generating a large-magnitude inrush current for the transformer-coupled sensitive loads [5].…”

Section: Introductionmentioning

confidence: 99%

A three-phase off-line UPS system for transformer coupled loads

Bukhari

Ayub

Atiq

2017

IEICE Electron. Express

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A number of critical load applications depend on a UPS system to uphold the normal operation. As soon as any disruption happens on the utility, an off-line UPS system starts supplying the power to the load to prevent blackout. Nonetheless, during this process, a substantial inrush current can be observed for the transformer-coupled loads. To avoid this inrush current, we propose an off-line UPS system based on a current regulated voltage source inverter. The inverter of the proposed UPS system uses a current control scheme executed in a stationary frame to regulate the load current and eliminates the likelihood of the inrush current. To endorse the performance of the proposed UPS system, we constructed a small prototype to obtain the experimental results.

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“…Therefore, an ideal FCL should have another important characteristic in addition to listed characteristics. It should play the load impedance role and be equal to load impedance during fault to better operation in such performances [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Parallel-Resonance-Type Fault Current Limiter

Naderi

Jafari

Hagh

2013

IEEE Trans. Ind. Electron.

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Abstract─This paper proposes a new parallel LC resonance type fault current limiter (FCL) that uses a resistor in series with the capacitor. The proposed FCL is capable to limit fault current magnitude near to pre-fault magnitude of distribution feeder current by placing the mentioned resistor in the structure of FCL. In this way, voltage of point of common coupling (PCC) does not experience considerable sag during the fault. In addition, the proposed FCL does not use superconducting inductor which has high construction cost. Analytical analysis for this structure is presented in detail and simulation results using PSCAD/EMTDC software are obtained to validate the effectiveness of this structure. Also, an experimental setup is provided to show the accuracy of analytic analyses and simulation results.

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A Transformer Inrush Mitigation Method for Series Voltage Sag Compensators

Cited by 30 publications

References 19 publications

A single-phase on-line UPS system for multiple load transformers

A single-phase on-line UPS system for multiple load transformers

A three-phase off-line UPS system for transformer coupled loads

Parallel-Resonance-Type Fault Current Limiter

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