Voltage sag/swell compensation using Z-Source inverter based dynamic voltage restorer

Rani, P. Usha; Rajkumar, M.; Reddy, S. Rama

doi:10.1109/icetect.2011.5760127

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…The literature referred to in [12][13][14][15][16] discusses using Z-source and Quasi-Z-source converters to achieve dynamic voltage restoration. The z-source network can produce the desired output voltage, which is greater or lesser than the line voltage.…”

Section: Introductionmentioning

confidence: 99%

Compensation of Voltage Sags and Swells Using Dynamic Voltage Restorer Based on Bi-Directional H-Bridge AC/AC Converter

Qiu

Song

2021

Processes

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In this paper, the compensation of voltage sags and swells using a dynamic voltage restorer (DVR) based on a bi-directional AC/AC converter is presented for stabilizing single-phase AC line voltage. The H-bridge AC/AC converter with bi-directional switches and without bulk capacitor is adopted as the power topology of the proposed system. The proposed novel topology of DVR is adopted to compensate both voltage sag and swell conditions. Additionally, the power factor is closed to unity because a bulk capacitor is not required. The inner and outer loop control is proposed to improve the response with gain scaling; gain control is adopted to reduce the overshoot. Finally, a 2 kVA prototype has been implemented to verify the performance and accuracy of the control method for the DVR system. The peak efficiency of the system is up to 94%, and it can compensate 50% voltage swells and 25% voltage sags.

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Section: Introductionmentioning

confidence: 99%

Compensation of Voltage Sags and Swells Using Dynamic Voltage Restorer Based on Bi-Directional H-Bridge AC/AC Converter

Qiu

Song

2021

Processes

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“…Electrical isolation has its own countless benefits, together with the impedance source converter makes it the best option in DVR applications [23]. The dynamic voltage restorer (DVR) with its exceptional dynamic abilities, when installed between the supply and the critical load, can compensate the voltage sags and swells with in few moments and therefore preventing the power disruption to the load.…”

Section: Introductionmentioning

confidence: 99%

A high frequency isolated single-phase impedance-source ac-ac converter

Ahmed

Aleem

Cha

et al. 2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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This paper deals with a new family of single-phase impedance source ac-ac converters which employs a high frequency transformer between the impedance source network and the load. The proposed structure have unique features: providing a wide range of output ac voltage with buck-boost, maintaining or reversing the phase angle, and reduced inrush and harmonic current component. In addition to the aforementioned benefits the proposed converter incorporates a high frequency transformer which provides isolation between input and output, and removes the need for bulky 60 Hz low frequency transformer which improves the efficiency of the converter in terms of size, weight and cost of the transformer. Moreover, high frequency transformer can also be utilized in adjusting the gain of the converter. An experimental prototype of proposed converter is built and tested to prove its performance and effectiveness.Index Terms Z-Source converter, electrical isolation, buckboost capability, reversing or maintaining phase angle.

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“…Among these arise the electronic solutions already available in market. As typical examples it can be recognize the existence of equipment such as the: DVR [3], Statcom [4], Sipcon, Power Conditioners [5], etc. These products have emerged as means to restore voltage deviation to the admissible range with a very short response time.…”

Section: Introductionmentioning

confidence: 99%

Computational Performance Analysis of an Electromagnetic Dynamic Voltage Restorer: Physical Conception and Operational Approaches

Silva¹,

Santilicio²,

Vasconcelos³

et al. 2013

REPQJ

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The present paper focuses an electromagnetic device to restore busbar voltages to acceptable limits using an electromagnetic arrangement conception. The new device has been called by electromagnetic dynamic voltage restorer (EDVR) due to its physical structure. As for the insertion of the degree of the series voltage compensation, two approaches are considered. The first can be recognized as a discrete procedure as the restoring voltage procedure makes use of electronically switched tap changers. The second relies on a continuous voltage variation offered by a single tap supply and a controllable electronic device. It is shown that the overall compensator idea lies on positive or negative insertion of a variable voltage in series with de feeder so as to achieve a consumer supply voltage in accordance with acceptable levels. The device comprises a traditional shunt autotransformer linked to a series transformer which provides the necessary restoring property. The paper highlights the EDVR physical structure, the control units, the ATP platform models and results associated to case studies to show the overall compensation equipment and control performance offered by the given solutions.

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Voltage sag/swell compensation using Z-Source inverter based dynamic voltage restorer

Cited by 11 publications

References 10 publications

Compensation of Voltage Sags and Swells Using Dynamic Voltage Restorer Based on Bi-Directional H-Bridge AC/AC Converter

Compensation of Voltage Sags and Swells Using Dynamic Voltage Restorer Based on Bi-Directional H-Bridge AC/AC Converter

A high frequency isolated single-phase impedance-source ac-ac converter

Computational Performance Analysis of an Electromagnetic Dynamic Voltage Restorer: Physical Conception and Operational Approaches

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