Operation and control of a dynamic voltage restorer using transformer coupled H-bridge converters

Wang, Bingsen; Illindala, Mahesh S.

doi:10.1109/tpel.2006.876836

Cited by 136 publications

(44 citation statements)

References 20 publications

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“…Voltage sags may be caused by switching actions associated with impermanent disconnection of supply, the progression inrush current associated with the commencing of induction motor loads or steady stream of fault currents due to short circuit faults which includes single line to ground fault in a power system (SLG). These kinds of phenomena would probably originate from the customers system or from a public supply network [8,9]. Voltage swells are brief magnifications in root mean square voltage between 1,1 pu and 1,8 pu at the power frequency amounts of time from 0,5 cycles in 1 minute.…”

Section: Introductionmentioning

confidence: 99%

Power quality enhancement in induction motor drives by using custom power device

Manokaran¹

2015

Teh. vjesn.

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Original scientific paper This paper focuses on the advancement of electric power quality tendencies of an induction motor as well as alleviating the consequence on account of the prolonged duration voltage discrepancy and also quite a short time period voltage variance of these kinds of that over voltage, under voltage continuous interruption, impermanent voltage fall together with voltage climb or maybe an entire disappearance of voltage. The proposed alleviating device is a brand new topology of a dynamic voltage restorer (DVR). A DVR is often familiar to alleviating the impact of unusually high voltage variations while making use of a highly effective custom electric power equipment that is to say dynamic voltage restorer. It contains an electric power storage device, filtration systems, voltage source inverters and also injection transformer. There are numerous categories of regulating approaches being employed for mitigation of abnormal voltages. The proposed control approach to DVR will be based upon the 'abc to dqo' conversion methodology employed. The demonstration outcomes can be found in several circumstances of sag, swell and additional harmonic disorder in the supply voltage which exhibits the reimbursement abilities of DVR. The performance of suggested strategy is examined with the aid of computer demonstration through the use of MATLAB/SIMULINK software. Keywords: distribution system; dynamic voltage restorer; power quality; unbalanced and distorted load; voltage sags and swells; voltage source inverter Poboljšanje kvalitete električne energije u pogonima indukcijskih motora uporabom prilagođenog pogonskog uređajaIzvorni znanstveni članak Rad se bavi nastojanjima za poboljšanje kvalitete električne energije indukcijskog motora kao i ublažavanjem posljedica zbog dulje neujednačenosti napona i također kratkog trajanja takvih promjenljivosti napona, stalnih prekida napona, neujednačenog pada i porasta napona ili možda i potpunog nestanka napona. Predloženi uređaj za ublažavanje ovih pojava je sasvim nova topologija dinamičkog obnavljača napona (dynamic voltage restorer (DVR). DVR ublažava djelovanje neuobičajeno velikih promjena napona i koristi visoko učinkovit prilagođen električni uređaj, t.j. dinamički obnavljač napona. Sastoji se od uređaja za akumuliranje električne energije, sustava za filtriranje, pretvarača izvora napona i ispravljača ubrizgavanja. Postoje brojni regulatori za ublažavanje abnormalnih napona. Predloženi pristup DVR-u temeljit će se na primijenjenoj metodologiji konverzije 'abc do dqo'. Primjeri za demonstraciju mogu se naći u nekoliko slučajeva slabljenja, rasta i dodatnog harmonijskog nereda u naponu na kojima se pokazuju mogućnosti DVR-a. Izvršenje predložene strategije ispitano je pomoću demonstracije na računalu uporabom softvera MATLAB/SIMULINK.Ključne riječi: dinamički obnavljač napona; kvaliteta električne energije; neuravnoteženo i izobličeno opterećenje; pad i porast napona; pretvarač izvora napona; sustav raspodjele

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Section: Introductionmentioning

confidence: 99%

Power quality enhancement in induction motor drives by using custom power device

Manokaran¹

2015

Teh. vjesn.

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“…Other experts have done research on topologies and control strategies utilizing low-voltage DVRs with a three-phase three-wire [6] or a three-phase four-wire [7]. High-voltage DVRs with the neutral-point clamped type [8], flying capacitor type [9] or cascaded type [10] have also been studied. Currently, the industrial application of DVRs is mainly in low-voltage.…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization of the LC filters Based on Multiple Impact Factors for Cascaded H-bridge Dynamic Voltage Restorers

Chen¹,

Zhu²,

Cai³

2014

Journal of Power Electronics

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The cascaded H-Bridge Dynamic Voltage Restorer (DVR) is used for protecting high voltage and large capacity loads from voltage sags. The LC filter in the DVR is needed to eliminate switching ripples, which also provides an accurate tracking feature in a certain frequency range. Therefore, the parameter optimization of the LC filter is especially important. In this paper, the value range functions for the inductance and capacitance in LC filters are discussed. Then, parameter variations under different conditions of voltage sags and power factors are analyzed. In addition, an optimized design method is also proposed with the consideration of multiple impact factors. A detailed optimization procedure is presented, and its validity is demonstrated by simulation and experimental results. Both results show that the proposed method can improve the LC filter design for a cascaded H-Bridge DVR and enhance the performance of the whole system.

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“…These disturbances may cause sensitive loads to malfunction or even shut down the entire industrial process, which results in heavy production loss [1]- [3]. One of the major power quality issues is voltage sag caused by the starting of heavy induction motors and short circuit faults [4]- [8]. Voltage sag is a momentary decrease in RMSAC voltage from 0.9p.u.…”

Section: Introductionmentioning

confidence: 99%

“…of the nominal value [7]. Switching large capacitors, the removal of large loads and single phase to ground faults may cause voltage swells [8].…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count

Rahman¹,

Periasamy²,

Arumugam³

2014

Journal of Power Electronics

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A new simplified topology for a dynamic voltage restorer (DVR) based on direct converter with a reduced number of switches is presented. The direct converter is fabricated using only three bi-directional controlled switches. The direct converter is connected between the grid and center-tapped series transformer. The center-tapped series transformer is used to inject the compensating voltage synthesized by the direct converter. The DVR can properly compensate for long-duration, balanced, and unbalanced voltage sag and swell by taking power from the grid. The switches are driven by ordinary pulse width modulation signals. Simulation and hardware results validate the idea that the proposed topology can mitigate sag of 50% and swell of unlimited quantity.

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Operation and control of a dynamic voltage restorer using transformer coupled H-bridge converters

Cited by 136 publications

References 20 publications

Power quality enhancement in induction motor drives by using custom power device

Power quality enhancement in induction motor drives by using custom power device

Parameter Optimization of the LC filters Based on Multiple Impact Factors for Cascaded H-bridge Dynamic Voltage Restorers

Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count

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