2018
DOI: 10.1049/iet-pel.2018.5396
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Transformer‐less dynamic voltage restorer based on a three‐leg ac/ac converter

Abstract: A transformer-less dynamic voltage restorer (DVR) with bipolar voltage gain capability is proposed in this study. The DVR is formed by a three-leg ac/ac converter with its output capacitor in series with the transmission line. Since the energy used for voltage compensation is obtained from the grid, long-time voltage disturbances can be compensated without using bulky energy storage elements. As a result, the proposed DVR has the features of compact structure, light weight, and low cost. Moreover, it also has … Show more

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Cited by 23 publications
(17 citation statements)
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“…Substitute the Equations (6) and 7into (8), then Taking the classical presag compensation strategy of DVR as an example, the corresponding conditions for the secondary current drop, secondary current rise, or keeping current constant for adjacent load are deduced, as follows.…”
Section: Angle Of the mentioning
confidence: 99%
See 1 more Smart Citation
“…Substitute the Equations (6) and 7into (8), then Taking the classical presag compensation strategy of DVR as an example, the corresponding conditions for the secondary current drop, secondary current rise, or keeping current constant for adjacent load are deduced, as follows.…”
Section: Angle Of the mentioning
confidence: 99%
“…A new compensation strategy that is based on the combination of minimum energy compensation method and the longest compensation duration method is proposed [17]. The simulation results prove that this compensation strategy can provide compensation of a longer time The main aspects in the research field of DVR include the DVR topology [6][7][8], the location of the output filter capacitance [9], the series transformer's capacity [10], the control strategies [11,12], the voltage detection methods [13], and the compensation strategies [14]. The studies about the DVR control strategies [11,12] mainly focus on how to improve DVR dynamic performance and harmonic control.…”
Section: Introductionmentioning
confidence: 99%
“…A lot of power electronic devices have been adopted to improve PQ. Generally, an active power filter (APF) is used to handle the current-related PQ problems, while dynamic voltage restorer (DVR) is preferred to tackle the voltage-related PQ problems [4,5]. Unified PQ conditioner (UPQC), as the integration of an APF and a DVR sharing a common dc-link [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], can deal with both current and voltage-type of PQ issues, simultaneously.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, to eliminate the injection transformers from DVR topology, some studies are carried out. A transformerless single-phase DVR is suggested for low-voltage (LV) level in [6][7][8][9]. Owing to the single-phase operation, the isolation requirement between the series converters is eliminated and transformerless topology is performed in the proposed systems.…”
Section: Introductionmentioning
confidence: 99%