Elimination of harmonics using multi-pulse rectifiers

Kocman, Stanislav; Kolář, Václav; Vo, T. Trung

doi:10.1109/ichqp.2010.5625408

Cited by 11 publications

(13 citation statements)

References 2 publications

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“…Multi-pulse rectifiers have been known for many years as the devices which minimize the higher harmonics generated by drive systems (kocman et al 2010(kocman et al , kiMet et al 2019. According to the theory the multi-pulse rectifiers exclude certain harmonics due to the phase shift between the transformer windings (iwaSZkiewicZ et al 2019, MYsiak 2007.…”

Section: -Pulse Rectifiermentioning

confidence: 99%

Analysis of Harmonics Reduction Method Selection for Transformer Substation

Racewicz¹,

Rokicki²

2019

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The article presents an investigation of the harmonic level and its possible reduction methods for one of the Michelin factory transformer substation. The substation electrical network consists of two transformers (1.6 MVA and 2.0 MVA) supplying a production line composed of several electrical equipment based on DC and AC motors. In order to investigate the harmonics level and its influence on the substation operation the measurements of the current and the load factor of the powered machines as well as the coefficients THDu, THDi, Du and Di have been performed using the 3-phase energy quality analyzer Fluke 435II and the network parameter recorder PEL103. Basing on the measurements data the four harmonics reduction methods (passive filters, active filters, 12-pulse rectifier and the Active Front End system) have been proposed and studied. For this purpose the substation electrical network has been modelled using Emerson Harmonics Estymator software. Furthermore, in order to choose the optimal solution the financial analysis of the potential investments has been performed.

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Section: -Pulse Rectifiermentioning

confidence: 99%

Analysis of Harmonics Reduction Method Selection for Transformer Substation

Racewicz¹,

Rokicki²

2019

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“…to reduce harmonics in its spectrum, various technical solutions are used, such as AC and DC reactors, shunt passive filters, broadband passive harmonic filters, active filtering, drives with input active front end rectifier instead of the standard six-pulse one, and multi-pulse rectifiers [6]- [11].…”

Section: Itroductionmentioning

confidence: 99%

Analysis and simulation of disturbance of excavator in sintering ore-storage yard

Hruby

Kocman

2014

Proceedings of the 2014 15th International Scientific Conference on Electric Power Engineering (EPE)

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One link of the production chain of ironworks is sintering. There is a preparation of the ore charge in it, which is transported to the next conveyor system by the bucket excavator. The paper presents results of experimental measurements performed on the bucket loader drive, an analysis of the drive disturbance and an assessment of electrical energy quality at the point of the drive connection. This paper also provides a comparison of levels of monitored voltage characteristics obtained by the measurements to simulated ones, and to their compatibility levels stated in the standard ČSN EN 61000-2-4 ed. 2: Environment -Compatibility levels in industrial plants for low-frequency conducted disturbances. Both measurement and simulation confirmed that used input reactor for harmonic mitigation in the drive structure has only very low impact on the level of drawn current and supply voltage distortion. In this paper a simulation is also done for a possibility of using broadband passive harmonic filters to reduce current and voltage distortion. The results show their significant impact on improving quality of drawn current by the drive and supply voltage at the point of its connection.

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“…The three-phase diode rectifier's cancellation of the input current harmonics in multicell converters uses an input multipulse transformer [6][7][8]. Although from the point of view of energy efficiency, for non-linear load power applications, the transformer must not operate at its nominal power [9], the preceding is due to a possible bad design, where it was not considered the current flowing through the transformer has harmonic content.…”

Section: Introductionmentioning

confidence: 99%

Finite Control Set—Model Predictive Control with Non-Spread Spectrum and Reduced Switching Frequency Applied to Multi-Cell Rectifiers

et al. 2021

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Multi-cell converters are widely used in medium-voltage AC drives. This equipment is based on power cells that operate with low-voltage-rating semiconductors and require an input multipulse transformer. This transformer cancels the low-frequency current harmonics generated by the three-phase diode-based rectifier. Unfortunately, this transformer is bulky, heavy, expensive, and does not extend the existing power cell (three-phase rectifier—Direct Current (DC) voltage-link—single-phase inverter) to the transformer. In this study, a harmonic cancelation method based on finite control set-model predictive control (FCS–MPC), extending the power cell’s modularity to the input transformer. On the other hand, it considers treating the two disadvantages of the FCS–MPC: High switching frequency and spread spectrum. The details were developed in theory and practice to obtain satisfactory experimental results.

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Elimination of harmonics using multi-pulse rectifiers

Cited by 11 publications

References 2 publications

Analysis of Harmonics Reduction Method Selection for Transformer Substation

Analysis of Harmonics Reduction Method Selection for Transformer Substation

Analysis and simulation of disturbance of excavator in sintering ore-storage yard

Finite Control Set—Model Predictive Control with Non-Spread Spectrum and Reduced Switching Frequency Applied to Multi-Cell Rectifiers

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