Control Concepts for Hybrid Rectifiers Utilizing a Flying Converter Cell Active Current Injection Unit

Makoschitz, Markus; Hartmann, M.; Ertl, H.

doi:10.1109/tpel.2016.2570429

Cited by 6 publications

(8 citation statements)

References 37 publications

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“…The relation between the optimum duty ratio of boost converter, D opt at different values of q and n can be obtained as shown in (24) by using (13). The relation between D opt and q and n is shown in Fig.…”

Section: Proposed Scheme Using Bs-hidmentioning

confidence: 99%

“…The minimum value of THD can be obtained by solving (24), (25), and (26) for D opt , q opt , and n opt . The relations between d, q, and n obtained from these equations are non-linear relations.…”

Section: Proposed Scheme Using Bs-hidmentioning

confidence: 99%

“…The main purpose of the HIN is to extract third harmonic current from dc‐bus. This network may have active switches which is called active harmonic injection network [23, 24] or without active switches which is called passive harmonic injection network (PHIN) [21] which will be used in this paper as shown in Figs. 1 a and b .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Harmonic injection scheme for harmonic reduction of three‐phase controlled converters

Eltamaly

2018

IET Power Electronics

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High harmonics in supply currents of three-phase controlled/uncontrolled converters are creating many problems to the power system and customers at point of common coupling. Third harmonic current injection technique is an excellent option for harmonic reduction of these converters. Minimum total harmonic distortion (THD) for any firing angle of controlled converter is function in phase-angle and amplitude of harmonic injection current that can be controlled by single-phase controlled converter and boost converter, respectively. A novel scheme with three bidirectional switches and single-phase controlled converter to circulate the injection current to supply currents has been introduced. This novel scheme is compared to the stateof-the-art system using zigzag transformer. A novel mathematical analysis showing the optimum values for components on the harmonic injection path at minimum THD and the corresponding efficiency for the proposed scheme and state-of-the-art scheme is introduced. Two lab prototypes for these two schemes have been implemented, discussed, and compared to show the benefits of using the new proposed scheme. The results show the superiority of the new proposed scheme.

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Section: Proposed Scheme Using Bs-hidmentioning

confidence: 99%

Section: Proposed Scheme Using Bs-hidmentioning

confidence: 99%

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Harmonic injection scheme for harmonic reduction of three‐phase controlled converters

Eltamaly

2018

IET Power Electronics

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“…[1,2]. The most promising method is to use self-excited voltage inverters with a DC link [3][4][5]. Compensated rectifiers and circuits with a large number of phases are used to improve the energy indicators at PCC [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Voltage regulation and phase quantity increase of two high-power 12-phase rectifiers

Safonov

Dziuba

2019

IJPEDS

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In this article, we present a new method of simultaneously increasing the phase quantity and regulating the rectified voltage for two 12-phase high-power rectifiers operating at a common load. Self-excited voltage inverters separately form the necessary voltages for voltage regulation and for increasing the phase quantity. The formed voltage is input with the help of a common booster transformer. Separating the inverters functions and using the common booster transformer makes it possible to reduce the installed power of the equipment significantly compared to similar circuits when the regulation range of the rectified voltage is up to 5%. Calculations show that the inverter power for increasing the phase quantity is about 3% of the rectifier power. The circuit was modeled in MatLab/Simulink and the electromagnetic processes in the rectifier were studied. The proposed method makes it possible to reduce the total harmonic distortion of the network current and the pulsation coefficient of the rectified voltage to the values typical for 24-phase rectifiers.

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“…The minimum value of THD can be obtained by solving (21), (22), and (23) for D opt , q opt , n opt . The relations between d, q, and n obtained from these equations are nonlinear relations.…”

mentioning

confidence: 99%

Efficient current injection device for harmonic reduction of three‐phase controlled converters

Eltamaly

2017

IET Circuits, Devices & Syst

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Third harmonic current injection technique is one of the best options for harmonic reduction of three-phase controlled/ uncontrolled converters. Injecting third harmonics current from dc-bus to the line current reduces its harmonic contents. Minimum THD for any firing angle of controlled converter is function in phase-angle and amplitude of harmonic injection current that can be controlled by single-phase controlled and boost converters, respectively. This scheme is used with three bidirectional switches as harmonic injection device to circulate the injection current to supply currents. This scheme is compared with the state-of-the-art system using zigzag transformer. A novel mathematical analysis for the proposed scheme and state-ofthe-art scheme is introduced. The mathematical analysis introduces the optimum values for components on the harmonic injection path at minimum THD and the corresponding efficiency of each scheme. The two schemes under study have been simulated using PSIM program. Two lab prototypes for these two schemes have been implemented. Mathematical, simulation, and experimental results for these two schemes have been introduced, compared, and discussed. The results show the superiority of the proposed scheme.

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Control Concepts for Hybrid Rectifiers Utilizing a Flying Converter Cell Active Current Injection Unit

Cited by 6 publications

References 37 publications

Harmonic injection scheme for harmonic reduction of three‐phase controlled converters

Harmonic injection scheme for harmonic reduction of three‐phase controlled converters

Voltage regulation and phase quantity increase of two high-power 12-phase rectifiers

Efficient current injection device for harmonic reduction of three‐phase controlled converters

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