DC Networks Including Multiport DC/DC Converters: Fault Analysis

Corti, Matteo; Tironi, E.; Ubezio, Giovanni

doi:10.1109/tia.2016.2572045

Cited by 26 publications

(28 citation statements)

References 23 publications

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“…The latter is discussed in the next section. From the characteristic equation of the system given in (6) and (8) and comparing with the standard form of a second-order system's equation [26,27]…”

Section: Power Stage Adjustmentmentioning

confidence: 99%

“…The conventional BDC frequently used in the literature for energy storage applications [6][7][8][9][10][11][12] is composed of a half-bridge converter and works as a separate Buck converter in step-down mode and Boost converter in step-up mode, with two controllable semiconductor switches. Figure 1 shows the conventional, nonisolated BDC with some drawbacks, as noted below.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Bidirectional DC-DC Converter for Dynamic Performance Enhancement of Hybrid AC/DC Microgrid

Keshavarzi

Ali

2020

Electronics

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The conventional bidirectional DC-DC converter (BDC), which employs a half-bridge configuration, has some major disadvantages, including a controller designed for one direction with poor performance in the other direction, a bidirectional operation which does not have symmetrical voltage gain resulting in asymmetrical operation, and step-up and step-down switches that are simultaneously modulated, thereby increasing switching losses. To overcome these drawbacks, this paper proposes a new, nonisolated, DC-DC converter for the bidirectional power flow of battery energy storage applications in DC and hybrid microgrids (HMGs). The proposed converter uses two back-to-back Boost converters with two battery voltage levels, which eliminates step-down operation to obtain symmetric gains and dynamics in both directions. In discharge mode, two battery sections are in parallel connection at a voltage level lower than the grid voltage. In charge mode, two battery sections are in series connection at a voltage level higher than the grid voltage. Simulations demonstrate the efficacy of the proposed converter in the MATALB\Simulink environment. The results show that the proposed converter has promising performance compared to that of the conventional type. Moreover, the novel converter adds no complexity to the control system and does not incur considerable power loss or capital cost.

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Section: Power Stage Adjustmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Bidirectional DC-DC Converter for Dynamic Performance Enhancement of Hybrid AC/DC Microgrid

Keshavarzi

Ali

2020

Electronics

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“…In addition, the required voltage and power levels that are needed to build a hybrid ac/dc microgrid are still not well defined for the dc part of the hybrid microgrid. Initial designs are proposed in [3][4][5][6][7] to either set the power and dc voltage levels or to propose a topology for the multiport converter. For example, authors in [3] propose a bipolar dc grid with three voltage levels that are available to supply dc loads: ±170V and 340V.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], the authors propose a bidirectional high density 2-L voltage source converter, using SiC devices and rated at 100kW, as an interface between the main ac utility grid and a 380V dc distribution grid and compare it to an existing topology used in data centres, consisting of 7x15kW unidirectional singlephase dual boost rectifiers connected to each output phase of the three-phase ac grid. Similarly, authors in [5] propose the 2-L voltage source converter and present protection schemes for limiting or clearing fault currents occurring at dc grids. Other advanced converter topologies have been proposed as an interlink converter which is more dependent on the hybrid microgrid structure.…”

Section: Introductionmentioning

confidence: 99%

Comparative Optimization Design of a Modular Multilevel Converter Tapping Cells and a 2L-VSC for Hybrid LV ac/dc Microgrids

Lachichi

Junyent-Ferré

Green

2019

IEEE Trans. on Ind. Applicat.

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The paper presents the performance of the modular multilevel converter tapping cells associated with an ac filter in term of efficiency and power density in a hybrid LV ac/dc microgrid application and compares it to the performance of the conventional topology used in LV application, i.e., the Two-Level voltage source converter (2L VSC). A bi-objective optimization based on the Genetic Algorithm is hence developed, providing details on designing the components of the LCL filter, the MMC and the 2L VSC. The MMC reaches an efficiency of 99.4% when the main dcgrid is left floating. However, due to its modularity and scalability, offering multiport connections option, the MMC tapping cells has the disadvantage of low power density. Exploring the filtering capability of the equivalent arm inductance of the MMC seen from the ac grid side, optimization design results show that higher switching frequencies allow a significant volume reduction of the inductive components of the MMC/LCL filter while higher switching frequencies have little impact on the switching losses of the MMC. This has the benefit of reducing the overall footprint of the converter and encouraging the use of the MMC in LV application. Index Terms-Hybrid ac/dc microgrid, interlink converter, MMC, GA based optimization, tapping cells, two-level VSC.

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“…MatteoCorti, et.al [10] recommended that DC organizes that consist of stockpiling frameworks, inexhaustible assets, dc loads, and the front-quit converters can supply a few focal factors as compared with air con network. Be that as it may, the intrusion of deficiency flows is difficult because of no-zero intersection of the current.…”

Section: Introductionmentioning

confidence: 99%

A Single Input Dual Output Multiport DC–DC Converter with Minimal Switches

2019

IJRTE

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This paper proposes a topology for multiport DCDC converter with double yield for a solitary facts. Essentially the buck converter's yield is lesser than the records. Boost converter's yield is more distinguished than the info. buck-boost converter's yield is each more noteworthy or lesser than the facts. Be that as it is able to, the interest of the proposed converter is, it surrenders the both increase and undertaking down yields all the at the same time as. The contemporary-day topology of the multiport DC-DC Converter applied four switches however the proposed topology uses less number of switches with excessive yield contrasted with existing one. It likewise brings approximately decrease of replacing misfortunes. The skillability of the converter is improved, yield voltages get controlled and the charge of the circuit diminishes because of its minimization. The near circle PI controlling approach is embraced. The results were checked with the resource of making use of MATLAB simulink software program program

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DC Networks Including Multiport DC/DC Converters: Fault Analysis

Cited by 26 publications

References 23 publications

A Novel Bidirectional DC-DC Converter for Dynamic Performance Enhancement of Hybrid AC/DC Microgrid

A Novel Bidirectional DC-DC Converter for Dynamic Performance Enhancement of Hybrid AC/DC Microgrid

Comparative Optimization Design of a Modular Multilevel Converter Tapping Cells and a 2L-VSC for Hybrid LV ac/dc Microgrids

A Single Input Dual Output Multiport DC–DC Converter with Minimal Switches

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