A Grid-Level High-Power BTB (Back-To-Back) System Using Modular Multilevel Cascade Converters WithoutCommon DC-Link Capacitor

Sekiguchi, K.; Khamphakdi, Pracha; Hagiwara, Makoto; Akagi, Hirofumi

doi:10.1109/tia.2013.2290867

Cited by 62 publications

(43 citation statements)

References 22 publications

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“…V S is the rms voltage of the ac mains voltage during normal operating condition (= 200 V) as listed in Table I. K p and K i are the proportional and integral gains used for the overall voltage control presented in [16], respectively, and v C is the arithmetical average voltage of all the dc capacitors used in DSCC-A and DSCC-B, and v * C is its reference as shown in Fig. 4.…”

Section: B Solution For the Above Problemsmentioning

confidence: 99%

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Zero-Voltage Ride-Through Capability of a Transformerless Back-To-Back System Using Modular Multilevel Cascade Converters for Power Distribution Systems

Khamphakdi

Nitta

Hagiwara

et al. 2016

IEEE Trans. Power Electron.

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This paper focuses on the zero-voltage ride-through (ZVRT) capability of a transformerless back-to-back (BTB) system intended for installation on a power distribution system with many distributed power generators. The BTB system consists of two modular multilevel cascade converters based on double-star chopper cells (MMCC-DSCC) and their ac sides are connected to a common ac mains via ac-link inductors. This paper provides an experimental discussion on the DSCC-based BTB system under voltage sags by using a three-phase 200-V 10-kW downscaled system. Experimental results show that the BTB system is equipped with ZVRT capability without causing any overvoltage and/or overcurrent even under the most severe voltage sags. Index Terms -Back-to-back (BTB) systems, modular multilevel cascade converters (MMCC), zero-voltage ride-through (ZVRT) capability.0885-8993 (c)

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Section: B Solution For the Above Problemsmentioning

confidence: 99%

“…The dc-capacitor voltage control used in this paper has been presented in [16]. It can be divided into the following parts:…”

Section: Dc-capacitor Voltage Controlmentioning

confidence: 99%

Zero-Voltage Ride-Through Capability of a Transformerless Back-To-Back System Using Modular Multilevel Cascade Converters for Power Distribution Systems

Khamphakdi

Nitta

Hagiwara

et al. 2016

IEEE Trans. Power Electron.

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“…The "HVDC-Plus" from Siemens [12], "HVDC-Light" from ABB [13], and "HVDC-Maxsine" from Alstom [14] are examples of the implementation of DSCC concept in applications of VSC-HVDC transmission. Some papers in the literature have focused on control, modelling, and performance of the DSCC-based BTB or HVDC systems during the voltage sags using different control strategies for mitigating and controlling the zero-sequence current components in the systems, especially in case of transformerless system [15].…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this paper following [15] is to analyse and control the zero-sequence components in details when the BTB system is installed between two 6.6-kV power distribution feeders with many distributed power generators. It also referred to as the so-called "loop power flow controller."…”

Section: Introductionmentioning

confidence: 99%

The Analysis and Control of Zero-Sequence Components in a Transformerless Back-To-Back (BTB) System Using Modular Multilevel Cascade Converters for Power Distribution Systems

Khamphakdi¹

2017

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Abstract. This paper provides an intensive discussion on analysis and simulation of a back-to-back (BTB) system based on double-star chopper cells (MMCCs-DSCCs). It is installed between two 6.6-kV power distribution feeders. It is also referred to as the socalled "loop power flow controller." A three-phase 200-V, 10-kW, 50-Hz BTB transformerless system is simulated to verify its operating principles, modelling, and performance of zero-sequence current control using combination between a simple PI controller and a common-mode choke. The simulation results show that the zerosequence current circulating between the two feeders can be suppressed as small as 10 mA (0.03%) in rms, which is within acceptable value and small enough to negligible.

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“…Many studies have been made on increasing the power handling capacity of the BTB converter by structuring it with multilevel converters [2][3][4], generally by the implementation of series arrangement of converters; sometimes these topologies are not flexible in terms of the increment of power capacity. In this paper a modular multilevel converter is proposed, in the approach n cells are added to the arrangement in order to increase the current capacity of the system.…”

Section: Introductionmentioning

confidence: 99%

Modular multilevel BTB converter with parallel cells

Almaguer

Cardenas

Miranda

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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This article presents the analysis of a single-phase Back-to-Back converter with a generalized parallel structure, in order to manage bidirectional active power flow between two AC systems. The considered topology is formed by single-phase cells coupled magnetically through a power transformer. The main strategy to operate the converter is to distribute the active power flow symmetrically between the n cells in the parallel arrangement. Also, the parallel structure is used to compensate the reactive power independently at each AC system. The proposed converter is validated through simulation, considering a power structure of 30 kVA, with three parallel cells.

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A Grid-Level High-Power BTB (Back-To-Back) System Using Modular Multilevel Cascade Converters WithoutCommon DC-Link Capacitor

Cited by 62 publications

References 22 publications

Zero-Voltage Ride-Through Capability of a Transformerless Back-To-Back System Using Modular Multilevel Cascade Converters for Power Distribution Systems

Zero-Voltage Ride-Through Capability of a Transformerless Back-To-Back System Using Modular Multilevel Cascade Converters for Power Distribution Systems

The Analysis and Control of Zero-Sequence Components in a Transformerless Back-To-Back (BTB) System Using Modular Multilevel Cascade Converters for Power Distribution Systems

Modular multilevel BTB converter with parallel cells

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