Circulating Harmonic Current Elimination of a CPS-PWM-Based Modular Multilevel Converter With a Plug-In Repetitive Controller

Zhang, Ming; Huang, Long; Yao, Wenxi; Liu, Zhengyu

doi:10.1109/tpel.2013.2269140

Cited by 270 publications

(150 citation statements)

References 54 publications

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“…Since the circulating current of the MMC happens to be a complex signal associated with a series of current harmonics, the RC is a very suitable solution to control them. Applying an RC controller to circulating current control has been discussed in the literature [16]. Note that [16] simultaneously adopts two controllers, an RC controller and a traditional PI controller, in which the PI controller regulates the dc component of the circulating current, and the RC controller is used to attenuate unwanted ac harmonics.…”

Section: B Repetitive Controller For the Circulating Current Controlmentioning

confidence: 99%

“…Applying an RC controller to circulating current control has been discussed in the literature [16]. Note that [16] simultaneously adopts two controllers, an RC controller and a traditional PI controller, in which the PI controller regulates the dc component of the circulating current, and the RC controller is used to attenuate unwanted ac harmonics. However, conflicts are inevitable between these two controllers.…”

Section: B Repetitive Controller For the Circulating Current Controlmentioning

confidence: 99%

“…In addition, circulating current control can also be realized by repetitive control (RC) [16]. RC is based on the internal model principle.…”

Section: Introductionmentioning

confidence: 99%

“…The most outstanding merit of RC is its ability to eliminate all of the harmonics in a periodical signal with infinite gains at these harmonic frequencies. In [16], the circulating current control of an MMC is performed by paralleling a traditional PI controller with a RC controller. Thus, the multiple circulating current harmonics can be well attenuated by the RC controller.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Circulating Current Harmonics Suppression for Modular Multilevel Converters Based on Repetitive Control

Li¹,

Xu²,

Xu³

2014

Journal of Power Electronics

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Modular multilevel converters (MMCs) have emerged as the most promising topology for high and medium voltage applications for the coming years. However, one particular negative characteristic of MMCs is the existence of circulating current, which contains a dc component and a series of low-frequency even-order ac harmonics. If not suppressed, these ac harmonics will distort the arm currents, increase the power loses, and cause higher current stresses on the semiconductor devices. Repetitive control (RC) is well known due to its distinctive capabilities in tracking periodic signals and eliminating periodic errors. In this paper, a novel circulating current control scheme base on RC is proposed to effectively track the dc component and to restrain the low-frequency ac harmonics. The integrating function is inherently embedded in the RC controller. Therefore, the proposed circulating current control only parallels the RC controller with a proportional controller. Thus, conflicts between the RC controller and the traditional proportional integral (PI) controller can be avoided. The design methodologies of the RC controller and a stability analysis are also introduced. The validity of the proposed circulating current control approach has been verified by simulation and experimental results based on a three-phase MMC downscaled prototype.

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Section: B Repetitive Controller For the Circulating Current Controlmentioning

confidence: 99%

Section: B Repetitive Controller For the Circulating Current Controlmentioning

confidence: 99%

“…In addition, circulating current control can also be realized by repetitive control (RC) [16]. RC is based on the internal model principle.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Circulating Current Harmonics Suppression for Modular Multilevel Converters Based on Repetitive Control

Li¹,

Xu²,

Xu³

2014

Journal of Power Electronics

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“…Therefore, three-level inverter options are attracting greater attention in the fields of the grid interconnection, new energy, fuel electromagnetic [7], [8]. Because of the wide application of three-level inverters, the study of its control strategy has been increasingly highlighted [9]- [15]. One of commonly used control strategies is sinusoidal pulse width modulation (SPWM …”

Section: Introductionmentioning

confidence: 99%

Wavelet PWM Technique for Single-Phase Three-Level Inverters

Zheng¹,

Zhang²,

Qiu³

et al. 2015

Journal of Power Electronics

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The wavelet PWM (WPWM) technique has been applied in two-level inverters successfully, but directly applying the WPWM technique to three-level inverters is impossible. This paper proposes a WPWM technique suitable for a single-phase three-level inverter. The work analyzes the control strategy with the WPWM and obtains the design of its parameters. Compared with the SPWM technique for a single-phase three-level inverter under the same conditions, the WPWM can obtain high magnitudes of the output fundamental frequency component, low total harmonic distortion, and simpler digital implementation. The feasibility experiment is given to verify of the proposed WPWM technique.

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A model‐based controller for a single‐phase grid‐tied modular multilevel inverter with regulation and balance of energy

Contreras

Escobar

Fernández

et al. 2019

Int Trans Electr Energ Syst

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Summary A controller based on the model is presented for a single‐phase grid‐tied inverter of 2N + 1 levels, which is based on the modular multilevel converter (MMC) topology, where N is the number of cells per arm. This is referred to as an MMC‐based inverter in this paper. The controller has the purpose to assure a good performance of the converter operation both internally and during grid connection. For this, the proposed controller involves four control loops, namely, overall energy regulation, energy balance between arms, circulating current, and injected current loops. Notice that the proposed controller by itself guarantees voltage regulation at the arms level only. To guarantee individual regulation of each cell capacitor voltage, the proposed controller is then combined with the phase‐shifted carrier‐based pulse‐width modulation (PSC‐PWM) scheme. Experimental evidence is exposed to assess the performance of the proposed control scheme. The experimental setup considers a grid‐tied inverter based on an MMC of seven levels (N = 3). The proposed controller and the experimental prototype are implemented in a hardware‐in‐the‐loop platform. The experimental tests include responses to step changes in the load power and unbalance in the initial capacitor voltages.

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Circulating Harmonic Current Elimination of a CPS-PWM-Based Modular Multilevel Converter With a Plug-In Repetitive Controller

Cited by 270 publications

References 54 publications

Circulating Current Harmonics Suppression for Modular Multilevel Converters Based on Repetitive Control

Circulating Current Harmonics Suppression for Modular Multilevel Converters Based on Repetitive Control

Wavelet PWM Technique for Single-Phase Three-Level Inverters

A model‐based controller for a single‐phase grid‐tied modular multilevel inverter with regulation and balance of energy

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