An optimized direct control method applied to multilevel inverter for microgrid power quality enhancement

Naderi, Yahya; Hosseini, Seyed Hossein; Zadeh, Saeid Ghassem; Mohammadi‐Ivatloo, Behnam; Savaghebi, Mehdi; Guerrero, Josep M.

doi:10.1016/j.ijepes.2018.12.007

Cited by 42 publications

(15 citation statements)

References 45 publications

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“…Several switching methods have been presented for multilevel inverters in the literature, 46,47 however in this paper, the nearest level control (NLC) method presented in Reference 21, is used to control the proposed multilevel topology where,

α_{1, 2 \overset{,}{true} \dots}

refer to switching angles. To design the value of utilized capacitors ( C x ), the voltage ripple should be calculated which is calculated as:

normalΔ U_{C_{x}} = \frac{1}{((), 2 π f_{ref}) \times C_{x}} \int_{α_{n}}^{α_{m}} i_{C_{x}} d ((), ωt) .

In which

α_{n}

and

α_{m}

are the switching angels.…”

Section: Basic Unit Of Suggested Multilevel Invertermentioning

confidence: 99%

Aswitched‐capacitorbased multilevel inverter with reduced circuit components and voltage boosting capability

Naderi

2021

Int Trans Electr Energ Syst

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Summary In this paper a novel topology of switched capacitor based multilevel inverters is proposed. In this topology, to increase the output voltage levels and to add the voltage boosting capability, several switched capacitor units are cascaded in series. Having voltage boosting capability and generating maximum number of output voltage levels using minimum number of circuit components, is a merit for this topology. To highlight the attributes of the proposed topology, it is compared with other recently proposed multilevel inverters on number of circuit components such as power electronic switches, diodes and capacitors, voltage boosting capability, total standing voltage, cost and efficiency. The comparison results verify the superiority of the proposed topology over other proposed topologies on number of circuit components, and number of output voltage levels. It is also clear that, this topology has lower voltage stress on power electronic switches, which makes it an appropriate solution for industrial applications. Finally, to show the capabilities of the proposed topology, and to verify the accurate operation of the topology, circuit analysis as well as the experimental results are provided.

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α_{1, 2 \overset{,}{true} \dots}

refer to switching angles. To design the value of utilized capacitors ( C x ), the voltage ripple should be calculated which is calculated as:

normalΔ U_{C_{x}} = \frac{1}{((), 2 π f_{ref}) \times C_{x}} \int_{α_{n}}^{α_{m}} i_{C_{x}} d ((), ωt) .

In which

α_{n}

and

α_{m}

are the switching angels.…”

Section: Basic Unit Of Suggested Multilevel Invertermentioning

confidence: 99%

Aswitched‐capacitorbased multilevel inverter with reduced circuit components and voltage boosting capability

Naderi

2021

Int Trans Electr Energ Syst

Self Cite

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“…The delay compensation not only makes up for computation time of the algorithm, but also effectively raises the performance of current tracking for motor operating on fault state and condition suddenly alteration. According to principle of delay compensation [24], all switch control signals are used to calculate the predictive current at the (k + 2)-th instant:…”

Section: Current Tracking Performancementioning

confidence: 99%

“…A current tracking method based on FSMPC is presented in [23], which improves the accuracy and rapidity of current tracking when compare to PI modulation. In [24], an optimized current control method with delay compensation is proposed to overcome harmonic current in distributed generation converters, and reference current at the next instant is tracked by controlling one switch control signal to generate one basic space voltage vector during every sampling period. However, these presented motor emulators only pursuit current tracking performance as the control object, while power loss of motor emulators is severely neglected.…”

Section: Introductionmentioning

confidence: 99%

A Power Loss Decrease Method Based on Finite Set Model Predictive Control for a Motor Emulator with Reduced Switch Count

et al. 2019

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This paper presents a power loss decrease method based on finite set model predictive control (FSMPC) with delay compensation for a motor emulator with reduced switch count. Specifically, the topology and mathematical model of the proposed motor emulator with reduced switch count are firstly built. Secondly, in light of given instructions, the normal or fault reference current of the motor emulator is set by a reference current setter. Then delay compensation is applied for the predictive current model to calculate the current residual generated by each switch control signal, and the current tracking performance under actions of two adjacent switch control signals is evaluated for each sector. Finally, a switch power loss objective function is defined, then the two adjacent switch control signals that generate the lowest switch power loss are selected for the next second instant, which minimizes the power loss of the motor emulator with ensuring satisfied current tracking performance. Simulation and experimental results show the feasibility and effectiveness of the proposed method.

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“…In recent years, many solutions have been proposed to address power quality issues. Power conditioning systems, power filters, and other tools are used to improve the quality of the electricity [25]- [28].…”

Section: Introductionmentioning

confidence: 99%

A review on techniques for improving power quality: research gaps and emerging trends

Manoj¹,

Khampariya²,

Pilla³

2022

Bulletin EEI

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Many issues have arisen for the electricity sector because of the widespread use of gadgets that rely on electrical power. India's energy demands are rising rapidly due to the country's rapid economic development. These days, almost every industry makes extensive use of electrical machinery and equipment. Electronic gadgets add a non-linear demand to the power grid, which can cause power quality (PQ) problems such as voltage fluctuations that can damage electrical equipment and even knock the grid down. As the use of DG units becomes more commonplace, complications related to power conversion interfaces, load switching, and other factors emerge as potential bottlenecks in service. Power filters were first created several decades ago to address problems with PQ and to dampen harmonics caused by nonlinear loads. This document summarises previous studies that have investigated the effectiveness of power filters and other techniques for enhancing power quality. There are also descriptions of research that is still going on and where it stands, as well as a look ahead to what its possible future benefits might be.

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An optimized direct control method applied to multilevel inverter for microgrid power quality enhancement

Cited by 42 publications

References 45 publications

Aswitched‐capacitorbased multilevel inverter with reduced circuit components and voltage boosting capability

Aswitched‐capacitorbased multilevel inverter with reduced circuit components and voltage boosting capability

A Power Loss Decrease Method Based on Finite Set Model Predictive Control for a Motor Emulator with Reduced Switch Count

A review on techniques for improving power quality: research gaps and emerging trends

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