FPGA implementation of open-loop controller for five-level three phase modular multilevel converter

Fatunmbi, Rere; Okoye, Okezie; Lasabi, Olanrewaju; Davidson, Innocent E.

doi:10.1109/afrcon.2017.8095677

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…The operation of the open loop control system is based on the estimation of the total capacitor voltages via the stored energy in each arm's SMs, which is performed by measuring the other components and results in a less-complex interface with the regulator. The contribution of the voltage difference 𝑣𝑣 𝑑𝑑𝑑𝑑𝑟𝑟𝑟𝑟 that must be deducted from the voltage reference 𝑒𝑒 𝑣𝑣 𝑟𝑟𝑟𝑟𝑟𝑟 can be described as follows [86,98].…”

Section: Open Loop Control Techniquementioning

confidence: 99%

A Review on Modular Converter Topologies Based on WBG Semiconductor Devices in Wind Energy Conversion Systems

Athwer,

Darwish

2023

Energies

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This paper presents a comprehensive review on the employment of wide bandgap (WBG) semiconductor power devices in wind energy conversion systems (WECSs). Silicon-carbide- (SiC) and gallium-nitride (GaN)-based power devices are highlighted and studied in this review, focusing on their application in the wind energy system. This is due to their premium characteristics such as the operation at high switching frequency, which can reduce the switching losses, and the capability to operate at high temperatures compared with silicon (Si)-based devices. These advantages promote the replacement of the conventional Si-based devices with the WBG semiconductor devices in the new modular converter topologies due to the persistent demand for a more-efficient power converter topology with lower losses and smaller sizes. The main objective of this paper was to provide a comprehensive overview of the WBG power devices commercially available on the market and employed in the modular converter topologies for renewable energy systems. The paper also provides a comparison between the WBG power technologies and the traditional ones based on the Si devices. The paper starts from the conventional modular power converter topology circuits, and then, it discusses the opportunities for integrating the SiC and WBG devices in the modular power converters to improve and enhance the system’s performance.

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Section: Open Loop Control Techniquementioning

confidence: 99%

A Review on Modular Converter Topologies Based on WBG Semiconductor Devices in Wind Energy Conversion Systems

Athwer,

Darwish

2023

Energies

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“…Focusing on harmonic estimation part, an open-loop controller is adopted to replace the PID controller for switching sequence generation, which was proved efficient as well especially with FPGA (field-programmable gate array) implementation [27]. For quasi-dynamic simulation in grid case studies, a close-loop controller can still be utilized, while its feedback period should be set long enough for the grid to move to another stable status.…”

Section: B MMC Operationmentioning

confidence: 99%

Harmonic Current Emission Estimation of Modular Multilevel Converters in MV Charging Stations

Gong

Ćuk

Cobben

2023

IEEE Trans. Power Delivery

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This paper proposes a novel framework for modular multilevel converter (MMC) current harmonic emission estimation from medium voltage (MV) charging stations. The framework is enlightened by wave decomposition, exploiting an analytical derivation of the emission, without a time-domain model. Accordingly, voltage harmonic distribution in grids can be estimated with a frequency-domain model, using the estimated voltage-dependent current emission in the iterations. Compared to conventional timedomain simulation, such method not only enables analytical harmonic estimation integrated with a large load-flow model, but also benefits from the potential of distributed computation. A 10.5 kV grid-tied single-phase half-bridge MMC simulation case on PLECS has been implemented and investigated for comparison.Corresponding results revealed that the estimated harmonic series kept the absolute average difference to the PLECS model lower than 0.02% and a correlation ratio higher than 99.990% with the simulated ones. The effectiveness of the proposed estimation framework is successfully verified.

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“…Regardless of the voltage balancing module, once the modulation scheme has been determined, combined with predictable U * p and U * w , switched U p and U w could be forecast. In accordance with such assumption, Focusing on harmonic estimation part, an open-loop controller is adopted to replace the PID controller for switching sequence generation, which was proved efficient as well especially with FPGA (field-programmable gate array) implementation [27]. For quasi-dynamic simulation in grid case studies, a close-loop controller can still be utilized, while its feedback period should be set long enough for the grid to move to another stable status.…”

Section: B MMC Operationmentioning

confidence: 99%

Harmonic Current Emission Estimation of Modular Multilevel Converters in MV Charging Stations

Gong¹,

Ćuk²,

Cobben³

2022

Preprint

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<p>This paper proposes a novel framework for modular multilevel converter (MMC) current harmonic emission estimation from medium voltage (MV) charging stations. The framework is enlightened by wave decomposition, exploiting an analytical derivation of the emission, without a time-domain model. Accordingly, voltage harmonic distribution in grids can be estimated with a frequency-domain model, using the estimated voltage-dependent current emission in the iterations. Compared to conventional time-domain simulation, such method not only enables analytical harmonic estimation integrated with a large load-flow model, but also benefits from the potential of distributed computation. A 10.5kV grid-tied single-phase half-bridge MMC simulation case on PLECS has been implemented and investigated for comparison. Corresponding results revealed that the estimated harmonic series kept the absolute average difference to the PLECS model lower than 0.02% and a correlation ratio higher than 99.79% with the simulated ones. The effectiveness of the proposed estimation framework is successfully verified.</p>

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FPGA implementation of open-loop controller for five-level three phase modular multilevel converter

Cited by 5 publications

References 10 publications

A Review on Modular Converter Topologies Based on WBG Semiconductor Devices in Wind Energy Conversion Systems

A Review on Modular Converter Topologies Based on WBG Semiconductor Devices in Wind Energy Conversion Systems

Harmonic Current Emission Estimation of Modular Multilevel Converters in MV Charging Stations

Harmonic Current Emission Estimation of Modular Multilevel Converters in MV Charging Stations

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