A New Control Approach Based on the Differential Flatness Theory for an AC/DC Converter Used in Electric Vehicles

Pahlevaninezhad, Majid; Das, Pritam; Drobnik, J.; Jain, Praveen; Bakhshai, Alireza

doi:10.1109/tpel.2011.2170098

Cited by 90 publications

(33 citation statements)

References 36 publications

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“…As a result of the study the flatness based control presents a robust performance though it is activated later in the valve motion than PI controller, the reference velocity of the armature is being followed with a smaller error with the flatness based controller than the PI controller. The conventional PI controller of the intermediate DC-bus voltage of an AC/DC converter is replaced with a flatness based controller of the power factor correction stage of a AC/DC boost converter in study [10], resulting with a faster response at the regulation of the output voltage and a higher duty ratio of the full bridge converter. The static feed forward part of the conventional PI controller is replaced with a dynamic feed forward control based on differential flatness theory in the control of a pumped storage power plant in study [11] resulting with the critical oscillations on pressure being prevented.…”

Section: Introductionmentioning

confidence: 99%

A non-linear model based feed forward flatness control approach to speed governor systems of hydropower plants

Koşalay

Özkaya

2017

Teh. vjesn.

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A NON-LINEAR MODEL BASED FEED FORWARD FLATNESS CONTROL APPROACH TO SPEED GOVERNOR SYSTEMS OF HYDROPOWER PLANTS İlhan Koşalay, Derya ÖzkayaProfessional paper This study is a part of a refurbishment project, which renews the hydro-mechanical speed governor of a hydroelectric power plant (HEPP) with a new digital one. Based on the previous study of the project, which covers the validation of the HEPP model, the simulation studies implemented in Matlab/Simulink environment are conducted to design the best controller philosophy for the digital speed governor controller. In order to be able to give satisfactory response to the load frequency control of the power system, the speed governor should respond to the set point changes as quickly as possible within the safe margins. In order to compensate unsatisfactory performance indices of conventional proportional-integral (PI) controller, a new controller based on the differential flatness theory is designed. The new controller is constructed by adding on a flatness-based feed forward part to the existing PI feedback controller, which results in improved performance compared to the conventional PI controller. Keywords: flatness-based controller; hydroelectric power plant modelling; load frequency control; speed governor Pristup reguliranju ravnomjernosti s unaprijednom spregom sustava regulatora brzine hidroelektrana zasnovan na nelinearnom modeluStručni članak Ovo istraživanje je dio projekta sanacije kojim se hidro-mehanički regulator brzine hidroelektrane (HEPP) zamjenjuje s novim, digitalnim. Na temelju ranijeg istraživanja procjene HEPP modela, simulacijska istraživanja u Matlab/Simulink okruženju provedena su u svrhu razvijanja najbolje filozofije za proizvodnju digitalnog regulatora brzine. Kako bi se moglo ponuditi odgovarajuće rješenje za reguliranje učestalosti punjenja energetskog sustava, regulator brzine bi u okviru dopuštenih granica trebao što brže reagirati na zadane promjene. U svrhu kompenzacije pokazatelja nezadovoljavajuće performanse uobičajenog proporcionalno-integralnog (PI) regulatora, konstruiran je novi regulator zasnovan na teoriji diferencijalne ravnomjernosti. Novi je regulator konstruiran dodavanjem postojećem PI regulatoru povratne sprege na ravnomjernosti zasnovan dio unaprijedne sprege. Rezultat je bolji rad nego s konvencionalnim PI regulatorom.Ključne riječi: modeliranje hidroelektrane; regulator brzine; regulator brzine punjenja; regulator zasnovan na ravnomjernosti

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Section: Introductionmentioning

confidence: 99%

A non-linear model based feed forward flatness control approach to speed governor systems of hydropower plants

Koşalay

Özkaya

2017

Teh. vjesn.

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“…Therefore, for the precise approach nonlinear control techniques are used, which gives fast transient response with less overshoot or undershoot. Nonlinear techniques such as Lyapunov control [9], differential flatness control [10,11], and one cycle control [12] exhibit inherent immunity to system variations. However, the controller based on Lyapunov or flatness theory controls the input power by utilizing large bandwidth in a power control loop and necessitates a specific load profile.…”

Section: Introductionmentioning

confidence: 99%

Improved resettable integrator control for a bridgeless interleaved AC/DC converter

Kanimozhi¹,

Thazhathu²

2017

Turk J Elec Eng & Comp Sci

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Plug-in hybrid electric vehicles (PHEVs) consist of a front-end boost rectifier, which incorporates a power factor correction (PFC) circuit for battery charging. Bridgeless interleaved (BLIL) PFC boost converter topology is proved as a standard PFC converter as it has high efficiency, reduced input current ripple, and reduced electromagnetic interference (EMI). This paper proposes a digital nonlinear control technique that employs a resettable integrator to shape the input current of the converter in phase with the input voltage to achieve high input power factor. This control approach rejects power source and load perturbations better than linear feedback control methods. This is accomplished by summing up the sensed input current of a BLIL converter with a fictitious current synthesized with the input voltage.In this work, a BLIL converter is analyzed for its input power factor improvement, voltage stress across the devices, and dynamic response under variable supply and load conditions using simulation. The hardware is tested for a 300 W BLIL boost converter to validate the simulated results. The performance of the proposed controller is compared with that of conventional average current mode control. The experiment and simulation results prove that the resettable integrator controller shows a better performance than the conventional controller.

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“…Consequently, the MR has a broad application prospect in electrical traction, uninterruptible power supplies and power supplies for telecommunication system, etc [3,4].…”

Section: Introductionmentioning

confidence: 99%

Sliding mode control of uncertain parameter for a matrix rectifier

Wang

Mao²,

2016

IEICE Electron. Express

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Abstract:The external uncertainties and disturbance affect the DC output of a matrix rectifier (MR) system. This paper presents a sliding mode control (SMC) of uncertain parameters for a MR. Adding a value of anti-voltage into the control function can effectively mitigate the chattering of the sliding motion. Besides, the method of calculating the minimum value of antivoltage are presented, which can ensure better dynamic performance of a MR. Theoretical and experimental results are presented to verify the correctness and feasibility of the novel control scheme.

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A New Control Approach Based on the Differential Flatness Theory for an AC/DC Converter Used in Electric Vehicles

Cited by 90 publications

References 36 publications

A non-linear model based feed forward flatness control approach to speed governor systems of hydropower plants

A non-linear model based feed forward flatness control approach to speed governor systems of hydropower plants

Improved resettable integrator control for a bridgeless interleaved AC/DC converter

Sliding mode control of uncertain parameter for a matrix rectifier

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