A plug-and-play ripple mitigation approach for DC-links in hybrid systems

Li, Sinan; Lee, Albert Ting Leung; Siew-Chong-Tan,; Hui, S. Y. Ron

doi:10.1109/apec.2016.7467869

Cited by 15 publications

(3 citation statements)

References 30 publications

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“…The ASC control strategy of direct voltage regulation was proposed in [88,89]. These techniques enable a plug and play operation because the capacitor ripple voltage is regulated to zero by extracting the ripple component from the capacitor voltage.…”

Section: Controlled Current Source Strategy (Active Power Filter-based)mentioning

confidence: 99%

Topological Overview of Auxiliary Source Circuits for Grid-Tied Converters

et al. 2023

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This paper reviews different types of capacitors and auxiliary source circuit topologies and presents an introduction to control strategies used for circuit applications reducing DC-BUS capacitance. The paper argues in favor of replacing bulky electrolytic capacitors in capacitor-supported power electronic systems with auxiliary source circuits. DC-BUS capacitors are widely used in grid-tied power converters (rectifiers) and utilized for power balance, voltage ripple limitation, and short-term energy storage. The electrolyte capacitor is the Achilles heel of any rectifier and power converter due to its higher rate of failure than other circuitry components. Auxiliary source circuits are key components to qualitatively improve the reliability of the DC links, where they divert the instantaneous pulsating power into extra reliable storage components. Unlike previous work, this review serves to provide a clear picture of an auxiliary source circuit design, in favor of optimal solution selection according to the specific application. Therefore, energy storage components (capacitors), topologies, and control strategies of auxiliary source circuits are comprehensively reviewed in this paper. Additionally, detailed explanations, comparisons, and discussions of auxiliary source circuits are offered.

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Section: Controlled Current Source Strategy (Active Power Filter-based)mentioning

confidence: 99%

Topological Overview of Auxiliary Source Circuits for Grid-Tied Converters

et al. 2023

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“…In Fig. 17(b A plug-and-play ripple mitigator is a device which has a low impedance only at selective frequencies while it has an infinitely large impedance at DC [17]. This can be achieved by programming the EPI as a frequency-dependent capacitor, i.e., configuring G(s) in ) to a P function (G(s) = 20) to.…”

Section: ) Epi As a Dynamic DC Linear Capacitor (Changing G(s) From mentioning

confidence: 99%

A General Approach to Programmable and Reconfigurable Emulation of Power Impedances

Tan

et al. 2018

IEEE Trans. Power Electron.

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Abstract-Starting with a brief review on existing methods of impedance emulation, this paper addresses a general and systematic approach to programmable and reconfigurable emulation of power impedances. The proposed approach not only enables the impedance value to be programed, it also allows the characteristics (i.e. type) of the impedance to be reconfigured instantly during operation. Based on the proposed control method, emulation of at least six types of emulated power impedances (EPI) can be easily attained. In particular, it is theoretically and practically demonstrated that the impedance characteristic can be emulated through a combination of different functions. The systematic derivation of these functions is explained. New techniques that compensate the circuit power losses are introduced. This general approach has been practically verified in several EPI. Both steady-state and dynamic performance of these EPI confirm the programmability and re-configurability. It is envisaged that the proposed method can be applied to a range of functions such as power filtering, energy storage and even power conversion based on direct impedance control.

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“…The other approach is to deploy dedicated power converters for power conditioning. Both series APF [16] and shunt APFs in different topologies (buck [17], buck-boost [18], [19] and isolated converter [20]) have been reported. These solutions guarantee a sufficient redundancy for the system.…”

Section: Introductionmentioning

confidence: 99%

Hybrid-DC Electric Springs for DC Voltage Regulation and Harmonic Cancellation in DC Microgrids

Wang

Yan

Tan

2018

IEEE Trans. Power Electron.

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NOMENCLATURE ∆dDifference between D p and D n ω Angular frequency of the harmonic power.Output capacitor of the H-DCES. C min Minimum required capacitance of C 1 and C 2 . d ml Lower margin of the duty ratio. Energy of capacitor C 1 . f HP F Cut-off frequency of the high-pass filter G HP F . f LP F Cut-off frequency of the low-pass filter G LP F . G HP F Transfer function of the high-pass filter.Transfer function of the proportional-integral controller. G P R Transfer function of the quasi-proportional-resonant controller. I coCurrent of the non-critical load R N C .i max cMaximum current of the DC-link capacitor whenCurrent disturbances in the DC grid.Current of the inductor L N C . I sm Current flowing through the H-DCES. I tb Current flowing through the battery.Output filter inductor for the harmonic current. Voltage of the capacitor C 1 . Z sys Impedance of the DC grid.In this paper, unless otherwise noted, the capitalized variables with lower-case subscripts denote the combination of DC and AC signals, while the all-uppercase and all-lowercase variables 0885-8993 (c)

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A plug-and-play ripple mitigation approach for DC-links in hybrid systems

Cited by 15 publications

References 30 publications

Topological Overview of Auxiliary Source Circuits for Grid-Tied Converters

Topological Overview of Auxiliary Source Circuits for Grid-Tied Converters

A General Approach to Programmable and Reconfigurable Emulation of Power Impedances

Hybrid-DC Electric Springs for DC Voltage Regulation and Harmonic Cancellation in DC Microgrids

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