Bidirectional Power Flow Control Integrated With Pulse and Sinusoidal-Ripple-Current Charging Strategies for Three-Phase Grid-Tied Converters

Tang, Cheng-Yu; Chen, Pon-Tzu; Jheng, Jia-He

doi:10.1109/access.2021.3065692

Cited by 11 publications

(2 citation statements)

References 40 publications

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“…V out is always positive, therefore d bi V in is always significantly higher than (1 − d bi )V in . The relationship between d bi and d is represented by (20)- (22).…”

Section: Modulationmentioning

confidence: 99%

Versatile AC Current Control Technique for a Battery Using Power Converters

Islam

Park

2021

Batteries

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Although a battery is a DC device, AC current is often necessary for testing, preheating, impedance spectroscopy, and advanced charging. This paper presents a versatile control technique to inject AC current to a battery. Synchronous buck and H-bridge topologies are operated in bidirectional mode and controlled by uni-polar and bi-polar pulse width modulation techniques for the AC current injection. The input and output passive circuits are specially designed considering AC current and the properties of the battery. A controller is proposed considering a small internal impedance, small AC ripple voltage, and variable DC offset voltage of a battery. The controller is capable of maintaining stable operation of AC current injection in two power quadrant within a small DC voltage boundary of a battery. The controller is comprised of a feedback compensator, a feedforward term, and an estimator. The feedback gain is designed considering the internal impedance. The feedforward gain is designed based on estimated open circuit battery voltage and input voltage. The open circuit voltage estimator is designed based on filters and battery model. For validation, AC current is injected to a Valence U-12XP battery. The battery is rated for 40 Ah nominal capacity and 13.8 V nominal voltage The controller successfully injected AC current to a battery with +10 A, 0 A and −10 A DC currents. The magnitude and frequency of the AC current was up to 5 A and 2 kHz respectively.

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“…V out is always positive, therefore d bi V in is always significantly higher than (1 − d bi )V in . The relationship between d bi and d is represented by (20)- (22).…”

Section: Modulationmentioning

confidence: 99%

Versatile AC Current Control Technique for a Battery Using Power Converters

Islam

Park

2021

Batteries

View full text Add to dashboard Cite

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“…The two-stage inverters are widely used for grid connected inverter and on-board charger of electric vehicle. However, two-stage converters require a large electrolytic capacitor, resulting in a large size and short lifetime of system [1][2] .…”

Section: Introductionmentioning

confidence: 99%

A new three voltage level space vector modulation for high-frequency link matrix converter

Cai

Liu

2023

5th International Conference on Information Science, Electrical, and Automation Engineering (ISEAE 2023)

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The high-frequency link matrix converter (HFLMC) is composed of a traditional H-bridge circuit connected with the matrix converter through a single-phase high-frequency transformer (HFT). Compared with the traditional isolated converter, the high-frequency link matrix converter not only realizes the isolated DC-AC conversion, but also improves the transmission efficiency. However, the SVPWM modulation method for high-frequency link matrix converter will have relatively large circulating currents. In this paper, the reason of circulating currents of high-frequency link matrix converter is analyzed. Based on space vector modulation, an improved SVM modulation on method is proposed. A zero vector state is added between the two active vectors to reduce the circulating currents generated when switching between the active vectors. The working mode of the improved SVM modulation method and the active vector action time are analyzed. Finally, the correctness of the modulation method proposed in this paper is verified by simulation.

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