Virtual Flux Voltage-Oriented Vector Control Method of Wide Frequency Active Rectifiers Based on Dual Low-Pass Filter

Bi, Kai; Xu, Yamei; Zeng, Pin; Chen, Wei; Li, Xinmin

doi:10.3390/wevj13020035

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…This approach helps to regulate line current harmonics, power factor and DC-link voltage by controlling instantaneous active power and reactive power input [85,100]. This strategy also allows for the synchronization of the voltage of the FCS rectifier with the voltage condition at the PCC [101].…”

Section: Summary Of the Most Recent State-of-the-art Achievements In ...mentioning

confidence: 99%

State-of-the-Art Grid Stability Improvement Techniques for Electric Vehicle Fast-Charging Stations for Future Outlooks

Momoh,

Zulkifli,

Korba

et al. 2023

Energies

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The growing trend for electric vehicles (EVs) and fast-charging stations (FCSs) will cause the overloading of grids due to the high current injection from FCSs’ converters. The insensitive nature of the state of charge (SOC) of EV batteries during FCS operation often results in grid instability problems, such as voltage and frequency deviation at the point of common coupling (PCC). Therefore, many researchers have focused on two-stage converter control (TSCC) and single-stage converter (SSC) control for FCS stability enhancement, and suggested that SSC architectures are superior in performance, unlike the TSCC methods. However, only a few research works have focused on SSC techniques, despite the techniques’ ability to provide inertia and damping support through the virtual synchronous machine (VSM) strategy due to power decoupling and dynamic response problems. TSCC methods deploy current or voltage control for controlling EVs’ SOC battery charging through proportional-integral (PI), proportional-resonant (PR), deadbeat or proportional-integral-derivative (PID) controllers, but these are relegated by high current harmonics, frequency fluctuation and switching losses due to transient switching. This paper reviewed the linkage between the latest research contributions, issues associated with TSCC and SSC techniques, and the performance evaluation of the techniques, and subsequently identified the research gaps and proposed SSC control with SOC consideration for further research studies.

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Section: Summary Of the Most Recent State-of-the-art Achievements In ...mentioning

confidence: 99%

State-of-the-Art Grid Stability Improvement Techniques for Electric Vehicle Fast-Charging Stations for Future Outlooks

Momoh,

Zulkifli,

Korba

et al. 2023

Energies

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show abstract

“…By summarizing the methods used in the above literature, it can be seen that for the fourquadrant pulse rectifier controlled by a voltage and current double-closed loop, there are roughly two types of suppression strategies: one is to add compensation to the inner current loop such as introducing a repetitive controller, proportional resonance control and other methods [20,21], but such methods will affect the dynamic performance of the system. Another type of method is to filter out the beat frequency voltage before DC side voltage appears in the control system [22,23], such as adding a notch filter, low-pass filter, or dynamic compensation for the DC side voltage, etc. These methods can effectively solve the problem of slow dynamic response but compared to the LC resonance circuit, the low-order current harmonic suppression effect is poorer.…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Zhao,

Zhang,

Chen

et al. 2022

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In order to meet the lightweight requirements of high-speed trains, the inductancecapacitance (LC) resonance circuits are cancelled in the traction drive system of some high-speed electric multiple units (EMUs) in China, which will lead to large low-order current harmonics on the grid side in the traction drive system of EMUs, seriously affecting the power quality. Therefore, the low-order harmonic current of the traction drive system of an EMU is studied in this paper. Firstly, the working principle of a four-quadrant pulse rectifier in a traction drive system is analyzed, and then the generation mechanism of loworder current harmonics on the grid side is studied deeply. Secondly, the voltage outer loop and current inner loop control of a four-quadrant pulse rectifier are optimized respectively. In the voltage outer loop control, a Butterworth filter is designed to suppress the beat frequency voltage of the DC side voltage, so as to indirectly suppress the low-order current harmonics. In the current inner loop, a quasi-proportional resonance (PR) controller with harmonic compensation is used to suppress low-order current harmonics, and a novel loworder current harmonics suppression strategy based on the Butterworth filter and quasi-PR controller is proposed. Finally, the results of the simulated validation of the proposed control strategy show that compared with the existing method of the notch filter + PR controller, the proposed optimal control strategy has a better effect on low-order current harmonic suppression, and improves the dynamic performance of the control system, further showing the correctness and effectiveness of the optimal control strategy.

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Direct power decoupling control using optimal switching table combined with virtual flux estimator for PWM rectifier

Bouaziz,

Bacha

2024

Electr Eng

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This paper presents the design and implementation of a Direct Power Control (DPC) based on virtual flux estimator and optimal Switching Table (VF-ST-DPC) for a three phase PWM rectifier. The proposed approach is based on the combination of the DPC technique principle, virtual flux estimator technique and an optimal switching table (ST) to select the optimal converter vector control. The objectives of approach are to solve the cross-coupling between the instantaneous active and the reactive power for each sector and improve the harmonic line currents. Thus, the proposed method is realized in the fixed coordinate frame, so, does not require Park's transformation and the voltage grid synchronization is achieved by a virtual flux estimation method. Both, experimental results based on the dSPACE DS1104 card show that the VF-ST-DPC guarantees a smooth and decoupled control of instantaneous active and reactive power and provide a low harmonic (THD=4.6%) by verifying the expected performances of the proposed method under steady-state and transient operation.

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Virtual Flux Voltage-Oriented Vector Control Method of Wide Frequency Active Rectifiers Based on Dual Low-Pass Filter

Cited by 5 publications

References 21 publications

State-of-the-Art Grid Stability Improvement Techniques for Electric Vehicle Fast-Charging Stations for Future Outlooks

State-of-the-Art Grid Stability Improvement Techniques for Electric Vehicle Fast-Charging Stations for Future Outlooks

Archives of Electrical Engineering

Direct power decoupling control using optimal switching table combined with virtual flux estimator for PWM rectifier

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